diff options
| author | Daniel Bristot de Oliveira <bristot@kernel.org> | 2021-07-18 11:07:54 +0200 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2021-08-12 13:35:56 -0400 |
| commit | e1c4ad4a7f58417a6c483432b69c640670b6fe3d (patch) | |
| tree | 31d1466ca1f8b77b7c8dd94fa44c684cca7ef5b7 /kernel/trace/Kconfig | |
| parent | d03721a6e7e8c04261873b3840daa3ce2c5b0543 (diff) | |
trace/timerlat: Add a header with PREEMPT_RT additional fields
Some extra flags are printed to the trace header when using the
PREEMPT_RT config. The extra flags are: need-resched-lazy,
preempt-lazy-depth, and migrate-disable.
Without printing these fields, the timerlat specific fields are
shifted by three positions, for example:
# tracer: timerlat
#
# _-----=> irqs-off
# / _----=> need-resched
# | / _---=> hardirq/softirq
# || / _--=> preempt-depth
# || /
# |||| ACTIVATION
# TASK-PID CPU# |||| TIMESTAMP ID CONTEXT LATENCY
# | | | |||| | | | |
<idle>-0 [000] d..h... 3279.798871: #1 context irq timer_latency 830 ns
<...>-807 [000] ....... 3279.798881: #1 context thread timer_latency 11301 ns
Add a new header for timerlat with the missing fields, to be used
when the PREEMPT_RT is enabled.
Link: https://lkml.kernel.org/r/babb83529a3211bd0805be0b8c21608230202c55.1626598844.git.bristot@kernel.org
Cc: Tom Zanussi <zanussi@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Daniel Bristot de Oliveira <bristot@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/Kconfig')
0 files changed, 0 insertions, 0 deletions