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2018-12-18perf trace: Add alignment spaces after the closing parensArnaldo Carvalho de Melo1-11/+26
To use strace's style, helping in comparing the output of 'perf trace' with the one from 'strace', to help in upcoming regression tests. Cc: Adrian Hunter <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Luis Cláudio Gonçalves <[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]>
2018-12-18perf trace beauty: Print O_RDONLY when (flags & O_ACCMODE) == 0Arnaldo Carvalho de Melo1-1/+3
And there are more flags, to match strace's output. openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 Also to help with regression tests. Cc: Adrian Hunter <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Luis Cláudio Gonçalves <[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]>
2018-12-18perf trace: Allow asking for not suppressing common string prefixesArnaldo Carvalho de Melo28-86/+142
So far we've been suppressing common stuff such as "MAP_" in the mmap flags, showing "SHARED" instead of "MAP_SHARED", allow for those prefixes (and a few suffixes) to be shown: # trace -e *map,open*,*seek sleep 1 openat("/etc/ld.so.cache", CLOEXEC) = 3 mmap(0, 109093, READ, PRIVATE, 3, 0) = 0x7ff61c695000 openat("/lib64/libc.so.6", CLOEXEC) = 3 lseek(3, 792, SET) = 792 mmap(0, 8192, READ|WRITE, PRIVATE|ANONYMOUS) = 0x7ff61c693000 lseek(3, 792, SET) = 792 lseek(3, 864, SET) = 864 mmap(0, 1857568, READ, PRIVATE|DENYWRITE, 3, 0) = 0x7ff61c4cd000 mmap(0x7ff61c4ef000, 1363968, EXEC|READ, PRIVATE|FIXED|DENYWRITE, 3, 139264) = 0x7ff61c4ef000 mmap(0x7ff61c63c000, 311296, READ, PRIVATE|FIXED|DENYWRITE, 3, 1503232) = 0x7ff61c63c000 mmap(0x7ff61c689000, 24576, READ|WRITE, PRIVATE|FIXED|DENYWRITE, 3, 1814528) = 0x7ff61c689000 mmap(0x7ff61c68f000, 14368, READ|WRITE, PRIVATE|FIXED|ANONYMOUS) = 0x7ff61c68f000 munmap(0x7ff61c695000, 109093) = 0 openat("/usr/lib/locale/locale-archive", CLOEXEC) = 3 mmap(0, 217749968, READ, PRIVATE, 3, 0) = 0x7ff60f523000 # # vim ~/.perfconfig # # perf config llvm.dump-obj=true trace.add_events=/home/acme/git/perf/tools/perf/examples/bpf/augmented_raw_syscalls.o trace.show_zeros=yes trace.show_duration=no trace.no_inherit=yes trace.show_timestamp=no trace.show_arg_names=no trace.args_alignment=0 trace.string_quote=" trace.show_prefix=yes # # # trace -e *map,open*,*seek sleep 1 openat(AT_FDCWD, "/etc/ld.so.cache", O_CLOEXEC) = 3 mmap(0, 109093, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f7ebbe59000 openat(AT_FDCWD, "/lib64/libc.so.6", O_CLOEXEC) = 3 lseek(3, 792, SEEK_SET) = 792 mmap(0, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS) = 0x7f7ebbe57000 lseek(3, 792, SEEK_SET) = 792 lseek(3, 864, SEEK_SET) = 864 mmap(0, 1857568, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f7ebbc91000 mmap(0x7f7ebbcb3000, 1363968, PROT_EXEC|PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 139264) = 0x7f7ebbcb3000 mmap(0x7f7ebbe00000, 311296, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 1503232) = 0x7f7ebbe00000 mmap(0x7f7ebbe4d000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 1814528) = 0x7f7ebbe4d000 mmap(0x7f7ebbe53000, 14368, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS) = 0x7f7ebbe53000 munmap(0x7f7ebbe59000, 109093) = 0 openat(AT_FDCWD, "/usr/lib/locale/locale-archive", O_CLOEXEC) = 3 mmap(0, 217749968, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f7eaece7000 # Cc: Adrian Hunter <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Luis Cláudio Gonçalves <[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]>
2018-12-18perf trace: Add a prefix member to the strarray classArnaldo Carvalho de Melo12-31/+35
So that the user, in an upcoming patch, can select printing it to get the full string as used in the source code, not one with a common prefix chopped off so as to make the output more compact. Cc: Adrian Hunter <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Luis Cláudio Gonçalves <[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]>
2018-12-18perf trace: Enclose strings with double quotesArnaldo Carvalho de Melo1-1/+1
To match 'strace' output, helping with upcoming regression tests comparing both outputs. Cc: Adrian Hunter <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Luis Cláudio Gonçalves <[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]>
2018-12-18perf trace: Make the alignment of the syscall args be configurableArnaldo Carvalho de Melo2-3/+13
Since the start 'perf trace' aligns the parens enclosing the list of syscall args to align the syscall results, allow this to be configurable, keeping the default of 70. Using: # perf config llvm.dump-obj=true trace.add_events=/home/acme/git/perf/tools/perf/examples/bpf/augmented_raw_syscalls.o trace.show_zeros=yes trace.show_duration=no trace.no_inherit=yes trace.show_timestamp=no trace.show_arg_names=no trace.args_alignment=0 # trace -e open*,close,*sleep sleep 1 openat(CWD, /etc/ld.so.cache, CLOEXEC) = 3 close(3) = 0 openat(CWD, /lib64/libc.so.6, CLOEXEC) = 3 close(3) = 0 openat(CWD, /usr/lib/locale/locale-archive, CLOEXEC) = 3 close(3) = 0 nanosleep(0x7ffc00de66f0, 0) = 0 close(1) = 0 close(2) = 0 # Cc: Adrian Hunter <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Luis Cláudio Gonçalves <[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]>
2018-12-18Merge branch 'master' of ↵David S. Miller2-1/+304
