From dc1f7893a70fe403983bd8492f177bf993940e2c Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Wed, 30 Mar 2022 13:06:54 +0200 Subject: 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) --- include/trace/events/lock.h | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'include') 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" } )) ); -- cgit v1.2.3