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| author |   Tomas Glozar <tglozar@redhat.com> | 2024-10-17 16:09:14 +0200 |
|---|---|---|
| committer |   Steven Rostedt (Google) <rostedt@goodmis.org> | 2024-10-17 17:13:16 -0400 |
| commit | 13216486e3ede30d6910a22e0e15988b7016366b (patch) | |
| tree | 38828e93075e0b2fb24ee0bd2c34965cc9d48334 | |
| parent | rtla/timerlat: Add --deepest-idle-state for hist (diff) | |
| download | wireguard-linux-13216486e3ede30d6910a22e0e15988b7016366b.tar.xz wireguard-linux-13216486e3ede30d6910a22e0e15988b7016366b.zip | |
rtla: Documentation: Mention --deepest-idle-state
Add --deepest-idle-state to manpage and mention libcpupower dependency
in README.txt.
Link: https://lore.kernel.org/20241017140914.3200454-7-tglozar@redhat.com
Signed-off-by: Tomas Glozar <tglozar@redhat.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Diffstat (limited to '')
| -rw-r--r-- | Documentation/tools/rtla/common_timerlat_options.rst | 8 | ||||
| -rw-r--r-- | tools/tracing/rtla/README.txt | 4 |
2 files changed, 12 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**. diff --git a/tools/tracing/rtla/README.txt b/tools/tracing/rtla/README.txt index 4af3fd40f171..dd5621038c55 100644 --- a/tools/tracing/rtla/README.txt +++ b/tools/tracing/rtla/README.txt @@ -11,6 +11,7 @@ RTLA depends on the following libraries and tools: - libtracefs - libtraceevent + - libcpupower (optional, for --deepest-idle-state) It also depends on python3-docutils to compile man pages. @@ -26,6 +27,9 @@ For development, we suggest the following steps for compiling rtla: $ make $ sudo make install $ cd .. + $ cd $libcpupower_src + $ make + $ sudo make install $ cd $rtla_src $ make $ sudo make install |