Re: Threaded execution (was: Interesting Bugs in 12cR1)
- From: Niall Litchfield <niall.litchfield@xxxxxxxxx>
- To: Frits Hoogland <frits.hoogland@xxxxxxxxx>
- Date: Fri, 12 Jul 2013 19:08:36 +0100
On Jul 12, 2013 6:28 PM, "Frits Hoogland" <frits.hoogland@xxxxxxxxx> wrote:
>
> It depends on where the time is spend. Use perf top or record to
> measure functions for threaded and non threaded performance.
I'm so glad you said that :). Consistently when I do this (on a vm) the
greatest single sample count is for acpi_pm_read. There's no good
explanation I've found for this. I have some ideas but 30% of samples in
this call compared with <5% in the various qer* Oracle function calls seems
wrong in a swingbench test. I suspect I'm missing the idiots guide to
perf/linux kernel functions..
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