diff options
| author | Namhyung Kim <namhyung@kernel.org> | 2022-03-22 19:57:08 +0100 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2022-04-05 10:24:35 +0200 |
| commit | 16edd9b511a13e7760ed4b92ba4e39bacda5c86f (patch) | |
| tree | 00f84f1cf80f93a9ff061d3a40cab7cfeaa03d9d /kernel/locking | |
| parent | locking/rwsem: Always try to wake waiters in out_nolock path (diff) | |
| download | linux-16edd9b511a13e7760ed4b92ba4e39bacda5c86f.tar.xz linux-16edd9b511a13e7760ed4b92ba4e39bacda5c86f.zip | |
locking: Add lock contention tracepoints
This adds two new lock contention tracepoints like below:
* lock:contention_begin
* lock:contention_end
The lock:contention_begin takes a flags argument to classify locks. I
found it useful to identify what kind of locks it's tracing like if
it's spinning or sleeping, reader-writer lock, real-time, and per-cpu.
Move tracepoint definitions into mutex.c so that we can use them
without lockdep.
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Link: https://lkml.kernel.org/r/20220322185709.141236-2-namhyung@kernel.org
Diffstat (limited to 'kernel/locking')
| -rw-r--r-- | kernel/locking/lockdep.c | 1 | ||||
| -rw-r--r-- | kernel/locking/mutex.c | 3 |
2 files changed, 3 insertions, 1 deletions
diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c index 3cbd49216174..a6e671b8608d 100644 --- a/kernel/locking/lockdep.c +++ b/kernel/locking/lockdep.c @@ -60,7 +60,6 @@ #include "lockdep_internals.h" -#define CREATE_TRACE_POINTS #include <trace/events/lock.h> #ifdef CONFIG_PROVE_LOCKING diff --git a/kernel/locking/mutex.c b/kernel/locking/mutex.c index 5e3585950ec8..ee2fd7614a93 100644 --- a/kernel/locking/mutex.c +++ b/kernel/locking/mutex.c @@ -30,6 +30,9 @@ #include <linux/debug_locks.h> #include <linux/osq_lock.h> +#define CREATE_TRACE_POINTS +#include <trace/events/lock.h> + #ifndef CONFIG_PREEMPT_RT #include "mutex.h" |