| From: | Josh Berkus <josh(at)agliodbs(dot)com> |
|---|---|
| To: | pgsql-performance(at)postgresql(dot)org |
| Cc: | Manfred Spraul <manfred(at)colorfullife(dot)com>, Mark Wong <markw(at)osdl(dot)org>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, neilc(at)samurai(dot)com |
| Subject: | Re: futex results with dbt-3 |
| Date: | 2004-10-25 16:33:07 |
| Message-ID: | 200410250933.07550.josh@agliodbs.com |
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| Lists: | pgsql-performance |
Manfred,
> How complicated are Tom's test scripts? His immediate reply was that I
> should retest with Fedora, to rule out any gentoo bugs.
We've done some testing on other Linux. Linking in pthreads reduced CSes by
< 15%, which was no appreciable impact on real performance.
Gavin/Neil's full futex patch was of greater benefit; while it did not reduce
CSes very much (25%) somehow the real performance benefit was greater.
--
Josh Berkus
Aglio Database Solutions
San Francisco
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