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2019-02-06perf powerpc: Add missing headers to skip-callchain-idx.cArnaldo Carvalho de Melo1-0/+3
It uses several structs but don't explicitely includes the headers where they are defined, getting them by sheer luck from one of the headers it includes, since those are being streamlined to avoid unnecessary rebuilds when changes are made to a random header, they will break, fix them now so that they continue to build. Cc: Adrian Hunter <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Maynard Johnson <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Naveen N. Rao <[email protected]> Cc: Ravi Bangoria <[email protected]> Cc: Sandipan Das <[email protected]> Cc: Sukadev Bhattiprolu <[email protected]> Link: https://lkml.kernel.org/n/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2019-02-04perf mem/c2c: Fix perf_mem_events to support powerpcRavi Bangoria2-0/+12
PowerPC hardware does not have a builtin latency filter (--ldlat) for the "mem-load" event and perf_mem_events by default includes "/ldlat=30/" which is causing a failure on PowerPC. Refactor the code to support "perf mem/c2c" on PowerPC. This patch depends on kernel side changes done my Madhavan: https://lists.ozlabs.org/pipermail/linuxppc-dev/2018-December/182596.html Signed-off-by: Ravi Bangoria <[email protected]> Acked-by: Jiri Olsa <[email protected]> Cc: Dick Fowles <[email protected]> Cc: Don Zickus <[email protected]> Cc: Joe Mario <[email protected]> Cc: Madhavan Srinivasan <[email protected]> Cc: Michael Ellerman <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: [email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2019-01-19Merge tag 'powerpc-5.0-3' of ↵Linus Torvalds2-1/+3
git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull powerpc fixes from Michael Ellerman: "A couple of weeks of fixes. There's one fix for an oops on Power9 machines with Open CAPI adapters. And a fix for probable memory corruption in some of the new NPU code, caught by smatch though and not seen in the wild. Plus a few other minor fixes. There's one non-fix which is the perf_regs change. That was sent during the merge window but I accidentally only merged the first of two patches in the series. It's been in linux-next so hopefully doesn't conflict with anything in acme's tree. Thanks to: Alexey Kardashevskiy, Andrew Donnellan, Breno Leitao, Christian Lamparter, Christophe Leroy, Dan Carpenter, Frederic Barrat, Greg Kurz, Jason A. Donenfeld, Madhavan Srinivasan" * tag 'powerpc-5.0-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: powerpc/syscalls: Fix syscall tracing powerpc/pseries: Fix build break due to pnv_npu2_init() powerpc/4xx/ocm: Fix fix for phys_addr_t printf warnings powerpc/powernv/npu: Fix oops in pnv_try_setup_npu_table_group() powerpc/tm: Limit TM code inside PPC_TRANSACTIONAL_MEM powerpc/8xx: fix setting of pagetable for Abatron BDI debug tool. powerpc/powernv/npu: Allocate enough memory in pnv_try_setup_npu_table_group() powerpc/perf: Update perf_regs structure to include MMCRA
2019-01-10perf powerpc: Rework syscall table generationRavi Bangoria3-14/+450
Commit aff850393200 ("powerpc: add system call table generation support") changed how systemcall table is generated for powerpc. Incorporate these changes into perf as well. Committer testing: $ podman run --entrypoint=/bin/sh --privileged -v /home/acme/git:/git --rm -ti docker.io/acmel/linux-perf-tools-build-ubuntu:18.04-x-powerpc64 perfbuilder@d7a7af166a80:/git/perf$ head -2 /etc/os-release NAME="Ubuntu" VERSION="18.04.1 LTS (Bionic Beaver)" perfbuilder@d7a7af166a80:/git/perf$ perfbuilder@d7a7af166a80:/git/perf$ make ARCH=powerpc CROSS_COMPILE=powerpc64-linux-gnu- EXTRA_CFLAGS= -C /git/linux/tools/perf O=/tmp/build/perf make: Entering directory '/git/linux/tools/perf' BUILD: Doing 'make -j8' parallel build HOSTCC /tmp/build/perf/fixdep.o HOSTLD /tmp/build/perf/fixdep-in.o LINK /tmp/build/perf/fixdep Warning: Kernel ABI header at 'tools/include/uapi/linux/mman.h' differs from latest version at 'include/uapi/linux/mman.h' diff -u tools/include/uapi/linux/mman.h include/uapi/linux/mman.h sh: 1: command: Illegal option -c Auto-detecting system features: ... dwarf: [ on ] ... dwarf_getlocations: [ on ] ... glibc: [ on ] ... gtk2: [ OFF ] ... libaudit: [ OFF ] ... libbfd: [ OFF ] ... libelf: [ on ] ... libnuma: [ OFF ] ... numa_num_possible_cpus: [ OFF ] ... libperl: [ OFF ] ... libpython: [ OFF ] ... libslang: [ OFF ] ... libcrypto: [ OFF ] ... libunwind: [ OFF ] ... libdw-dwarf-unwind: [ on ] ... zlib: [ on ] ... lzma: [ OFF ] ... get_cpuid: [ OFF ] ... bpf: [ on ] Makefile.config:445: No sys/sdt.h found, no SDT events are defined, please install systemtap-sdt-devel or systemtap-sdt-dev Makefile.config:491: No libunwind found. Please install libunwind-dev[el] >= 1.1 and/or set LIBUNWIND_DIR Makefile.config:583: No libcrypto.h found, disables jitted code injection, please install libssl-devel or libssl-dev Makefile.config:598: slang not found, disables TUI support. Please install slang-devel, libslang-dev or libslang2-dev Makefile.config:612: GTK2 not found, disables GTK2 support. Please install gtk2-devel or libgtk2.0-dev Makefile.config:639: Missing perl devel files. Disabling perl scripting support, please install perl-ExtUtils-Embed/libperl-dev Makefile.config:666: No python interpreter was found: disables Python support - please install python-devel/python-dev Makefile.config:721: No bfd.h/libbfd found, please install binutils-dev[el]/zlib-static/libiberty-dev to gain symbol demangling Makefile.config:750: No liblzma found, disables xz kernel module decompression, please install xz-devel/liblzma-dev Makefile.config:763: No numa.h found, disables 'perf bench numa mem' benchmark, please install numactl-devel/libnuma-devel/libnuma-dev Makefile.config:814: No libbabeltrace found, disables 'perf data' CTF format support, please install libbabeltrace-dev[el]/libbabeltrace-ctf-dev Makefile.config:840: No alternatives command found, you need to set JDIR= to point to the root of your Java directory GEN /tmp/build/perf/common-cmds.h <SNIP> CC /tmp/build/perf/util/syscalltbl.o <SNIP> LD /tmp/build/perf/libperf-in.o AR /tmp/build/perf/libperf.a LINK /tmp/build/perf/perf make: Leaving directory '/git/linux/tools/perf' perfbuilder@d7a7af166a80:/git/perf$ head /tmp/build/perf/arch/powerpc/include/generated/asm/syscalls_64.c static const char *syscalltbl_powerpc_64[] = { [0] = "restart_syscall", [1] = "exit", [2] = "fork", [3] = "read", [4] = "write", [5] = "open", [6] = "close", [7] = "waitpid", [8] = "creat", perfbuilder@d7a7af166a80:/git/perf$ tail /tmp/build/perf/arch/powerpc/include/generated/asm/syscalls_64.c [381] = "pwritev2", [382] = "kexec_file_load", [383] = "statx", [384] = "pkey_alloc", [385] = "pkey_free", [386] = "pkey_mprotect", [387] = "rseq", [388] = "io_pgetevents", }; #define SYSCALLTBL_POWERPC_64_MAX_ID 388 perfbuilder@d7a7af166a80:/git/perf$ head /tmp/build/perf/arch/powerpc/include/generated/asm/syscalls_32.c static const char *syscalltbl_powerpc_32[] = { [0] = "restart_syscall", [1] = "exit", [2] = "fork", [3] = "read", [4] = "write", [5] = "open", [6] = "close", [7] = "waitpid", [8] = "creat", perfbuilder@d7a7af166a80:/git/perf$ tail /tmp/build/perf/arch/powerpc/include/generated/asm/syscalls_32.c [381] = "pwritev2", [382] = "kexec_file_load", [383] = "statx", [384] = "pkey_alloc", [385] = "pkey_free", [386] = "pkey_mprotect", [387] = "rseq", [388] = "io_pgetevents", }; #define SYSCALLTBL_POWERPC_32_MAX_ID 388 perfbuilder@d7a7af166a80:/git/perf$ Signed-off-by: Ravi Bangoria <[email protected]> Reported-by: Arnaldo Carvalho de Melo <[email protected]> Tested-by: Arnaldo Carvalho de Melo <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Michael Ellerman <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: [email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2019-01-08powerpc/perf: Update perf_regs structure to include MMCRAMadhavan Srinivasan2-1/+3
