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2011-12-23perf: builtin-record: Document and check that mmap_pages must be a power of two.Nelson Elhage4-1/+17
Now that we automatically point users at it, let's provide them some guidance so that they hopefully don't just get mysterious EINVAL's from the kernel. Cc: Ingo Molnar <mingo@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1324301972-22740-4-git-send-email-nelhage@nelhage.com Signed-off-by: Nelson Elhage <nelhage@nelhage.com> [ committer note: Made it work after 50a682c ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-12-23perf: builtin-record: Provide advice if mmap'ing fails with EPERM.Nelson Elhage1-1/+8
This failure is most likely due to running up against the kernel.perf_event_mlock_kb sysctl, so we can tell the user what to do to fix the issue. Cc: Ingo Molnar <mingo@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1324301972-22740-3-git-send-email-nelhage@nelhage.com Signed-off-by: Nelson Elhage <nelhage@nelhage.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-12-23perf tools: Fix truncated annotationIngo Molnar1-1/+1
I get such truncated annotation results in 'perf top': : Disassembly of section .text: ▒ : ▒ : ffffffff810966a8 <nr_iowait_cpu>: ▒ 4.94 : ffffffff810966a8: movslq %edi,%rdi ▒ 3.70 : ffffffff810966ab: mov $0x13700,%rax ▒ 0.00 : ffffffff810966b2: add -0x7e32cb00(,%rdi,8),%rax ▒ 8.64 : ffffffff810966ba: mov 0x7e0(%rax),%eax ▒ 82.72 : ffffffff810966c0: cltq ▒ Note the missing 'retq' which is there in the original function: ffffffff810966a8 <nr_iowait_cpu>: ffffffff810966a8: 48 63 ff movslq %edi,%rdi ffffffff810966ab: 48 c7 c0 00 37 01 00 mov $0x13700,%rax ffffffff810966b2: 48 03 04 fd 00 35 cd add -0x7e32cb00(,%rdi,8),%rax ffffffff810966b9: 81 ffffffff810966ba: 8b 80 e0 07 00 00 mov 0x7e0(%rax),%eax ffffffff810966c0: 48 98 cltq ffffffff810966c2: c3 retq ffffffff810966c3 <this_cpu_load>: I'm using a fairly recent binutils: GNU objdump version 2.21.51.0.6-2.fc16 20110118 AFAICS the bug is simply that sym->end points to the last byte of the symbol in question - while objdump's --stop-address expects the last byte plus 1 to disassemble the full range. Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/20111223130804.GA24305@elte.hu Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-12-23perf script: look up thread using tid instead of pidDavid Ahern1-1/+1
This allows the thread name to be dispalyed when dumping events: myapp 25118 [000] 450385.538815: context-switches ... myapp:worker 25119 [000] 450385.538894: context-switches ... Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1324578603-12762-4-git-send-email-dsahern@gmail.com Signed-off-by: David Ahern <dsahern@gmail.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-12-23perf tools: Look up thread names for system wide profilingDavid Ahern1-22/+53
This handles multithreaded processes with named threads when doing system wide profiling: the comm for each thread is looked up allowing them to be different from the thread group leader. v2: - fixed sizeof arg to perf_event__get_comm_tgid Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1324578603-12762-3-git-send-email-dsahern@gmail.com Signed-off-by: David Ahern <dsahern@gmail.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-12-23perf tools: Fix comm for processes with named threadsDavid Ahern1-5/+32
perf does not properly handle monitoring of processes with named threads. For example: $ ps -C myapp -L PID LWP TTY TIME CMD 25118 25118 ? 00:00:00 myapp 25118 25119 ? 00:00:00 myapp:worker perf record -e cs -c 1 -fo /tmp/perf.data -p 25118 -- sleep 10 perf report --stdio -i /tmp/perf.data 100.00% myapp:worker [kernel.kallsyms] [k] perf_event_task_sched_out The process name is set to the name of the last thread it finds for the process. The Problem: perf-top and perf-record both create a thread_map of threads to be monitored. That map is used in perf_event__synthesize_thread_map which loops over the entries in thread_map and calls __event__synthesize_thread to generate COMM and MMAP events. __event__synthesize_thread calls perf_event__synthesize_comm which opens /proc/pid/status, reads the name of the task and its thread group id. That's all fine. The problem is that it then reads /proc/pid/task and generates COMM events for each task it finds - but using the name found in /proc/pid/status where pid is the thread of interest. The end result (looping over thread_map + synthesizing comm events for each thread each time) means the name of the last thread processed sets the name for all threads in the process - which is not good for multithreaded processes with named threads. The Fix: perf_event__synthesize_comm has an input argument (full) that decides whether to process task entries for each pid it is passed. It currently never set to 0 (perf_event__synthesize_comm has a single caller and it always passes the value 1). Let's fix that. Add the full input argument to __event__synthesize_thread which passes it to perf_event__synthesize_comm. For thread/process monitoring set full to 0 which means COMM and MMAP events are only generated for the pid passed to it. For system wide monitoring set full to 1 so that COMM events are generated for all threads in a process. Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1324578603-12762-2-git-send-email-dsahern@gmail.com Signed-off-by: David Ahern <dsahern@gmail.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-12-22perf report: Fix usage stringNamhyung Kim1-1/+1
perf report does not take a command from command line. Cc: Ingo Molnar <mingo@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1323703017-6060-8-git-send-email-namhyung@gmail.com Signed-off-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-12-21perf: Add support for PERF_HW_COUNT_REF_CPU_CYCLESStephane Eranian1-0/+2
Add new generic hw event: ref-cycles, which maps to PERF_HW_COUNT_REF_CPUCYCLES: $ perf stat -e ref-cycles ls Signed-off-by: Stephane Eranian <eranian@google.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1323559734-3488-5-git-send-email-eranian@google.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-12-20Merge branch 'perf/core' of git://github.com/acmel/linux into perf/coreIngo Molnar12-24/+160
2011-12-20Merge commit 'v3.2-rc6' into perf/coreIngo Molnar2-2/+3
Merge reason: Update with the latest fixes. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-12-20perf test: Add more automated tests for event parsingJiri Olsa1-1/+126
Adding automated tests for event parsing to include testing for modifier and ',' operator. Cc: Ingo Molnar <mingo@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: cjashfor@linux.vnet.ibm.com Link: http://lkml.kernel.org/r/1323963039-7602-4-git-send-email-jolsa@redhat.com Signed-off-by: Jiri Olsa <jolsa@redhat.com> [ committer note: Remove some tests that need group_leader & bison patchkits ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-12-20perf events: Tidy up perf_event__preprocess_sampleNamhyung Kim1-6/+7
Use local variable 'dso' to reduce typing a bit and rearrange the if condition. Also NULL check of al->map in the condition is not necessary. Cc: Ingo Molnar <mingo@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1323703017-6060-7-git-send-email-namhyung@gmail.com Signed-off-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-12-20perf tools: Remove stale git headlines from top commentNamhyung Kim2-2/+8
These files are part of PERF not GIT although they're come from there :) Cc: Ingo Molnar <mingo@elte.hu> Cc: Johannes Schindelin <Johannes.Schindelin@gmx.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1323784323-2150-1-git-send-email-namhyung@gmail.com Signed-off-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-12-20perf tools: Fix a memory leak on perf_read_values_destroyNamhyung Kim1-0/+1
After freeing each elements of the @values->value, we should free itself too. Cc: Ingo Molnar <mingo@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1323703017-6060-5-git-send-email-namhyung@gmail.com Signed-off-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-12-20perf symbols: Fix error path on symbol__init()Namhyung Kim1-2/+2
The order of freeing comm_list and dso_list should be reversed. Cc: Ingo Molnar <mingo@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1323703017-6060-4-git-send-email-namhyung@gmail.com Signed-off-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-12-20perf symbols: Get rid of duplicated snprintf()Namhyung Kim1-6/+1
The 'path' variable is set on a upper line, don't need to do it again. Cc: Ingo Molnar <mingo@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1323703017-6060-3-git-send-email-namhyung@gmail.com Signed-off-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-12-20perf evlist: Fix errno value reporting on failed mmapNelson Elhage1-1/+3
On failure, perf_evlist__mmap_per_{cpu,thread} will try to munmap() every map that doesn't have a NULL base. This will fail with EINVAL if one of them has base == MAP_FAILED, clobbering errno, so that perf_evlist__map will return EINVAL on any failure regardless of the root cause. Fix this by resetting failed maps to a NULL base. Acked-by: Namhyung Kim <namhyung@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1324301972-22740-2-git-send-email-nelhage@nelhage.com Signed-off-by: Nelson Elhage <nelhage@nelhage.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-12-20perf report: Document '--call-graph' for optional print_limit argumentNamhyung Kim2-5/+6
