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This patch adds a test which verifies that the DSCR privilege and
problem state SPR read & write accesses while making sure that the
results are always the same irrespective of which SPR number is being
used.
Acked-by: Shuah Khan <[email protected]>
Signed-off-by: Anshuman Khandual <[email protected]>
Signed-off-by: Anton Blanchard <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
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This patch adds a test which modifies the DSCR using mtspr instruction
and verifies the change using mfspr instruction. It uses both the
privilege state SPR as well as the problem state SPR for the purpose.
Acked-by: Shuah Khan <[email protected]>
Signed-off-by: Anshuman Khandual <[email protected]>
Signed-off-by: Anton Blanchard <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
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This patch adds a test case for the system wide DSCR default value,
which when changed through it's sysfs interface must be visible to all
threads reading DSCR either through the privilege state SPR or the
problem state SPR. The DSCR value change should be immediate as well.
Acked-by: Shuah Khan <[email protected]>
Signed-off-by: Anshuman Khandual <[email protected]>
Signed-off-by: Anton Blanchard <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar:
"Misc fixes:
- early_idt_handlers[] fix that fixes the build with bleeding edge
tooling
- build warning fix on GCC 5.1
- vm86 fix plus self-test to make it harder to break it again"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/asm/irq: Stop relying on magic JMP behavior for early_idt_handlers
x86/asm/entry/32, selftests: Add a selftest for kernel entries from VM86 mode
x86/boot: Add CONFIG_PARAVIRT_SPINLOCKS quirk to arch/x86/boot/compressed/misc.h
x86/asm/entry/32: Really make user_mode() work correctly for VM86 mode
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Before patch ba92732e9808 ('perf kmaps: Check kmaps to make code more
robust'), 'perf report' and 'perf annotate' will segfault if trace data
contains kernel module information like this:
# perf report -D -i ./perf.data
...
0 0 0x188 [0x50]: PERF_RECORD_MMAP -1/0: [0xffffffbff1018000(0xf068000) @ 0]: x [test_module]
...
# perf report -i ./perf.data --objdump=/path/to/objdump --kallsyms=/path/to/kallsyms
perf: Segmentation fault
-------- backtrace --------
/path/to/perf[0x503478]
/lib64/libc.so.6(+0x3545f)[0x7fb201f3745f]
/path/to/perf[0x499b56]
/path/to/perf(dso__load_kallsyms+0x13c)[0x49b56c]
/path/to/perf(dso__load+0x72e)[0x49c21e]
/path/to/perf(map__load+0x6e)[0x4ae9ee]
/path/to/perf(thread__find_addr_map+0x24c)[0x47deec]
/path/to/perf(perf_event__preprocess_sample+0x88)[0x47e238]
/path/to/perf[0x43ad02]
/path/to/perf[0x4b55bc]
/path/to/perf(ordered_events__flush+0xca)[0x4b57ea]
/path/to/perf[0x4b1a01]
/path/to/perf(perf_session__process_events+0x3be)[0x4b428e]
/path/to/perf(cmd_report+0xf11)[0x43bfc1]
/path/to/perf[0x474702]
/path/to/perf(main+0x5f5)[0x42de95]
/lib64/libc.so.6(__libc_start_main+0xf4)[0x7fb201f23bd4]
/path/to/perf[0x42dfc4]
This is because __kmod_path__parse treats '[' leading names as kernel
name instead of names of kernel module.
If perf.data contains build information and the buildid of such modules
can be found, the dso->kernel of it will be set to DSO_TYPE_KERNEL by
__event_process_build_id(), not kernel module.
It will then be passed to dso__load() -> dso__load_kernel_sym() ->
dso__load_kcore() if --kallsyms is provided.
The refered patch adds NULL pointer checker to avoid segfault. However,
such kernel modules are still processed incorrectly.
This patch fixes __kmod_path__parse, makes it treat names like
'[test_module]' as kernel modules.
kmod-path.c is also update to reflect the above changes.
