Signed-off-by: Daniel Wagner <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Jonathan Corbet <[email protected]> ---
I spent some time to figure out what I saw in /proc/lock_stat. Maybe someone else has the same question. --- Documentation/locking/lockstat.txt | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/Documentation/locking/lockstat.txt b/Documentation/locking/lockstat.txt index 7428773..568bbba 100644 --- a/Documentation/locking/lockstat.txt +++ b/Documentation/locking/lockstat.txt @@ -121,6 +121,11 @@ show the header with column descriptions. Lines 05-18 and 20-31 show the actual statistics. These statistics come in two parts; the actual stats separated by a short separator (line 08, 13) from the contention points. +Lines 09-12 show the first 4 recorded contention points (the code +which tries to get the lock) and lines 14-17 show the first 4 recorded +contended points (the lock holder). It is possible that the max +con-bounces point is missing in the statistics. + The first lock (05-18) is a read/write lock, and shows two lines above the short separator. The contention points don't match the column descriptors, they have two: contentions and [<IP>] symbol. The second set of contention -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
