Re: Accuracy of profiling

On 05/06/15 15:26, Mahmood N wrote:

> Assume without any speculation, ocount reports that the execution
> took 20 seconds. Now we enable some speculations (TLB, PF, ....) and
> now, ocount reports that the execution took 18 seconds. The question
> is, which one reduced the execution time? The caching effect (disk
> and IO caches done by OS) or the speculations?

Hard to say.  I'd not bother with this kind of analysis on a large
application to begin with, but study a small sample and gradually make
it larger.

BTW, you should at least be running this in single user mode.

Andrew.

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