git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next Steffen Klassert says: ==================== pull request (net-next): ipsec-next 2018-12-18 1) Add xfrm policy selftest scripts. From Florian Westphal. 2) Split inexact policies into four different search list classes and use the rbtree infrastructure to store/lookup the policies. This is to improve the policy lookup performance after the flowcache removal. Patches from Florian Westphal. 3) Various coding style fixes, from Colin Ian King. 4) Fix policy lookup logic after adding the inexact policy search tree infrastructure. From Florian Westphal. 5) Remove a useless remove BUG_ON from xfrm6_dst_ifdown. From Li RongQing. 6) Use the correct policy direction for lookups on hash rebuilding. From Florian Westphal. Please pull or let me know if there are problems. ==================== Signed-off-by: David S. Miller <[email protected]>
2018-12-18Merge branch 'turbostat' of ↵Rafael J. Wysocki1-83/+106
git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux Pull turbostat utility updates for v4.21 from Len Brown: "A couple of random fixes that were sitting in the queue." * 'turbostat' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux: tools/power turbostat: consolidate duplicate model numbers tools/power turbostat: fix goldmont C-state limit decoding tools/power turbostat: reduce debug output tools/power turbosat: fix AMD APIC-id output
2018-12-18perf trace: Allow suppressing the syscall argument namesArnaldo Carvalho de Melo2-4/+22
To show just the values: Default: # trace -e open*,close,*sleep sleep 1 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC ) = 3 close(fd: 3 ) = 0 openat(dfd: CWD, filename: /lib64/libc.so.6, flags: CLOEXEC ) = 3 close(fd: 3 ) = 0 openat(dfd: CWD, filename: /usr/lib/locale/locale-archive, flags: CLOEXEC) = 3 close(fd: 3 ) = 0 nanosleep(rqtp: 0x7ffc0c4ea0d0, rmtp: 0 ) = 0 close(fd: 1 ) = 0 close(fd: 2 ) = 0 # Remove it: # perf config trace.show_arg_names=no # trace -e open*,close,*sleep sleep 1 openat(CWD, /etc/ld.so.cache, CLOEXEC ) = 3 close(3 ) = 0 openat(CWD, /lib64/libc.so.6, CLOEXEC ) = 3 close(3 ) = 0 openat(CWD, /usr/lib/locale/locale-archive, CLOEXEC ) = 3 close(3 ) = 0 nanosleep(0x7ffced3a8c40, 0 ) = 0 close(1 ) = 0 close(2 ) = 0 # Cc: Adrian Hunter <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Luis Cláudio Gonçalves <[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]>
2018-12-18perf trace: Allow configuring if the syscall start timestamp should be printedArnaldo Carvalho de Melo2-1/+11
# trace -e open*,close,*sleep sleep 1 0.000 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC ) = 3 0.016 close(fd: 3 ) = 0 0.024 openat(dfd: CWD, filename: /lib64/libc.so.6, flags: CLOEXEC ) = 3 0.074 close(fd: 3 ) = 0 0.235 openat(dfd: CWD, filename: /usr/lib/locale/locale-archive, flags: CLOEXEC) = 3 0.251 close(fd: 3 ) = 0 0.285 nanosleep(rqtp: 0x7ffd68e6d620, rmtp: 0 ) = 0 1000.386 close(fd: 1 ) = 0 1000.395 close(fd: 2 ) = 0 # # perf config trace.show_timestamp=no # trace -e open*,close,*sleep sleep 1 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC ) = 3 close(fd: 3 ) = 0 openat(dfd: CWD, filename: /lib64/libc.so.6, flags: CLOEXEC ) = 3 close(fd: 3 ) = 0 openat(dfd: CWD, filename: , flags: CLOEXEC ) = 3 close(fd: 3 ) = 0 nanosleep(rqtp: 0x7fffa79c38e0, rmtp: 0 ) = 0 close(fd: 1 ) = 0 close(fd: 2 ) = 0 # Cc: Adrian Hunter <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Luis Cláudio Gonçalves <[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]>
2018-12-18perf trace: Allow configuring default for perf_event_attr.inheritArnaldo Carvalho de Melo2-0/+5
I.f. if children should inherit the parent perf_event configuration, i.e. if we should trace children as well or just the parent. The default is to follow children, to disable this and have a behaviour similar to strace, set this config option or use the --no_inherit 'perf trace' option. E.g.: Default: # perf config trace.no_inherit # trace -e clone,*sleep time sleep 1 0.000 time/21107 clone(clone_flags: CHILD_CLEARTID|CHILD_SETTID|0x11, newsp: 0, child_tidptr: 0x7f7b8f9ae810) = 21108 (time) ? time/21108 ... [continued]: clone() 0.691 sleep/21108 nanosleep(rqtp: 0x7ffed01d0540, rmtp: 0 ) = 0 0.00user 0.00system 0:01.00elapsed 0%CPU (0avgtext+0avgdata 1988maxresident)k 0inputs+0outputs (0major+76minor)pagefaults 0swaps # Disable it: # trace -e clone,*sleep time sleep 1 0.000 clone(clone_flags: CHILD_CLEARTID|CHILD_SETTID|0x11, newsp: 0, child_tidptr: 0x7ff41e100810) = 21414 (time) 0.00user 0.00system 0:01.00elapsed 0%CPU (0avgtext+0avgdata 1964maxresident)k 0inputs+0outputs (0major+76minor)pagefaults 0swaps # Notice that since there is just one thread, the "comm/TID" column is suppressed. Cc: Adrian Hunter <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Luis Cláudio Gonçalves <[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]>
2018-12-18perf config: Show the configuration when no arguments are providedArnaldo Carvalho de Melo1-4/+3
More convenient thah having to recall what letter is about showing/listing/dumping the configuration, i.e. no arguments means -l/--list: # perf config llvm.dump-obj=true trace.default_events=/home/acme/git/perf/tools/perf/examples/bpf/augmented_raw_syscalls.o trace.show_zeros=yes trace.show_duration=no # perf config -l llvm.dump-obj=true trace.default_events=/home/acme/git/perf/tools/perf/examples/bpf/augmented_raw_syscalls.o trace.show_zeros=yes trace.show_duration=no # perf config -h Usage: perf config [<file-option>] [options] [section.name[=value] ...] -l, --list show current config variables --system use system config file --user use user config file # Cc: Adrian Hunter <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Luis Cláudio Gonçalves <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Taeung Song <[email protected]> Cc: Wang Nan <[email protected]> Link: https://lkml.kernel.org/n/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2018-12-18perf trace: Allow configuring if the syscall duration should be printedArnaldo Carvalho de Melo2-2/+11
