These benchmarks demonstrate the marked difference when running VMware
on Feisty.
Ubuntu 7.04, 2.6.20-15-server, i386, VMware 1.0.3, 14 guests running,
Ubuntu-packaged vmmon/vmnet
Version 1.03 ------Sequential Output------ --Sequential Input- --Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
ziggy 32G 51084 23 21469 10 92143 20 145.7 4
Ubuntu 6.10, 2.6.17-11-server, i386, VMware 1.0.3, 14 guests running
Version 1.03 ------Sequential Output------ --Sequential Input- --Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
ziggy 32G 105453 41 44506 20 109565 21 230.6
1
** Note **
I am not suggesting this problem is VMware related, since the performance
degradation is observable on a box with no VMware running (ie, no load at all).
Running VMware is the role of these servers however, and is one of the easiest
ways to load up the box with a real world load.
--
kernel 2.6.20 disk write performance much slower than 2.6.17
https://bugs.launchpad.net/bugs/113532
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