summaryrefslogtreecommitdiff
path: root/lib/Kconfig.debug
diff options
context:
space:
mode:
authorHitoshi Mitake <mitake@dcl.info.waseda.ac.jp>2010-02-04 16:08:15 +0900
committerFrederic Weisbecker <fweisbec@gmail.com>2010-02-27 17:05:22 +0100
commit84c6f88fc8265d7a712d7d6ed8fc1a878dfc84d1 (patch)
tree4f5b0cf3357b2afbc41fa257e524d62b04cd392e /lib/Kconfig.debug
parent44ee63587dce85593c22497140db16f4e5027860 (diff)
perf lock: Fix and add misc documentally things
I've forgot to add 'perf lock' line to command-list.txt, so users of perf could not find perf lock when they type 'perf'. Fixing command-list.txt requires document (tools/perf/Documentation/perf-lock.txt). But perf lock is too much "under construction" to write a stable document, so this is something like pseudo document for now. And I wrote description of perf lock at help section of CONFIG_LOCK_STAT, this will navigate users of lock trace events. Signed-off-by: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> LKML-Reference: <1265267295-8388-1-git-send-email-mitake@dcl.info.waseda.ac.jp> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Diffstat (limited to 'lib/Kconfig.debug')
-rw-r--r--lib/Kconfig.debug6
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 25c3ed594c54..65f964e7fe78 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -520,6 +520,12 @@ config LOCK_STAT
For more details, see Documentation/lockstat.txt
+ You can analyze lock events with "perf lock", subcommand of perf.
+ If you want to use "perf lock", you need to turn on CONFIG_EVENT_TRACING.
+
+ CONFIG_LOCK_STAT defines "contended" and "acquired" lock events.
+ (CONFIG_LOCKDEP defines "acquire" and "release" events.)
+
config DEBUG_LOCKDEP
bool "Lock dependency engine debugging"
depends on DEBUG_KERNEL && LOCKDEP