Signed-off-by: Wang Nan <[email protected]>
Acked-by: Jiri Olsa <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Zefan Li <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
[ Fixed the merged with 0443f36b0de0 ("perf machine: Fix the search
for the kernel DSO on the unified list" ]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
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x86/core, to apply dependent patch
Signed-off-by: Ingo Molnar <[email protected]>
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This patch moves list.h from tools/perf/util/include/linux/list.h to
tools/include/linux/list.h to enable other libraries use macros in it,
like libbpf which will be introduced by further patches. Since list.h
depend on poison.h, poison.h is also moved.
Both file use relative path, so one '..' is removed for each header to
make them suit for new directory.
MANIFEST is also updated for 'make perf-*-src-pkg'.
Signed-off-by: Wang Nan <[email protected]>
Cc: Alexei Starovoitov <[email protected]>
Cc: Brendan Gregg <[email protected]>
Cc: Daniel Borkmann <[email protected]>
Cc: David Ahern <[email protected]>
Cc: He Kuang <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Kaixu Xia <[email protected]>
Cc: Masami Hiramatsu <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Zefan Li <[email protected]>
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
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This patch moves kernel.h from tools/perf/util/include/linux/kernel.h
to tools/include/linux/kernel.h to enable other libraries use macros in
it, like libbpf which will be introduced by further patches.
MANIFEST is also updated for 'make perf-*-src-pkg'.
Signed-off-by: Wang Nan <[email protected]>
Acked-by: Alexei Starovoitov <[email protected]>
Cc: Brendan Gregg <[email protected]>
Cc: Daniel Borkmann <[email protected]>
Cc: David Ahern <[email protected]>
Cc: He Kuang <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Kaixu Xia <[email protected]>
Cc: Masami Hiramatsu <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Zefan Li <[email protected]>
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
[ Fixed up the ifdef guard to match other entries in tools/include/linux ]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
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When unifying the user_dsos and kernel_dsos a bug was introduced by
inverting the check for dso->kernel, fix it.
Fixes: 3d39ac538629 ("perf machine: No need to have two DSOs lists")
Cc: Adrian Hunter <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Namhyung Kim <[email protected]>
Link: http://lkml.kernel.org/n/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
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These tests were merged in parallel to the install support, update them
now to use it.
This also adds cross compile support for the VPHN test which was missing
it.
Signed-off-by: Michael Ellerman <[email protected]>
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git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/rcu
Pull RCU changes from Paul E. McKenney:
- Initialization/Kconfig updates: hide most Kconfig options from unsuspecting users.
There's now a single high level configuration option:
*
* RCU Subsystem
*
Make expert-level adjustments to RCU configuration (RCU_EXPERT) [N/y/?] (NEW)
Which if answered in the negative, leaves us with a single interactive
configuration option:
Offload RCU callback processing from boot-selected CPUs (RCU_NOCB_CPU) [N/y/?] (NEW)
All the rest of the RCU options are configured automatically.
- Remove all uses of RCU-protected array indexes: replace the
rcu_[access|dereference]_index_check() APIs with READ_ONCE() and rcu_lockdep_assert().
- RCU CPU-hotplug cleanups.
- Updates to Tiny RCU: a race fix and further code shrinkage.
- RCU torture-testing updates: fixes, speedups, cleanups and
documentation updates.
- Miscellaneous fixes.
- Documentation updates.
Signed-off-by: Ingo Molnar <[email protected]>
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Conflicts:
drivers/net/phy/amd-xgbe-phy.c
drivers/net/wireless/iwlwifi/Kconfig
include/net/mac80211.h
iwlwifi/Kconfig and mac80211.h were both trivial overlapping
changes.
The drivers/net/phy/amd-xgbe-phy.c file got removed in 'net-next' and
the bug fix that happened on the 'net' side is already integrated
into the rest of the amd-xgbe driver.
