Messages in this thread | | | From | Joel Fernandes <> | Subject | [PATCH v5 0/2] tracing: Add trace events for preemption and irq disable/enable | Date | Tue, 12 Sep 2017 11:11:07 -0700 |
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These patches add trace events support for preempt and irq disable/enable events. This version has few changes suggested by Steven as well.
I am looking forward to getting these accepted for v4.15 if possible. I based it on Linus's master, please let me know if there is another branch I need to rebase on. thanks!
Changes since v4: - Use static inline instead of defines for tracer functions. - Moved new per-cpu variables to protect from recursion to the correct defines. - Dropped bug fix patch (3/3) not related to series and will submit that separately.
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
Links to earlier series: v4: https://lkml.org/lkml/2017/9/6/724 v3: https://lkml.org/lkml/2017/9/3/15
Joel Fernandes (2): tracing: Prepare to add preempt and irq trace events tracing: Add support for preempt and irq enable/disable events
include/linux/ftrace.h | 3 +- include/linux/irqflags.h | 4 +- include/trace/events/preemptirq.h | 62 ++++++++++++++ kernel/trace/Kconfig | 9 ++ kernel/trace/Makefile | 1 + kernel/trace/trace_irqsoff.c | 176 +++++++++++++++++++++++++++++++------- 6 files changed, 222 insertions(+), 33 deletions(-) create mode 100644 include/trace/events/preemptirq.h
Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: kernel-team@android.com -- 2.14.1.581.gf28d330327-goog
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