From: "Martin J. Bligh" <mbligh@aracnet.com>
To: William Lee Irwin III <wli@holomorphy.com>,
"Bond, Andrew" <Andrew.Bond@hp.com>
Cc: Dave Hansen <haveblue@us.ibm.com>, linux-kernel@vger.kernel.org
Subject: Re: TPC-C benchmark used standard RH kernel
Date: Fri, 20 Sep 2002 15:07:34 -0700 [thread overview]
Message-ID: <81250000.1032559653@flay> (raw)
In-Reply-To: <20020920205653.GM3530@holomorphy.com>
>> This isn't as recent as I would like, but it will give you an idea.
>> Top 75 from readprofile. This run was not using bigpages though.
>> Andy
>
>> 00000000 total 7872 0.0066
>> c0105400 default_idle 1367 21.3594
>> c012ea20 find_vma_prev 462 2.2212
>> c0142840 create_bounce 378 1.1250
>> c0142540 bounce_end_io_read 332 0.9881
>> c0197740 __make_request 256 0.1290
>> c012af20 zap_page_range 231 0.1739
>> c012e9a0 find_vma 214 1.6719
>> c012e780 avl_rebalance 160 0.4762
>
> Looks like you're doing a lot of mmapping or faulting requiring VMA
> lookups, or the number of VMA's associated with a task makes the
> various VMA manipulations extremely expensive.
>
> Can you dump /proc/pid/maps on some of these processes?
Isn't that the magic Oracle 32Kb mmap hack at work here, in order
to get a >2Gb SGA?
M.
next prev parent reply other threads:[~2002-09-20 22:06 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-09-19 19:27 TPC-C benchmark used standard RH kernel Bond, Andrew
2002-09-19 20:40 ` Dave Hansen
2002-09-20 17:20 ` Mike Anderson
2002-09-20 17:31 ` Jens Axboe
2002-09-20 18:05 ` Mike Anderson
2002-09-20 20:56 ` William Lee Irwin III
2002-09-20 22:07 ` Martin J. Bligh [this message]
-- strict thread matches above, loose matches on Subject: below --
2002-09-20 17:43 Bond, Andrew
2002-09-19 21:18 Bond, Andrew
2002-09-19 21:48 ` Dave Hansen
2002-09-19 19:15 Bond, Andrew
2002-09-19 17:15 Bond, Andrew
2002-09-19 18:14 ` Dave Hansen
2002-09-19 19:05 ` Martin J. Bligh
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