kernel/linux.git/tools/perf/util/trace-event.h, branch v6.4

perf trace: Reduce #ifdefs for TEP_FIELD_IS_RELATIVE

2023-01-19T16:26:28+00:00

Add a helper function that applies the mask to test, or returns false if libtraceevent is too old or not present. Signed-off-by: Ian Rogers Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Athira Jajeev Cc: Eelco Chaudron Cc: German Gomez Cc: Ingo Molnar Cc: Jiri Olsa Cc: Kan Liang Cc: Kim Phillips Cc: Leo Yan Cc: Mark Rutland Cc: Namhyung Kim Cc: Paolo Bonzini Cc: Peter Zijlstra Cc: Sean Christopherson Cc: Stephane Eranian Cc: Yang Jihong Link: https://lore.kernel.org/r/20230111070641.1728726-2-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Remove HAVE_LIBTRACEEVENT_TEP_FIELD_IS_RELATIVE

2023-01-19T16:24:56+00:00

Switch HAVE_LIBTRACEEVENT_TEP_FIELD_IS_RELATIVE to be a version number test on libtraceevent being >= to version 1.5.0. This also corrects a greater-than test to be greater-than-or-equal. Fixes: b9a49f8cb02f0859 ("perf tools: Check if libtracevent has TEP_FIELD_IS_RELATIVE") Signed-off-by: Ian Rogers Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Athira Jajeev Cc: Eelco Chaudron Cc: German Gomez Cc: Ingo Molnar Cc: Jiri Olsa Cc: Kan Liang Cc: Kim Phillips Cc: Leo Yan Cc: Mark Rutland Cc: Namhyung Kim Cc: Paolo Bonzini Cc: Peter Zijlstra Cc: Sean Christopherson Cc: Stephane Eranian Cc: Yang Jihong Link: https://lore.kernel.org/lkml/20221205225940.3079667-3-irogers@google.com/ Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Fix build on uClibc systems by adding missing sys/types.h include

2023-01-04T19:44:01+00:00

Not all libc implementations define ssize_t as part of stdio.h like glibc does since the standard only requires this type to be defined by unistd.h and sys/types.h. For this reason the perf build is currently broken for toolchains based on uClibc, for instance. Include sys/types.h explicitly to fix that. Committer notes: In addition, in the past this worked in uClibc test systems as there was another way to get to sys/types.h that got removed in that cset: tools/perf/util/trace-event.h /usr/include/traceevent/event_parse.h # This got removed from util/trace-event.h in 378ef0f5d9d7f465 /usr/include/regex.h /usr/include/sys/types.h typedef __ssize_t ssize_t; So the size_t that is used in tools/perf/util/trace-event.h was being obtained indirectly, by chance. Fixes: 378ef0f5d9d7f465 ("perf build: Use libtraceevent from the system") Signed-off-by: Jesus Sanchez-Palencia Cc: Alexander Shishkin Cc: Ian Rogers Cc: Jiri Olsa Cc: Mark Rutland Cc: Namhyung Kim Link: http://lore.kernel.org/lkml/20230104193414.606905-1-jesussanp@google.com Signed-off-by: Arnaldo Carvalho de Melo

