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| author | Steven Rostedt <[email protected]> | 2009-09-11 13:55:35 -0400 |
|---|---|---|
| committer | Steven Rostedt <[email protected]> | 2009-09-11 13:55:35 -0400 |
| commit | 637e7e864103a7a68c1ce43ada27dfc25c0d113f (patch) | |
| tree | 7ef0eadf41d79b07bc19f62b1355f7c824d781fd /tools/perf/scripts/python/check-perf-trace.py | |
| parent | 48659d31195bb76d688e99dabd816c5472fb1656 (diff) | |
tracing: add lock depth to entries
This patch adds the lock depth of the big kernel lock to the generic
entry header. This way we can see the depth of the lock and help
in removing the BKL.
Example:
# _------=> CPU#
# / _-----=> irqs-off
# | / _----=> need-resched
# || / _---=> hardirq/softirq
# ||| / _--=> preempt-depth
# |||| /_--=> lock-depth
# |||||/ delay
# cmd pid |||||| time | caller
# \ / |||||| \ | /
<idle>-0 2.N..3 5902255250us+: lock_acquire: read rcu_read_lock
<idle>-0 2.N..3 5902255253us+: lock_release: rcu_read_lock
<idle>-0 2dN..3 5902255257us+: lock_acquire: xtime_lock
<idle>-0 2dN..4 5902255259us : lock_acquire: clocksource_lock
<idle>-0 2dN..4 5902255261us+: lock_release: clocksource_lock
Signed-off-by: Steven Rostedt <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/check-perf-trace.py')
0 files changed, 0 insertions, 0 deletions