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2015-12-17perf stat record: Add record commandJiri Olsa
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: $ perf stat record usleep 1 Performance counter stats for 'usleep 1': 0.630237 task-clock (msec) # 0.528 CPUs utilized 1 context-switches # 0.002 M/sec 0 cpu-migrations # 0.000 K/sec 52 page-faults # 0.083 M/sec 978,312 cycles # 1.552 GHz 671,931 stalled-cycles-frontend # 68.68% frontend cycles idle <not supported> stalled-cycles-backend 646,379 instructions # 0.66 insns per cycle # 1.04 stalled cycles per insn 131,046 branches # 207.931 M/sec 7,073 branch-misses # 5.40% of all branches 0.001193240 seconds time elapsed $ 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: $ perf stat record usleep 1 Performance counter stats for 'usleep 1': 0.600796 task-clock (msec) # 0.478 CPUs utilized 1 context-switches # 0.002 M/sec 0 cpu-migrations # 0.000 K/sec 54 page-faults # 0.090 M/sec 886,844 cycles # 1.476 GHz 582,169 stalled-cycles-frontend # 65.65% frontend cycles idle <not supported> stalled-cycles-backend 638,344 instructions # 0.72 insns per cycle # 0.91 stalled cycles per insn 130,204 branches # 216.719 M/sec 7,500 branch-misses # 5.76% of all branches 0.001255897 seconds time elapsed $ 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>
2015-12-17perf tools: Introduce stat perf.data header featureJiri Olsa
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>
2015-12-17perf report: Display newly added events in raw dumpJiri Olsa
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>
2015-12-17perf tools: Add perf_event__fprintf_event_update functionJiri Olsa
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>
2015-12-17perf tools: Add event_update event cpus typeJiri Olsa
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>
2015-12-17perf tools: Add event_update event name typeJiri Olsa
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>
2015-12-17perf tools: Add event_update event scale typeJiri Olsa
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>
2015-12-17perf tools: Add event_update event unit typeJiri Olsa
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>
2015-12-17perf tools: Add event_update user level eventJiri Olsa
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>
2015-12-17perf tools: Add stat events fprintf functionsJiri Olsa
Introducing the following functions to display the stat events for raw dump. perf_event__fprintf_stat perf_event__fprintf_stat_round perf_event__fprintf_stat_config 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>
2015-12-17perf tools: Add stat round event synthesize functionJiri Olsa
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>
2015-12-17perf tools: Add stat round user level eventJiri Olsa
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>
2015-12-17perf tools: Add stat event read functionJiri Olsa
Introducing the perf_event__process_stat_event function to process a 'struct perf_stat' data from a stat 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/1445784728-21732-17-git-send-email-jolsa@kernel.org [ Renamed 'stat' parameter to 'st' to fix 'already defined' build error with older distros (e.g. RHEL6.7) ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-17perf tools: Add stat event synthesize functionJiri Olsa
Introduce the perf_event__synthesize_stat function to synthesize a 'struct stat_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/1445784728-21732-16-git-send-email-jolsa@kernel.org [ Renamed 'stat' parameter to 'st' to fix 'already defined' build error with older distros (e.g. RHEL6.7) ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-17perf tools: Add stat user level eventJiri Olsa
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>
2015-12-17perf tools: Add stat config event read functionJiri Olsa
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>
2015-12-17perf tools: Add stat config event synthesize functionJiri Olsa
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>
2015-12-17perf tools: Add stat config user level eventJiri Olsa
Adding the stat config event to pass/store stat config data, so report tools (report/script) know how to interpret stat data. The config data is stored in a 'tag|value' way to allow for easy extension and backwards compatibility. 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/1445784728-21732-12-git-send-email-jolsa@kernel.org [ stat_config_term_event -> stat_config_event_entry ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-17perf cpu_map: Add perf_event__fprintf_cpu_map functionJiri Olsa
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>
2015-12-17perf cpu_map: Add cpu_map__new_event functionJiri Olsa
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>
2015-12-17perf cpu_map: Add cpu_map event synthesize functionJiri Olsa
Introduce the perf_event__synthesize_cpu_map function to synthesize a struct cpu_map. Added generic interface: cpu_map_data__alloc cpu_map_data__synthesize 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>
