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Achilles
Apprentice
Joined: 03 Jun 2002
Posts: 259
Location: Chicago
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 Posted: Thu Sep 18, 2003 11:26 pm Post subject: Extreme system slowdown when reading/writing data? |
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| After reinstalling gentoo with what I thought was the same options (although an upgraded kernel), my system is rendered almost useless when dealing with any large file. This ranges from unpacking source from an emerge to allocating new space for a bittorrent. The mouse moves very slow and everything else is slow to respond. Does anyone know what might have caused this? |
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jbrown
Tux's lil' helper
Joined: 17 Feb 2003
Posts: 81
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| Posted: Fri Sep 19, 2003 12:07 am Post subject: |
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somebody put him out of his misery
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Achilles
Apprentice
Joined: 03 Jun 2002
Posts: 259
Location: Chicago
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| Posted: Fri Sep 19, 2003 12:11 am Post subject: |
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I don't like the sound of that   |
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jbrown
Tux's lil' helper
Joined: 17 Feb 2003
Posts: 81
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| Posted: Fri Sep 19, 2003 12:25 am Post subject: |
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DMA - Direct Memory Access
When enabled, the drive can write directly into RAM as opposed to the processor reading data into the processor and then back out to RAM.
| Code: | emerge hdparm
hdparm /dev/hd? or whatever |
to see if its enabled.
| Code: | | hdparm -d /dev/hd? to enable |
to try and activate it.
There is a hdparm rc script you could try:
| Code: | | rc-update add hdparm default |
If it won't enable you may have to configure your kernel again. Look closely at the different IDE options.
multcount, IO_support, unmaskirq and readahead also affect performance
On the other hand - it could be something completely different...
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drakonite
l33t
Joined: 02 Nov 2002
Posts: 768
Location: Lincoln, NE
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| Posted: Fri Sep 19, 2003 12:49 am Post subject: |
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Also make sure that if your computer uses a VIA chipset that you enable VIA chipset support in your kernel (somewhere in the mess of hard drive options...).
Otherwise your via chipset will have no busmastering and it'll slow your computer to a halt when doing disk reads/writes.
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Achilles
Apprentice
Joined: 03 Jun 2002
Posts: 259
Location: Chicago
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| Posted: Fri Sep 19, 2003 1:50 am Post subject: |
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| Thanks for your replies! I don't have a via chipset, but adding it to my default run level worked like a charm! |
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