On each sample, Monitor Mode Control Register A (MMCRA) content is saved in pt_regs. MMCRA does not have a entry as-is in the pt_regs but instead, MMCRA content is saved in the "dsisr" register of pt_regs. Patch adds another entry to the perf_regs structure to include the "MMCRA" printing which internally maps to the "dsisr" of pt_regs. It also check for the MMCRA availability in the platform and present value accordingly mpe: This was the 2nd patch in a series with commit 333804dc3b7a ("powerpc/perf: Update perf_regs structure to include SIER") but I accidentally only merged the 1st patch, so merge this one now. Signed-off-by: Madhavan Srinivasan <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2018-12-20powerpc/perf: Update perf_regs structure to include SIERMadhavan Srinivasan2-1/+3
On each sample, Sample Instruction Event Register (SIER) content is saved in pt_regs. SIER does not have a entry as-is in the pt_regs but instead, SIER content is saved in the "dar" register of pt_regs. Patch adds another entry to the perf_regs structure to include the "SIER" printing which internally maps to the "dar" of pt_regs. It also check for the SIER availability in the platform and present value accordingly Signed-off-by: Madhavan Srinivasan <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2018-10-09Merge remote-tracking branch 'remotes/powerpc/topic/ppc-kvm' into kvm-ppc-nextPaul Mackerras1-1/+0
This merges in the "ppc-kvm" topic branch of the powerpc tree to get a series of commits that touch both general arch/powerpc code and KVM code. These commits will be merged both via the KVM tree and the powerpc tree. Signed-off-by: Paul Mackerras <[email protected]>
2018-10-09KVM: PPC: Book3S: Simplify external interrupt handlingPaul Mackerras1-1/+0
Currently we use two bits in the vcpu pending_exceptions bitmap to indicate that an external interrupt is pending for the guest, one for "one-shot" interrupts that are cleared when delivered, and one for interrupts that persist until cleared by an explicit action of the OS (e.g. an acknowledge to an interrupt controller). The BOOK3S_IRQPRIO_EXTERNAL bit is used for one-shot interrupt requests and BOOK3S_IRQPRIO_EXTERNAL_LEVEL is used for persisting interrupts. In practice BOOK3S_IRQPRIO_EXTERNAL never gets used, because our Book3S platforms generally, and pseries in particular, expect external interrupt requests to persist until they are acknowledged at the interrupt controller. That combined with the confusion introduced by having two bits for what is essentially the same thing makes it attractive to simplify things by only using one bit. This patch does that. With this patch there is only BOOK3S_IRQPRIO_EXTERNAL, and by default it has the semantics of a persisting interrupt. In order to avoid breaking the ABI, we introduce a new "external_oneshot" flag which preserves the behaviour of the KVM_INTERRUPT ioctl with the KVM_INTERRUPT_SET argument. Reviewed-by: David Gibson <[email protected]> Signed-off-by: Paul Mackerras <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2018-08-30perf probe powerpc: Ignore SyS symbols irrespective of endiannessSandipan Das1-1/+3
This makes sure that the SyS symbols are ignored for any powerpc system, not just the big endian ones. Reported-by: Naveen N. Rao <[email protected]> Signed-off-by: Sandipan Das <[email protected]> Reviewed-by: Kamalesh Babulal <[email protected]> Acked-by: Naveen N. Rao <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Ravi Bangoria <[email protected]> Fixes: fb6d59423115 ("perf probe ppc: Use the right prefix when ignoring SyS symbols on ppc") Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2018-08-09perf probe powerpc: Fix trace event post-processingSandipan Das1-1/+3
In some cases, a symbol may have multiple aliases. Attempting to add an entry probe for such symbols results in a probe being added at an incorrect location while it fails altogether for return probes. This is only applicable for binaries with debug information. During the arch-dependent post-processing, the offset from the start of the symbol at which the probe is to be attached is determined and added to the start address of the symbol to get the probe's location. In case there are multiple aliases, this offset gets added multiple times for each alias of the symbol and we end up with an incorrect probe location. This can be verified on a powerpc64le system as shown below. $ nm /lib/modules/$(uname -r)/build/vmlinux | grep "sys_open$" ... c000000000414290 T __se_sys_open c000000000414290 T sys_open $ objdump -d /lib/modules/$(uname -r)/build/vmlinux | grep -A 10 "<__se_sys_open>:" c000000000414290 <__se_sys_open>: c000000000414290: 19 01 4c 3c addis r2,r12,281 c000000000414294: 70 c4 42 38 addi r2,r2,-15248 c000000000414298: a6 02 08 7c mflr r0 c00000000041429c: e8 ff a1 fb std r29,-24(r1) c0000000004142a0: f0 ff c1 fb std r30,-16(r1) c0000000004142a4: f8 ff e1 fb std r31,-8(r1) c0000000004142a8: 10 00 01 f8 std r0,16(r1) c0000000004142ac: c1 ff 21 f8 stdu r1,-64(r1) c0000000004142b0: 78 23 9f 7c mr r31,r4 c0000000004142b4: 78 1b 7e 7c mr r30,r3 For both the entry probe and the return probe, the probe location should be _text+4276888 (0xc000000000414298). Since another alias exists for 'sys_open', the post-processing code will end up adding the offset (8 for powerpc64le) twice and perf will attempt to add the probe at _text+4276896 (0xc0000000004142a0) instead. Before: # perf probe -v -a sys_open probe-definition(0): sys_open symbol:sys_open file:(null) line:0 offset:0 return:0 lazy:(null) 0 arguments Looking at the vmlinux_path (8 entries long) Using /lib/modules/4.18.0-rc8+/build/vmlinux for symbols Open Debuginfo file: /lib/modules/4.18.0-rc8+/build/vmlinux Try to find probe point from debuginfo. Symbol sys_open address found : c000000000414290 Matched function: __se_sys_open [2ad03a0] Probe point found: __se_sys_open+0 Found 1 probe_trace_events. Opening /sys/kernel/debug/tracing/kprobe_events write=1 Writing event: p:probe/sys_open _text+4276896 Added new event: probe:sys_open (on sys_open) ... # perf probe -v -a sys_open%return $retval probe-definition(0): sys_open%return symbol:sys_open file:(null) line:0 offset:0 return:1 lazy:(null) 0 arguments Looking at the vmlinux_path (8 entries long) Using /lib/modules/4.18.0-rc8+/build/vmlinux for symbols Open Debuginfo file: /lib/modules/4.18.0-rc8+/build/vmlinux Try to find probe point from debuginfo. Symbol sys_open address found : c000000000414290 Matched function: __se_sys_open [2ad03a0] Probe point found: __se_sys_open+0 Found 1 probe_trace_events. Opening /sys/kernel/debug/tracing/README write=0 Opening /sys/kernel/debug/tracing/kprobe_events write=1 Parsing probe_events: p:probe/sys_open _text+4276896 Group:probe Event:sys_open probe:p Writing event: r:probe/sys_open__return _text+4276896 Failed to write event: Invalid argument Error: Failed to add events. Reason: Invalid argument (Code: -22) After: # perf probe -v -a sys_open probe-definition(0): sys_open symbol:sys_open file:(null) line:0 offset:0 return:0 lazy:(null) 0 arguments Looking at the vmlinux_path (8 entries long) Using /lib/modules/4.18.0-rc8+/build/vmlinux for symbols Open Debuginfo file: /lib/modules/4.18.0-rc8+/build/vmlinux Try to find probe point from debuginfo. Symbol sys_open address found : c000000000414290 Matched function: __se_sys_open [2ad03a0] Probe point found: __se_sys_open+0 Found 1 probe_trace_events. Opening /sys/kernel/debug/tracing/kprobe_events write=1 Writing event: p:probe/sys_open _text+4276888 Added new event: probe:sys_open (on sys_open) ... # perf probe -v -a sys_open%return $retval probe-definition(0): sys_open%return symbol:sys_open file:(null) line:0 offset:0 return:1 lazy:(null) 0 arguments Looking at the vmlinux_path (8 entries long) Using /lib/modules/4.18.0-rc8+/build/vmlinux for symbols Open Debuginfo file: /lib/modules/4.18.0-rc8+/build/vmlinux Try to find probe point from debuginfo. Symbol sys_open address found : c000000000414290 Matched function: __se_sys_open [2ad03a0] Probe point found: __se_sys_open+0 Found 1 probe_trace_events. Opening /sys/kernel/debug/tracing/README write=0 Opening /sys/kernel/debug/tracing/kprobe_events write=1 Parsing probe_events: p:probe/sys_open _text+4276888 Group:probe Event:sys_open probe:p Writing event: r:probe/sys_open__return _text+4276888 Added new event: probe:sys_open__return (on sys_open%return) ... Reported-by: Aneesh Kumar <[email protected]> Signed-off-by: Sandipan Das <[email protected]> Acked-by: Naveen N. Rao <[email protected]> Cc: Aneesh Kumar <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Ravi Bangoria <[email protected]> Fixes: 99e608b5954c ("perf probe ppc64le: Fix probe location when using DWARF") Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2018-07-24perf powerpc: Fix callchain ip filtering when return address is in a registerSandipan Das1-2/+6
