Harish Chegondi [Mon, 7 Dec 2015 22:32:31 +0000 (14:32 -0800)]
perf/x86/intel/uncore: Remove hard coding of PMON box control MSR offset
Call uncore_pci_box_ctl() function to get the PMON box control MSR offset
instead of hard coding the offset. This would allow us to use this
snbep_uncore_pci_init_box() function for other PCI PMON devices whose box
control MSR offset is different from SNBEP_PCI_PMON_BOX_CTL.
Harish Chegondi [Mon, 7 Dec 2015 22:28:18 +0000 (14:28 -0800)]
perf/x86/intel: Add perf core PMU support for Intel Knights Landing
Knights Landing core is based on Silvermont core with several differences.
Like Silvermont, Knights Landing has 8 pairs of LBR MSRs. However, the
LBR MSRs addresses match those of the Xeon cores' first 8 pairs of LBR MSRs
Unlike Silvermont, Knights Landing supports hyperthreading. Knights Landing
offcore response events config register mask is different from that of the
Silvermont.
This patch was developed based on a patch from Andi Kleen.
For more details, please refer to the public document:
Kan Liang [Thu, 3 Dec 2015 21:00:11 +0000 (16:00 -0500)]
perf/x86/intel/uncore: Add Broadwell-EP uncore support
The uncore subsystem for Broadwell-EP is similar to Haswell-EP.
There are some differences in pci device IDs, box number and
constraints. This patch extends the Broadwell-DE codes to support
Broadwell-EP.
Signed-off-by: Kan Liang <kan.liang@intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Link: http://lkml.kernel.org/r/1449176411-9499-1-git-send-email-kan.liang@intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
This patch updates the PEBS support for Intel Atom to provide
an alias for the cycles:pp event used by perf record/top by default
nowadays.
On Atom, only INST_RETIRED:ANY supports PEBS, so we use this event
instead with a large cmask to count cycles. Given that Core2 has
the same issue, we use the intel_pebs_aliases_core2() function for Atom
as well.
Signed-off-by: Stephane Eranian <eranian@google.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Cc: kan.liang@intel.com Link: http://lkml.kernel.org/r/1449172990-30183-3-git-send-email-eranian@google.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
This patches fixes the LBR kernel crashes on Intel Atom.
The kernel was assuming that if the CPU supports 64-bit format
LBR, then it has an LBR_SELECT MSR. Atom uses 64-bit LBR format
but does not have LBR_SELECT. That was causing NULL pointer
dereferences in a couple of places.
Signed-off-by: Stephane Eranian <eranian@google.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Cc: kan.liang@intel.com Fixes: 96f3eda67fcf ("perf/x86/intel: Fix static checker warning in lbr enable") Link: http://lkml.kernel.org/r/1449182000-31524-2-git-send-email-eranian@google.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
perf/x86: Fix filter_events() bug with event mappings
This patch fixes a bug in the filter_events() function.
The patch fixes the bug whereby if some mappings did not
exist, e.g., STALLED_CYCLES_FRONTEND, then any event after it
in the attrs array would disappear from the published list of
events in /sys/devices/cpu/events. This could be verified
easily on any system post SNB (which do not publish
STALLED_CYCLES_FRONTEND):
$ ./perf stat -e cycles,ref-cycles true
Performance counter stats for 'true':
1,217,348 cycles
<not supported> ref-cycles
The problem is that in filter_events() there is an assumption
that the argument (attrs) is organized in increasing continuous
event indexes related to the event_map(). But if we remove the
non-supported events by shifing the position in the array, then
the lookup x86_pmu.event_map() needs to compensate for it, otherwise
we are looking up the wrong index. This patch corrects this problem
by compensating for the deleted events and with that ref-cycles
reappears (here shown on Haswell):
$ perf stat -e ref-cycles,cycles true
Performance counter stats for 'true':
4,525,910 ref-cycles
1,064,920 cycles
0.002943888 seconds time elapsed
Signed-off-by: Stephane Eranian <eranian@google.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Cc: jolsa@kernel.org Cc: kan.liang@intel.com Fixes: 8300daa26755 ("perf/x86: Filter out undefined events from sysfs events attribute") Link: http://lkml.kernel.org/r/1449516805-6637-1-git-send-email-eranian@google.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Andi Kleen [Fri, 4 Dec 2015 11:50:52 +0000 (03:50 -0800)]
perf/x86: Use INST_RETIRED.PREC_DIST for cycles: ppp
Add a new 'three-p' precise level, that uses INST_RETIRED.PREC_DIST as
base. The basic mechanism of abusing the inverse cmask to get all
cycles works the same as before.
PREC_DIST is available on Sandy Bridge or later. It had some problems
on Sandy Bridge, so we only use it on IvyBridge and later. I tested it
on Broadwell and Skylake.