The '--call-graph' command line option can receive undocumented optional print_limit argument. Besides, use strtoul() to parse the option since its type is u32. Cc: Ingo Molnar <mingo@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1323703017-6060-2-git-send-email-namhyung@gmail.com Signed-off-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-12-20perf evsel: Fix uninitialized memory access to struct perf_sampleRobert Richter1-1/+1
Memory in struct perf_sample is not fully initialized during parsing. Depending on sampling data some parts may left unchanged. Zero out struct perf_sample first to avoid access to uninitialized memory. Cc: Ingo Molnar <mingo@elte.hu> Link: http://lkml.kernel.org/r/1323966762-8574-2-git-send-email-robert.richter@amd.com Signed-off-by: Robert Richter <robert.richter@amd.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-12-20perf record: Add ability to record event periodAndrew Vagin3-0/+5
The problem is that when SAMPLE_PERIOD is not set, the kernel generates a number of samples in proportion to an event's period. Number of these samples may be too big and the kernel throttles all samples above a defined limit. E.g.: I want to trace when a process sleeps. I created a process which sleeps for 1ms and for 4ms. perf got 100 events in both cases. swapper 0 [000] 1141.371830: sched_stat_sleep: comm=foo pid=1801 delay=1386750 [ns] swapper 0 [000] 1141.369444: sched_stat_sleep: comm=foo pid=1801 delay=4499585 [ns] In the first case a kernel want to send 4499585 events and in the second case it wants to send 1386750 events. perf-reports shows that process sleeps in both places equal time. Instead of this we can get only one sample with an attribute period. As result we have less data transferring between kernel and user-space and we avoid throttling of samples. The patch "events: Don't divide events if it has field period" added a kernel part of this functionality. Acked-by: Arun Sharma <asharma@fb.com> Cc: Arun Sharma <asharma@fb.com> Cc: David Ahern <dsahern@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: devel@openvz.org Link: http://lkml.kernel.org/r/1324391565-1369947-1-git-send-email-avagin@openvz.org Signed-off-by: Andrew Vagin <avagin@openvz.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-12-12perf tools: Add ability to synthesize event according to a sampleAndrew Vagin3-0/+90
It's the counterpart of perf_session__parse_sample. v2: fixed mistakes found by David Ahern. v3: s/data/sample/ s/perf_event__change_sample/perf_event__synthesize_sample Reviewed-by: David Ahern <dsahern@gmail.com> Cc: Arun Sharma <asharma@fb.com> Cc: David Ahern <dsahern@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: devel@openvz.org Link: http://lkml.kernel.org/r/1323266161-394927-3-git-send-email-avagin@openvz.org Signed-off-by: Andrew Vagin <avagin@openvz.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-12-12perf script: Implement option for system-wide profilingRobert Richter1-5/+10
The option is documented in man perf-script but was not yet implemented: -a Force system-wide collection. Scripts run without a <command> normally use -a by default, while scripts run with a <command> normally don't - this option allows the latter to be run in system-wide mode. As with perf record you now can profile in system-wide mode for the runtime of a given command, e.g.: # perf script -a syscall-counts sleep 2 Cc: Ingo Molnar <mingo@elte.hu> Link: http://lkml.kernel.org/r/1322229925-10075-1-git-send-email-robert.richter@amd.com Signed-off-by: Robert Richter <robert.richter@amd.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-12-12perf script: Fix mem leaks and NULL pointer checks around strdup()sRobert Richter1-19/+29
Fix mem leaks and missing NULL pointer checks after strdup(). And get_script_path() did not free __script_root in case of continue. Introduce a helper function get_script_root(). Cc: Ingo Molnar <mingo@elte.hu> Link: http://lkml.kernel.org/r/1322217520-3287-1-git-send-email-robert.richter@amd.com Signed-off-by: Robert Richter <robert.richter@amd.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-12-08Merge branch 'perf/urgent' of git://github.com/acmel/linux into perf/urgentIngo Molnar2-2/+3
2011-12-06perf header: Use event_name() to get an event nameAndrew Vagin1-1/+1
perf_evsel.name may be not initialized Cc: David Ahern <dsahern@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arun Sharma <asharma@fb.com> Cc: devel@openvz.org Link: http://lkml.kernel.org/r/1322471015-107825-2-git-send-email-avagin@openvz.org Signed-off-by: Andrew Vagin <avagin@openvz.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-12-06Merge branch 'perf/urgent' into perf/coreIngo Molnar4-12/+14
