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author | Steven Rostedt <srostedt@redhat.com> | 2008-05-12 19:20:42 (GMT) |
---|---|---|
committer | Thomas Gleixner <tglx@linutronix.de> | 2008-05-23 18:32:27 (GMT) |
commit | 35e8e302e5d6e32675df2fc1dd3a53dfa6630dc1 (patch) | |
tree | 5b5b503666d882bbb4d805b7b20b4f3b11d2c40e /kernel/trace/Makefile | |
parent | 1b29b01887e6032dcaf818c14999c7a39593b4e7 (diff) | |
download | linux-fsl-qoriq-35e8e302e5d6e32675df2fc1dd3a53dfa6630dc1.tar.xz |
ftrace: add tracing of context switches
This patch adds context switch tracing, of the format of:
_------=> CPU#
/ _-----=> irqs-off
| / _----=> need-resched
|| / _---=> hardirq/softirq
||| / _--=> preempt-depth
|||| /
||||| delay
cmd pid ||||| time | pid:prio:state
\ / ||||| \ | /
swapper-0 1d..3 137us+: 0:140:R --> 2912:120
sshd-2912 1d..3 216us+: 2912:120:S --> 0:140
swapper-0 1d..3 261us+: 0:140:R --> 2912:120
bash-2920 0d..3 267us+: 2920:120:S --> 0:140
sshd-2912 1d..3 330us!: 2912:120:S --> 0:140
swapper-0 1d..3 2389us+: 0:140:R --> 2847:120
yum-upda-2847 1d..3 2411us!: 2847:120:S --> 0:140
swapper-0 0d..3 11089us+: 0:140:R --> 3139:120
gdm-bina-3139 0d..3 11113us!: 3139:120:S --> 0:140
swapper-0 1d..3 102328us+: 0:140:R --> 2847:120
yum-upda-2847 1d..3 102348us!: 2847:120:S --> 0:140
"sched_switch" is added to /debugfs/tracing/available_tracers
[ Eugene Teo <eugeneteo@kernel.sg: remove unused tracing_sched_switch_enabled ]
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/trace/Makefile')
-rw-r--r-- | kernel/trace/Makefile | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/trace/Makefile b/kernel/trace/Makefile index 6bb5e50..6b54ceb 100644 --- a/kernel/trace/Makefile +++ b/kernel/trace/Makefile @@ -1,6 +1,7 @@ obj-$(CONFIG_FTRACE) += libftrace.o obj-$(CONFIG_TRACING) += trace.o +obj-$(CONFIG_CONTEXT_SWITCH_TRACER) += trace_sched_switch.o obj-$(CONFIG_FTRACE) += trace_functions.o libftrace-y := ftrace.o |