For powerpc64, perf will filter out the second entry in the callchain, i.e. the LR value, if the return address of the function corresponding to the probed location has already been saved on its caller's stack. The state of the return address is determined using debug information. At any point within a function, if the return address is already saved somewhere, a DWARF expression can tell us about its location. If the return address in still in LR only, no DWARF expression would exist. Typically, the instructions in a function's prologue first copy the LR value to R0 and then pushes R0 on to the stack. If LR has already been copied to R0 but R0 is yet to be pushed to the stack, we can still get a DWARF expression that says that the return address is in R0. This is indicating that getting a DWARF expression for the return address does not guarantee the fact that it has already been saved on the stack. This can be observed on a powerpc64le system running Fedora 27 as shown below. # objdump -d /usr/lib64/libc-2.26.so | less ... 000000000015af20 <inet_pton>: 15af20: 0b 00 4c 3c addis r2,r12,11 15af24: e0 c1 42 38 addi r2,r2,-15904 15af28: a6 02 08 7c mflr r0 15af2c: f0 ff c1 fb std r30,-16(r1) 15af30: f8 ff e1 fb std r31,-8(r1) 15af34: 78 1b 7f 7c mr r31,r3 15af38: 78 23 83 7c mr r3,r4 15af3c: 78 2b be 7c mr r30,r5 15af40: 10 00 01 f8 std r0,16(r1) 15af44: c1 ff 21 f8 stdu r1,-64(r1) 15af48: 28 00 81 f8 std r4,40(r1) ... # readelf --debug-dump=frames-interp /usr/lib64/libc-2.26.so | less ... 00027024 0000000000000024 00027028 FDE cie=00000000 pc=000000000015af20..000000000015af88 LOC CFA r30 r31 ra 000000000015af20 r1+0 u u u 000000000015af34 r1+0 c-16 c-8 r0 000000000015af48 r1+64 c-16 c-8 c+16 000000000015af5c r1+0 c-16 c-8 c+16 000000000015af78 r1+0 u u ... # perf probe -x /usr/lib64/libc-2.26.so -a inet_pton+0x18 # perf record -e probe_libc:inet_pton -g ping -6 -c 1 ::1 # perf script Before: ping 2829 [005] 512917.460174: probe_libc:inet_pton: (7fff7e2baf38) 7fff7e2baf38 __GI___inet_pton+0x18 (/usr/lib64/libc-2.26.so) 7fff7e2705b4 getaddrinfo+0x164 (/usr/lib64/libc-2.26.so) 12f152d70 _init+0xbfc (/usr/bin/ping) 7fff7e1836a0 generic_start_main.isra.0+0x140 (/usr/lib64/libc-2.26.so) 7fff7e183898 __libc_start_main+0xb8 (/usr/lib64/libc-2.26.so) 0 [unknown] ([unknown]) After: ping 2829 [005] 512917.460174: probe_libc:inet_pton: (7fff7e2baf38) 7fff7e2baf38 __GI___inet_pton+0x18 (/usr/lib64/libc-2.26.so) 7fff7e26fa54 gaih_inet.constprop.7+0xf44 (/usr/lib64/libc-2.26.so) 7fff7e2705b4 getaddrinfo+0x164 (/usr/lib64/libc-2.26.so) 12f152d70 _init+0xbfc (/usr/bin/ping) 7fff7e1836a0 generic_start_main.isra.0+0x140 (/usr/lib64/libc-2.26.so) 7fff7e183898 __libc_start_main+0xb8 (/usr/lib64/libc-2.26.so) 0 [unknown] ([unknown]) Reported-by: Ravi Bangoria <[email protected]> Signed-off-by: Sandipan Das <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Maynard Johnson <[email protected]> Cc: Naveen N. Rao <[email protected]> Cc: Ravi Bangoria <[email protected]> Cc: Sukadev Bhattiprolu <[email protected]> Link: http://lkml.kernel.org/r/66e848a7bdf2d43b39210a705ff6d828a0865661.1530724939.git.sandipan@linux.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2018-07-24perf powerpc: Fix callchain ip filteringSandipan Das1-1/+1
For powerpc64, redundant entries in the callchain are filtered out by determining the state of the return address and the stack frame using DWARF debug information. For making these filtering decisions we must analyze the debug information for the location corresponding to the program counter value, i.e. the first entry in the callchain, and not the LR value; otherwise, perf may filter out either the second or the third entry in the callchain incorrectly. This can be observed on a powerpc64le system running Fedora 27 as shown below. Case 1 - Attaching a probe at inet_pton+0x8 (binary offset 0x15af28). Return address is still in LR and a new stack frame is not yet allocated. The LR value, i.e. the second entry, should not be filtered out. # objdump -d /usr/lib64/libc-2.26.so | less ... 000000000010eb10 <gaih_inet.constprop.7>: ... 10fa48: 78 bb e4 7e mr r4,r23 10fa4c: 0a 00 60 38 li r3,10 10fa50: d9 b4 04 48 bl 15af28 <inet_pton+0x8> 10fa54: 00 00 00 60 nop 10fa58: ac f4 ff 4b b 10ef04 <gaih_inet.constprop.7+0x3f4> ... 0000000000110450 <getaddrinfo>: ... 1105a8: 54 00 ff 38 addi r7,r31,84 1105ac: 58 00 df 38 addi r6,r31,88 1105b0: 69 e5 ff 4b bl 10eb18 <gaih_inet.constprop.7+0x8> 1105b4: 78 1b 71 7c mr r17,r3 1105b8: 50 01 7f e8 ld r3,336(r31) ... 000000000015af20 <inet_pton>: 15af20: 0b 00 4c 3c addis r2,r12,11 15af24: e0 c1 42 38 addi r2,r2,-15904 15af28: a6 02 08 7c mflr r0 15af2c: f0 ff c1 fb std r30,-16(r1) 15af30: f8 ff e1 fb std r31,-8(r1) ... # perf probe -x /usr/lib64/libc-2.26.so -a inet_pton+0x8 # perf record -e probe_libc:inet_pton -g ping -6 -c 1 ::1 # perf script Before: ping 4507 [002] 514985.546540: probe_libc:inet_pton: (7fffa7dbaf28) 7fffa7dbaf28 __GI___inet_pton+0x8 (/usr/lib64/libc-2.26.so) 7fffa7d705b4 getaddrinfo+0x164 (/usr/lib64/libc-2.26.so) 13fb52d70 _init+0xbfc (/usr/bin/ping) 7fffa7c836a0 generic_start_main.isra.0+0x140 (/usr/lib64/libc-2.26.so) 7fffa7c83898 __libc_start_main+0xb8 (/usr/lib64/libc-2.26.so) 0 [unknown] ([unknown]) After: ping 4507 [002] 514985.546540: probe_libc:inet_pton: (7fffa7dbaf28) 7fffa7dbaf28 __GI___inet_pton+0x8 (/usr/lib64/libc-2.26.so) 7fffa7d6fa54 gaih_inet.constprop.7+0xf44 (/usr/lib64/libc-2.26.so) 7fffa7d705b4 getaddrinfo+0x164 (/usr/lib64/libc-2.26.so) 13fb52d70 _init+0xbfc (/usr/bin/ping) 7fffa7c836a0 generic_start_main.isra.0+0x140 (/usr/lib64/libc-2.26.so) 7fffa7c83898 __libc_start_main+0xb8 (/usr/lib64/libc-2.26.so) 0 [unknown] ([unknown]) Case 2 - Attaching a probe at _int_malloc+0x180 (binary offset 0x9cf10). Return address in still in LR and a new stack frame has already been allocated but not used. The caller's caller, i.e. the third entry, is invalid and should be filtered out and not the second one. # objdump -d /usr/lib64/libc-2.26.so | less ... 000000000009cd90 <_int_malloc>: 9cd90: 17 00 4c 3c addis r2,r12,23 9cd94: 70 a3 42 38 addi r2,r2,-23696 9cd98: 26 00 80 7d mfcr r12 9cd9c: f8 ff e1 fb std r31,-8(r1) 9cda0: 17 00 e4 3b addi r31,r4,23 9cda4: d8 ff 61 fb std r27,-40(r1) 9cda8: 78 23 9b 7c mr r27,r4 9cdac: 1f 00 bf 2b cmpldi cr7,r31,31 9cdb0: f0 ff c1 fb std r30,-16(r1) 9cdb4: b0 ff c1 fa std r22,-80(r1) 9cdb8: 78 1b 7e 7c mr r30,r3 9cdbc: 08 00 81 91 stw r12,8(r1) 9cdc0: 11 ff 21 f8 stdu r1,-240(r1) 9cdc4: 4c 01 9d 41 bgt cr7,9cf10 <_int_malloc+0x180> 9cdc8: 20 00 a4 2b cmpldi cr7,r4,32 ... 9cf08: 00 00 00 60 nop 9cf0c: 00 00 42 60 ori r2,r2,0 9cf10: e4 06 ff 7b rldicr r31,r31,0,59 9cf14: 40 f8 a4 7f cmpld cr7,r4,r31 9cf18: 68 05 9d 41 bgt cr7,9d480 <_int_malloc+0x6f0> ... 000000000009e3c0 <tcache_init.part.4>: ... 9e420: 40 02 80 38 li r4,576 9e424: 78 fb e3 7f mr r3,r31 9e428: 71 e9 ff 4b bl 9cd98 <_int_malloc+0x8> 9e42c: 00 00 a3 2f cmpdi cr7,r3,0 9e430: 78 1b 7e 7c mr r30,r3 ... 000000000009f7a0 <__libc_malloc>: ... 9f8f8: 00 00 89 2f cmpwi cr7,r9,0 9f8fc: 1c ff 9e 40 bne cr7,9f818 <__libc_malloc+0x78> 9f900: c9 ea ff 4b bl 9e3c8 <tcache_init.part.4+0x8> 9f904: 00 00 00 60 nop 9f908: e8 90 22 e9 ld r9,-28440(r2) ... # perf probe -x /usr/lib64/libc-2.26.so -a _int_malloc+0x180 # perf record -e probe_libc:_int_malloc -g ./test-malloc # perf script Before: test-malloc 6554 [009] 515975.797403: probe_libc:_int_malloc: (7fffa6e6cf10) 7fffa6e6cf10 _int_malloc+0x180 (/usr/lib64/libc-2.26.so) 7fffa6dd0000 [unknown] (/usr/lib64/libc-2.26.so) 7fffa6e6f904 malloc+0x164 (/usr/lib64/libc-2.26.so) 7fffa6e6f9fc malloc+0x25c (/usr/lib64/libc-2.26.so) 100006b4 main+0x38 (/home/testuser/test-malloc) 7fffa6df36a0 generic_start_main.isra.0+0x140 (/usr/lib64/libc-2.26.so) 7fffa6df3898 __libc_start_main+0xb8 (/usr/lib64/libc-2.26.so) 0 [unknown] ([unknown]) After: test-malloc 6554 [009] 515975.797403: probe_libc:_int_malloc: (7fffa6e6cf10) 7fffa6e6cf10 _int_malloc+0x180 (/usr/lib64/libc-2.26.so) 7fffa6e6e42c tcache_init.part.4+0x6c (/usr/lib64/libc-2.26.so) 7fffa6e6f904 malloc+0x164 (/usr/lib64/libc-2.26.so) 7fffa6e6f9fc malloc+0x25c (/usr/lib64/libc-2.26.so) 100006b4 main+0x38 (/home/sandipan/test-malloc) 7fffa6df36a0 generic_start_main.isra.0+0x140 (/usr/lib64/libc-2.26.so) 7fffa6df3898 __libc_start_main+0xb8 (/usr/lib64/libc-2.26.so) 0 [unknown] ([unknown]) Signed-off-by: Sandipan Das <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Maynard Johnson <[email protected]> Cc: Naveen N. Rao <[email protected]> Cc: Ravi Bangoria <[email protected]> Cc: Sukadev Bhattiprolu <[email protected]> Fixes: a60335ba3298 ("perf tools powerpc: Adjust callchain based on DWARF debug info") Link: http://lkml.kernel.org/r/24bb726d91ed173aebc972ec3f41a2ef2249434e.1530724939.git.sandipan@linux.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2018-06-25perf report powerpc: Fix crash if callchain is emptySandipan Das1-1/+1