PREC_DIST has special support for avoiding shadow effects, which can
give better results compare to UOPS_RETIRED. The drawback is that
PREC_DIST can only schedule on counter 1, but that is ok for cycle
sampling, as there is normally no need to do multiple cycle sampling
runs in parallel. It is still possible to run perf top in parallel, as
that doesn't use precise mode. Also of course the multiplexing can
still allow parallel operation.
Andi Kleen [Fri, 4 Dec 2015 11:50:32 +0000 (03:50 -0800)]
perf/x86: Use INST_RETIRED.TOTAL_CYCLES_PS for cycles:pp for Skylake
I added UOPS_RETIRED.ALL by mistake to the Skylake PEBS event list for
cycles:pp. But the event is not documented for Skylake, and has some
issues.
The recommended replacement for cycles:pp is to use
INST_RETIRED.ANY+pebs as a base, similar to what CPUs before Sandy
Bridge did. This new event is called INST_RETIRED.TOTAL_CYCLES_PS. The
event is not really new, but has been already used by perf before
Sandy Bridge for the original cycles:p
Note the SDM doesn't document that event either, but it's being
documented in the latest version of the event list on:
https://download.01.org/perfmon/SKL
This patch does:
- Remove UOPS_RETIRED.ALL from the Skylake PEBS event list
- Add INST_RETIRED.ANY to the Skylake PEBS event list, and an table entry to
allow cmask=16,inv=1 for cycles:pp
- We don't need an extra entry for the base INST_RETIRED event,
because it is already covered by the catch-all PEBS table entry.
- Switch Skylake to use the Core2 PEBS alias (which is
INST_RETIRED.TOTAL_CYCLES_PS)
Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Cc: hpa@zytor.com Link: http://lkml.kernel.org/r/1448929689-13771-1-git-send-email-andi@firstfloor.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Andi Kleen [Thu, 3 Dec 2015 21:22:20 +0000 (13:22 -0800)]
perf/x86: Allow zero PEBS status with only single active event
Normally we drop PEBS events with a zero status field. But when
there is only a single PEBS event active we can assume the
PEBS record is for that event. The PEBS buffer is always flushed
when PEBS events are disabled, so there is no risk of mishandling
state PEBS records this way.
Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Link: http://lkml.kernel.org/r/1449177740-5422-2-git-send-email-andi@firstfloor.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Peter Zijlstra [Thu, 3 Dec 2015 17:35:21 +0000 (18:35 +0100)]
perf/core: Collapse more IPI loops
This patch collapses the two 'hard' cases, which are
perf_event_{dis,en}able().
I cannot seem to convince myself the current code is correct.
So starting with perf_event_disable(); we don't strictly need to test
for event->state == ACTIVE, ctx->is_active is enough. If the event is
not scheduled while the ctx is, __perf_event_disable() still does the
right thing. Its a little less efficient to IPI in that case,
over-all simpler.
For perf_event_enable(); the same goes, but I think that's actually
broken in its current form. The current condition is: ctx->is_active
&& event->state == OFF, that means it doesn't do anything when
!ctx->active && event->state == OFF. This is wrong, it should still
mark the event INACTIVE in that case, otherwise we'll still not try
and schedule the event once the context becomes active again.
This patch implements the two function using the new
event_function_call() and does away with the tricky event->state
tests.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Alexander Shishkin <alexander.shishkin@intel.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Signed-off-by: Ingo Molnar <mingo@kernel.org>
Peter Zijlstra [Tue, 15 Dec 2015 12:49:05 +0000 (13:49 +0100)]
perf: Fix race in swevent hash
There's a race on CPU unplug where we free the swevent hash array
while it can still have events on. This will result in a
use-after-free which is BAD.
Simply do not free the hash array on unplug. This leaves the thing
around and no use-after-free takes place.
When the last swevent dies, we do a for_each_possible_cpu() iteration
anyway to clean these up, at which time we'll free it, so no leakage
will occur.
Which is a WARN_ON_ONCE() indicating that cpuctx->task_ctx is not
what we expected it to be.
This is because context switches can swap the task_struct::perf_event_ctxp[]
pointer around. Therefore you have to either disable preemption when looking
at current, or hold ctx->lock.
Fix perf_event_enable_on_exec(), it loads current->perf_event_ctxp[]
before disabling interrupts, therefore a preemption in the right place
can swap contexts around and we're using the wrong one.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Alexander Potapenko <glider@google.com> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Eric Dumazet <edumazet@google.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Kostya Serebryany <kcc@google.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sasha Levin <sasha.levin@oracle.com> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vince Weaver <vincent.weaver@maine.edu> Cc: syzkaller <syzkaller@googlegroups.com> Link: http://lkml.kernel.org/r/20151210195740.GG6357@twins.programming.kicks-ass.net Signed-off-by: Ingo Molnar <mingo@kernel.org>
Ingo Molnar [Fri, 18 Dec 2015 08:46:17 +0000 (09:46 +0100)]
Merge tag 'perf-core-for-mingo-3' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core
Pull new perf tool feature from Arnaldo Carvalho de Melo:
" User visible changes:
- Generate perf.data files from 'perf stat', to tap into the scripting
capabilities perf has instead of defining a 'perf stat' specific scripting
support to calculate event ratios, etc. Simple example:
This patchset abandons the idea of new formula language and rather adds support
to:
- store stat data into perf.data file
- add python support to process stat events
Basically it allows to store stat data into perf.data and post process it with
python scripts in a similar way we do for sampling data.
