summaryrefslogtreecommitdiffstats
path: root/Documentation/tools/rtla/common_timerlat_options.rst
diff options
context:
space:
mode:
Diffstat (limited to 'Documentation/tools/rtla/common_timerlat_options.rst')
-rw-r--r--Documentation/tools/rtla/common_timerlat_options.rst6
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/tools/rtla/common_timerlat_options.rst b/Documentation/tools/rtla/common_timerlat_options.rst
index 88506b397c2d..d3255ed70195 100644
--- a/Documentation/tools/rtla/common_timerlat_options.rst
+++ b/Documentation/tools/rtla/common_timerlat_options.rst
@@ -33,3 +33,9 @@
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.
+
+**-U**, **--user-load**
+
+ Set timerlat to run without workload, waiting for the user to dispatch a per-cpu
+ task that waits for a new period on the tracing/osnoise/per_cpu/cpu$ID/timerlat_fd.
+ See linux/tools/rtla/sample/timerlat_load.py for an example of user-load code.