Signed-off-by: David S. Miller <[email protected]>
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The <fd979c013207> commit intruduced the perf_event_sysfs_show function
to display the event_str value of an attr in kernel/event/core.c. But
the function returns the value with a newline char.
So, if a event also carries a event.unit file, when printing the counter
data perf tool formatting goes for a spin.
That is, because of the event unit, event name is printed in the newline
because of perf_event_sysfs_show returns with a newline char.
Now fixing perf core will break API, hencing proposing a fix in the perf tool.
Signed-off-by: Madhavan Srinivasan <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Sukadev Bhattiprolu <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
[ Add spaces around operators ]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
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Mark strings, which are not supposed to be changed (basedir, filename,
value), as const in function parameters.
Signed-off-by: Hartmut Knaack <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>
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In generic_buffer.c: sort program parameters alphabetically and provide
usage information
In lsiio.c: drop unused parameters
Signed-off-by: Hartmut Knaack <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>
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In build_channel_array(), count can be initialized already during variable
declaration.
Signed-off-by: Hartmut Knaack <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>
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In iioutils_get_type() it is logically better fitting to have sysfsfp
assigned zero right after closing it.
Signed-off-by: Hartmut Knaack <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>
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Change the assignment of *is_signed in iioutils_get_type() to a one-liner,
as already done with *be.
Signed-off-by: Hartmut Knaack <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>
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Refactor the code in print_event() to reduce code duplication and better
reflect that the type is output unconditionally, as well as cascade the
dependency of the diff-channel. Saves a few lines of code, as well.
Signed-off-by: Hartmut Knaack <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>
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Return directly, if no common cleanup is required.
Signed-off-by: Hartmut Knaack <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>
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Fully document public functions and elements.
Signed-off-by: Hartmut Knaack <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>
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Add error handling to calls which can indicate a major problem by
returning an error code.
This also involves to change the type of dump_devices() from void to int.
Signed-off-by: Hartmut Knaack <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>
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Add error handling to calls which can indicate a major problem by
returning an error code.
This also sets ret to -ENOENT in iioutils_get_type() and
iioutils_get_param_float() to indicate if no matching directory entry was
found.
Signed-off-by: Hartmut Knaack <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>
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git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux
Pull turbostat tool fixes from Len Brown:
"Just one minor kernel dependency in this batch -- added a #define to
msr-index.h"
* 'turbostat' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux:
tools/power turbostat: update version number to 4.7
tools/power turbostat: allow running without cpu0
tools/power turbostat: correctly decode of ENERGY_PERFORMANCE_BIAS
tools/power turbostat: enable turbostat to support Knights Landing (KNL)
tools/power turbostat: correctly display more than 2 threads/core
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Add error handling to calls which can indicate a major problem by
returning an error code.
Signed-off-by: Hartmut Knaack <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>
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Add error handling to calls which can indicate a major problem by
returning an error code.
Signed-off-by: Hartmut Knaack <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>
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Add handler to catch errors on conversion of numerical arguments.
Signed-off-by: Hartmut Knaack <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>
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This patch catches errors in string allocation in generic_buffer.c,
iio_event_monitor.c, iio_utils.c and lsiio.c.
Signed-off-by: Hartmut Knaack <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>
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Functions _write_sysfs_int() and _write_sysfs_string() are supposed to
be called only by public wrappers, so make them static.
Signed-off-by: Hartmut Knaack <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>
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Previously, the return value of sscanf() was treated as an indication of
the digits it would have read. Yet, sscanf() only returns the amount of
valid matches.
Therefore, introduce a function to calculate the decimal digits of the
read number and use this one to commence a colon search, as originally
intended.
Signed-off-by: Hartmut Knaack <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>
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fscanf() usually returns the number of input items successfully matched
and assigned, which can be fewer than provided (or even zero).
Add a check in iioutils_get_type() to make sure all items are matched.
