Messages in this thread | | | From | Joel Fernandes <> | Subject | [PATCH 0/2] tracing: Add critical section event support | Date | Sun, 3 Sep 2017 01:50:49 -0700 |
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These patches add critical section event tracing support.
Changes since RFC [1] are: - Make critical events independent of the preempt/irqsoff tracer. - Store pointers instead of symbol names to do less in the fast path. - Other changes based on Steven's comments.
Here's an example of how Android's systrace will be using it to show critical sections as a gantt chart: http://imgur.com/download/TZplEVp
[1] https://patchwork.kernel.org/patch/9676579/
Joel Fernandes (2): tracing: irqsoff: Move code under tracer config options tracing: Add support for critical section events
include/linux/ftrace.h | 2 +- include/linux/irqflags.h | 3 +- include/trace/events/critical.h | 45 ++++++ kernel/trace/Kconfig | 5 + kernel/trace/Makefile | 1 + kernel/trace/trace_irqsoff.c | 331 ++++++++++++++++++++++++++-------------- 6 files changed, 269 insertions(+), 118 deletions(-) create mode 100644 include/trace/events/critical.h
Cc: Steven Rostedt <rostedt@goodmis.org> Cc: kernel-team@android.com -- 2.14.1.581.gf28d330327-goog
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