2015-12-17perf cpu_map: Add cpu_map user level eventJiri Olsa
Adding the cpu_map event to pass/store cpu maps as data in a pipe/perf.data. We store maps in 2 formats: - list of cpus - mask of cpus The format that takes less space is selected transparently in the following patch. The interface is made generic, so we could add the cpumap event data into another event in the following patches. 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/1445784728-21732-8-git-send-email-jolsa@kernel.org [ cpu_map_data_cpus -> cpu_map_entries, cpu_map_data_mask -> cpu_map_mask ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-17perf thread_map: Add perf_event__fprintf_thread_map functionJiri Olsa
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>
2015-12-17perf thread_map: Add thread_map__new_event functionJiri Olsa
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>
2015-12-17perf thread_map: Add thread_map event sythesize functionJiri Olsa
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>
2015-12-17perf thread_map: Add thread_map user level eventJiri Olsa
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>
2015-12-17perf subcmd: Create subcmd libraryJosh Poimboeuf
Move the subcommand-related files from perf to a new library named libsubcmd.a. Since we're moving files anyway, go ahead and rename 'exec_cmd.*' to 'exec-cmd.*' to be consistent with the naming of all the other files. Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/c0a838d4c878ab17fee50998811612b2281355c1.1450193761.git.jpoimboe@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-17perf tools: Finalize subcmd independenceJosh Poimboeuf
For the files that will be moved to the subcmd library, remove all their perf-specific includes and duplicate any needed functionality. Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/6e12946f0f26ce4d543d34db68d9dae3c8551cb9.1450193761.git.jpoimboe@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-16perf tools: Remove 'perf' from subcmd function and variable namesJosh Poimboeuf
In preparation for moving exec_cmd.c and run-command.c out of perf and into a library, remove 'perf' from all the symbol names. Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/bc3ee82b40b8f396b644fa49e0f7260ce442635b.1450193761.git.jpoimboe@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-16perf tools: Remove subcmd dependencies on strbufJosh Poimboeuf
Introduce and use new astrcat() and astrcatf() functions which replace the strbuf functionality for subcmd. For now they duplicate strbuf's die-on-allocation-error policy. Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/957d207e1254406fa11fc2e405e75a7e405aad8f.1450193761.git.jpoimboe@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-16perf tools: Provide subcmd configuration at runtimeJosh Poimboeuf
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. Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/21f5f6b38da72c985a8dcfa185700d03e7eecd1d.1450193761.git.jpoimboe@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-16perf tools: Document the fact that parse_options*() may exitJosh Poimboeuf
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. Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/97b1af06cc3b18dd0f49e655d6d659eaa64ecde5.1450193761.git.jpoimboe@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-16perf tools: Move strlcpy() from perf to tools/lib/string.cJosh Poimboeuf
strlcpy() will be needed by the subcmd library. Move it to the shared tools/lib/string.c file which can be used by other tools. Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/71e2804b973bf39ad3d3b9be10f99f2ea630be46.1450193761.git.jpoimboe@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-15perf record: Add record.build-id config optionNamhyung Kim
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>
2015-12-14perf record: Support custom vmlinux pathHe Kuang
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>
2015-12-14perf tools: Make options always available, even if required libs not linkedWang Nan
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. [1] http://lkml.kernel.org/g/50399556C9727B4D88A595C8584AAB3752627CD4@GSjpTKYDCembx32.service.hitachi.net Test result: Normal case: # ./perf probe --vmlinux /tmp/vmlinux sys_write Added new event: probe:sys_write (on sys_write) You can now use it in all perf tools, such as: perf record -e probe:sys_write -aR sleep 1 Build with NO_DWARF=1: # ./perf probe -L sys_write Error: switch `L' is not available because NO_DWARF=1 Usage: perf probe [<options>] 'PROBEDEF' ['PROBEDEF' ...] or: perf probe [<options>] --add 'PROBEDEF' [--add 'PROBEDEF' ...] or: perf probe [<options>] --del '[GROUP:]EVENT' ... or: perf probe --list [GROUP:]EVENT ... or: perf probe [<options>] --funcs -L, --line <FUNC[:RLN[+NUM|-RLN2]]|SRC:ALN[+NUM|-ALN2]> Show source code lines. (not built-in because NO_DWARF=1) # ./perf probe -k /tmp/vmlinux sys_write Warning: switch `k' is being ignored because NO_DWARF=1 Added new event: probe:sys_write (on sys_write) You can now use