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Re: Higher than expected disk write(2) latency

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From: David Newall <davidn@...>
To: Martin Lucina <mato@...>
Cc: <linux-kernel@...>, Martin Sustrik <sustrik@...>
Subject: Re: Higher than expected disk write(2) latency
Date: Saturday, June 28, 2008 - 10:47 am

Martin Lucina wrote:

Measuring each write is lavish and bound to impact the results.  To
measure sustained throughput, get the time only at start and end, and
divide the difference by the number of writes.
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Messages in current thread:
Higher than expected disk write(2) latency, Martin Lucina, (Sat Jun 28, 8:11 am)
Re: Higher than expected disk write(2) latency, Andrew Morton, (Thu Jul 10, 1:27 am)
Re: Higher than expected disk write(2) latency, Martin Sustrik, (Thu Jul 10, 4:12 am)
Re: Higher than expected disk write(2) latency, Alan Cox, (Thu Jul 10, 4:31 am)
Re: Higher than expected disk write(2) latency, Martin Sustrik, (Fri Jul 11, 11:17 am)
Re: Higher than expected disk write(2) latency, Martin Sustrik, (Thu Jul 10, 9:17 am)
Re: Higher than expected disk write(2) latency, Andrew Morton, (Thu Jul 10, 9:18 am)
Re: Higher than expected disk write(2) latency, Andrew Morton, (Thu Jul 10, 4:14 am)
Re: Higher than expected disk write(2) latency, Chris Mason, (Thu Jul 10, 9:29 am)
Re: Higher than expected disk write(2) latency, Martin Lucina, (Thu Jul 10, 9:41 am)
Re: Higher than expected disk write(2) latency, Arjan van de Ven, (Thu Jul 10, 10:01 am)
Re: Higher than expected disk write(2) latency, Chris Mason, (Thu Jul 10, 10:18 am)
Re: Higher than expected disk write(2) latency, David Newall, (Sat Jun 28, 10:47 am)
Re: Higher than expected disk write(2) latency, Martin Sustrik, (Sun Jun 29, 7:34 am)
Re: Higher than expected disk write(2) latency, Roger Heflin, (Sat Jun 28, 9:11 am)
Re: Higher than expected disk write(2) latency, Martin Sustrik, (Mon Jun 30, 2:10 pm)
Re: Higher than expected disk write(2) latency, Roger Heflin, (Mon Jun 30, 3:02 pm)
Re: Higher than expected disk write(2) latency, Martin Sustrik, (Wed Jul 2, 12:48 pm)
Re: Higher than expected disk write(2) latency, Roger Heflin, (Wed Jul 2, 5:33 pm)
Re: Higher than expected disk write(2) latency, Jeff Moyer, (Wed Jul 2, 2:15 pm)
Re: Higher than expected disk write(2) latency, Martin Sustrik, (Wed Jul 2, 2:20 pm)
Re: Higher than expected disk write(2) latency, David Dillow, (Thu Jul 3, 11:16 pm)
Re: Higher than expected disk write(2) latency, Martin Sustrik, (Mon Jun 30, 6:20 pm)
Re: Higher than expected disk write(2) latency, Bernd Eckenfels, (Mon Jun 30, 8:11 pm)