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* 2.6.0-test9 - poor swap performance on low end machines
@ 2003-10-29 22:30 Chris Vine
  2003-10-31  3:57 ` Rik van Riel
  0 siblings, 1 reply; 63+ messages in thread
From: Chris Vine @ 2003-10-29 22:30 UTC (permalink / raw)
  To: linux-kernel

Hi,

I have been testing the 2.6.0-test9 kernel on a couple of desktop machines.  
On the first, a 1.8GHz Pentium 4 uniprocessor with 512MHz of RAM, it seems to 
perform fine, and on various compilation tests, compile times for the test 
programs I have compiled are pretty much the same as those obtained with a 
stock 2.4.22 kernel, and the 2.6 kernel seems to be slightly more responsive 
on the desktop.  Nothing I use it for knocks it substantially into swap.

However, on a low end machine (200MHz Pentium MMX uniprocessor with only 32MB 
of RAM and 70MB of swap) I get poor performance once extensive use is made of 
the swap space.  On a test compile of a C++ program involving quite a lot of 
templates and therefore which is quite memory intensive, it chugs along with 
the stock 2.4.22 kernel and completes the compile in about 10 minutes going 
(at its worst) into about 34MB of swap.  However, doing the same compile on 
the 2.6.0-test9 kernel, it reaches about 22MB into swap and then goes into 
some kind of swap frenzy, continuously swaping and unswapping.  Even after 
leaving it for an hour it continuously swaps and unswaps and fails to compile 
even the first file (which takes about 2 minutes using the 2.4.22 kernel) and 
sticks at about 24MB of swap.  The kernel is compiled with gcc-2.95.3.

Chris.

PS Please copy any replies to my e-mail address.


^ permalink raw reply	[flat|nested] 63+ messages in thread

end of thread, other threads:[~2003-12-18 23:39 UTC | newest]

Thread overview: 63+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2003-10-29 22:30 2.6.0-test9 - poor swap performance on low end machines Chris Vine
2003-10-31  3:57 ` Rik van Riel
2003-10-31 11:26   ` Roger Luethi
2003-10-31 12:37     ` Con Kolivas
2003-10-31 12:59       ` Roger Luethi
2003-10-31 12:55     ` Ed Tomlinson
2003-11-01 18:34       ` Pasi Savolainen
2003-11-06 18:40       ` bill davidsen
2003-10-31 21:52   ` Chris Vine
2003-11-02 23:06   ` Chris Vine
2003-11-03  0:48     ` Con Kolivas
2003-11-03 21:13       ` Chris Vine
2003-11-04  2:55         ` Con Kolivas
2003-11-04 22:08           ` Chris Vine
2003-11-04 22:30             ` Con Kolivas
2003-12-08 13:52           ` William Lee Irwin III
2003-12-08 14:23             ` Con Kolivas
2003-12-08 14:30               ` William Lee Irwin III
2003-12-09 21:03               ` Chris Vine
2003-12-13 14:08               ` Chris Vine
2003-12-08 19:49             ` Roger Luethi
2003-12-08 20:48               ` William Lee Irwin III
2003-12-09  0:27                 ` Roger Luethi
2003-12-09  4:05                   ` William Lee Irwin III
2003-12-09 15:11                     ` Roger Luethi
2003-12-09 16:04                       ` Rik van Riel
2003-12-09 16:31                         ` Roger Luethi
2003-12-09 18:31                       ` William Lee Irwin III
2003-12-09 19:38                       ` William Lee Irwin III
2003-12-10 13:58                         ` Roger Luethi
2003-12-10 17:47                           ` William Lee Irwin III
2003-12-10 22:23                             ` Roger Luethi
2003-12-11  0:12                               ` William Lee Irwin III
2003-12-10 21:04                           ` Rik van Riel
2003-12-10 23:17                             ` Roger Luethi
2003-12-11  1:31                               ` Rik van Riel
2003-12-11 10:16                                 ` Roger Luethi
2003-12-10 23:30                           ` Helge Hafting
2003-12-10 21:52                 ` Andrea Arcangeli
2003-12-10 22:05                   ` Roger Luethi
2003-12-10 22:44                     ` Andrea Arcangeli
2003-12-11  1:28                       ` William Lee Irwin III
2003-12-11  1:32                         ` Rik van Riel
2003-12-11 10:16                       ` Roger Luethi
2003-12-15 23:31                       ` Andrew Morton
2003-12-15 23:37                         ` Andrea Arcangeli
2003-12-15 23:54                           ` Andrew Morton
2003-12-16  0:17                             ` Rik van Riel
2003-12-16 11:23                             ` Roger Luethi
2003-12-16 16:29                               ` Rik van Riel
2003-12-17 11:03                                 ` Roger Luethi
2003-12-17 11:06                                   ` William Lee Irwin III
2003-12-17 16:50                                     ` Roger Luethi
2003-12-17 11:33                                   ` Rik van Riel
2003-12-17 18:53                               ` Rik van Riel
2003-12-17 19:27                                 ` William Lee Irwin III
2003-12-17 19:51                                   ` Rik van Riel
2003-12-17 19:49                                 ` Roger Luethi
2003-12-17 21:41                                   ` Andrew Morton
2003-12-17 21:41                                   ` Roger Luethi
2003-12-18  0:21                                     ` Rik van Riel
2003-12-18 22:53                                       ` Roger Luethi
2003-12-18 23:38                                         ` William Lee Irwin III

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