Re: measuring kernel speed

[Akemi Yagi <amyagi@xxxxxxxxx>]

On Mon, May 10, 2010 at 8:00 AM, JohnS <jses27@xxxxxxxxx> wrote:
>
> On Mon, 2010-05-10 at 07:31 -0700, Akemi Yagi wrote:
>> On Mon, May 10, 2010 at 6:46 AM, Ross Walker <rswwalker@xxxxxxxxx> wrote:

>> > Oprofile will show where those precious latencies timings are being
>> > used. It of course adds latency itself, so this should be factored
>> > into the latency timings.
>> >
>> > It will time all kernel operations then you can drill down into
>> > particular modules/routines to see more granularity.
>> >
>> > Needs debug symbols to be fully useful. Can provide timings as source
>> > code annotations.
>>
>> I never thought someone would run oprofile with the RT kernel. I can
>> upload debuginfo if anyone needs it.

> Actually you need kernel-trace also in there.  Trace is what is
> recomended by TUV.

I have kernel-rt-trace up there ...

Akemi
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