]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
trace/timerlat: Add a header with PREEMPT_RT additional fields
authorDaniel Bristot de Oliveira <bristot@kernel.org>
Sun, 18 Jul 2021 09:07:54 +0000 (11:07 +0200)
committerSteven Rostedt (VMware) <rostedt@goodmis.org>
Thu, 12 Aug 2021 17:35:56 +0000 (13:35 -0400)
commite1c4ad4a7f58417a6c483432b69c640670b6fe3d
tree31d1466ca1f8b77b7c8dd94fa44c684cca7ef5b7
parentd03721a6e7e8c04261873b3840daa3ce2c5b0543
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>
kernel/trace/trace_osnoise.c