Messages in this thread Patch in this message | | | Date | Wed, 10 Jun 2009 01:42:09 -0400 | From | Steven Rostedt <> | Subject | [PATCH 03/11] tracing: convert lockdep lock_acquired trace point to use nsec2usec tag |
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From: Steven Rostedt <srostedt@redhat.com>
The current conversion of the nsec value in the lockstat lock event is performed in the fast path. Now that there is a tag to do the conversion we can move this into the slow path and increase performance while tracing.
This patch also fixes a typo in the tag name.
[ Impact: increase performance in lockstat tracing and tag typo fix ]
Signed-off-by: Steven Rostedt <rostedt@goodmis.org> --- include/trace/events/lockdep.h | 8 +++----- 1 files changed, 3 insertions(+), 5 deletions(-)
diff --git a/include/trace/events/lockdep.h b/include/trace/events/lockdep.h index f9d74c8..4251f17 100644 --- a/include/trace/events/lockdep.h +++ b/include/trace/events/lockdep.h @@ -74,15 +74,13 @@ TRACE_EVENT(lock_acquired, TP_STRUCT__entry( __string(name, lock->name) - __field(unsigned long, wait_usec) - __field(unsigned long, wait_nsec_rem) + __field(long long, wait_nsec) ), TP_fast_assign( __assign_str(name, lock->name); - __entry->wait_nsec_rem = do_div(waittime, NSEC_PER_USEC); - __entry->wait_usec = (unsigned long) waittime; + __entry->wait_nsec = waittime; ), - TP_FORMAT("<sting:name> (<uint:wait_usec>.<printf:wait_nsec_rem:03lu> us)") + TP_FORMAT("<string:name> (<nsec2usec:3:wait_nsec> us)") ); #endif -- 1.6.3.1 --
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