perf build: Use libtraceevent from the system

2022-12-14T14:16:12+00:00

Remove the LIBTRACEEVENT_DYNAMIC and LIBTRACEFS_DYNAMIC make command line variables. If libtraceevent isn't installed or NO_LIBTRACEEVENT=1 is passed to the build, don't compile in libtraceevent and libtracefs support. This also disables CONFIG_TRACE that controls "perf trace". CONFIG_LIBTRACEEVENT is used to control enablement in Build/Makefiles, HAVE_LIBTRACEEVENT is used in C code. Without HAVE_LIBTRACEEVENT tracepoints are disabled and as such the commands kmem, kwork, lock, sched and timechart are removed. The majority of commands continue to work including "perf test". Committer notes: Fixed up a tools/perf/util/Build reject and added: #include to tools/perf/util/scripting-engines/trace-event-perl.c. Committer testing: $ rpm -qi libtraceevent-devel Name : libtraceevent-devel Version : 1.5.3 Release : 2.fc36 Architecture: x86_64 Install Date: Mon 25 Jul 2022 03:20:19 PM -03 Group : Unspecified Size : 27728 License : LGPLv2+ and GPLv2+ Signature : RSA/SHA256, Fri 15 Apr 2022 02:11:58 PM -03, Key ID 999f7cbf38ab71f4 Source RPM : libtraceevent-1.5.3-2.fc36.src.rpm Build Date : Fri 15 Apr 2022 10:57:01 AM -03 Build Host : buildvm-x86-05.iad2.fedoraproject.org Packager : Fedora Project Vendor : Fedora Project URL : https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/ Bug URL : https://bugz.fedoraproject.org/libtraceevent Summary : Development headers of libtraceevent Description : Development headers of libtraceevent-libs $ Default build: $ ldd ~/bin/perf | grep tracee libtraceevent.so.1 => /lib64/libtraceevent.so.1 (0x00007f1dcaf8f000) $ # perf trace -e sched:* --max-events 10 0.000 migration/0/17 sched:sched_migrate_task(comm: "", pid: 1603763 (perf), prio: 120, dest_cpu: 1) 0.005 migration/0/17 sched:sched_wake_idle_without_ipi(cpu: 1) 0.011 migration/0/17 sched:sched_switch(prev_comm: "", prev_pid: 17 (migration/0), prev_state: 1, next_comm: "", next_prio: 120) 1.173 :0/0 sched:sched_wakeup(comm: "", pid: 3138 (gnome-terminal-), prio: 120) 1.180 :0/0 sched:sched_switch(prev_comm: "", prev_prio: 120, next_comm: "", next_pid: 3138 (gnome-terminal-), next_prio: 120) 0.156 migration/1/21 sched:sched_migrate_task(comm: "", pid: 1603763 (perf), prio: 120, orig_cpu: 1, dest_cpu: 2) 0.160 migration/1/21 sched:sched_wake_idle_without_ipi(cpu: 2) 0.166 migration/1/21 sched:sched_switch(prev_comm: "", prev_pid: 21 (migration/1), prev_state: 1, next_comm: "", next_prio: 120) 1.183 :0/0 sched:sched_wakeup(comm: "", pid: 1602985 (kworker/u16:0-f), prio: 120, target_cpu: 1) 1.186 :0/0 sched:sched_switch(prev_comm: "", prev_prio: 120, next_comm: "", next_pid: 1602985 (kworker/u16:0-f), next_prio: 120) # Had to tweak tools/perf/util/setup.py to make sure the python binding shared object links with libtraceevent if -DHAVE_LIBTRACEEVENT is present in CFLAGS. Building with NO_LIBTRACEEVENT=1 uncovered some more build failures: - Make building of data-convert-bt.c to CONFIG_LIBTRACEEVENT=y - perf-$(CONFIG_LIBTRACEEVENT) += scripts/ - bpf_kwork.o needs also to be dependent on CONFIG_LIBTRACEEVENT=y - The python binding needed some fixups and util/trace-event.c can't be built and linked with the python binding shared object, so remove it in tools/perf/util/setup.py and exclude it from the list of dependencies in the python/perf.so Makefile.perf target. Building without libtraceevent-devel installed uncovered more build failures: - The python binding tools/perf/util/python.c was assuming that traceevent/parse-events.h was always available, which was the case when we defaulted to using the in-kernel tools/lib/traceevent/ files, now we need to enclose it under ifdef HAVE_LIBTRACEEVENT, just like the other parts of it that deal with tracepoints. - We have to ifdef the rules in the Build files with CONFIG_LIBTRACEEVENT=y to build builtin-trace.c and tools/perf/trace/beauty/ as we only ifdef setting CONFIG_TRACE=y when setting NO_LIBTRACEEVENT=1 in the make command line, not when we don't detect libtraceevent-devel installed in the system. Simplification here to avoid these two ways of disabling builtin-trace.c and not having CONFIG_TRACE=y when libtraceevent-devel isn't installed is the clean way. From Athira: tools/perf/arch/powerpc/util/Build -perf-y += kvm-stat.o +perf-$(CONFIG_LIBTRACEEVENT) += kvm-stat.o Then, ditto for arm64 and s390, detected by container cross build tests. - s/390 uses test__checkevent_tracepoint() that is now only available if HAVE_LIBTRACEEVENT is defined, enclose the callsite with ifder HAVE_LIBTRACEEVENT. Also from Athira: With this change, I could successfully compile in these environment: - Without libtraceevent-devel installed - With libtraceevent-devel installed - With “make NO_LIBTRACEEVENT=1” Then, finally rename CONFIG_TRACEEVENT to CONFIG_LIBTRACEEVENT for consistency with other libraries detected in tools/perf/. Signed-off-by: Ian Rogers Tested-by: Arnaldo Carvalho de Melo Tested-by: Athira Rajeev Cc: Alexander Shishkin Cc: Jiri Olsa Cc: Mark Rutland Cc: Namhyung Kim Cc: Nick Desaulniers Cc: Peter Zijlstra Cc: Stephane Eranian Cc: bpf@vger.kernel.org Link: http://lore.kernel.org/lkml/20221205225940.3079667-3-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo

perf util: Add host_is_bigendian to util.h

2022-12-14T14:16:12+00:00

Avoid libtraceevent dependency for tep_is_bigendian or trace-event.h dependency for bigendian. Add a new host_is_bigendian to util.h, using the compiler defined __BYTE_ORDER__ when available. Committer notes: Added: #else /* !__BYTE_ORDER__ */ On that nested #ifdef block, as per Namhyung's suggestion. Signed-off-by: Ian Rogers Acked-by: Namhyung Kim Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Ingo Molnar Cc: Jiri Olsa Cc: Kan Liang Cc: Leo Yan Cc: Mark Rutland Cc: Masami Hiramatsu Cc: Peter Zijlstra Cc: Stephane Eranian Cc: Steven Rostedt (VMware) Link: https://lore.kernel.org/r/20221130062935.2219247-3-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo

perf script python: Allow reporting the [un]throttle PERF_RECORD_ meta event

2021-09-03T11:18:25+00:00

perf_events may sometimes throttle an event due to creating too many samples during a given timer tick. As of now, the perf tool will not report on throttling, which means this is a silent error. Implement a callback for the throttle and unthrottle events within the Python scripting engine, which can allow scripts to detect and report when events may have been lost due to throttling. The simplest script to report throttle events is: def throttle(*args): print("throttle" + repr(args)) def unthrottle(*args): print("unthrottle" + repr(args)) Signed-off-by: Stephen Brennan Cc: Alexander Shishkin Cc: Jiri Olsa Cc: Mark Rutland Cc: Namhyung Kim Cc: Peter Zijlstra Link: http://lore.kernel.org/lkml/20210901210815.133251-1-stephen.s.brennan@oracle.com Signed-off-by: Arnaldo Carvalho de Melo

perf script: Factor out script_fetch_insn()

2021-06-01T13:03:46+00:00

Factor out script_fetch_insn() so it can be reused. Signed-off-by: Adrian Hunter Cc: Andi Kleen Cc: Jiri Olsa Link: https://lore.kernel.org/r/20210530192308.7382-7-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo

perf scripting: Add perf_session to scripting_context

2021-06-01T13:03:17+00:00

This is preparation for allowing a script to set the itrace options for the session if they have not already been set. Signed-off-by: Adrian Hunter Cc: Andi Kleen Cc: Jiri Olsa Link: https://lore.kernel.org/r/20210530192308.7382-5-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo

perf scripting: Add scripting_context__update()

2021-06-01T13:03:02+00:00

Move scripting_context update to a separate function and add the arguments of ->process_event() to it. This prepares the way for adding more methods to the perf_trace_context module, by providing the context information that they will need. Signed-off-by: Adrian Hunter Cc: Andi Kleen Cc: Jiri Olsa Link: https://lore.kernel.org/r/20210530192308.7382-4-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo

perf scripting python: Add auxtrace error

2021-05-25T13:07:17+00:00

Add auxtrace_error to general python scripting. Signed-off-by: Adrian Hunter Cc: Andi Kleen Cc: Jiri Olsa Link: https://lore.kernel.org/r/20210525095112.1399-10-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo