Messages in this thread |  | | | Subject | Re: [Announce] Development release 0.1 of the LatencyTOP tool | | From | Andi Kleen <> | | Date | Sat, 19 Jan 2008 06:07:28 +0100 | |
Arjan van de Ven <arjan@linux.intel.com> writes:
> The Intel Open Source Technology Center is pleased to announce the
> release of version 0.1 of LatencyTOP, a tool for developers to visualize
> system latencies.
Just for completeness -- Linux already had a way to profile latencies
since quite some time. It's little known unfortunately and doesn't
work for modules since it's a special mode in the old non modular kernel
profiler.
You enable CONFIG_SCHEDSTATS and boot with profile=sleep and then you can
use the readprofile command to read the data. Information can be reset with
echo > /proc/profile
There's also a profile=sched to profile the scheduler which works even
without CONFIG_SCHEDSTATS
Latencytop will be probably a little more user friendly though.
-Andi
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