From: Pavel Machek <pavel@ucw.cz>
To: Dan Magenheimer <dan.magenheimer@oracle.com>
Cc: linux-kernel@vger.kernel.org, npiggin@suse.de, akpm@osdl.org,
jeremy@goop.org, xen-devel@lists.xensource.com,
tmem-devel@oss.oracle.com, kurt.hackel@oracle.com,
Russell <rusty@rustcorp.com.au>, Rik van Riel <riel@redhat.com>,
dave.mccracken@oracle.com, linux-mm@kvack.org,
Rusty@rcsinet15.oracle.com, sunil.mushran@oracle.com,
Avi Kivity <avi@redhat.com>, Schwidefsky <schwidefsky@de.ibm.com>,
Balbir Singh <balbir@linux.vnet.ibm.com>,
Marcelo Tosatti <mtosatti@redhat.com>,
alan@lxorguk.ukuu.org.uk, chris.mason@oracle.com
Subject: Re: Tmem [PATCH 0/5] (Take 3): Transcendent memory
Date: Fri, 18 Dec 2009 09:06:31 +0100 [thread overview]
Message-ID: <20091218080631.GA1374@ucw.cz> (raw)
In-Reply-To: <23e2d3ad-2611-4422-9349-50e4d3d8377f@default>
Hi!
> Performance is difficult to quantify because some benchmarks respond
> very favorably to increases in memory and tmem may do quite well on
> those, depending on how much tmem is available which may vary widely
> and dynamically, depending on conditions completely outside of the
> system being measured. Ideas on how best to provide useful metrics
> would be appreciated.
So... take 1GB system, run your favourite benchmark. Then reserve
512MB for tmem, rerun your benchmark, then run the system with
512MB/512MB swap, rerun the benchmark?
Tune the sizes so that first to last run differ by 100% or so, and see
how much first and second differs? If it is in 1% range, you are
probably doing good...?
Pavel
--
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next prev parent reply other threads:[~2009-12-18 8:06 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-18 0:36 Dan Magenheimer
2009-12-18 8:06 ` Pavel Machek [this message]
2009-12-21 10:54 ` Nitin Gupta
2009-12-21 13:46 Nitin Gupta
2009-12-21 23:46 ` Dan Magenheimer
2009-12-23 6:28 ` Nitin Gupta
2009-12-23 17:15 ` Dan Magenheimer
2009-12-24 3:27 ` Nitin Gupta
2009-12-24 20:51 ` Dan Magenheimer
2009-12-25 19:18 ` Pavel Machek
2009-12-28 15:57 ` Dan Magenheimer
2009-12-28 20:51 ` Pavel Machek
2009-12-28 21:41 ` Dan Magenheimer
2009-12-29 2:07 ` Nitin Gupta
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