* using perf lock
@ 2012-05-23 15:42 Hank
2012-05-24 0:28 ` Namhyung Kim
0 siblings, 1 reply; 2+ messages in thread
From: Hank @ 2012-05-23 15:42 UTC (permalink / raw)
To: linux-perf-users
Hi,
I've been trying to use perf lock command on my Ubuntu 12.04, but I'm getting
this error:
invalid or unsupported event: 'lock:lock_acquire'
What might be the problem? Should I get the kernel source code?
Thanks,
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: using perf lock
2012-05-23 15:42 using perf lock Hank
@ 2012-05-24 0:28 ` Namhyung Kim
0 siblings, 0 replies; 2+ messages in thread
From: Namhyung Kim @ 2012-05-24 0:28 UTC (permalink / raw)
To: Hank; +Cc: linux-perf-users
Hi,
On Wed, 23 May 2012 15:42:42 +0000 (UTC), Hank wrote:
> I've been trying to use perf lock command on my Ubuntu 12.04, but I'm getting
> this error:
>
> invalid or unsupported event: 'lock:lock_acquire'
>
> What might be the problem? Should I get the kernel source code?
>
Maybe due to the kernel was built without CONFIG_LOCKDEP and/or
CONFIG_LOCK_STAT. You can grep it from /boot/config-$(uname -r).
If so, you need to rebuild the kernel.
Thanks,
Namhyung
^ permalink raw reply [flat|nested] 2+ messages in thread
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2012-05-24 0:28 ` Namhyung Kim
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