The stat data are stored in new stat, stat-round, stat-config user events.
stat - stored for each read syscall of the counter
stat round - stored for each interval or end of the command invocation
stat config - stores all the config information needed to process data
so report tool could restore the same output as record
The python script can now define 'stat__<eventname>_<modifier>' functions
to get stat events data and 'stat__interval' to get stat-round data.
See CPI script example in scripts/python/stat-cpi.py."
Also a few other changes:
User visible changes:
- Make command line options always available, even when they
depend on some feature being enabled, warning the user about
use of such options (Wang Nan)
- Support --vmlinux in perf record, useful, so far, for eBPF,
where we will set up events that will be used in the record
session (He Kuang)
- Automatically disable collecting branch flags and cycles with
--call-graph lbr. This allows avoiding a bunch of extra MSR
reads in the PMI on Skylake. (Andi Kleen)
Infrastructure changes:
- Dump the stack when a 'perf test -v ' entry segfaults, so far we
would have to run it under gdb with 'set follow-fork-mode child'
set to get a proper backtrace (Arnaldo Carvalho de Melo)
- Initialize the refcnt in 'struct thread' to 1 and fixup its
users accordingly, so that we try to have the same refcount
model accross the perf codebase (Arnaldo Carvalho de Melo)
- More prep work for moving the subcmd infrastructure out of
tools/perf/ and into tools/lib/subcmd/ to be used by other
tools/ living utilities (Josh Poimboeuf)
- Fix 'perf test' hist testcases when kptr_restrict is on (Namhyung Kim)
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Ingo Molnar <mingo@kernel.org>
Ingo Molnar [Fri, 18 Dec 2015 08:40:13 +0000 (09:40 +0100)]
Merge tag 'perf-urgent-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent
Pull perf/urgent tooling fix from Arnaldo Carvalho de Melo:
User visible changes:
- Fix 'perf list' segfault due to lack of support for PERF_CONF_SW_BPF_OUTPUT
in an array used just for printing available events, robustify the code
involved (Arnaldo Carvalho de Melo)
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Ingo Molnar <mingo@kernel.org>
Ingo Molnar [Fri, 18 Dec 2015 08:37:51 +0000 (09:37 +0100)]
Merge tag 'perf-core-for-mingo-2.1' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core
Pull perf/core improvements from Arnaldo Carvalho de Melo:
User visible changes:
- Add record.build-id config option to 'perf record', to allow configuring
in the ~/.perfconfig file if and how build-ids should be processed, allowing
a permanent setting for options such as -B and -N: (Namhyung Kim)
$ perf record -h -B -N
Usage: perf record [<options>] [<command>]
or: perf record [<options>] -- <command> [<options>]
-B, --no-buildid do not collect buildids in perf.data
-N, --no-buildid-cache do not update the buildid cache
$
Infrastructure changes:
- Move code for options parsing and subcommand handling from tools/perf/
to tools/lib/subcmd/, so that it can be used by other tools/ living
utilities (Josh Poimboeuf)
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reported-by: Kan Liang <kan.liang@intel.com> Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1446734469-11352-17-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Thu, 5 Nov 2015 14:40:59 +0000 (15:40 +0100)]
perf stat report: Process stat and stat round events
Adding processing of stat and stat round events.
The stat data com in stat events, using generic function
process_stat_round_event to store data under perf_evsel object.
The stat-round events comes each interval or as last event in non
interval mode. The function process_stat_round_event process stored data
for each perf_evsel object and print it out.
Reported-by: Kan Liang <kan.liang@intel.com> Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1446734469-11352-16-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Thu, 5 Nov 2015 14:41:01 +0000 (15:41 +0100)]
perf stat report: Move csv_sep initialization before report command
So we have csv_sep properly initialized before report command leg.
Reported-by: Kan Liang <kan.liang@intel.com> Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1446734469-11352-18-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Thu, 5 Nov 2015 14:40:55 +0000 (15:40 +0100)]
perf stat report: Add report command
Adding 'perf stat report' command support. ATM it only processes attr
events and display nothing.
Reported-by: Kan Liang <kan.liang@intel.com> Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1446734469-11352-12-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Thu, 5 Nov 2015 14:40:54 +0000 (15:40 +0100)]
perf stat record: Synthesize event update events
Synthesize other events stuff not carried within attr event - unit,
scale, name.