For some cases, the callchain provided by the kernel may be empty. So, the callchain ip filtering code will cause a crash if we do not check whether the struct ip_callchain pointer is NULL before accessing any members. This can be observed on a powerpc64le system running Fedora 27 as shown below. # perf record -b -e cycles:u ls Before: # perf report --branch-history perf: Segmentation fault -------- backtrace -------- perf[0x1027615c] linux-vdso64.so.1(__kernel_sigtramp_rt64+0x0)[0x7fff856304d8] perf(arch_skip_callchain_idx+0x44)[0x10257c58] perf[0x1017f2e4] perf(thread__resolve_callchain+0x124)[0x1017ff5c] perf(sample__resolve_callchain+0xf0)[0x10172788] ... After: # perf report --branch-history Samples: 25 of event 'cycles:u', Event count (approx.): 2306870 Overhead Source:Line Symbol Shared Object + 11.60% _init+35736 [.] _init ls + 9.84% strcoll_l.c:137 [.] __strcoll_l libc-2.26.so + 9.16% memcpy.S:175 [.] __memcpy_power7 libc-2.26.so + 9.01% gconv_charset.h:54 [.] _nl_find_locale libc-2.26.so + 8.87% dl-addr.c:52 [.] _dl_addr libc-2.26.so + 8.83% _init+236 [.] _init ls ... Reported-by: Ravi Bangoria <[email protected]> Signed-off-by: Sandipan Das <[email protected]> Acked-by: Ravi Bangoria <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Naveen N. Rao <[email protected]> Cc: Sukadev Bhattiprolu <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2018-04-26perf map: Remove map_type arg from map_groups__find()Arnaldo Carvalho de Melo1-1/+1
One more step in ditching the split. Cc: Adrian Hunter <[email protected]> Cc: David Ahern <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Wang Nan <[email protected]> Link: https://lkml.kernel.org/n/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2018-04-26perf map: Shorten map_groups__find() signatureArnaldo Carvalho de Melo1-1/+1
Removing the map_type, that is going away. Cc: Adrian Hunter <[email protected]> Cc: David Ahern <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Wang Nan <[email protected]> Link: https://lkml.kernel.org/n/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2018-04-26perf thread: Introduce thread__find_symbol()Arnaldo Carvalho de Melo1-2/+1
Out of thread__find_addr_location(..., MAP__FUNCTION, ...), idea here is to continue removing references to MAP__{FUNCTION,VARIABLE} ahead of getting both types of symbols in the same rbtree, as various places do two lookups, looking first at MAP__FUNCTION, then at MAP__VARIABLE. So thread__find_symbol() will eventually do just that, and 'struct symbol' will have the symbol type, for code that cares about that. Cc: Adrian Hunter <[email protected]> Cc: David Ahern <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Wang Nan <[email protected]> Link: https://lkml.kernel.org/n/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2018-02-16perf powerpc: Generate system call table from asm/unistd.hRavi Bangoria2-0/+62
This should speed up accessing new system calls introduced with the kernel rather than waiting for libaudit updates to include them. Signed-off-by: Ravi Bangoria <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Hendrik Brueckner <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Michael Ellerman <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Thomas Richter <[email protected]> Cc: [email protected] Link: http://lkml.kernel.org/r/[email protected] [ Made it generate syscall_32.c as well to fix the build on 32-bit ppc ] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2017-12-27perf probe: Find versioned symbols from mapMasami Hiramatsu1-0/+8
Commit d80406453ad4 ("perf symbols: Allow user probes on versioned symbols") allows user to find default versioned symbols (with "@@") in map. However, it did not enable normal versioned symbol (with "@") for perf-probe. E.g. ===== # ./perf probe -x /lib64/libc-2.25.so malloc_get_state Failed to find symbol malloc_get_state in /usr/lib64/libc-2.25.so Error: Failed to add events. ===== This solves above issue by improving perf-probe symbol search function, as below. ===== # ./perf probe -x /lib64/libc-2.25.so malloc_get_state Added new event: probe_libc:malloc_get_state (on malloc_get_state in /usr/lib64/libc-2.25.so) You can now use it in all perf tools, such as: perf record -e probe_libc:malloc_get_state -aR sleep 1 # ./perf probe -l probe_libc:malloc_get_state (on malloc_get_state@GLIBC_2.2.5 in /usr/lib64/libc-2.25.so) ===== Signed-off-by: Masami Hiramatsu <[email protected]> Reviewed-by: Thomas Richter <[email protected]> Acked-by: Ravi Bangoria <[email protected]> Tested-by: Arnaldo Carvalho de Melo <[email protected]> Cc: Paul Clarke <[email protected]> Cc: bhargavb <[email protected]> Cc: [email protected] Link: http://lkml.kernel.org/r/151275049269.24652.1639103455496216255.stgit@devbox Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2017-12-05perf pmu: Pass pmu as a parameter to get_cpuid_str()Ganapatrao Kulkarni1-1/+1
The cpuid string will not be same on all CPUs on heterogeneous platforms like ARM's big.LITTLE, adding provision(using pmu->cpus) to find cpuid string from associated CPUs of PMU CORE device. Also optimise arguments to function pmu_add_cpu_aliases. Signed-off-by: Ganapatrao Kulkarni <[email protected]> Acked-by: Will Deacon <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Catalin Marinas <[email protected]> Cc: Jayachandran C <[email protected]> Cc: Jonathan Cameron <[email protected]> Cc: [email protected] Cc: Mark Rutland <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Robert Richter <[email protected]> Cc: Shaokun Zhang <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2017-11-07Merge branch 'linus' into perf/core, to fix conflictsIngo Molnar14-0/+14
Conflicts: tools/perf/arch/arm/annotate/instructions.c tools/perf/arch/arm64/annotate/instructions.c tools/perf/arch/powerpc/annotate/instructions.c tools/perf/arch/s390/annotate/instructions.c tools/perf/arch/x86/tests/intel-cqm.c tools/perf/ui/tui/progress.c tools/perf/util/zlib.c Signed-off-by: Ingo Molnar <[email protected]>
2017-11-02License cleanup: add SPDX GPL-2.0 license identifier to files with no licenseGreg Kroah-Hartman14-0/+14
Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. Reviewed-by: Kate Stewart <[email protected]> Reviewed-by: Philippe Ombredanne <[email protected]> Reviewed-by: Thomas Gleixner <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2017-10-23perf annotate: Remove arch::cpuid_parse callbackJiri Olsa1-1/+3
There's no need for extra cpuid_parse arch callback, it can be handled directly in init callback. Adding the init function to x86 to cover the cpuid initialization. Signed-off-by: Jiri Olsa <[email protected]> Cc: Andi Kleen <[email protected]> Cc: David Ahern <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Peter Zijlstra <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2017-07-18perf probe: Allow placing uprobes in alternate namespaces.Krister Johansen1-1/+1