Signed-off-by: Hartmut Knaack <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>
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Refactor process_scan() to handle signed and unsigned data, respect shifts
and the data mask for 2, 4 and 8 byte sized scan elements.
Signed-off-by: Hartmut Knaack <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>
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find_type_by_name() returns a valid error code in case of an error. Pass
this code up instead of an artificial one.
Signed-off-by: Hartmut Knaack <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>
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Since errno contains the value of any of the defined error names, a
negation will not lead to the desired match.
Signed-off-by: Hartmut Knaack <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>
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Move up error handling code to preserve the errno coming from ioctl(),
before it may be changed by close().
Signed-off-by: Hartmut Knaack <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>
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The man-page of errno states, that errno should be saved before doing any
library call, as that call may have changed the value of errno. So, when
encountering any error, save errno first.
This patch affects generic_buffer.c, iio_event_monitor.c and iio_utils.c.
Signed-off-by: Hartmut Knaack <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>
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In dump_channels() the DIR *dp was left open on exit. Close it and check
for errors.
Signed-off-by: Hartmut Knaack <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>
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In build_channel_array(), count needs to be decreased in more places since
current->name and current->generic_name would be freed on the error path,
although they have not been allocated, yet.
This also requires to free current->name, when it is allocated, but
current->generic_name is not yet allocated.
Signed-off-by: Hartmut Knaack <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>
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In iio_utils.c build_channel_array() dynamically allocates the string
generic_name in the current iio_channel_info, which doesn't got freed in
case of an error.
This dynamically allocated channel-array is used by generic_buffer, and
needs to be freed on the error/exit path.
Signed-off-by: Hartmut Knaack <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>
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In the error path, the string scan_el_dir got freed, while it was missing when
build_channel_array() finished without errors.
Signed-off-by: Hartmut Knaack <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>
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Make sure to free dev_dir_name in case of an error or regular exit.
Signed-off-by: Hartmut Knaack <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>
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data gets allocated before buffer_access, so it should be freed in reverse
order. Otherwise, if allocating buffer_access fails, an attempt to free it
would be taken, which should not happen.
Signed-off-by: Hartmut Knaack <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>
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Commit 4c859351226c920b227fec040a3b447f0d482af3 ("perf probe: Support
glob wildcards for function name") introduces segfault problems when
debuginfo is not available:
# perf probe 'sys_w*'
Added new events:
Segmentation fault
The first problem resides in find_probe_trace_events_from_map(). In
that function, find_probe_functions() is called to match each symbol
against glob to find the number of matching functions, but still use
map__for_each_symbol_by_name() to find 'struct symbol' for matching
functions. Unfortunately, map__for_each_symbol_by_name() does
exact matching by searching in an rbtree.
It doesn't know glob matching, and not easy for it to support it because
it use rbtree based binary search, but we are unable to ensure all names
matched by the glob (any glob passed by user) reside in one subtree.
This patch drops map__for_each_symbol_by_name(). Since there is no
rbtree again, re-matching all symbols costs a lot. This patch avoid it
by saving all matching results into an array (syms).
The second problem is the lost of tp->realname. In
__add_probe_trace_events(), if pev->point.function is glob, the event
name should be set to tev->point.realname. This patch ensures its
existence by strdup sym->name instead of leaving a NULL pointer there.
After this patch:
# perf probe 'sys_w*'
Added new events:
probe:sys_waitid (on sys_w*)
probe:sys_wait4 (on sys_w*)
probe:sys_waitpid (on sys_w*)
probe:sys_write (on sys_w*)
probe:sys_writev (on sys_w*)
You can now use it in all perf tools, such as:
perf record -e probe:sys_writev -aR sleep 1
Signed-off-by: Wang Nan <[email protected]>
Acked-by: Masami Hiramatsu <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Zefan Li <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
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Test a couple of special cases in 32-bit kernels for entries
from vm86 mode. This will OOPS both old kernels due to a bug
and and 4.1-rc5 due to a regression I introduced, and it should
make sure that the SYSENTER-from-vm86-mode hack in the kernel
keeps working.
