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| author | Daniel Bristot de Oliveira <bristot@kernel.org> | 2023-06-06 18:12:25 +0200 |
|---|---|---|
| committer | Steven Rostedt (Google) <rostedt@goodmis.org> | 2023-06-13 22:43:37 +0200 |
| commit | 6127383217741615f3450b684ecbee1ff570ee98 (patch) | |
| tree | d42095e197b1fde9f614a5873c2a6373e0ab1813 /Documentation/tools | |
| parent | rtla/timerlat_hist: Add timerlat user-space support (diff) | |
| download | linux-6127383217741615f3450b684ecbee1ff570ee98.tar.xz linux-6127383217741615f3450b684ecbee1ff570ee98.zip | |
Documentation: Add tools/rtla timerlat -u option documentation
Add the -u/--user-thread option documentation for timerlat top/hist.
Link: https://lkml.kernel.org/r/bf727c8ccb8f50792200ae620141e047edf4af7a.1686066600.git.bristot@kernel.org
Cc: William White <chwhite@redhat.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Tested-by: Juri Lelli <juri.lelli@redhat.com>
Signed-off-by: Daniel Bristot de Oliveira <bristot@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Diffstat (limited to 'Documentation/tools')
| -rw-r--r-- | Documentation/tools/rtla/common_timerlat_options.rst | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/tools/rtla/common_timerlat_options.rst b/Documentation/tools/rtla/common_timerlat_options.rst index bacdea6de7a3..88506b397c2d 100644 --- a/Documentation/tools/rtla/common_timerlat_options.rst +++ b/Documentation/tools/rtla/common_timerlat_options.rst @@ -26,3 +26,10 @@ Set the /dev/cpu_dma_latency to *us*, aiming to bound exit from idle latencies. *cyclictest* sets this value to *0* by default, use **--dma-latency** *0* to have similar results. + +**-u**, **--user-threads** + + Set timerlat to run without a workload, and then dispatches user-space workloads + to wait on the timerlat_fd. Once the workload is awakes, it goes to sleep again + adding so the measurement for the kernel-to-user and user-to-kernel to the tracer + output. |