Teaches perf how to place a uprobe on a file that's in a different mount namespace. The user must add the probe using the --target-ns argument to perf probe. Once it has been placed, it may be recorded against without further namespace-specific commands. Signed-off-by: Krister Johansen <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Brendan Gregg <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Ravi Bangoria <[email protected]> [ PPC build fixed by Ravi: ] Link: http://lkml.kernel.org/r/1500287542-6219-1-git-send-email-ravi.bangoria@linux.vnet.ibm.com Cc: Thomas-Mich Richter <[email protected]> [ Fix !HAVE_DWARF_SUPPORT build ] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2017-06-21perf unwind: Support for powerpcPaolo Bonzini2-0/+75
Porting PPC to libdw only needs an architecture-specific hook to move the register state from perf to libdw. The ARM and x86 architectures already use libdw, and it is useful to have as much common code for the unwinder as possible. Mark Wielaard has contributed a frame-based unwinder to libdw, so that unwinding works even for binaries that do not have CFI information. In addition, libunwind is always preferred to libdw by the build machinery so this cannot introduce regressions on machines that have both libunwind and libdw installed. Signed-off-by: Paolo Bonzini <[email protected]> Acked-by: Jiri Olsa <[email protected]> Acked-by: Milian Wolff <[email protected]> Acked-by: Ravi Bangoria <[email protected]> Cc: Naveen N. Rao <[email protected]> Cc: [email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2017-05-02perf symbols: Allow user probes on versioned symbolsPaul Clarke1-0/+12
Symbol versioning, as in glibc, results in symbols being defined as: <real symbol>@[@]<version> (Note that "@@" identifies a default symbol, if the symbol name is repeated.) perf is currently unable to deal with this, and is unable to create user probes at such symbols: -- $ nm /lib/powerpc64le-linux-gnu/libpthread.so.0 | grep pthread_create 0000000000008d30 t __pthread_create_2_1 0000000000008d30 T pthread_create@@GLIBC_2.17 $ /usr/bin/sudo perf probe -v -x /lib/powerpc64le-linux-gnu/libpthread.so.0 pthread_create probe-definition(0): pthread_create symbol:pthread_create file:(null) line:0 offset:0 return:0 lazy:(null) 0 arguments Open Debuginfo file: /usr/lib/debug/lib/powerpc64le-linux-gnu/libpthread-2.19.so Try to find probe point from debuginfo. Probe point 'pthread_create' not found. Error: Failed to add events. Reason: No such file or directory (Code: -2) -- One is not able to specify the fully versioned symbol, either, due to syntactic conflicts with other uses of "@" by perf: -- $ /usr/bin/sudo perf probe -v -x /lib/powerpc64le-linux-gnu/libpthread.so.0 pthread_create@@GLIBC_2.17 probe-definition(0): pthread_create@@GLIBC_2.17 Semantic error :SRC@SRC is not allowed. 0 arguments Error: Command Parse Error. Reason: Invalid argument (Code: -22) -- This patch ignores versioning for default symbols, thus allowing probes to be created for these symbols: -- $ /usr/bin/sudo ./perf probe -x /lib/powerpc64le-linux-gnu/libpthread.so.0 pthread_create Added new event: probe_libpthread:pthread_create (on pthread_create in /lib/powerpc64le-linux-gnu/libpthread-2.19.so) You can now use it in all perf tools, such as: perf record -e probe_libpthread:pthread_create -aR sleep 1 $ /usr/bin/sudo ./perf record -e probe_libpthread:pthread_create -aR ./test 2 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.052 MB perf.data (2 samples) ] $ /usr/bin/sudo ./perf script test 2915 [000] 19124.260729: probe_libpthread:pthread_create: (3fff99248d38) test 2916 [000] 19124.260962: probe_libpthread:pthread_create: (3fff99248d38) $ /usr/bin/sudo ./perf probe --del=probe_libpthread:pthread_create Removed event: probe_libpthread:pthread_create -- Committer note: Change the variable storing the result of strlen() to 'int', to fix the build on debian:experimental-x-mipsel, fedora:24-x-ARC-uClibc, ubuntu:16.04-x-arm, etc: util/symbol.c: In function 'symbol__match_symbol_name': util/symbol.c:422:11: error: comparison between signed and unsigned integer expressions [-Werror=sign-compare] if (len < versioning - name) ^ Signed-off-by: Paul A. Clarke <[email protected]> Tested-by: Arnaldo Carvalho de Melo <[email protected]> Acked-by: Masami Hiramatsu <[email protected]> Cc: David Ahern <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2017-04-19perf tools: Include errno.h where neededArnaldo Carvalho de Melo2-0/+2
Removing it from util.h, part of an effort to disentangle the includes hell, that makes changes to util.h or something included by it to cause a complete rebuild of the tools. Cc: Adrian Hunter <[email protected]> Cc: David Ahern <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Wang Nan <[email protected]> Link: http://lkml.kernel.org/n/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2017-04-19perf tools: Replace STR() calls with __stringify()Arnaldo Carvalho de Melo1-2/+3
Both do the same thing, the later is the one we get from linux/stringify.h, i.e. we now use the same function name/practice as the kernel sources. Cc: Adrian Hunter <[email protected]> Cc: David Ahern <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Wang Nan <[email protected]> Link: http://lkml.kernel.org/n/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2017-04-04perf sdt powerpc: Add argument supportRavi Bangoria1-0/+111
SDT marker argument is in N@OP format. Here OP is arch dependent component. Add powerpc logic to parse OP and convert it to uprobe compatible format. Signed-off-by: Ravi Bangoria <[email protected]> Acked-by: Masami Hiramatsu <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Alexis Berlemont <[email protected]> Cc: Hemant Kumar <[email protected]> Cc: Michael Ellerman <[email protected]> Cc: Naveen N. Rao <[email protected]> Cc: Peter Zijlstra <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2017-03-14perf powerpc: Choose local entry point with kretprobesNaveen N. Rao1-4/+10
perf now uses an offset from _text/_stext for kretprobes if the kernel supports it, rather than the actual function name. As such, let's choose the LEP for powerpc ABIv2 so as to ensure the probe gets hit. Do it only if the kernel supports specifying offsets with kretprobes. Signed-off-by: Naveen N. Rao <[email protected]> Acked-by: Masami Hiramatsu <[email protected]> Cc: Ananth N Mavinakayanahalli <[email protected]> Cc: Michael Ellerman <[email protected]> Cc: Steven Rostedt <[email protected]> Cc: [email protected] Link: http://lkml.kernel.org/r/7445b5334673ef5404ac1d12609bad4d73d2b567.1488961018.git.naveen.n.rao@linux.vnet.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2016-11-25perf annotate: Initial PowerPC supportRavi Bangoria1-0/+58
Support the PowerPC architecture using the ins_ops association method. Committer notes: Testing it with a perf.data file collected on a PowerPC machine and cross-annotated on a x86_64 workstation, using the associated vmlinux file: $ perf report -i perf.data.f22vm.powerdev --vmlinux vmlinux.powerpc .ktime_get vmlinux.powerpc │ clrldi r9,r28,63 8.57 │ ┌──bne e0 <- TUI cursor positioned here │54:│ lwsync 2.86 │ │ std r2,40(r1) │ │ ld r9,144(r31) │ │ ld r3,136(r31) │ │ ld r30,184(r31) │ │ ld r10,0(r9) │ │ mtctr r10 │ │ ld r2,8(r9) 8.57 │ │→ bctrl │ │ ld r2,40(r1) │ │ ld r10,160(r31) │ │ ld r5,152(r31) │ │ lwz r7,168(r31) │ │ ld r9,176(r31) 8.57 │ │ lwz r6,172(r31) │ │ lwsync 2.86 │ │ lwz r8,128(r31) │ │ cmpw cr7,r8,r28 2.86 │ │↑ bne 48 │ │ subf r10,r10,r3 │ │ mr r3,r29 │ │ and r10,r10,r5 2.86 │ │ mulld r10,r10,r7 │ │ add r9,r10,r9 │ │ srd r9,r9,r6 │ │ add r9,r9,r30 │ │ std r9,0(r29) │ │ addi r1,r1,144 │ │ ld r0,16(r1) │ │ ld r28,-32(r1) │ │ ld r29,-24(r1) │ │ ld r30,-16(r1) │ │ mtlr r0 │ │ ld r31,-8(r1) │ │← blr 5.71 │e0:└─→mr r1,r1 11.43 │ mr r2,r2 11.43 │ lwz r28,128(r31) Press 'h' for help on key bindings $ perf report -i perf.data.f22vm.powerdev --header-only # ======== # captured on: Thu Nov 24 12:40:38 2016 # hostname : pdev-f22-qemu # os release : 4.4.10-200.fc22.ppc64 # perf version : 4.9.rc1.g6298ce # arch : ppc64 # nrcpus online : 48 # nrcpus avail : 48 # cpudesc : POWER7 (architected), altivec supported # cpuid : 74,513 # total memory : 4158976 kB # cmdline : /home/ravi/Workspace/linux/tools/perf/perf record -a # event : name = cycles:ppp, , size = 112, { sample_period, sample_freq } = 4000, sample_type = IP|TID|TIME|CPU|PERIOD, disabled = 1, inherit = 1, mmap = 1, comm = 1, freq = 1, task = 1, precise_ip = 3, sample_id_all = 1, exclude_guest = 1, mmap2 = 1, comm_exec = 1 # HEADER_CPU_TOPOLOGY info available, use -I to display # HEADER_NUMA_TOPOLOGY info available, use -I to display # pmu mappings: cpu = 4, software = 1, tracepoint = 2, breakpoint = 5 # missing features: HEADER_TRACING_DATA HEADER_BRANCH_STACK HEADER_GROUP_DESC HEADER_AUXTRACE HEADER_STAT HEADER_CACHE # ======== # $ Signed-off-by: Ravi Bangoria <[email protected]> Signed-off-by: Naveen N. Rao <[email protected]> Tested-by: Arnaldo Carvalho de Melo <[email protected]> Cc: Kim Phillips <[email protected]> Link: http://lkml.kernel.org/n/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2016-10-05perf uretprobe ppc64le: Fix probe locationRavi Bangoria1-1/+2
