29380d4055
Man page for rtla timerlat tool. Link: https://lkml.kernel.org/r/78678b8d024bf5a3a79f831ac9441b96e8d2f56e.1639158831.git.bristot@kernel.org Cc: Tao Zhou <tao.zhou@linux.dev> Cc: Ingo Molnar <mingo@redhat.com> Cc: Tom Zanussi <zanussi@kernel.org> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Juri Lelli <juri.lelli@redhat.com> Cc: Clark Williams <williams@redhat.com> Cc: John Kacur <jkacur@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: Daniel Bristot de Oliveira <bristot@kernel.org> Cc: linux-rt-users@vger.kernel.org Cc: linux-trace-devel@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Daniel Bristot de Oliveira <bristot@kernel.org> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
11 lines
561 B
ReStructuredText
11 lines
561 B
ReStructuredText
The **rtla timerlat** tool is an interface for the *timerlat* tracer. The
|
|
*timerlat* tracer dispatches a kernel thread per-cpu. These threads
|
|
set a periodic timer to wake themselves up and go back to sleep. After
|
|
the wakeup, they collect and generate useful information for the
|
|
debugging of operating system timer latency.
|
|
|
|
The *timerlat* tracer outputs information in two ways. It periodically
|
|
prints the timer latency at the timer *IRQ* handler and the *Thread*
|
|
handler. It also enable the trace of the most relevant information via
|
|
**osnoise:** tracepoints.
|