it in all perf tools, such as: perf record -e probe:sys_write -aR sleep 1 # ./perf probe --vmlinux /tmp/vmlinux sys_write Warning: option `vmlinux' is being ignored because NO_DWARF=1 Added new event: [SNIP] # ./perf probe -l Usage: perf probe [<options>] 'PROBEDEF' ['PROBEDEF' ...] or: perf probe [<options>] --add 'PROBEDEF' [--add 'PROBEDEF' ...] ... -k, --vmlinux <file> vmlinux pathname (not built-in because NO_DWARF=1) -L, --line <FUNC[:RLN[+NUM|-RLN2]]|SRC:ALN[+NUM|-ALN2]> Show source code lines. (not built-in because NO_DWARF=1) ... -V, --vars <FUNC[@SRC][+OFF|%return|:RL|;PT]|SRC:AL|SRC;PT> Show accessible variables on PROBEDEF (not built-in because NO_DWARF=1) --externs Show external variables too (with --vars only) (not built-in because NO_DWARF=1) --no-inlines Don't search inlined functions (not built-in because NO_DWARF=1) --range Show variables location range in scope (with --vars only) (not built-in because NO_DWARF=1) Signed-off-by: Wang Nan <wangnan0@huawei.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.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: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1450089563-122430-14-git-send-email-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-14perf tools: Convert parse-options.c internal functions to staticJosh Poimboeuf
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/c027b5f47ec1055077f5650edb1c7ad37c191e6c.1449965119.git.jpoimboe@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-14perf tools: Move help_unknown_cmd() to its own fileJosh Poimboeuf
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. Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/562d918bcaaf340c1ae3e47586b3f0ae33b9918b.1449965119.git.jpoimboe@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-14perf tools: Remove check for unused PERF_PAGER_IN_USEJosh Poimboeuf
PERF_PAGER_IN_USE doesn't seem to be used anywhere, so let's remove it. This will also make it easier to move pager.c into a separate library. Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/ed9e8370db9811746dc590544cf48c36dcfb1731.1449965119.git.jpoimboe@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-14perf tools: Create pager.hJosh Poimboeuf
Move the 'pager' function prototypes into a new pager.h so that the pager code can be moved out to a library. Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/ba7c316474dd6bfc047e5c6dc4dcab39a982caf5.1449965119.git.jpoimboe@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-14perf build: Rename LIB_PATH -> API_PATHJosh Poimboeuf
'LIB_PATH' is a misnomer because there are multiple library paths. Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/c10df0b749a27f05cc531fe06b8dd71a329341fa.1449965119.git.jpoimboe@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-14perf build: Fix 'make clean'Josh Poimboeuf
Add some missing files to the 'make clean' target. Reported-and-Acked-by: Jiri Olsa <jolsa@kernel.org> Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/8b1f5a5bd66a652be071d423e64aaa994254be31.1449965119.git.jpoimboe@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-14perf test: Remove tarpkg at end of testJosh Poimboeuf
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/5e7e97a23e3ce11b59d1009b39ebb6d2813a0560.1449965119.git.jpoimboe@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-14perf test: Add Build file to dependencies for llvm-src-*.cJosh Poimboeuf
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'. Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/9b9886c295750dc83cbbb29a665d280f9c5e8b3e.1449965119.git.jpoimboe@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-14perf test: Fix hist testcases when kptr_restrict is onNamhyung Kim
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>
2015-12-14perf evsel: Disable branch flags/cycles for --callgraph lbrAndi Kleen
[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. Signed-off-by: Andi Kleen <ak@linux.intel.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Link: http://lkml.kernel.org/r/1449879144-29074-1-git-send-email-andi@firstfloor.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-12-14perf thread: Fix reference count initial stateArnaldo Carvalho de Melo
We should always return from thread__new(), the constructor, with the object with a reference count of one, so that: struct thread *thread = thread__new(); thread__put(thread); Will call thread__delete(). 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>
2015-12-14perf test: Dump the stack when test segfaults when in verbose modeArnaldo Carvalho de Melo
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>
2015-12-14perf tools: Use same signal handling strategy as 'record'Arnaldo Carvalho de Melo
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>
2015-12-11irq_poll: make blk-iopoll available outside the block layerChristoph Hellwig
The new name is irq_poll as iopoll is already taken. Better suggestions welcome. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com>
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