Perf uretprobe probes on GEP(Global Entry Point) which fails to record all function calls via LEP(Local Entry Point). Fix that by probing on LEP. Objdump: 00000000100005f0 <doit>: 100005f0: 02 10 40 3c lis r2,4098 100005f4: 00 7f 42 38 addi r2,r2,32512 100005f8: a6 02 08 7c mflr r0 100005fc: 10 00 01 f8 std r0,16(r1) 10000600: f8 ff e1 fb std r31,-8(r1) Before applying patch: $ cat /sys/kernel/debug/tracing/uprobe_events r:probe_uprobe_test/doit /home/ravi/uprobe_test:0x00000000000005f0 After applying patch: $ cat /sys/kernel/debug/tracing/uprobe_events r:probe_uprobe_test/doit /home/ravi/uprobe_test:0x00000000000005f8 This is not the case with kretprobes because the kernel itself finds LEP and probes on it. Signed-off-by: Ravi Bangoria <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Balbir Singh <[email protected]> Cc: Masami Hiramatsu <[email protected]> Cc: Naveen N. Rao <[email protected]> Cc: Peter Zijlstra <[email protected]> Link: http://lkml.kernel.org/r/1475576865-6562-1-git-send-email-ravi.bangoria@linux.vnet.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2016-10-03perf powerpc: Support CPU ID matching for PowerpcSukadev Bhattiprolu1-0/+11
Implement code that returns the generic CPU ID string for Powerpc. This will be used to identify the specific table of PMU events to parse/compare user specified events against. Signed-off-by: Sukadev Bhattiprolu <[email protected]> Acked-by: Ingo Molnar <[email protected]> Acked-by: Jiri Olsa <[email protected]> Cc: Madhavan Srinivasan <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: [email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2016-09-29perf tests: Add dwarf unwind test for powerpcRavi Bangoria7-0/+191
The user stack dump feature was recently added for powerpc. But there was no test case available to test it. This test works same as on other architectures by preparing a stack frame on the perf test thread and comparing each frame by unwinding it. $ ./perf test 50 50: Test dwarf unwind : Ok User stack dump for powerpc: https://lkml.org/lkml/2016/4/28/482 Signed-off-by: Ravi Bangoria <[email protected]> Acked-by: Jiri Olsa <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Anju T Sudhakar <[email protected]> Cc: Josh Poimboeuf <[email protected]> Cc: Masami Hiramatsu <[email protected]> Cc: Matt Fleming <[email protected]> Cc: Michael Ellerman <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Wang Nan <[email protected]> Cc: [email protected] Link: http://lkml.kernel.org/r/1474267100-31079-1-git-send-email-ravi.bangoria@linux.vnet.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2016-09-05perf symbols: Remove symbol_filter_t machineryArnaldo Carvalho de Melo1-1/+1
We're not using it anymore, few users were, but we really could do without it, simplify lots of functions by removing it. Cc: Adrian Hunter <[email protected]> Cc: David Ahern <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Masami Hiramatsu <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Wang Nan <[email protected]> Link: http://lkml.kernel.org/n/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2016-09-01perf probe: Support probing on offline cross-arch binaryMasami Hiramatsu1-0/+27
Support probing on offline cross-architecture binary by adding getting the target machine arch from ELF and choose correct register string for the machine. Here is an example: ----- $ perf probe --vmlinux=./vmlinux-arm --definition 'do_sys_open $params' p:probe/do_sys_open do_sys_open+0 dfd=%r5:s32 filename=%r1:u32 flags=%r6:s32 mode=%r3:u16 ----- Here, we can get probe/do_sys_open from above and append it to to the target machine's tracing/kprobe_events file in the tracefs mountput, usually /sys/kernel/debug/tracing/kprobe_events (or /sys/kernel/tracing/kprobe_events). Signed-off-by: Masami Hiramatsu <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Peter Zijlstra <[email protected]> Link: http://lkml.kernel.org/r/147214229717.23638.6440579792548044658.stgit@devbox [ Add definition for EM_AARCH64 to fix the build on at least centos 6, debian 7 & ubuntu 12.04.5 ] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2016-08-12perf ppc64le: Fix build failure when libelf is not presentRavi Bangoria1-0/+2
arch__post_process_probe_trace_events() calls get_target_map() to prepare symbol table. get_target_map() is defined inside util/probe-event.c. probe-event.c will only get included in perf binary if CONFIG_LIBELF is set. Hence arch__post_process_probe_trace_events() needs to be defined inside #ifdef HAVE_LIBELF_SUPPORT to solve compilation error. Reported-and-Tested-by: Anton Blanchard <[email protected]> Tested-by: Arnaldo Carvalho de Melo <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Balbir Singh <[email protected]> Cc: Naveen N. Rao <[email protected]> Cc: Ananth N Mavinakayanahalli <[email protected]> Cc: Masami Hiramatsu <[email protected]> Cc: Wang Nan <[email protected]> Cc: Namhyung Kim <[email protected]> Link: http://lkml.kernel.org/r/[email protected] [ Thunderbird MUA mangled it, fix that ] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2016-08-09perf probe ppc64le: Fix probe location when using DWARFRavi Bangoria1-4/+23
Powerpc has Global Entry Point and Local Entry Point for functions. LEP catches call from both the GEP and the LEP. Symbol table of ELF contains GEP and Offset from which we can calculate LEP, but debuginfo does not have LEP info. Currently, perf prioritize symbol table over dwarf to probe on LEP for ppc64le. But when user tries to probe with function parameter, we fall back to using dwarf(i.e. GEP) and when function called via LEP, probe will never hit. For example: $ objdump -d vmlinux ... do_sys_open(): c0000000002eb4a0: e8 00 4c 3c addis r2,r12,232 c0000000002eb4a4: 60 00 42 38 addi r2,r2,96 c0000000002eb4a8: a6 02 08 7c mflr r0 c0000000002eb4ac: d0 ff 41 fb std r26,-48(r1) $ sudo ./perf probe do_sys_open $ sudo cat /sys/kernel/debug/tracing/kprobe_events p:probe/do_sys_open _text+3060904 $ sudo ./perf probe 'do_sys_open filename:string' $ sudo cat /sys/kernel/debug/tracing/kprobe_events p:probe/do_sys_open _text+3060896 filename_string=+0(%gpr4):string For second case, perf probed on GEP. So when function will be called via LEP, probe won't hit. $ sudo ./perf record -a -e probe:do_sys_open ls [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.195 MB perf.data ] To resolve this issue, let's not prioritize symbol table, let perf decide what it wants to use. Perf is already converting GEP to LEP when it uses symbol table. When perf uses debuginfo, let it find LEP offset form symbol table. This way we fall back to probe on LEP for all cases. After patch: $ sudo ./perf probe 'do_sys_open filename:string' $ sudo cat /sys/kernel/debug/tracing/kprobe_events p:probe/do_sys_open _text+3060904 filename_string=+0(%gpr4):string $ sudo ./perf record -a -e probe:do_sys_open ls [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.197 MB perf.data (11 samples) ] Signed-off-by: Ravi Bangoria <[email protected]> Acked-by: Masami Hiramatsu <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Ananth N Mavinakayanahalli <[email protected]> Cc: Balbir Singh <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Naveen N. Rao <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Wang Nan <[email protected]> Link: http://lkml.kernel.org/r/1470723805-5081-2-git-send-email-ravi.bangoria@linux.vnet.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2016-05-20Merge tag 'powerpc-4.7-1' of ↵Linus Torvalds4-0/+216