Merge reason: Add these cherry-picked commits so that future changes on perf/core don't conflict. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2011-12-05perf: Fix parsing of __print_flags() in TP_printk()Steven Rostedt1-0/+2
A update is made to the sched:sched_switch event that adds some logic to the first parameter of the __print_flags() that shows the state of tasks. This change cause perf to fail parsing the flags. A simple fix is needed to have the parser be able to process ops within the argument. Cc: stable@vger.kernel.org Reported-by: Andrew Vagin <avagin@openvz.org> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2011-12-05perf stat: Failure with "Operation not supported"Anton Blanchard1-1/+2
perf stat is failing on PowerPC: Error: open_counter returned with 95 (Operation not supported). /bin/dmesg may provide additional information. Fatal: Not all events could be opened. commit 370faf1dd046 (perf stat: Fail softly on unsupported events) added a check for failure returning ENOENT, but the POWER backend returns EOPNOTSUPP. It looks like alpha, blackfin and mips do the same. With the patch applied, things work as expected: Performance counter stats for '/bin/true': 0.362176 task-clock # 0.623 CPUs utilized 0 context-switches # 0.000 M/sec 0 CPU-migrations # 0.000 M/sec 28 page-faults # 0.077 M/sec 1,677,020 cycles # 4.630 GHz <not supported> stalled-cycles-frontend <not supported> stalled-cycles-backend 431,220 instructions # 0.26 insns per cycle 101,889 branches # 281.325 M/sec 4,145 branch-misses # 4.07% of all branches 0.000581361 seconds time elapsed Cc: <stable@kernel.org> # 3.0+ Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/20111202093833.5fef7226@kryten Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-12-02perf test: Soft errors shouldn't stop the "Validate PERF_RECORD_" testArnaldo Carvalho de Melo1-24/+21
For errors that don't preclude checking for further errors, aka "soft" errors, just continue testing for other errors. Better coverage in verbose mode. Suggested-by: David Ahern <dsahern@gmail.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-jafcokbj26m845dsgm2hx6az@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-12-02perf test: Validate PERF_RECORD_ events and perf_sample fieldsArnaldo Carvalho de Melo1-0/+337
This new test will validate these new routines extracted from 'perf record': - perf_evlist__config_attrs - perf_evlist__prepare_workload - perf_evlist__start_workload In addition to several other perf_evlist methods. It consists of starting a simple workload, setting up just one event to monitor ("cycles") requesting that several PERF_SAMPLE_ fields be present in all events. It then will check that the expected PERF_RECORD_ events are produced and will sanity check all its fields. Some checks performed: . PERF_SAMPLE_TIME monotonically increases. . PERF_SAMPLE_CPU is the one requested with sched_setaffinity . PERF_SAMPLE_TID and PERF_SAMPLE_PID matches the one we forked in perf_evlist__prepare_workload and that is stored in evlist->workload.pid . For the events where these fields are also present in its pre-sample_id_all fields (e.g. event->mmap.pid), that they are what is expected too. . That we get a bunch of mmaps: PATH/libcSUFFIX PATH/ldSUFFIX [vdso] PATH/sleep Example: [root@emilia ~]# taskset -c 3,4 perf test -v1 perf_sample 6: Validate PERF_RECORD_* events & perf_sample fields: --- start --- 7159480799825 3 PERF_RECORD_SAMPLE 7159480805584 3 PERF_RECORD_SAMPLE 7159480807814 3 PERF_RECORD_SAMPLE 7159480810430 3 PERF_RECORD_SAMPLE 7159480861511 3 PERF_RECORD_MMAP 8086/8086: [0x7fffffffd000(0x2000) @ 0x7fffffffd000]: //anon 7159481052516 3 PERF_RECORD_COMM: sleep:8086 7159481070188 3 PERF_RECORD_MMAP 8086/8086: [0x400000(0x6000) @ 0]: /bin/sleep 7159481077104 3 PERF_RECORD_MMAP 8086/8086: [0x3d06400000(0x221000) @ 0]: /lib64/ld-2.12.so 7159481092912 3 PERF_RECORD_MMAP 8086/8086: [0x7fff1adff000(0x1000) @ 0x7fff1adff000]: [vdso] 7159481196779 3 PERF_RECORD_MMAP 8086/8086: [0x3d06800000(0x37f000) @ 0]: /lib64/libc-2.12.so 7160481558435 3 PERF_RECORD_EXIT(8086:8086):(8086:8086) ---- end ---- Validate PERF_RECORD_* events & perf_sample fields: Ok [root@emilia ~]# Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-svag18v2z4idas0dyz3umjpq@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-12-02perf event: Introduce perf_event__fprintfArnaldo Carvalho de Melo2-6/+54
So that tools like 'perf test' can print the events when in verbose mode, for instance. Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-xnovdqfi25nc48gy6604k7yp@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-11-29perf test: Allow running just a subset of the available testsArnaldo Carvalho de Melo2-22/+67
