cvs commit: src/sys/kern kern_descrip.c
jroberson at chesapeake.net
Mon Jul 23 22:24:03 UTC 2007
On Mon, 23 Jul 2007, Attilio Rao wrote:
> 2007/7/23, Jeremie Le Hen <jeremie at le-hen.org>:
>> Hi Jeff,
>> On Tue, Jul 03, 2007 at 02:27:51PM -0700, Jeff Roberson wrote:
>> > For the curious, these last two patches make a substantial improvement
>> > mysql write performance on my 8way opteron:
>> > http://people.freebsd.org/~jeff/mysqlwrite.png
>> > The green line is without and the blue line is with.
>> Just for information, do you have any hint why Linux eventually
>> performs better above 18 threads?
> IIRC, this workload is lockmgr() dominated now, which is particulary
> unlucky for us since they are very heavy.
Attilio should also mention that he is fixing this problem as his SoC
project. I expect to see good gains once this is complete.
> Peace can only be achieved by understanding - A. Einstein
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