# perf config trace.show_duration=no # perf config -l | grep trace trace.default_events=/home/acme/git/perf/tools/perf/examples/bpf/augmented_raw_syscalls.o trace.show_zeros=true trace.show_duration=no # trace -e *sleep sleep 1 0.000 sleep/8729 nanosleep(rqtp: 0x7ffcb0b4c940, rmtp: 0) = 0 # perf config trace.show_duration=yes # trace -e *sleep sleep 1 0.000 (1000.212 ms): sleep/8735 nanosleep(rqtp: 0x7ffca15fa770, rmtp: 0) = 0 # Cc: Adrian Hunter <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Luis Cláudio Gonçalves <[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]>
2018-12-18perf trace: Allow configuring if zeroed syscall args should be printedArnaldo Carvalho de Melo2-1/+7
The default so far, since we show argument names followed by its values, was to make the output more compact by suppressing most zeroed args. Make this configurable so that users can choose what best suit their needs. Cc: Adrian Hunter <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Luis Cláudio Gonçalves <[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]>
2018-12-18perf trace: Allow specifying a set of events to add in perfconfigArnaldo Carvalho de Melo2-0/+28
To add augmented_raw_syscalls to the events speficied by the user, or be the only one if no events were specified by the user, one can add this to perfconfig: # cat ~/.perfconfig [trace] add_events = /home/acme/git/perf/tools/perf/examples/bpf/augmented_raw_syscalls.o # I.e. pre-compile the augmented_raw_syscalls.c BPF program and make it always load, this way: # perf trace -e open* cat /etc/passwd > /dev/null 0.000 ( 0.013 ms): cat/31557 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC) = 3 0.035 ( 0.007 ms): cat/31557 openat(dfd: CWD, filename: /lib64/libc.so.6, flags: CLOEXEC) = 3 0.353 ( 0.009 ms): cat/31557 openat(dfd: CWD, filename: /usr/lib/locale/locale-archive, flags: CLOEXEC) = 3 0.424 ( 0.006 ms): cat/31557 openat(dfd: CWD, filename: /etc/passwd) = 3 # Cc: Adrian Hunter <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Luis Cláudio Gonçalves <[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]>
2018-12-18perf augmented_raw_syscalls: Do not include stdio.hArnaldo Carvalho de Melo1-1/+0
We're not using that puts() thing, and thus we don't need to define the __bpf_stdout__ map, reducing the setup time. Cc: Adrian Hunter <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Luis Cláudio Gonçalves <[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]>
2018-12-18perf cs-etm: Generate branch sample for exception packetLeo Yan3-8/+50
The exception packet appears as one element with 'elem_type' == OCSD_GEN_TRC_ELEM_EXCEPTION or OCSD_GEN_TRC_ELEM_EXCEPTION_RET, which is present for exception entry and exit respectively. The decoder sets the packet fields 'packet->exc' and 'packet->exc_ret' to indicate the exception packets; but exception packets don't have a dedicated sample type and shares the same sample type CS_ETM_RANGE with normal instruction packets. As a result, the exception packets are taken as normal instruction packets and this introduces confusion in mixing different packet types. Furthermore, these instruction range packets will be processed for branch samples only when 'packet->last_instr_taken_branch' is true, otherwise they will be omitted, this can introduce a mess for exception and exception returning due to not having the complete address range info for context switching. To process exception packets properly, this patch introduces two new sample types: CS_ETM_EXCEPTION and CS_ETM_EXCEPTION_RET; these two types of packets will be handled by cs_etm__exception(). The function cs_etm__exception() forces setting the previous CS_ETM_RANGE packet flag 'prev_packet->last_instr_taken_branch' to true, this matches well with the program flow when the exception is trapped from user space to kernel space, no matter if the most recent flow has branch taken or not; this is also safe for returning to user space after exception handling. After exception packets have their own sample type, the packet fields 'packet->exc' and 'packet->exc_ret' aren't needed anymore, so remove them. Signed-off-by: Leo Yan <[email protected]> Reviewed-by: Mathieu Poirier <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Mike Leach <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Robert Walker <[email protected]> Cc: coresight ml <[email protected]> Cc: [email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2018-12-18perf cs-etm: Treat EO_TRACE element as trace discontinuityLeo Yan1-1/+1
If the decoder outputs an EO_TRACE element, it means the end of the trace buffer; this is a discontinuity and in this case the end of trace data needs to be saved. This patch generates a CS_ETM_DISCONTINUITY packet for the EO_TRACE element hereby flushing the end of trace data in cs-etm.c. Signed-off-by: Leo Yan <[email protected]> Reviewed-by: Mathieu Poirier <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Mike Leach <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Robert Walker <[email protected]> Cc: [email protected] Cc: [email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2018-12-18perf cs-etm: Treat NO_SYNC element as trace discontinuityLeo Yan1-1/+0
