amd64/152405: wrong user time is reported when CPU frequency
avg at freebsd.org
Wed Nov 24 14:30:16 UTC 2010
The following reply was made to PR amd64/152405; it has been noted by GNATS.
From: Andriy Gapon <avg at freebsd.org>
<koie at suri.co.jp>
Cc: bug-followup at freebsd.org
Subject: Re: amd64/152405: wrong user time is reported when CPU frequency
Date: Wed, 24 Nov 2010 16:19:24 +0200
on 24/11/2010 15:54 Andriy Gapon said the following:
> Anyway, it seems that I missed the real cause of this problem and the excellent
> explanation by Bruce.
Could you please try the following (work-in-progress) patch?
I expect that it should improve accuracy for your testcase, but may penalize
system performance to certain degree.
As mav@ has said, performance, accuracy, powerstate management - pick any two of
the three. OTOH, I am not sure by how much the performance could be affected.
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