git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull powerpc updates from Michael Ellerman: "Highlights: - Support for Power ISA 3.0 (Power9) Radix Tree MMU from Aneesh Kumar K.V - Live patching support for ppc64le (also merged via livepatching.git) Various cleanups & minor fixes from: - Aaro Koskinen, Alexey Kardashevskiy, Andrew Donnellan, Aneesh Kumar K.V, Chris Smart, Daniel Axtens, Frederic Barrat, Gavin Shan, Ian Munsie, Lennart Sorensen, Madhavan Srinivasan, Mahesh Salgaonkar, Markus Elfring, Michael Ellerman, Oliver O'Halloran, Paul Gortmaker, Paul Mackerras, Rashmica Gupta, Russell Currey, Suraj Jitindar Singh, Thiago Jung Bauermann, Valentin Rothberg, Vipin K Parashar. General: - Update LMB associativity index during DLPAR add/remove from Nathan Fontenot - Fix branching to OOL handlers in relocatable kernel from Hari Bathini - Add support for userspace Power9 copy/paste from Chris Smart - Always use STRICT_MM_TYPECHECKS from Michael Ellerman - Add mask of possible MMU features from Michael Ellerman PCI: - Enable pass through of NVLink to guests from Alexey Kardashevskiy - Cleanups in preparation for powernv PCI hotplug from Gavin Shan - Don't report error in eeh_pe_reset_and_recover() from Gavin Shan - Restore initial state in eeh_pe_reset_and_recover() from Gavin Shan - Revert "powerpc/eeh: Fix crash in eeh_add_device_early() on Cell" from Guilherme G Piccoli - Remove the dependency on EEH struct in DDW mechanism from Guilherme G Piccoli selftests: - Test cp_abort during context switch from Chris Smart - Add several tests for transactional memory support from Rashmica Gupta perf: - Add support for sampling interrupt register state from Anju T - Add support for unwinding perf-stackdump from Chandan Kumar cxl: - Configure the PSL for two CAPI ports on POWER8NVL from Philippe Bergheaud - Allow initialization on timebase sync failures from Frederic Barrat - Increase timeout for detection of AFU mmio hang from Frederic Barrat - Handle num_of_processes larger than can fit in the SPA from Ian Munsie - Ensure PSL interrupt is configured for contexts with no AFU IRQs from Ian Munsie - Add kernel API to allow a context to operate with relocate disabled from Ian Munsie - Check periodically the coherent platform function's state from Christophe Lombard Freescale: - Updates from Scott: "Contains 86xx fixes, minor device tree fixes, an erratum workaround, and a kconfig dependency fix." * tag 'powerpc-4.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (192 commits) powerpc/86xx: Fix PCI interrupt map definition powerpc/86xx: Move pci1 definition to the include file powerpc/fsl: Fix build of the dtb embedded kernel images powerpc/fsl: Fix rcpm compatible string powerpc/fsl: Remove FSL_SOC dependency from FSL_LBC powerpc/fsl-pci: Add a workaround for PCI 5 errata powerpc/fsl: Fix SPI compatible on t208xrdb and t1040rdb powerpc/powernv/npu: Add PE to PHB's list powerpc/powernv: Fix insufficient memory allocation powerpc/iommu: Remove the dependency on EEH struct in DDW mechanism Revert "powerpc/eeh: Fix crash in eeh_add_device_early() on Cell" powerpc/eeh: Drop unnecessary label in eeh_pe_change_owner() powerpc/eeh: Ignore handlers in eeh_pe_reset_and_recover() powerpc/eeh: Restore initial state in eeh_pe_reset_and_recover() powerpc/eeh: Don't report error in eeh_pe_reset_and_recover() Revert "powerpc/powernv: Exclude root bus in pnv_pci_reset_secondary_bus()" powerpc/powernv/npu: Enable NVLink pass through powerpc/powernv/npu: Rework TCE Kill handling powerpc/powernv/npu: Add set/unset window helpers powerpc/powernv/ioda2: Export debug helper pe_level_printk() ...
2016-05-11perf/powerpc: Add support for unwinding perf-stackdumpChandan Kumar2-0/+97
Adds support for unwinding user stack dump by linking with libunwind. Signed-off-by: Chandan Kumar <[email protected]> Reviewed-by: Naveen N. Rao <[email protected]> Tested-by: Naveen N. Rao <[email protected]> Acked-by: Arnaldo Carvalho de Melo <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2016-05-05perf symbols: Fix kallsyms perf test on ppc64leNaveen N. Rao1-8/+20
ppc64le functions have a Global Entry Point (GEP) and a Local Entry Point (LEP). While placing a probe, we always prefer the LEP since it catches function calls through both the GEP and the LEP. In order to do this, we fixup the function entry points during elf symbol table lookup to point to the LEPs. This works, but breaks 'perf test kallsyms' since the symbols loaded from the symbol table (pointing to the LEP) do not match the symbols in kallsyms. To fix this, we do not adjust all the symbols during symbol table load. Instead, we note down st_other in a newly introduced arch-specific member of perf symbol structure, and later use this to adjust the probe trace point. Reported-by: Michael Ellerman <[email protected]> Signed-off-by: Naveen N. Rao <[email protected]> Acked-by: Ananth N Mavinakayanahalli <[email protected]> Acked-by: Balbir Singh <[email protected]> Cc: Mark Wielaard <[email protected]> Cc: Masami Hiramatsu <[email protected]> Cc: Thiago Jung Bauermann <[email protected]> Cc: [email protected] Link: http://lkml.kernel.org/r/6be7c2b17e370100c2f79dd444509df7929bdd3e.1460451721.git.naveen.n.rao@linux.vnet.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2016-05-05perf powerpc: Fix kprobe and kretprobe handling with kallsyms on ppc64leNaveen N. Rao1-5/+14
So far, we used to treat probe point offsets as being offset from the LEP. However, userspace applications (objdump/readelf) always show disassembly and offsets from the function GEP. This is confusing to the user as we will end up probing at an address different from what the user expects when looking at the function disassembly with readelf/objdump. Fix this by changing how we modify probe address with perf. If only the function name is provided, we assume the user needs the LEP. Otherwise, if an offset is specified, we assume that the user knows the exact address to probe based on function disassembly, and so we just place the probe from the GEP offset. Finally, kretprobe was also broken with kallsyms as we were trying to specify an offset. This patch also fixes that issue. Reported-by: Ananth N Mavinakayanahalli <[email protected]> Signed-off-by: Naveen N. Rao <[email protected]> Acked-by: Balbir Singh <[email protected]> Cc: Mark Wielaard <[email protected]> Cc: Masami Hiramatsu <[email protected]> Cc: Michael Ellerman <[email protected]> Cc: Thiago Jung Bauermann <[email protected]> Cc: [email protected] Link: http://lkml.kernel.org/r/75df860aad8216bf4b9bcd10c6351ecc0e3dee54.1460451721.git.naveen.n.rao@linux.vnet.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2016-05-05perf tools powerpc: Add support for generating bpf prologueNaveen N. Rao2-12/+29
Generalize existing macros to serve the purpose. Signed-off-by: Naveen N. Rao <[email protected]> Cc: Ian Munsie <[email protected]> Cc: Masami Hiramatsu <[email protected]> Cc: Michael Ellerman <[email protected]> Cc: Wang Nan <[email protected]> Cc: [email protected] Link: http://lkml.kernel.org/r/1462461799-17518-1-git-send-email-naveen.n.rao@linux.vnet.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2016-04-21tool/perf: Add sample_reg_mask to include all perf_regsMadhavan Srinivasan2-0/+50
Add sample_reg_mask array with pt_regs registers. This is needed for printing supported regs ( -I? option). Signed-off-by: Madhavan Srinivasan <[email protected]> Acked-by: Arnaldo Carvalho de Melo <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2016-04-21tools/perf: Map the ID values with register namesAnju T1-0/+69