The CoreSight tracer driver might insert barrier packets between different buffers, thus the decoder can spot the boundaries based on the barrier packet; it is possible for the decoder to hit a barrier packet and emit a NO_SYNC element, then the decoder will find a periodic synchronisation point inside that next trace block that starts the trace again but does not have the TRACE_ON element as indicator - usually because this trace block has wrapped the buffer so we have lost the original point when the trace was enabled. In the first case it causes the insertion of a OCSD_GEN_TRC_ELEM_NO_SYNC in the middle of the tracing stream, but as we were not handling the NO_SYNC element properly this ends up making users miss the discontinuity indications. Though OCSD_GEN_TRC_ELEM_NO_SYNC is different from CS_ETM_TRACE_ON when output from the decoder, both indicate that the trace data is discontinuous; this patch treats OCSD_GEN_TRC_ELEM_NO_SYNC as a trace discontinuity and generates a CS_ETM_DISCONTINUITY packet for it, so cs-etm can handle the discontinuity for this case, finally it saves the last trace data for the previous trace block and restart samples for the new block. Signed-off-by: Leo Yan <[email protected]> Reviewed-by: Mathieu Poirier <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Mike Leach <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Robert Walker <[email protected]> Cc: coresight ml <[email protected]> Cc: [email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2018-12-18perf cs-etm: Rename CS_ETM_TRACE_ON to CS_ETM_DISCONTINUITYLeo Yan3-12/+12
TRACE_ON element is used at the beginning of trace, it also can be appeared in the middle of trace data to indicate discontinuity; for example, it's possible to see multiple TRACE_ON elements in the trace stream if the trace is being limited by address range filtering. Furthermore, except TRACE_ON element is for discontinuity, NO_SYNC and EO_TRACE also can be used to indicate discontinuity, though they are used for different scenarios for which the trace is interrupted. This patch renames sample type CS_ETM_TRACE_ON to CS_ETM_DISCONTINUITY, firstly the new name describes more closely the purpose of the packet; secondly this is a preparation for other output elements which also cause the trace discontinuity thus they can share the same one packet type. Signed-off-by: Leo Yan <[email protected]> Reviewed-by: Mathieu Poirier <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Mike Leach <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Robert Walker <[email protected]> Cc: [email protected] Cc: [email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2018-12-18perf cs-etm: Refactor enumeration cs_etm_sample_typeLeo Yan1-3/+3
The values in enumeration cs_etm_sample_type are defined with setting bit N for each packet type, this is not suggested in the usual case. This patch refactor cs_etm_sample_type by converting from bit shifting values to continuous numbers. Signed-off-by: Leo Yan <[email protected]> Reviewed-by: Mathieu Poirier <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Mike Leach <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Robert Walker <[email protected]> Cc: [email protected] Cc: [email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2018-12-18perf cs-etm: Remove unused 'trace_on' in cs_etm_decoderLeo Yan1-3/+0
cs_etm_decoder::trace_on is being assigned when TRACE_ON or NO_SYNC element is coming, but it is never used hence it is redundant and can be removed. So let's remove 'trace_on' field from cs_etm_decoder struct. Suggested-by: Mathieu Poirier <[email protected]> Signed-off-by: Leo Yan <[email protected]> Reviewed-by: Mathieu Poirier <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Mathieu Poirier <[email protected]> Cc: Mike Leach <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Robert Walker <[email protected]> Cc: [email protected] Cc: [email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2018-12-18perf cs-etm: Avoid stale branch samples when flush packetLeo Yan1-1/+34
At the end of trace buffer handling, function cs_etm__flush() is invoked to flush any remaining branch stack entries. As a side effect, it also generates branch sample, because the 'etmq->packet' doesn't contains any new coming packet but point to one stale packet after packets swapping, so it wrongly makes synthesize branch samples with stale packet info. We could review below detailed flow which causes issue: Packet1: start_addr=0xffff000008b1fbf0 end_addr=0xffff000008b1fbfc Packet2: start_addr=0xffff000008b1fb5c end_addr=0xffff000008b1fb6c step 1: cs_etm__sample(): sample: ip=(0xffff000008b1fbfc-4) addr=0xffff000008b1fb5c step 2: flush packet in cs_etm__run_decoder(): cs_etm__run_decoder() `-> err = cs_etm__flush(etmq, false); sample: ip=(0xffff000008b1fb6c-4) addr=0xffff000008b1fbf0 Packet1 and packet2 are two continuous packets, when packet2 is the new coming packet, cs_etm__sample() generates branch sample for these two packets and use [packet1::end_addr - 4 => packet2::start_addr] as branch jump flow, thus we can see the first generated branch sample in step 1. At the end of cs_etm__sample() it swaps packets so 'etm->prev_packet'= packet2 and 'etm->packet'=packet1, so far it's okay for branch sample. If packet2 is the last one packet in trace buffer, even there have no any new coming packet, cs_etm__run_decoder() invokes cs_etm__flush() to flush branch stack entries as expected, but it also generates branch samples by taking 'etm->packet' as a new coming packet, thus the branch jump flow is as [packet2::end_addr - 4 => packet1::start_addr]; this is the second sample which is generated in step 2. So actually the second sample is a stale sample and we should not generate it. This patch introduces a new function cs_etm__end_block(), at the end of trace block this function is invoked to only flush branch stack entries and thus can avoid to generate branch sample for stale packet. Signed-off-by: Leo Yan <[email protected]> Reviewed-by: Mathieu Poirier <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Mike Leach <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Robert Walker <[email protected]> Cc: [email protected] Cc: [email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2018-12-18perf cs-etm: Correct packets swapping in cs_etm__flush()Leo Yan1-1/+1
The structure cs_etm_queue uses 'prev_packet' to point to previous packet, this can be used to combine with new coming packet to generate samples. In function cs_etm__flush() it swaps packets only when the flag 'etm->synth_opts.last_branch' is true, this means that it will not swap packets if without option '--itrace=il' to generate last branch entries; thus for this case the 'prev_packet' doesn't point to the correct previous packet and the stale packet still will be used to generate sequential sample. Thus if dump trace with 'perf script' command we can see the incorrect flow with the stale packet's address info. This patch corrects packets swapping in cs_etm__flush(); except using the flag 'etm->synth_opts.last_branch' it also checks the another flag 'etm->sample_branches', if any flag is true then it swaps packets so can save correct content to 'prev_packet'. Finally this can fix the wrong program flow dumping issue. The patch has a minor refactoring to use 'etm->synth_opts.last_branch' instead of 'etmq->etm->synth_opts.last_branch' for condition checking, this is consistent with that is done in cs_etm__sample(). Signed-off-by: Leo Yan <[email protected]> Reviewed-by: Mathieu Poirier <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Mike Leach <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Robert Walker <[email protected]> Cc: [email protected] Cc: [email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2018-12-18perf trace: Switch to using a struct for the aumented_raw_syscalls syscalls ↵Arnaldo Carvalho de Melo1-2/+11
map values We'll start adding more perf-syscall stuff, so lets do this prep step so that the next ones are just about adding more fields. Cc: Adrian Hunter <[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]>
2018-12-18perf augmented_syscalls: Switch to using a struct for the syscalls map valuesArnaldo Carvalho de Melo1-7/+11
We'll start adding more perf-syscall stuff, so lets do this prep step so that the next ones are just about adding more fields. Run it with the .c file once to cache the .o file: # trace --filter-pids 2834,2199 -e openat,augmented_raw_syscalls.c LLVM: dumping augmented_raw_syscalls.o 0.000 ( 0.021 ms): tmux: server/4952 openat(dfd: CWD, filename: /proc/5691/cmdline ) = 11 349.807 ( 0.040 ms): DNS Res~er #39/11082 openat(dfd: CWD, filename: /etc/hosts, flags: CLOEXEC ) = 44 4988.759 ( 0.052 ms): gsd-color/2431 openat(dfd: CWD, filename: /etc/localtime ) = 18 4988.976 ( 0.029 ms): gsd-color/2431 openat(dfd: CWD, filename: /etc/localtime ) = 18 ^C[root@quaco bpf]# From now on, we can use just the newly built .o file, skipping the compilation step for a faster startup: # trace --filter-pids 2834,2199 -e openat,augmented_raw_syscalls.o 0.000 ( 0.046 ms): DNS Res~er #39/11088 openat(dfd: CWD, filename: /etc/hosts, flags: CLOEXEC ) = 44 1946.408 ( 0.190 ms): systemd/1 openat(dfd: CWD, filename: /proc/1071/cgroup, flags: CLOEXEC ) = 20 1946.792 ( 0.215 ms): systemd/1 openat(dfd: CWD, filename: /proc/954/cgroup, flags: CLOEXEC ) = 20 ^C# Now on to do the same in the builtin-trace.c side of things. Cc: Adrian Hunter <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Namhyung Kim <[email protected]> Link: https://lkml.kernel.org/n/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2018-12-18perf bpf: Move perf_event_output() from stdio.h to bpf.hArnaldo Carvalho de Melo2-3/+2
So that we don't always carry that __bpf_output__ map, leaving that to the scripts wanting to use that facility. 'perf trace' will be changed to look if that map is present and only setup the bpf-output events if so. Cc: Adrian Hunter <[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]>
2018-12-18perf trace: Implement syscall filtering in augmented_syscallsArnaldo Carvalho de Melo2-1/+91
Just another map, this time an BPF_MAP_TYPE_ARRAY, stating with one bool per syscall, stating if it should be filtered or not. So, with a pre-built augmented_raw_syscalls.o file, we use: # perf trace -e open*,augmented_raw_syscalls.o 0.000 ( 0.016 ms): DNS Res~er #37/29652 openat(dfd: CWD, filename: /etc/hosts, flags: CLOEXEC ) = 138 187.039 ( 0.048 ms): gsd-housekeepi/2436 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC ) = 11 187.348 ( 0.041 ms): gsd-housekeepi/2436 openat(dfd: CWD, filename: /proc/self/mountinfo, flags: CLOEXEC ) = 11 188.793 ( 0.036 ms): gsd-housekeepi/2436 openat(dfd: CWD, filename: /proc/self/mountinfo, flags: CLOEXEC ) = 11 189.803 ( 0.029 ms): gsd-housekeepi/2436 openat(dfd: CWD, filename: /proc/self/mountinfo, flags: CLOEXEC ) = 11 190.774 ( 0.027 ms): gsd-housekeepi/2436 openat(dfd: CWD, filename: /proc/self/mountinfo, flags: CLOEXEC ) = 11 284.620 ( 0.149 ms): DataStorage/3076 openat(dfd: CWD, filename: /home/acme/.mozilla/firefox/ina67tev.default/SiteSecurityServiceState.txt, flags: CREAT|TRUNC|WRONLY, mode: IRUGO|IWUSR|IWGRP) = 167 ^C# What is it that this gsd-housekeeping thingy needs to open /proc/self/mountinfo four times periodically? :-) This map will be extended to tell per-syscall parameters, i.e. how many bytes to copy per arg, using the function signature to get the types and then the size of those types, via BTF. Cc: Adrian Hunter <[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]>
