Home Explore Help
Sign In
GfA
/
linux_kernel
5
0
Fork 0
Files Issues 0 Pull Requests 0 Wiki
Browse Source

lockstat: Add documentation on contention and contenting points

Signed-off-by: Daniel Wagner <daniel.wagner@bmw-carit.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Daniel Wagner 10 years ago
parent
e72a652921
commit
7b7e1b7b7f
1 changed files with 5 additions and 0 deletions
Unified View Show Diff Stats
  1. 5 0
      Documentation/locking/lockstat.txt

+ 5 - 0
Documentation/locking/lockstat.txt
View File 

@@ -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
 
 statistics. These statistics come in two parts; the actual stats separated by a
 
 short separator (line 08, 13) from the contention points.
 
 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
 
 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,
 
 short separator. The contention points don't match the column descriptors,
 
 they have two: contentions and [<IP>] symbol. The second set of contention
 
 they have two: contentions and [<IP>] symbol. The second set of contention