diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-06-10 10:15:47 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-06-10 10:15:47 -0700 |
| commit | f701d860af381265639244fb84b07797fbb5efca (patch) | |
| tree | a434e40ab7ee6c41cb2248d9c0fc7f54653a8c68 /tools/perf/Documentation/perf-script-python.txt | |
| parent | 9376906c17fa975bf6a7ea9dd124be697bcda289 (diff) | |
| parent | 47c1ded7fef108c730b803cd386241beffcdd15c (diff) | |
Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Ingo Molnar:
"This is mostly tooling fixes, plus an instruction pointer filtering
fix.
It's more fixes than usual - Arnaldo got back from a longer vacation
and there was a backlog"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (27 commits)
perf symbols: Kill dso__build_id_is_kmod()
perf symbols: Keep DSO->symtab_type after decompress
perf tests: Decompress kernel module before objdump
perf tools: Consolidate error path in __open_dso()
perf tools: Decompress kernel module when reading DSO data
perf annotate: Use dso__decompress_kmodule_path()
perf tools: Introduce dso__decompress_kmodule_{fd,path}
perf tools: Fix a memory leak in __open_dso()
perf annotate: Fix symbolic link of build-id cache
perf/core: Drop kernel samples even though :u is specified
perf script python: Remove dups in documentation examples
perf script python: Updated trace_unhandled() signature
perf script python: Fix wrong code snippets in documentation
perf script: Fix documentation errors
perf script: Fix outdated comment for perf-trace-python
perf probe: Fix examples section of documentation
perf report: Ensure the perf DSO mapping matches what libdw sees
perf report: Include partial stacks unwound with libdw
perf annotate: Add missing powerpc triplet
perf test: Disable breakpoint signal tests for powerpc
...
Diffstat (limited to 'tools/perf/Documentation/perf-script-python.txt')
| -rw-r--r-- | tools/perf/Documentation/perf-script-python.txt | 23 |
1 files changed, 9 insertions, 14 deletions
diff --git a/tools/perf/Documentation/perf-script-python.txt b/tools/perf/Documentation/perf-script-python.txt index 54acba221558..51ec2d20068a 100644 --- a/tools/perf/Documentation/perf-script-python.txt +++ b/tools/perf/Documentation/perf-script-python.txt @@ -149,10 +149,8 @@ def raw_syscalls__sys_enter(event_name, context, common_cpu, print "id=%d, args=%s\n" % \ (id, args), -def trace_unhandled(event_name, context, common_cpu, common_secs, common_nsecs, - common_pid, common_comm): - print_header(event_name, common_cpu, common_secs, common_nsecs, - common_pid, common_comm) +def trace_unhandled(event_name, context, event_fields_dict): + print ' '.join(['%s=%s'%(k,str(v))for k,v in sorted(event_fields_dict.items())]) def print_header(event_name, cpu, secs, nsecs, pid, comm): print "%-20s %5u %05u.%09u %8u %-20s " % \ @@ -321,7 +319,7 @@ So those are the essential steps in writing and running a script. The process can be generalized to any tracepoint or set of tracepoints you're interested in - basically find the tracepoint(s) you're interested in by looking at the list of available events shown by -'perf list' and/or look in /sys/kernel/debug/tracing events for +'perf list' and/or look in /sys/kernel/debug/tracing/events/ for detailed event and field info, record the corresponding trace data using 'perf record', passing it the list of interesting events, generate a skeleton script using 'perf script -g python' and modify the @@ -334,7 +332,7 @@ right place, you can have your script listed alongside the other scripts listed by the 'perf script -l' command e.g.: ---- -root@tropicana:~# perf script -l +# perf script -l List of available trace scripts: wakeup-latency system-wide min/max/avg wakeup latency rw-by-file <comm> r/w activity for a program, by file @@ -383,8 +381,6 @@ source tree: ---- # ls -al kernel-source/tools/perf/scripts/python - -root@tropicana:/home/trz/src/tip# ls -al tools/perf/scripts/python total 32 drwxr-xr-x 4 trz trz 4096 2010-01-26 22:30 . drwxr-xr-x 4 trz trz 4096 2010-01-26 22:29 .. @@ -399,7 +395,7 @@ otherwise your script won't show up at run-time), 'perf script -l' should show a new entry for your script: ---- -root@tropicana:~# perf script -l +# perf script -l List of available trace scripts: wakeup-latency system-wide min/max/avg wakeup latency rw-by-file <comm> r/w activity for a program, by file @@ -437,7 +433,7 @@ EVENT HANDLERS When perf script is invoked using a trace script, a user-defined 'handler function' is called for each event in the trace. If there's no handler function defined for a given event type, the event is -ignored (or passed to a 'trace_handled' function, see below) and the +ignored (or passed to a 'trace_unhandled' function, see below) and the next event is processed. Most of the event's field values are passed as arguments to the @@ -532,7 +528,7 @@ can implement a set of optional functions: gives scripts a chance to do setup tasks: ---- -def trace_begin: +def trace_begin(): pass ---- @@ -541,7 +537,7 @@ def trace_begin: as display results: ---- -def trace_end: +def trace_end(): pass ---- @@ -550,8 +546,7 @@ def trace_end: of common arguments are passed into it: ---- -def trace_unhandled(event_name, context, common_cpu, common_secs, - common_nsecs, common_pid, common_comm): +def trace_unhandled(event_name, context, event_fields_dict): pass ---- |
