High CPU usage during disk IO? Is this normal?
I have two pc's that I've recently converted to Debian Lenny boxes, and I've noticed that whenever there's a lot of disk IO, one of my cores (both pc's have dual core cpu's) jumps to 100%. Is this normal? They're both x86_64, and I think both of them should be using the AHCI SATA driver.
If you need any more information about my setup, let me know. This is the lspci for one of the computers: Code:
00:00.0 Host bridge: Intel Corporation Mobile PM965/GM965/GL960 Memory Controller Hub (rev 0c) Code:
2.6.26-2-amd64 |
How long is this "jump"? If we are talking only for a few seconds or the extent of the process, than this is perfectly normal.
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During those times top doesn't show any process eating cpu, but gnome system monitor shows high usage. |
Perfectly normal. It isn't a question of "how much cpu" the process takes, every process will take full advantage of the processing power available to it, i.e. max out your processor. You want this, it is a good thing. There's no reason to get a fast processor if you aren't going to make full use of it. ;)
Edit: Wikipedia will explain this more fully and better than I can in a forum post. |
Ah okay, Thanks :) I looked at the color in gnome system monitor and what I'm seeing is "IOWait". If that's the way it's supposed to be then that's fine - I guess I'm still learning things every day even though I've been using linux for about three years now :)
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What filesystem are you using ? Did you try doing this from the command line ? does it do the same thing ? I wouldn't be so quick to mark things as solved, unless you are completely convinced they are solved. |
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