Reported-by: Kan Liang <kan.liang@intel.com> Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1446734469-11352-11-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
$ perf report -D | grep PERF_RECORD | grep ROUND
0xf0 [0]: failed to process type: 16
Error:
failed to process sample
$
Reported-by: Kan Liang <kan.liang@intel.com> Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1446734469-11352-10-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Reported-by: Kan Liang <kan.liang@intel.com> Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1446734469-11352-9-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Kan Liang <kan.liang@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1446734469-11352-8-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Thu, 5 Nov 2015 14:40:50 +0000 (15:40 +0100)]
perf stat record: Add pipe support for record command
Allowing storing stat record data into pipe, so report tools
(report/script) could read data directly from record.
Committer note:
Before this patch:
$ perf stat record -o - usleep 1 | perf report -i -
incompatible file format (rerun with -v to learn more)
$ perf stat record -o - usleep 1 | perf script -i -
incompatible file format (rerun with -v to learn more)
$ ls -la perf.data
ls: cannot access perf.data: No such file or directory
$
After:
$ perf stat record -o - usleep 1 | perf report -i -
# To display the perf.data header info, please use
# --header/--header-only options.
#
Error:
The - file has no samples!
$ perf stat record -o - usleep 1 | perf script -i -
Display of symbols requested but neither sample IP nor sample address
is selected. Hence, no addresses to convert to symbols.
0 [0x80]: failed to process type: 64
$ ls -la perf.data
ls: cannot access perf.data: No such file or directory
$
Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Tested-by: Kan Liang <kan.liang@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1446734469-11352-7-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Thu, 5 Nov 2015 14:40:49 +0000 (15:40 +0100)]
perf stat record: Store events IDs in perf data file
Store event IDs in evlist object so it get stored into perf.data file.
Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Kan Liang <kan.liang@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1446734469-11352-6-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Thu, 5 Nov 2015 14:40:49 +0000 (15:40 +0100)]
perf evlist: Export id_add_fd()
Will be used to storing the event IDs in evlist object so it get stored
into perf.data file.
Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Kan Liang <kan.liang@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1446734469-11352-6-git-send-email-jolsa@kernel.org
[ Split from the patch storing the ids in the perf.data file ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Thu, 5 Nov 2015 14:40:47 +0000 (15:40 +0100)]
perf stat record: Initialize record features
Disabling all non stat related features.
Also as we now enable STAT feature in the data file, adding code to
instruct session open to skip sample type checking for stat data files.
Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Tested-by: Kan Liang <kan.liang@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1446734469-11352-4-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Thu, 5 Nov 2015 14:40:46 +0000 (15:40 +0100)]
perf stat record: Add record command
Add 'perf stat record' command support. It creates simple (header only)
perf.data file ATM.
The record command could be specified anywhere among stat options. All
stat command options are valid for stat record command with '-o' option
exception. If specified for record command it denotes the perf data file
name.
Committer note:
Set sample_type to PERF_SAMPLE_IDENTIFIER, which should be harmless
while avoiding that older tools show confusing messages, for instance,
with sample_type = 0, we get:
$ oldperf evlist
WARNING: The perf.data file's data size field is 0 which is unexpected.
Was the 'perf record' command properly terminated?
non matching sample_type
$
While with sample_type set to PERF_SAMPLE_IDENTIFIER, after we re-run 'perf
stat record usleep' we get:
$ oldperf evlist
WARNING: The perf.data file's data size field is 0 which is unexpected.
Was the 'perf record' command properly terminated?
task-clock
context-switches
cpu-migrations
page-faults
cycles
stalled-cycles-frontend
stalled-cycles-backend
instructions
branches
branch-misses
$
Which at least shows the names of the events in the perf.data file.
Additionally, such files, when passed to 'perf report' will produce:
$ oldperf report --stdio
WARNING: The perf.data file's data size field is 0 which is unexpected.
Was the 'perf record' command properly terminated?
Warning:
Kernel address maps (/proc/{kallsyms,modules}) were restricted.
Check /proc/sys/kernel/kptr_restrict before running 'perf record'.
As no suitable kallsyms nor vmlinux was found, kernel samples
can't be resolved.
Samples in kernel modules can't be resolved as well.
Error:
The perf.data file has no samples!
# To display the perf.data header info, please use --header/--header-only options.
#
$
Which is confusing and can be solved by just adding the kernel mmap record,
which will also remove that warning about the data size field being equal to
zero, after generating the mmap record:
$ oldperf evlist
task-clock
context-switches
cpu-migrations
page-faults
cycles
stalled-cycles-frontend
stalled-cycles-backend
instructions
branches
branch-misses
$ oldperf report --stdio
Error:
The perf.data file has no samples!
# To display the perf.data header info, please use --header/--header-only options.
#
[acme@zoo linux]$
No warnings, sensible output about what are the events in the perf.data file and also
a "file has no samples" message, which indeed it doesn't.
Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Tested-by: Kan Liang <kan.liang@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: htp://lkml.kernel.org/r/1446734469-11352-3-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Sun, 25 Oct 2015 14:51:43 +0000 (15:51 +0100)]
perf tools: Introduce stat perf.data header feature
Introducing the 'stat' feature to mark a perf.data as created by the
'perf stat record' command. It contains no data.
It's needed so that the report tools (report/script) can differentiate
sampling data from counting data, because they need to be treated in a
different way.
In the future it might be used to store the version of the stat storage
system used.
Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Kan Liang <kan.liang@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1445784728-21732-28-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Sun, 25 Oct 2015 14:51:42 +0000 (15:51 +0100)]
perf report: Display newly added events in raw dump
The 'perf report -D' command will now display detailed output for these
newly added events:
event_update
thread_map
cpu_map
stat
stat_config
stat_round
Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Kan Liang <kan.liang@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1445784728-21732-27-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Sun, 25 Oct 2015 14:51:41 +0000 (15:51 +0100)]
perf tools: Add perf_event__fprintf_event_update function
To display a 'event update' event for raw dump.
Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Kan Liang <kan.liang@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1445784728-21732-26-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Sun, 25 Oct 2015 14:51:40 +0000 (15:51 +0100)]
perf tools: Add event_update event cpus type
Adding the cpumask 'event update' event, that stores/transfer the
cpumask for a event.
Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Kan Liang <kan.liang@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1445784728-21732-25-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Sun, 25 Oct 2015 14:51:39 +0000 (15:51 +0100)]
perf tools: Add event_update event name type
Adding name type 'event update' event, that stores/transfer events name.
Event's name is stored within perf.data's EVENT_DESC feature, but we
don't have it if we get the report data from pipe.
Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Kan Liang <kan.liang@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1445784728-21732-24-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Sun, 25 Oct 2015 14:51:38 +0000 (15:51 +0100)]
perf tools: Add event_update event scale type
A__allocdding scale type 'event update' event, that stores/transfer
events scale value. The PMU events can define the scale
value which is used to multiply events data.
Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Kan Liang <kan.liang@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1445784728-21732-23-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Sun, 25 Oct 2015 14:51:37 +0000 (15:51 +0100)]
perf tools: Add event_update event unit type
Adding unit type 'event update' event, that stores/transfer events unit
name. The unit name is part of the perf stat output data.
Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Kan Liang <kan.liang@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1445784728-21732-22-git-send-email-jolsa@kernel.org
[ Rename __alloc() to __new() for consistency ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Sun, 25 Oct 2015 14:51:36 +0000 (15:51 +0100)]
perf tools: Add event_update user level event
It'll serve as a base event for additional event attributes details,
that are not part of the attr event.
At the moment this event is just a dummy one without any specific
functionality. The type value will distinguish the update event details.
It'll come in the following patches.
The idea for this event is to be extensible for any update that the
event might need in the future.
Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Kan Liang <kan.liang@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1445784728-21732-21-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Kan Liang <kan.liang@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1445784728-21732-20-git-send-email-jolsa@kernel.org
[ s/stat/st/g and s/round/rd/g parameters to fix 'already defined' build error with older distros (e.g. RHEL6.7) ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Sun, 25 Oct 2015 14:51:34 +0000 (15:51 +0100)]
perf tools: Add stat round event synthesize function
Introduce the perf_event__synthesize_stat_round function to
synthesize a 'struct stat_round_event'.
Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Kan Liang <kan.liang@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1445784728-21732-19-git-send-email-jolsa@kernel.org
[ Renamed 'time' parameter to 'evtime' to fix build on older systems ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Sun, 25 Oct 2015 14:51:33 +0000 (15:51 +0100)]
perf tools: Add stat round user level event
Adding the stat round event to be stored after each stat interval round,
so that report tools (report/script) gets notified and process interval
data.
Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Kan Liang <kan.liang@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1445784728-21732-18-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Sun, 25 Oct 2015 14:51:30 +0000 (15:51 +0100)]
perf tools: Add stat user level event
Adding a stat event to store a 'struct perf_counter_values' for a given
event/cpu/thread.
Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Kan Liang <kan.liang@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1445784728-21732-15-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Sun, 25 Oct 2015 14:51:29 +0000 (15:51 +0100)]
perf tools: Add stat config event read function
Introducing the perf_event__read_stat_config function to read a struct
perf_stat_config object data from a stat config event.
Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Kan Liang <kan.liang@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1445784728-21732-14-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Sun, 25 Oct 2015 14:51:28 +0000 (15:51 +0100)]
perf tools: Add stat config event synthesize function
Introduce the perf_event__synthesize_stat_config to synthesize a 'struct
perf_stat_config'.
Storing the stat config in the form of tag-value pairs will, I believe,
sort out future version extensibility issues.
Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Kan Liang <kan.liang@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1445784728-21732-13-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Sun, 25 Oct 2015 14:51:26 +0000 (15:51 +0100)]
perf cpu_map: Add perf_event__fprintf_cpu_map function
To display a cpu_map event for raw dump.
Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Kan Liang <kan.liang@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1445784728-21732-11-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Sun, 25 Oct 2015 14:51:25 +0000 (15:51 +0100)]
perf cpu_map: Add cpu_map__new_event function
Introducing the cpu_map__new_event function to create a struct cpu_map
object from a cpu_map event.
Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Kan Liang <kan.liang@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1445784728-21732-10-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
to make the cpu_map synthesizing usable for other events.
Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Kan Liang <kan.liang@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1445784728-21732-9-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Sun, 25 Oct 2015 14:51:22 +0000 (15:51 +0100)]
perf thread_map: Add perf_event__fprintf_thread_map function
To display a thread_map event for a raw dump.
Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Kan Liang <kan.liang@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1445784728-21732-7-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Sun, 25 Oct 2015 14:51:21 +0000 (15:51 +0100)]
perf thread_map: Add thread_map__new_event function
Introducing the thread_map__new_event function to create a struct
thread_map object from a thread_map event.
Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Kan Liang <kan.liang@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1445784728-21732-6-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Sun, 25 Oct 2015 14:51:20 +0000 (15:51 +0100)]
perf thread_map: Add thread_map event sythesize function
Introduce the perf_event__synthesize_thread_map2 function to synthesize
struct thread_map.
The perf_event__synthesize_thread_map name is already taken for
synthesizing the complete threads data (comm/mmap/fork).
Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Kan Liang <kan.liang@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1445784728-21732-5-git-send-email-jolsa@kernel.org
[ Rename thread_map_data_event to thread_map_event_entry ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Sun, 25 Oct 2015 14:51:19 +0000 (15:51 +0100)]
perf thread_map: Add thread_map user level event
Adding the thread_map event to pass/store thread maps as data in
the pipe/perf.data.
Storing the thread ID along with the standard comm[16] thread name string.
Signed-off-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Kan Liang <kan.liang@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1445784728-21732-4-git-send-email-jolsa@kernel.org
[ Renamed thread_map_data_event to thread_map_event_entry ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
When a43eec304259 ("bpf: introduce bpf_perf_event_output() helper") added
PERF_COUNT_SW_BPF_OUTPUT we ended up with a new entry in the event_symbols_sw
array that wasn't initialized, thus set to NULL, fix print_symbol_events()
to check for that case so that we don't crash if this happens again.
(gdb) bt
#0 __match_glob (ignore_space=false, pat=<optimized out>, str=<optimized out>) at util/string.c:198
#1 strglobmatch (str=<optimized out>, pat=pat@entry=0x7fffffffe61d "stall") at util/string.c:252
#2 0x00000000004993a5 in print_symbol_events (type=1, syms=0x872880 <event_symbols_sw+160>, max=11, name_only=false, event_glob=0x7fffffffe61d "stall")
at util/parse-events.c:1615
#3 print_events (event_glob=event_glob@entry=0x7fffffffe61d "stall", name_only=false) at util/parse-events.c:1675
#4 0x000000000042c79e in cmd_list (argc=1, argv=0x7fffffffe390, prefix=<optimized out>) at builtin-list.c:68
#5 0x00000000004788a5 in run_builtin (p=p@entry=0x871758 <commands+120>, argc=argc@entry=2, argv=argv@entry=0x7fffffffe390) at perf.c:370
#6 0x0000000000420ab0 in handle_internal_command (argv=0x7fffffffe390, argc=2) at perf.c:429
#7 run_argv (argv=0x7fffffffe110, argcp=0x7fffffffe11c) at perf.c:473
#8 main (argc=2, argv=0x7fffffffe390) at perf.c:588
(gdb) p event_symbols_sw[PERF_COUNT_SW_BPF_OUTPUT]
$4 = {symbol = 0x0, alias = 0x0}
(gdb)
A patch to robustify perf to not segfault when the next counter gets added in
the kernel will follow this one.
Reported-by: Ingo Molnar <mingo@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexei Starovoitov <ast@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-57wysblcjfrseb0zg5u7ek10@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Josh Poimboeuf [Tue, 15 Dec 2015 15:39:35 +0000 (09:39 -0600)]
perf tools: Provide subcmd configuration at runtime
Create init functions for exec_cmd.c and pager.c. This allows their
configuration to be specified at runtime so they can be split out into a
separate library which can be used by other programs. Their
configuration is stored in a shared subcmd_config struct.
Josh Poimboeuf [Tue, 15 Dec 2015 15:39:34 +0000 (09:39 -0600)]
perf tools: Document the fact that parse_options*() may exit
Generally, calling exit() from a library is bad practice. Eventually
these functions might be redesigned so that they don't exit. For now,
just document the fact that they do.
Josh Poimboeuf [Tue, 15 Dec 2015 15:39:32 +0000 (09:39 -0600)]
tools build: Fix feature Makefile issues with 'O='
When building perf binaries outside the source tree with 'make O=<dir>',
the auto-detected features get re-tested for every build, which is
unnecessary and inconsistent with the behavior seen when building
directly in the source tree.