2018-12-18perf trace: Avoid using raw_syscalls in duplicity with eBPF augmentationArnaldo Carvalho de Melo1-6/+10
So when we do something like: # perf trace -e open*,augmented_raw_syscalls.o We need to set trace->trace_syscalls because there is logic that use that when mixing strace-like output with other events, such as scheduler tracepoints, but with that set we ended up having multiple raw_syscalls:sys_{enter,exit} setup, which garbled the output, so check if trace->augmented_raw_syscalls is set and avoid the two extra tracepoints. Cc: Adrian Hunter <[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]>
2018-12-18perf trace: Rename set_ev_qualifier_filter to clarify its a tracepoint filterArnaldo Carvalho de Melo1-1/+6
Rename it to trace__set_ev_qualifier_tp_filter(), as this just sets up tracepoint filters on the raw_syscalls:sys_{enter,exit} tracepoints, and since we're going to do the same for the augmented_raw_syscalls codepath, when used, rename it to clarify. Cc: Adrian Hunter <[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]>
2018-12-18perf tools: Link libperf-jvmti.so with LDFLAGS variableJiri Olsa1-1/+1
So we could propagate distro flags into libperf-jvmti.so library. Signed-off-by: Jiri Olsa <[email protected]> Cc: Alexander Shishkin <[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]>
2018-12-18tools lib traceevent: Use LDFLAGS in the build commandsJiri Olsa1-2/+2
So that the user can specify outside LDFLAGS values. Keeping the CFLAGS in there as well, so we don't break existing scripts. Signed-off-by: Jiri Olsa <[email protected]> Acked-by: Steven Rostedt (VMware) <[email protected]> Cc: Herton Krzesinski <[email protected]> Cc: Tzvetomir Stoyanov (VMware) <[email protected]> Link: http://lkml.kernel.org/r/20181212091214.GC17489@krava Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2018-12-18perf tools: Cast off_t to s64 to avoid warning on bionic libcArnaldo Carvalho de Melo1-1/+1
To avoid this warning: CC /tmp/build/perf/util/s390-cpumsf.o util/s390-cpumsf.c: In function 's390_cpumsf_samples': util/s390-cpumsf.c:508:3: warning: format '%llx' expects argument of type 'long long unsigned int', but argument 4 has type 'off_t' [-Wformat=] pr_err("[%#08" PRIx64 "] Invalid AUX trailer entry TOD clock base\n", ^ Now the various Android cross toolchains used in the perf tools container test builds are all clean and we can remove this: export EXTRA_MAKE_ARGS="WERROR=0" Cc: Adrian Hunter <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Thomas Richter <[email protected]> Link: https://lkml.kernel.org/n/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2018-12-18perf tools: Add missing open_memstream() prototype for systems lacking itArnaldo Carvalho de Melo2-0/+5
There are systems such as the Android NDK API level 24 has the open_memstream() function but doesn't provide a prototype, adding noise to the build: builtin-timechart.c: In function 'cat_backtrace': builtin-timechart.c:486:2: warning: implicit declaration of function 'open_memstream' [-Wimplicit-function-declaration] FILE *f = open_memstream(&p, &p_len); ^ builtin-timechart.c:486:2: warning: nested extern declaration of 'open_memstream' [-Wnested-externs] builtin-timechart.c:486:12: warning: initialization makes pointer from integer without a cast FILE *f = open_memstream(&p, &p_len); ^ Define a LACKS_OPEN_MEMSTREAM_PROTOTYPE define so that code needing that can get a prototype. Checked in the bionic git repo to be available since level 23: https://android.googlesource.com/platform/bionic/+/master/libc/include/stdio.h#241 FILE* open_memstream(char** __ptr, size_t* __size_ptr) __INTRODUCED_IN(23); Cc: Adrian Hunter <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Namhyung Kim <[email protected]> Link: https://lkml.kernel.org/n/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2018-12-18perf header: Fix up argument to ctime()Arnaldo Carvalho de Melo1-1/+3
Reducing this noise when cross building to the Android NDK: util/header.c: In function 'perf_header__fprintf_info': util/header.c:2710:45: warning: pointer targets in passing argument 1 of 'ctime' differ in signedness [-Wpointer-sign] fprintf(fp, "# captured on : %s", ctime(&st.st_ctime)); ^ In file included from util/../perf.h:5:0, from util/evlist.h:11, from util/header.c:22: /opt/android-ndk-r15c/platforms/android-26/arch-arm/usr/include/time.h:81:14: note: expected 'const time_t *' but argument is of type 'long unsigned int *' extern char* ctime(const time_t*) __LIBC_ABI_PUBLIC__; ^ Cc: Adrian Hunter <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Namhyung Kim <[email protected]> Link: https://lkml.kernel.org/n/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2018-12-18perf tools: Add missing sigqueue() prototype for systems lacking itArnaldo Carvalho de Melo2-0/+5
