diff options
Diffstat (limited to 'tools/perf/Documentation/perf-trace-python.txt')
| -rw-r--r-- | tools/perf/Documentation/perf-trace-python.txt | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/tools/perf/Documentation/perf-trace-python.txt b/tools/perf/Documentation/perf-trace-python.txt index a241aca7718..16a86500dcf 100644 --- a/tools/perf/Documentation/perf-trace-python.txt +++ b/tools/perf/Documentation/perf-trace-python.txt | |||
| @@ -93,7 +93,7 @@ don't care how it exited, so we'll use 'perf record' to record only | |||
| 93 | the sys_enter events: | 93 | the sys_enter events: |
| 94 | 94 | ||
| 95 | ---- | 95 | ---- |
| 96 | # perf record -c 1 -f -a -M -R -e raw_syscalls:sys_enter | 96 | # perf record -a -e raw_syscalls:sys_enter |
| 97 | 97 | ||
| 98 | ^C[ perf record: Woken up 1 times to write data ] | 98 | ^C[ perf record: Woken up 1 times to write data ] |
| 99 | [ perf record: Captured and wrote 56.545 MB perf.data (~2470503 samples) ] | 99 | [ perf record: Captured and wrote 56.545 MB perf.data (~2470503 samples) ] |
| @@ -359,7 +359,7 @@ your script: | |||
| 359 | # cat kernel-source/tools/perf/scripts/python/bin/syscall-counts-record | 359 | # cat kernel-source/tools/perf/scripts/python/bin/syscall-counts-record |
| 360 | 360 | ||
| 361 | #!/bin/bash | 361 | #!/bin/bash |
| 362 | perf record -c 1 -f -a -M -R -e raw_syscalls:sys_enter | 362 | perf record -a -e raw_syscalls:sys_enter |
| 363 | ---- | 363 | ---- |
| 364 | 364 | ||
| 365 | The 'report' script is also a shell script with the same base name as | 365 | The 'report' script is also a shell script with the same base name as |
| @@ -449,12 +449,10 @@ available as calls back into the perf executable (see below). | |||
| 449 | As an example, the following perf record command can be used to record | 449 | As an example, the following perf record command can be used to record |
| 450 | all sched_wakeup events in the system: | 450 | all sched_wakeup events in the system: |
| 451 | 451 | ||
| 452 | # perf record -c 1 -f -a -M -R -e sched:sched_wakeup | 452 | # perf record -a -e sched:sched_wakeup |
| 453 | 453 | ||
| 454 | Traces meant to be processed using a script should be recorded with | 454 | Traces meant to be processed using a script should be recorded with |
| 455 | the above options: -c 1 says to sample every event, -a to enable | 455 | the above option: -a to enable system-wide collection. |
| 456 | system-wide collection, -M to multiplex the output, and -R to collect | ||
| 457 | raw samples. | ||
| 458 | 456 | ||
| 459 | The format file for the sched_wakep event defines the following fields | 457 | The format file for the sched_wakep event defines the following fields |
| 460 | (see /sys/kernel/debug/tracing/events/sched/sched_wakeup/format): | 458 | (see /sys/kernel/debug/tracing/events/sched/sched_wakeup/format): |