Map ID values with corresponding register names. These names are then displayed when user issues perf record with the -I option followed by perf report/script with -D option. To test this patchset, Eg: $ perf record -I ls # record machine state at interrupt $ perf script -D # read the perf.data file Sample output obtained for this patch / output looks like as follows: 496768515470 0x1988 [0x188]: PERF_RECORD_SAMPLE(IP, 0x1): 4522/4522: 0xc0000000001e538c period: 1 addr: 0 ... intr regs: mask 0x7ffffffffff ABI 64-bit .... r0 0xc0000000001e5e34 .... r1 0xc000000fe733f9a0 .... r2 0xc000000001523100 .... r3 0xc000000ffaadeb60 .... r4 0xc000000003456800 .... r5 0x73a9b5e000 .... r6 0x1e000000 .... r7 0x0 .... r8 0x0 .... r9 0x0 .... r10 0x1 .... r11 0x0 .... r12 0x24022822 .... r13 0xc00000000feec180 .... r14 0x0 .... r15 0xc000001e4be18800 .... r16 0x0 .... r17 0xc000000ffaac5000 .... r18 0xc000000fe733f8a0 .... r19 0xc000000001523100 .... r20 0xc00000000009fd1c .... r21 0xc000000fcaa69000 .... r22 0xc0000000001e4968 .... r23 0xc000000001523100 .... r24 0xc000000fe733f850 .... r25 0xc000000fcaa69000 .... r26 0xc000000003b8fcf0 .... r27 0xfffffffffffffead .... r28 0x0 .... r29 0xc000000fcaa69000 .... r30 0x1 .... r31 0x0 .... nip 0xc0000000001dd320 .... msr 0x9000000000009032 .... orig_r3 0xc0000000001e538c .... ctr 0xc00000000009d550 .... link 0xc0000000001e5e34 .... xer 0x0 .... ccr 0x84022882 .... softe 0x0 .... trap 0xf01 .... dar 0x0 .... dsisr 0xf00040060000004 ... thread: :4522:4522 ...... dso: /root/.debug/.build-id/b0/ef11b1a1629e62ac9de75199117ee5ef9469e9 :4522 4522 496.768515: 1 cycles: c0000000001e538c .perf_event_context_sched_in (/boot/vmlinux) Signed-off-by: Anju T <[email protected]> Acked-by: Arnaldo Carvalho de Melo <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2016-03-28perf tools: Fix build break on powerpcSukadev Bhattiprolu1-0/+2
Commit 531d2410635c ("perf tools: Do not include stringify.h from the kernel sources") seems to have accidentially removed the inclusion of "util/header.h" from "arch/powerpc/util/header.c". "util/header.h" provides the prototype for get_cpuid() and is needed to build perf on Powerpc: arch/powerpc/util/header.c:17:1: error: no previous prototype for 'get_cpuid' [-Werror=missing-prototypes] Reported-by: Michael Ellerman <[email protected]> Tested-by: Arnaldo Carvalho de Melo <[email protected]> Cc: Stephen Rothwell <[email protected]> Fixes: 531d2410635c ("perf tools: Do not include stringify.h from the kernel sources") Signed-off-by: Sukadev Bhattiprolu <[email protected]> [ Included "util.h" too, to get the scnprintf() prototype ] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2016-03-23perf tools: Do not include stringify.h from the kernel sourcesArnaldo Carvalho de Melo1-3/+1
Use instead the copy just made to tools/include/linux/. Cc: Adrian Hunter <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Wang Nan <[email protected]> Link: http://lkml.kernel.org/n/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2016-03-10perf jitdump: Build only on supported archsJiri Olsa1-0/+1
Build jitdump only on architectures defined in util/genelf.h file, to avoid breaking the build on such arches. Signed-off-by: Jiri Olsa <[email protected]> Cc: Adrian Hunter <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Andi Kleen <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Colin Ian King <[email protected]> Cc: David Ahern <[email protected]> Cc: Davidlohr Bueso <[email protected]> Cc: He Kuang <[email protected]> Cc: Mel Gorman <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Stephane Eranian <[email protected]> Cc: Steven Rostedt <[email protected]> Cc: Wang Nan <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2016-01-29perf kvm/powerpc: Add support for HCALL reasonsHemant Kumar2-1/+187
Powerpc provides hcall events that also provides insights into guest behaviour. Enhance perf kvm stat to record and analyze hcall events. - To trace hcall events : perf kvm stat record - To show the results : perf kvm stat report --event=hcall The result shows the number of hypervisor calls from the guest grouped by their respective reasons displayed with the frequency. This patch makes use of two additional tracepoints "kvm_hv:kvm_hcall_enter" and "kvm_hv:kvm_hcall_exit". To map the hcall codes to their respective names, it needs a mapping. Such mapping is added in this patch in book3s_hcalls.h. # pgrep qemu A sample output : 19378 60515 2 VMs running. # perf kvm stat record -a ^C[ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 4.153 MB perf.data.guest (39624 samples) ] # perf kvm stat report -p 60515 --event=hcall Analyze events for all VMs, all VCPUs: HCALL-EVENT Samples Samples% Time% MinTime MaxTime AvgTime H_IPI 822 66.08% 88.10% 0.63us 11.38us 2.05us (+- 1.42%) H_SEND_CRQ 144 11.58% 3.77% 0.41us 0.88us 0.50us (+- 1.47%) H_VIO_SIGNAL 118 9.49% 2.86% 0.37us 0.83us 0.47us (+- 1.43%) H_PUT_TERM_CHAR 76 6.11% 2.07% 0.37us 0.90us 0.52us (+- 2.43%) H_GET_TERM_CHAR 74 5.95% 2.23% 0.37us 1.70us 0.58us (+- 4.77%) H_RTAS 6 0.48% 0.85% 1.10us 9.25us 2.70us (+-48.57%) H_PERFMON 4 0.32% 0.12% 0.41us 0.96us 0.59us (+-20.92%) Total Samples:1244, Total events handled time:1916.69us. Signed-off-by: Hemant Kumar <[email protected]> Cc: Alexander Yarygin <[email protected]> Cc: David Ahern <[email protected]> Cc: Michael Ellerman <[email protected]> Cc: Naveen N. Rao <[email protected]> Cc: Paul Mackerras <[email protected]> Cc: Scott Wood <[email protected]> Cc: Srikar Dronamraju <[email protected]> Cc: [email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2016-01-29perf kvm/powerpc: Port perf kvm stat to powerpcHemant Kumar4-0/+143
perf kvm can be used to analyze guest exit reasons. This support already exists in x86. Hence, porting it to powerpc. - To trace KVM events : perf kvm stat record If many guests are running, we can track for a specific guest by using --pid as in : perf kvm stat record --pid <pid> - To see the results : perf kvm stat report The result shows the number of exits (from the guest context to host/hypervisor context) grouped by their respective exit reasons with their frequency. Since, different powerpc machines have different KVM tracepoints, this patch discovers the available tracepoints dynamically and accordingly looks for them. If any single tracepoint is not present, this support won't be enabled for reporting. To record, this will fail if any of the events we are looking to record isn't available. Right now, its only supported on PowerPC Book3S_HV architectures. To analyze the different exits, group them and present them (in a slight descriptive way) to the user, we need a mapping between the "exit code" (dumped in the kvm_guest_exit tracepoint data) and to its related Interrupt vector description (exit reason). This patch adds this mapping in book3s_hv_exits.h. It records on two available KVM tracepoints for book3s_hv: "kvm_hv:kvm_guest_exit" and "kvm_hv:kvm_guest_enter". Here is a sample o/p: # pgrep qemu 19378 60515 2 Guests are running on the host. # perf kvm stat record -a ^C[ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 4.153 MB perf.data.guest (39624 samples) ] # perf kvm stat report -p 60515 Analyze events for pid(s) 60515, all VCPUs: VM-EXIT Samples Samples% Time% MinTime MaxTime Avg time SYSCALL 9141 63.67% 7.49% 1.26us 5782.39us 9.87us (+- 6.46%) H_DATA_STORAGE 4114 28.66% 5.07% 1.72us 4597.68us 14.84us (+-20.06%) HV_DECREMENTER 418 2.91% 4.26% 0.70us 30002.22us 122.58us (+-70.29%) EXTERNAL 392 2.73% 0.06% 0.64us 104.10us 1.94us (+-18.83%) RETURN_TO_HOST 287 2.00% 83.11% 1.53us 124240.15us 3486.52us (+-16.81%) H_INST_STORAGE 5 0.03% 0.00% 1.88us 3.73us 2.39us (+-14.20%) Total Samples:14357, Total events handled time:1203918.42us. Signed-off-by: Hemant Kumar <[email protected]> Cc: Alexander Yarygin <[email protected]> Cc: David Ahern <[email protected]> Cc: Michael Ellerman <[email protected]> Cc: Naveen N. Rao <[email protected]> Cc: Paul Mackerras <[email protected]> Cc: Scott Wood <[email protected]> Cc: Srikar Dronamraju <[email protected]> Cc: [email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Srikar Dronamraju <[email protected]> Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2015-05-04perf probe ppc64le: Fixup function entry if using kallsyms lookupNaveen N. Rao1-0/+15
On powerpc ABIv2, if no debug-info is found and we use kallsyms, we need to fixup the function entry to point to the local entry point. Use offset of 8 since current toolchains always generate 2 instructions (8 bytes). Signed-off-by: Naveen N. Rao <[email protected]> Reviewed-by: Srikar Dronamraju <[email protected]> Cc: Ananth N Mavinakayanahalli <[email protected]> Cc: Masami Hiramatsu <[email protected]> Cc: Michael Ellerman <[email protected]> Cc: Sukadev Bhattiprolu <[email protected]> Cc: [email protected] Link: http://lkml.kernel.org/r/92253021e77a104b23b615c8c23bf9501dfe60bf.1430217967.git.naveen.n.rao@linux.vnet.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
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