Another issue is that 'make O=<dir> clean' doesn't remove the feature
files from the object tree.
Fix these problems by looking for the binaries in the $(OUTPUT)
directory.
Namhyung Kim [Tue, 15 Dec 2015 01:49:56 +0000 (10:49 +0900)]
perf record: Add record.build-id config option
Post processing at 'perf record' takes a long time on big machines.
What it does is to find the build-id of binaries found in the event
stream, so that it can make sure, at 'report' time, that the symtabs (be
it ELF, kallsyms, etc) being used to resolve symbols are the ones
matching the binaries found at 'record' time.
Sometimes we just want to skip this processing of events at the end of
the session to get quicker results, making sure the binaries haven't
changed from 'record' to 'report' time.
Add a new config option to control this behavior.
The record.build-id config variable can have one of the following
values:
- cache: post-process data and save/update the binaries into the
build-id cache (in ~/.debug). This is the default.
- no-cache: post-process the data but not update the build-id cache.
Same effect as using the -N option.
- skip: skip post-processing and do not update the cache.
Same effect as using the -B option.
Reported-and-Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Taeung Song <treeze.taeung@gmail.com> Link: http://lkml.kernel.org/r/1450144196-22957-1-git-send-email-namhyung@kernel.org
[ Added some more text to the documentation ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
He Kuang [Mon, 14 Dec 2015 10:39:23 +0000 (10:39 +0000)]
perf record: Support custom vmlinux path
Make perf-record command support --vmlinux option if BPF_PROLOGUE is on.
'perf record' needs vmlinux as the source of DWARF info to generate
prologue for BPF programs, so path of vmlinux should be specified.
Short name 'k' has been taken by 'clockid'. This patch skips the short
option name and uses '--vmlinux' for vmlinux path.
Documentation is also updated.
Test result:
In a production (or broken) environment:
(by:
# rm -rf ~/.debug/
# mv /lib/modules/`uname -r`/build/vmlinux /tmp/
)
# ./perf record -e ./test_bpf_base.c ls
Failed to find the path for kernel: No such file or directory
event syntax error: './test_bpf_base.c'
\___ You need to check probing points in BPF file
...
# ./perf record --vmlinux /tmp/vmlinux -e ./test_bpf_base.c ls
...
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.011 MB perf.data ]
Help messages when build with NO_LIBBPF:
# ./perf record -h
--transaction sample transaction flags (special events only)
--vmlinux <file> vmlinux pathname
(not built-in because NO_LIBBPF=1)
# ./perf record --vmlinux /tmp/vmlinux ls /
Warning: option `vmlinux' is being ignored because NO_LIBBPF=1
...
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.011 MB perf.data (11 samples) ]
Help messages when build with NO_DWARF:
# ./perf record -h
--transaction sample transaction flags (special events only)
--vmlinux <file> vmlinux pathname
(not built-in because NO_DWARF=1)
Signed-off-by: He Kuang <hekuang@huawei.com> Cc: Alexei Starovoitov <ast@kernel.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Cc: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1450089563-122430-15-git-send-email-wangnan0@huawei.com Signed-off-by: Wang Nan <wangnan0@huawei.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Wang Nan [Mon, 14 Dec 2015 10:39:22 +0000 (10:39 +0000)]
perf tools: Make options always available, even if required libs not linked
This patch keeps options of perf builtins same in all conditions. If
one option is disabled because of compiling options, users should be
notified.
Masami suggested another implementation in [1] that, by adding a
OPTION_NEXT_DEPENDS option before those options in the 'struct option'
array, options parser knows an option is disabled. However, in some
cases this array is reordered (options__order()). In addition, in
parse-option.c that array is const, so we can't simply merge
information in decorator option into the affacted option.
This patch chooses a simpler implementation that, introducing a
set_option_nobuild() function and two option parsing flags. Builtins
with such options should call set_option_nobuild() before option
parsing. The complexity of this patch is because we want some of options
can be skipped safely. In this case their arguments should also be
consumed.
Options in 'perf record' and 'perf probe' are fixed in this patch.
Josh Poimboeuf [Mon, 14 Dec 2015 04:18:09 +0000 (22:18 -0600)]
perf tools: Move help_unknown_cmd() to its own file
help_unknown_cmd() is quite perf-specific because it relies on some
perf_config*() functions. Move it and its supporting functions out into
a separate file so that help.c can be moved to a library.
Josh Poimboeuf [Mon, 14 Dec 2015 04:18:03 +0000 (22:18 -0600)]
perf test: Add Build file to dependencies for llvm-src-*.c
Because the Build file writes source code to the generated llvm-src-*.c
files, it should be listed as one of the dependencies, so that any
future changes to the code being echoed won't require a 'make clean'.