To obtain a list of available tests: [root@emilia linux]# perf test list 1: vmlinux symtab matches kallsyms 2: detect open syscall event 3: detect open syscall event on all cpus 4: read samples using the mmap interface 5: parse events tests [root@emilia linux]# To list just a subset: [root@emilia linux]# perf test list syscall 2: detect open syscall event 3: detect open syscall event on all cpus [root@emilia linux]# To run a subset: [root@emilia linux]# perf test detect 2: detect open syscall event: Ok 3: detect open syscall event on all cpus: Ok [root@emilia linux]# Specific tests can be chosen by number: [root@emilia linux]# perf test 1 3 parse 1: vmlinux symtab matches kallsyms: Ok 3: detect open syscall event on all cpus: Ok 5: parse events tests: Ok [root@emilia linux]# Now to write more tests! Suggested-by: Peter Zijlstra <peterz@infradead.org> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-nqec2145qfxdgimux28aw7v8@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-11-29perf evlist: Always do automatic allocation of pollfd and mmap structuresArnaldo Carvalho de Melo5-27/+7
At first tools were required to do that, but while writing the python bindings to simplify the API I made them auto-allocate when needed. This just makes record, stat and top use that auto allocation, simplifying them a bit. Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-iokhcvkzzijr3keioubx8hlq@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-11-28perf tools: Save some loops using perf_evlist__id2evselArnaldo Carvalho de Melo5-75/+136
Since we already ask for PERF_SAMPLE_ID and use it to quickly find the associated evsel, add handler func + data to struct perf_evsel to avoid using chains of if(strcmp(event_name)) and also to avoid all the linear list searches via trace_event_find. To demonstrate the technique convert 'perf sched' to it: # perf sched record sleep 5m And then: Performance counter stats for '/tmp/oldperf sched lat': 646.929438 task-clock # 0.999 CPUs utilized 9 context-switches # 0.000 M/sec 0 CPU-migrations # 0.000 M/sec 20,901 page-faults # 0.032 M/sec 1,290,144,450 cycles # 1.994 GHz <not supported> stalled-cycles-frontend <not supported> stalled-cycles-backend 1,606,158,439 instructions # 1.24 insns per cycle 339,088,395 branches # 524.151 M/sec 4,550,735 branch-misses # 1.34% of all branches 0.647524759 seconds time elapsed Versus: Performance counter stats for 'perf sched lat': 473.564691 task-clock # 0.999 CPUs utilized 9 context-switches # 0.000 M/sec 0 CPU-migrations # 0.000 M/sec 20,903 page-faults # 0.044 M/sec 944,367,984 cycles # 1.994 GHz <not supported> stalled-cycles-frontend <not supported> stalled-cycles-backend 1,442,385,571 instructions # 1.53 insns per cycle 308,383,106 branches # 651.195 M/sec 4,481,784 branch-misses # 1.45% of all branches 0.474215751 seconds time elapsed [root@emilia ~]# Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-1kbzpl74lwi6lavpqke2u2p3@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-11-28perf script: Add comm filtering optionDavid Ahern2-0/+17
Allows collecting events system wide and then pulling out events for a specific task name(s). e.g, perf script -c gnome-shell,gnome-terminal Applies on top of: https://lkml.org/lkml/2011/11/13/74 v2->v3 - update Documentation v1->v2 - use comm_list from symbol_conf Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1321894972-24246-1-git-send-email-dsahern@gmail.com Signed-off-by: David Ahern <dsahern@gmail.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-11-28perf tools: make -C consistent across commands (for cpu list arg)David Ahern6-8/+8
Currently the meaning of -C varies by perf command: for perf-top, perf-stat, perf-record it means cpu list. For perf-report it means comm list. Then perf-annotate, perf-report and perf-script use -c for cpu list. Fix annotate, report and script to use -C for cpu list to be consistent with top, stat and record. This means report needs to use -c for comm list which does introduce a backward compatibility change. v1 -> v2 - update perf-script.txt too Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1321209008-7004-1-git-send-email-dsahern@gmail.com Signed-off-by: David Ahern <dsahern@gmail.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-11-28perf top: Stop using globals for tool stateArnaldo Carvalho de Melo2-235/+245
Use its 'perf_tool' base class instead. Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-i33q40wwvk2zna8fd36ex6sm@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-11-28perf tools: Rename perf_event_ops to perf_toolArnaldo Carvalho de Melo22-277/+301
