Messages in this thread | | | From | "Jeroen Geusebroek" <> | Subject | RE: kupdate, high CPU usage | Date | Mon, 31 Jul 2000 22:44:39 +0200 |
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>> Could someone explain what kupdate and kflushd do? I have a >> strange problem, when i ftp to my server, i get like 6500Kb/s >> for the first then seconds. That's the same speed i get to >> another server on the same subnet. >> >> But within a few seconds the CPS suddenly drops to 2500kb/s and >> when i look at the server i see that kupdate takes 80% of the >> cpu usage.
>This is expected behaviour. After memory is filled with >dirty buffers, the programs writing to disk are slowed >down to disk speeds.
That's what i also thought, only i knew the HD could handle it.
>> I tried to disable kupdate ( i searched the mailinglist on how >> to do that ) kflushd had the same behaviour.
>*sigh* ;)
Well, it is really on the list. Search the archives :)
>> Coould some explain what could be causing the trouble? I'm using >> the 2.2.16 kernel.
>You're slowed down to 2500kb/s either because the disk isn't >faster or because you forgot to use hdparm to switch your >drive to DMA mode...
Well, it was in fact the DMA problem, i was thinking about that a few minuts after i wrote to the list. Sorry for the 'spam' :)
Greets,
Jeroen
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