Namhyung Kim [Mon, 14 Dec 2015 03:11:13 +0000 (12:11 +0900)]
perf test: Fix hist testcases when kptr_restrict is on
Currently if kptr_restrict is enabled, all hist tests failed with
segfaults. This is because machine__create_kernel_maps() in
setup_fake_machine() failed in that situation, and it called
machine__delete() on the error path. But outer callers again called
machines__exit() causing double free for the host machine.
Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1450062673-22312-1-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Andi Kleen [Sat, 12 Dec 2015 00:12:24 +0000 (16:12 -0800)]
perf evsel: Disable branch flags/cycles for --callgraph lbr
[The kernel patch needed for this is in tip now (b16a5b52eb9 perf/x86:
Add option to disable ...) So this user tools patch to make use of it
should be merged now]
Automatically disable collecting branch flags and cycles with
--call-graph lbr. This allows avoiding a bunch of extra MSR
reads in the PMI on Skylake.
When the kernel doesn't support the new flags they are automatically
cleared in the fallback code.
v2: Switch to use branch_sample_type instead of sample_type.
Adjust description.
Fix the fallback logic.
If any reference is made to that 'thread' variable, it better use
thread__get(thread) to hold a reference.
We were returning with thread->refcnt set to zero, fix it and some cases
where thread__delete() was being called, which were not a problem
because just one reference was being used, now that we set it to 1, use
thread__put() instead.
Reported-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-4b9mkuk66to4ecckpmpvqx6s@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
perf test: Dump the stack when test segfaults when in verbose mode
E.g.:
# perf test 26
26: Test mmap thread lookup : FAILED!
# perf test -v 26
26: Test mmap thread lookup :
--- start ---
test child forked, pid 9269
tid = 9269, map = 0x7ff99ff0c000
tid = 9270, map = 0x7ff99ff0b000
tid = 9271, map = 0x7ff99ff0a000
tid = 9272, map = 0x7ff99ff09000
perf: Segmentation fault
Obtained 13 stack frames.
perf(sighandler_dump_stack+0x41) [0x4e3541]
/lib64/libc.so.6(+0x34960) [0x7ff99d5f6960]
perf(thread__put+0x5b) [0x4c6f6b]
perf(machine__process_event+0x14e) [0x4bd37e]
perf(perf_event__synthesize_threads+0x3aa) [0x48678a]
perf(test__mmap_thread_lookup+0x20a) [0x474e0a]
perf() [0x460d56]
perf(cmd_test+0x589) [0x461319]
perf() [0x47c641]
perf(main+0x617) [0x422317]
/lib64/libc.so.6(__libc_start_main+0xf0) [0x7ff99d5e1fe0]
perf() [0x422429]
[(nil)]
test child interrupted
---- end ----
Test mmap thread lookup: FAILED!
#
Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-sypazzsl4ptctrmlyi2zcmaj@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
perf tools: Use same signal handling strategy as 'record'
I.e. don't exit with the signal number, instead set the signal handler
to the default one and then raise it again.
Noticed while trying to dump the stack at segfaults in the 'perf test'
forked process used to run each test, that inspects signal info at
each test.
Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-5x5r176wnoqxi5p6id05wv9w@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Peter Zijlstra [Sun, 13 Dec 2015 21:11:16 +0000 (22:11 +0100)]
sched/wait: Fix the signal handling fix
Jan Stancek reported that I wrecked things for him by fixing things for
Vladimir :/
His report was due to an UNINTERRUPTIBLE wait getting -EINTR, which
should not be possible, however my previous patch made this possible by
unconditionally checking signal_pending().
We cannot use current->state as was done previously, because the
instruction after the store to that variable it can be changed. We must
instead pass the initial state along and use that.
Fixes: 68985633bccb ("sched/wait: Fix signal handling in bit wait helpers") Reported-by: Jan Stancek <jstancek@redhat.com> Reported-by: Chris Mason <clm@fb.com> Tested-by: Jan Stancek <jstancek@redhat.com> Tested-by: Vladimir Murzin <vladimir.murzin@arm.com> Tested-by: Chris Mason <clm@fb.com> Reviewed-by: Paul Turner <pjt@google.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: tglx@linutronix.de Cc: Oleg Nesterov <oleg@redhat.com> Cc: hpa@zytor.com Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Sun, 13 Dec 2015 20:41:10 +0000 (12:41 -0800)]
Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer fixlets from Thomas Gleixner:
"Two trivial fixes which add missing header fileas and forward
declarations so the code will compile even when the magic include
chains are different"
* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
irqchip/gic-v3: Add missing include for barrier.h
irqchip/gic-v3: Add missing struct device_node declaration
Linus Torvalds [Sun, 13 Dec 2015 20:29:22 +0000 (12:29 -0800)]
Merge tag 'char-misc-4.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull fpga driver fixes from Greg KH:
"Only two small fpga driver fixes here, both have been in linux-next
for a while, and resolve some reported issues"
* tag 'char-misc-4.4-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
fpga manager: Fix firmware resource leak on error
fpga manager: remove label
projects / linux-beck.git / log