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| author | Peter Zijlstra <peterz@infradead.org> | 2022-03-30 13:06:54 +0200 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2022-04-05 10:24:36 +0200 |
| commit | dc1f7893a70fe403983bd8492f177bf993940e2c (patch) | |
| tree | 0601a9c8f14c338fbae6755284036b50e98501d1 /include/trace | |
| parent | ee042be16cb455116d0fe99b77c6bc8baf87c8c6 (diff) | |
| download | linux-dc1f7893a70fe403983bd8492f177bf993940e2c.tar.gz linux-dc1f7893a70fe403983bd8492f177bf993940e2c.tar.bz2 linux-dc1f7893a70fe403983bd8492f177bf993940e2c.zip | |
locking/mutex: Make contention tracepoints more consistent wrt adaptive spinning
Have the trace_contention_*() tracepoints consistently include
adaptive spinning. In order to differentiate between the spinning and
non-spinning states add LCB_F_MUTEX and combine with LCB_F_SPIN.
The consequence is that a mutex contention can now triggler multiple
_begin() tracepoints before triggering an _end().
Additionally, this fixes one path where mutex would trigger _end()
without ever seeing a _begin().
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Diffstat (limited to 'include/trace')
| -rw-r--r-- | include/trace/events/lock.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/include/trace/events/lock.h b/include/trace/events/lock.h index b9b6e3edd518..9ebd081e057e 100644 --- a/include/trace/events/lock.h +++ b/include/trace/events/lock.h @@ -14,6 +14,7 @@ #define LCB_F_WRITE (1U << 2) #define LCB_F_RT (1U << 3) #define LCB_F_PERCPU (1U << 4) +#define LCB_F_MUTEX (1U << 5) #ifdef CONFIG_LOCKDEP @@ -113,7 +114,8 @@ TRACE_EVENT(contention_begin, { LCB_F_READ, "READ" }, { LCB_F_WRITE, "WRITE" }, { LCB_F_RT, "RT" }, - { LCB_F_PERCPU, "PERCPU" } + { LCB_F_PERCPU, "PERCPU" }, + { LCB_F_MUTEX, "MUTEX" } )) ); |