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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2024-11-22 13:24:22 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2024-11-22 13:24:22 -0800 |
| commit | 4b01712311c6e209137c4fa3e7d7920ec509456a (patch) | |
| tree | 1a5cee40c05c6e9c917d9a9a5459ed728a3b376d /Documentation | |
| parent | f1db825805d48cee6826b7dc082a04112c1f0c8d (diff) | |
| parent | 571f8b3f866a6d990a50fe5c89fe0ea78784d70b (diff) | |
| download | linux-4b01712311c6e209137c4fa3e7d7920ec509456a.tar.gz linux-4b01712311c6e209137c4fa3e7d7920ec509456a.tar.bz2 linux-4b01712311c6e209137c4fa3e7d7920ec509456a.zip | |
Merge tag 'trace-tools-v6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
Pull tracing tools updates from Steven Rostedt:
- Add ':' to getopt option 'trace-buffer-size' in timerlat_hist for
consistency
- Remove unused sched_getattr define
- Rename sched_setattr() helper to syscall_sched_setattr() to avoid
conflicts
- Update counters to long from int to avoid overflow
- Add libcpupower dependency detection
- Add --deepest-idle-state to timerlat to limit deep idle sleeps
- Other minor clean ups and documentation changes
* tag 'trace-tools-v6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
verification/dot2: Improve dot parser robustness
tools/rtla: Improve exception handling in timerlat_load.py
tools/rtla: Enhance argument parsing in timerlat_load.py
tools/rtla: Improve code readability in timerlat_load.py
rtla/timerlat: Do not set params->user_workload with -U
rtla: Documentation: Mention --deepest-idle-state
rtla/timerlat: Add --deepest-idle-state for hist
rtla/timerlat: Add --deepest-idle-state for top
rtla/utils: Add idle state disabling via libcpupower
rtla: Add optional dependency on libcpupower
tools/build: Add libcpupower dependency detection
rtla/timerlat: Make timerlat_hist_cpu->*_count unsigned long long
rtla/timerlat: Make timerlat_top_cpu->*_count unsigned long long
tools/rtla: fix collision with glibc sched_attr/sched_set_attr
tools/rtla: drop __NR_sched_getattr
rtla: Fix consistency in getopt_long for timerlat_hist
rv: Fix a typo
tools/rv: Correct the grammatical errors in the comments
tools/rv: Correct the grammatical errors in the comments
rtla: use the definition for stdout fd when calling isatty()
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/tools/rtla/common_timerlat_options.rst | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/Documentation/tools/rtla/common_timerlat_options.rst b/Documentation/tools/rtla/common_timerlat_options.rst index cef6651f1435..10dc802f8d65 100644 --- a/Documentation/tools/rtla/common_timerlat_options.rst +++ b/Documentation/tools/rtla/common_timerlat_options.rst @@ -31,6 +31,14 @@ *cyclictest* sets this value to *0* by default, use **--dma-latency** *0* to have similar results. +**--deepest-idle-state** *n* + Disable idle states higher than *n* for cpus that are running timerlat threads to + reduce exit from idle latencies. If *n* is -1, all idle states are disabled. + On exit from timerlat, the idle state setting is restored to its original state + before running timerlat. + + Requires rtla to be built with libcpupower. + **-k**, **--kernel-threads** Use timerlat kernel-space threads, in contrast of **-u**. |