There are systems such as the Android NDK API level 24 has the sigqueue() function but doesn't provide a prototype, adding noise to the build: util/evlist.c: In function 'perf_evlist__prepare_workload': util/evlist.c:1494:4: warning: implicit declaration of function 'sigqueue' [-Wimplicit-function-declaration] if (sigqueue(getppid(), SIGUSR1, val)) ^ util/evlist.c:1494:4: warning: nested extern declaration of 'sigqueue' [-Wnested-externs] Define a LACKS_SIGQUEUE_PROTOTYPE define so that code needing that can get a prototype. Checked in the bionic git repo to be available since level 23: https://android.googlesource.com/platform/bionic/+/master/libc/include/signal.h#123 int sigqueue(pid_t __pid, int __signal, const union sigval __value) __INTRODUCED_IN(23); Cc: Adrian Hunter <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Namhyung Kim <[email protected]> Link: https://lkml.kernel.org/n/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2018-12-18tools lib subcmd: Don't add the kernel sources to the include pathArnaldo Carvalho de Melo1-2/+0
At some point we decided not to directly include kernel sources files when building tools/perf/, but when tools/lib/subcmd/ was forked from tools/perf it somehow ended up adding it via these two lines in its Makefile: CFLAGS += -I$(srctree)/include/uapi CFLAGS += -I$(srctree)/include As $(srctree) points to the kernel sources. Removing those lines and keeping just: CFLAGS += -I$(srctree)/tools/include/ Is enough to build tools/perf and tools/objtool. This fixes the build when building from the sources in environments such as the Android NDK crossbuilding from a fedora:26 system: subcmd-util.h:11:15: error: expected ',' or ';' before 'void' static inline void report(const char *prefix, const char *err, va_list params) ^ In file included from /git/perf/include/uapi/linux/stddef.h:2:0, from /git/perf/include/uapi/linux/posix_types.h:5, from /opt/android-ndk-r12b/platforms/android-24/arch-arm/usr/include/sys/types.h:36, from /opt/android-ndk-r12b/platforms/android-24/arch-arm/usr/include/unistd.h:33, from run-command.c:2: subcmd-util.h:18:17: error: '__no_instrument_function__' attribute applies only to functions The /opt/android-ndk-r12b/platforms/android-24/arch-arm/usr/include/sys/types.h file that includes linux/posix_types.h ends up getting the one in the kernel sources causing the breakage. Fix it. Test built tools/objtool/ too. Reported-by: Jiri Olsa <[email protected]> Tested-by: Jiri Olsa <[email protected]> Cc: Adrian Hunter <[email protected]> Cc: Josh Poimboeuf <[email protected]> Cc: Namhyung Kim <[email protected]> Fixes: 4b6ab94eabe4 ("perf subcmd: Create subcmd library") Link: https://lkml.kernel.org/n/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2018-12-18perf trace beauty: renameat's newdirfd may also be AT_FDCWDArnaldo Carvalho de Melo1-1/+2
Noticed while working on renameat2. Cc: Adrian Hunter <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Namhyung Kim <[email protected]> Link: https://lkml.kernel.org/n/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2018-12-18perf trace: Beautify renameat2's flags argumentArnaldo Carvalho de Melo4-1/+25
# strace -e renameat2 -f perf trace -e rename* mv c /tmp strace: Process 10824 attached [pid 10824] renameat2(AT_FDCWD, "c", AT_FDCWD, "/tmp", RENAME_NOREPLACE) = -1 EXDEV (Invalid cross-device link) [pid 10824] renameat2(AT_FDCWD, "c", AT_FDCWD, "/tmp/c", RENAME_NOREPLACE) = -1 EEXIST (File exists) 1.857 ( 0.008 ms): mv/10824 renameat2(olddfd: CWD, oldname: 0x7ffc72ff3d81, newdfd: CWD, newname: 0x7ffc72ff3d83, flags: NOREPLACE) = -1 EXDEV Invalid cross-device link 2.002 ( 0.006 ms): mv/10824 renameat2(olddfd: CWD, oldname: 0x7ffc72ff3d81, newdfd: CWD, newname: 0x55ad609efcc0, flags: NOREPLACE) = -1 EEXIST File exists mv: 'c' and '/tmp/c' are the same file [pid 10824] +++ exited with 1 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=10824, si_uid=0, si_status=1, si_utime=0, si_stime=0} --- +++ exited with 0 +++ # Cc: Adrian Hunter <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Namhyung Kim <[email protected]> Link: https://lkml.kernel.org/n/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2018-12-18perf beauty: Wire up the renameat flags table generator to the MakefileArnaldo Carvalho de Melo1-0/+8
Now when we run 'make -C tools/perf O=/tmp/build/perf' we end up with: $ cat /tmp/build/perf/trace/beauty/generated/rename_flags_array.c static const char *rename_flags[] = { [0 + 1] = "NOREPLACE", [1 + 1] = "EXCHANGE", [2 + 1] = "WHITEOUT", }; $ Cc: Adrian Hunter <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Namhyung Kim <[email protected]> Link: https://lkml.kernel.org/n/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2018-12-18perf beauty: Add a string table generator for renameat2's flags constantsArnaldo Carvalho de Melo1-0/+15
Using the already copied tools/include/uapi/linux/fs.h file: $ tools/perf/trace/beauty/rename_flags.sh static const char *rename_flags[] = { [0 + 1] = "NOREPLACE", [1 + 1] = "EXCHANGE", [2 + 1] = "WHITEOUT", }; $ Cc: Adrian Hunter <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Namhyung Kim <[email protected]> Link: https://lkml.kernel.org/n/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2018-12-18perf trace beauty: Beautify renameat2's fd arg wrt AT_FDCWDArnaldo Carvalho de Melo1-0/+3
Just like is done with the 'renameat' syscall. # strace -e renameat2 -f perf trace -e rename* mv c /tmp [pid 12334] renameat2(AT_FDCWD, "c", AT_FDCWD, "/tmp", RENAME_NOREPLACE) = -1 EXDEV (Invalid cross-device link) [pid 12334] renameat2(AT_FDCWD, "c", AT_FDCWD, "/tmp/c", RENAME_NOREPLACE) = -1 EEXIST (File exists) 1.947 ( 0.007 ms): mv/12334 renameat2(olddfd: CWD, oldname: 0x7ffce8b7fd81, newdfd: CWD, newname: 0x7ffce8b7fd83, flags: 1) = -1 EXDEV Invalid cross-device link 2.073 ( 0.009 ms): mv/12334 renameat2(olddfd: CWD, oldname: 0x7ffce8b7fd81, newdfd: CWD, newname: 0x55ce7f0a1cc0, flags: 1mv: ) = -1 EEXIST File exists'c' and '/tmp/c' are the same file # Cc: Adrian Hunter <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Namhyung Kim <[email protected]> Link: https://lkml.kernel.org/n/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2018-12-18perf trace: Allow selecting use the use of the ordered_events codeArnaldo Carvalho de Melo2-6/+25
I was trigger happy on this one, as using ordered_events as implemented by Jiri for use with the --block code under discussion on lkml incurs in delaying processing to form batches that then get ordered and then printed. With 'perf trace' we want to process the events as they go, without that delay, and doing it that way works well for the common case which is to trace a thread or a workload started by 'perf trace'. So revert back to not using ordered_events but add an option to select that mode so that users can experiment with their particular use case to see if works better, i.e. if the added delay is not a problem and the ordering helps. Cc: Adrian Hunter <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Namhyung Kim <[email protected]> Link: https://lkml.kernel.org/n/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2018-12-18perf trace: Rename delivery functions to ease making ordered_events selectableArnaldo Carvalho de Melo1-7/+7
Just hide a bit more how events gets delivered, hiding ordered_events details from the main loop. Cc: Adrian Hunter <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Namhyung Kim <[email protected]> Link: https://lkml.kernel.org/n/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2018-12-18tools lib traceevent: Fix processing of dereferenced args in bprintk eventsSteven Rostedt (VMware)1-0/+1
In the case that a bprintk event has a dereferenced pointer that is stored as a string, and there's more values to process (more args), the arg was not updated to point to the next arg after processing the dereferenced pointer, and it screwed up what was to be displayed. Signed-off-by: Steven Rostedt (VMware) <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: [email protected] Cc: [email protected] Fixes: 37db96bb49629 ("tools lib traceevent: Handle new pointer processing of bprint strings") Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2018-12-18perf stat: Avoid segfaults caused by negated optionsMichael Petlan1-1/+7
Some 'perf stat' options do not make sense to be negated (event, cgroup), some do not have negated path implemented (metrics). Due to that, it is better to disable the "no-" prefix for them, since otherwise, the later opt-parsing segfaults. Before: $ perf stat --no-metrics -- ls Segmentation fault (core dumped) After: $ perf stat --no-metrics -- ls Error: option `no-metrics' isn't available Usage: perf stat [<options>] [<command>] Signed-off-by: Michael Petlan <[email protected]> Tested-by: Arnaldo Carvalho de Melo <[email protected]> LPU-Reference: [email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2018-12-18perf tests: Use shebangs in the shell scriptsMichael Petlan5-0/+7
Since the first line was used as a test identification, it needs to be skipped by shell_test__description() function now. Further notes from Hendrik: It might be worth to note that adding the shebang is necessary to spot them as scripts. Using /bin/sh looks fine to. Just briefly checked whether the scripts contains some bash-specifics, which is not the case. Signed-off-by: Michael Petlan <[email protected]> Reviewed-by: Hendrik Brueckner <[email protected]> Cc: Jiri Olsa <[email protected]> LPU-Reference: [email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2018-12-18perf auxtrace: Alter addr_filter__entire_dso() to work if there are no symbolsAdrian Hunter1-7/+4
addr_filter__entire_dso() uses the first and last symbols from a dso, and so does not work when there are no symbols. Alter it to filter the whole file instead. Signed-off-by: Adrian Hunter <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Masami Hiramatsu <[email protected]> Cc: Mathieu Poirier <[email protected]> Fixes: 1b36c03e3569 ("perf record: Add support for using symbols in address filters") Link: http://lkml.kernel.org/r/[email protected] [ split from a larger patch ] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2018-12-18perf dso: Export data_file_size() method there are no symbolsAdrian Hunter2-3/+4
Will be used outside dso.c in a followup patch, so rename it and make it non-static. Signed-off-by: Adrian Hunter <[email protected]> Cc: Jiri Olsa <[email protected]> Link: http://lkml.kernel.org/r/[email protected] [ split from a larger patch ] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
2018-12-18tools: bpftool: add an option to prevent auto-mount of bpffs, tracefsQuentin Monnet7-2/+31
In order to make life easier for users, bpftool automatically attempts to mount the BPF virtual file system, if it is not mounted already, before trying to pin objects in it. Similarly, it attempts to mount tracefs if necessary before trying to dump the trace pipe to the console. While mounting file systems on-the-fly can improve user experience, some administrators might prefer to avoid that. Let's add an option to block these mount attempts. Note that it does not prevent automatic mounting of tracefs by debugfs for the "bpftool prog tracelog" command. Signed-off-by: Quentin Monnet <[email protected]> Reviewed-by: Jakub Kicinski <[email protected]> Signed-off-by: Daniel Borkmann <[email protected]>
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