Signed-off-by: Andy Lutomirski <[email protected]>
Cc: Jan Beulich <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Shuah Khan <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Link: http://lkml.kernel.org/r/09a9916761e0a9e42d4922f147af45a0079cc1e8.1432936374.git.luto@kernel.org
Tests: 394838c96013 x86/asm/entry/32: Fix user_mode() misuses
Tests: 7ba554b5ac69 x86/asm/entry/32: Really make user_mode() work correctly for VM86 mode
Signed-off-by: Ingo Molnar <[email protected]>
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There is clearly wrong output when mperf monitor runs in MAX_FREQ_SYSFS mode:
average frequency shows in kHz unit (despite the intended output to be in MHz),
and percentages for C state information are all wrong (including high/negative
values shown).
The problem is that the max_frequency read on initialization isn't used where it
should have been used on mperf_get_count_percent (to estimate the number of
ticks in the given time period), and the value we read from sysfs is in kHz, so
we must divide it to get the MHz value to use in current calculations.
While at it, also I fixed another small issues in the debug output of
max_frequency value in mperf_get_count_freq.
Signed-off-by: Herton R. Krzesinski <[email protected]>
Acked-by: Thomas Renninger <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
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It was inconvenient that perf cannot be quit with SIGINT during
processing samples on TUI especially for large data files.
This was because the first argument of SLang_init_tty(), abort_char,
being 0. The manual says it's the ascii value of the control character
that will be used to generate the interrupt signal [1]. Passing -1
means to use the default value (Ctrl-C).
However, after processing samples, Ctrl-C was used to in other cases as
well - like stepping back from annotate. So recover the original
behavior after processing.
[1] http://jedsoft.org/slang/doc/html/cslang-6.html#ss6.1
Signed-off-by: Namhyung Kim <[email protected]>
Tested-by: Arnaldo Carvalho de Melo <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
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Allow nesting into directories without Build file. Currently we force
include of the Build file, which fails the build when the Build file is
missing.
We already support empty *-in.o' objects if there's nothing in the
directory to be compiled, so we can just use it for missing Build file
cases.
Also adding this case under tests.
Reported-by: Rabin Vincent <[email protected]>
Signed-off-by: Jiri Olsa <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Rabin Vincent <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
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To make it consistent with the other dso lifetime routines.
For instance:
struct dso *vdso__new(struct machine *machine, const char *short_name,
const char *long_name)
Becomes:
struct dso *machine__addnew_vdso(struct machine *machine, const
char *short_name, const char *long_name)
Because:
1) There is no 'struct vdso' for us to have vdso__ prefixed routines.
2) Because it will not really just create a new instance of 'struct
dso', it'll call dso__new() but it will also insert it into the
DSO's list/rbtree, and we have a method name for that: 'addnew',
just like we have dsos__addnew().
3) So it is really a 'struct machine' operation, it is the first
argument, etc.
This way the place where this is used gets consistent:
if (vdso) {
pgoff = 0;
- dso = vdso__dso_findnew(machine, thread);
+ dso = machine__findnew_vdso(machine, thread);
} else
dso = machine__findnew_dso(machine, filename);
Cc: Adrian Hunter <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Namhyung Kim <[email protected]>
Link: http://lkml.kernel.org/n/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
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Similar to machine__findnew_thread(), also prepping for refcounting and
locking, this time for struct dso instances.
Cc: Adrian Hunter <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Namhyung Kim <[email protected]>
Link: http://lkml.kernel.org/n/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
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We can, given a DSO, figure out if it is a kernel, a kernel module or
a userlevel DSO, so stop having to process two lists in several
functions.
If searching becomes an issue at some point, we can have them in a
rbtree, etc.
Cc: Adrian Hunter <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Don Zickus <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Stephane Eranian <[email protected]>
Link: http://lkml.kernel.org/n/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
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