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From: Andrew Morton <akpm@digeo.com>
To: linux-kernel@vger.kernel.org
Subject: iosched: effect of streaming write on interactivity
Date: Thu, 20 Feb 2003 21:24:39 -0800	[thread overview]
Message-ID: <20030220212439.1a103a44.akpm@digeo.com> (raw)
In-Reply-To: <20030220212304.4712fee9.akpm@digeo.com>


It peeves me that if a machine is writing heavily, it takes *ages* to get a
login prompt.

Here we start a large streaming write, wait for that to reach steady state
and then see how long it takes to pop up an xterm from the machine under
test with

	time ssh testbox xterm -e true

there is quite a lot of variability here.

2.4.21-4:	62 seconds
2.5.61+hacks:	14 seconds
2.5.61+CFQ:	11 seconds
2.5.61+AS:	12 seconds


  parent reply	other threads:[~2003-02-21  5:13 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-02-21  5:23 IO scheduler benchmarking Andrew Morton
2003-02-21  5:23 ` iosched: parallel streaming reads Andrew Morton
2003-02-21  5:24 ` Andrew Morton [this message]
2003-02-21  5:25 ` iosched: effect of streaming read on interactivity Andrew Morton
2003-02-21  5:25 ` iosched: time to copy many small files Andrew Morton
2003-02-21  5:26 ` iosched: concurrent reads of " Andrew Morton
2003-02-21  5:27 ` iosched: impact of streaming write on streaming read Andrew Morton
2003-02-21  5:27 ` iosched: impact of streaming write on read-many-files Andrew Morton
2003-02-21  5:27 ` iosched: impact of streaming read " Andrew Morton
2003-02-21 10:40   ` Andrea Arcangeli
2003-02-21 10:55     ` Nick Piggin
2003-02-21 11:23       ` Andrea Arcangeli
2003-02-21 21:11     ` Andrew Morton
2003-02-23 15:16       ` Andrea Arcangeli
2003-02-25 12:02       ` Pavel Machek
2003-02-21  5:28 ` iosched: effect of streaming read on streaming write Andrew Morton
2003-02-21  6:51 ` IO scheduler benchmarking David Lang
2003-02-21  8:16   ` Andrew Morton
2003-02-21 10:31     ` Andrea Arcangeli
2003-02-21 10:51       ` William Lee Irwin III
2003-02-21 11:08         ` Andrea Arcangeli
2003-02-21 11:17           ` Nick Piggin
2003-02-21 11:41             ` Andrea Arcangeli
2003-02-21 21:25               ` Andrew Morton
2003-02-23 15:09                 ` Andrea Arcangeli
2003-02-21 11:34           ` William Lee Irwin III
2003-02-21 12:38             ` Andrea Arcangeli

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