To better reflect that it became the base class for all tools, that must be in each tool struct and where common stuff will be put. Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-qgpc4msetqlwr8y2k7537cxe@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-11-28perf tools: Resolve machine earlier and pass it to perf_event_opsArnaldo Carvalho de Melo24-375/+376
Reducing the exposure of perf_session further, so that we can use the classes in cases where no perf.data file is created. Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-stua66dcscsezzrcdugvbmvd@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-11-28perf tools: Pass tool context in the the perf_event_ops functionsArnaldo Carvalho de Melo20-373/+520
So that we don't need to have that many globals. Next steps will remove the 'session' pointer, that in most cases is not needed. Then we can rename perf_event_ops to 'perf_tool' that better describes this class hierarchy. Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-wp4djox7x6w1i2bab1pt4xxp@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-11-28perf annotate: Group options in a structArnaldo Carvalho de Melo1-31/+33
Paving the way to remove these globals when we change the perf_event_ops to receive as a first parameter a pointer to a perf_event_ops that will then provide access to perf_annotate via container_of. Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-xduzibqrdg3h5cttmk6p5wwc@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-11-28perf report: Group options in a structArnaldo Carvalho de Melo1-52/+59
Paving the way to remove these globals when we change the perf_event_ops to receive as a first parameter a pointer to a perf_event_ops that will then provide access to perf_report via container_of. Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-2eh2vi2nb5z3tg1lvoxv09xu@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-11-28perf tools: Use evsel->attr.sample_type instead of session->sample_typeArnaldo Carvalho de Melo2-6/+8
Eventually session->sample_type will go away as we want to support multiple sample types per session, so use it from the evsel which is a step in that direction. Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-0vwdpjcwbjezw459lw5n3ew1@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-11-28perf session: Remove superfluous callchain_cursor memberArnaldo Carvalho de Melo5-14/+14
Since we have it in evsel->hists.callchain_cursor, remove it from perf_session. One more step in disentangling several places from requiring a perf_session pointer. Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-rxr5dj3di7ckyfmnz0naku1z@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-11-28perf event: perf_event_ops->attr() manipulates only an evlistArnaldo Carvalho de Melo5-17/+34
Removing another case where a perf_session is required when processing events. Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-ug1wtjbnva4bxwknflkkrlrh@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-11-28perf evlist: Introduce id_hdr_size method out of perf_sessionArnaldo Carvalho de Melo3-28/+34
We will need this when not using perf_session in cases like 'perf top' and strace where no perf.data file is created nor consumed. Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-za923wjc41q5xot5vrhuhj3j@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-11-28perf symbols: Add nr_events to symbol_confArnaldo Carvalho de Melo10-37/+30
Since symbol__alloc_hists need it, to avoid passing it around in many functions have it in the symbol_conf struct. Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-cwv8ysvpywzjq4v3xtbd4zwv@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-11-28perf ui progress: Fix divide by zeroArnaldo Carvalho de Melo1-0/+3
Happens in a perf.data file where one of the events had no samples. Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-j7st3oyiotvfxqde2nc41kxb@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-11-28perf record: Move 'group' to perf_event_opsArnaldo Carvalho de Melo2-5/+5
Will be used in other tools to share the command line parsing code. Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-8x0yr77r6lrd2t699s499m8n@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2011-11-28perf session: Move threads to struct machineArnaldo Carvalho de Melo6-15/+58
The 'machine' abstraction was introduced with 'perf kvm' where we could have samples for the host and multiple guests, but at the time we ended up keeping the list of all machines threads all in session->host_machine. Move the threads rb_tree to struct machine to separate the namespaces. Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-mdg7sm6j3va09vtgj49gbsrp@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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