Re: Perf regression in 2.6.32 (Ubuntu 10.04 LTS) - Mailing list pgsql-hackers

From Domas Mituzas
Subject Re: Perf regression in 2.6.32 (Ubuntu 10.04 LTS)
Date
Msg-id DE4CA5B3-194C-4228-A8FA-12057C3A36E4@gmail.com
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In response to Re: Perf regression in 2.6.32 (Ubuntu 10.04 LTS)  (Heikki Linnakangas <heikki.linnakangas@enterprisedb.com>)
List pgsql-hackers
Hello,

> Can you run oprofile on the older kernel, so that we can compare and see where the time is spent?
> Looks like over 7% of the time is spent in s_lock, which suggests some change in behavior in context switching or
somethinglike that, but let's see what the old profile looks like. 

I grabbed the 2.6.28.2 as a loaner from prod boxes I had around, may take a while to do that again.
Will see if I can get some nehalem loaners (or do these tests at other environment) to do more modern hardware
comparison. 

Domas

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