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Re: removing an ext2fs file forces disk activity

From: Niels Möller
Subject: Re: removing an ext2fs file forces disk activity
Date: 26 Mar 2002 22:31:17 +0100
User-agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.1

tb@becket.net (Thomas Bushnell, BSG) writes:

> nisse@lysator.liu.se (Niels Möller) writes:
> > Perhaps idling, waiting for disk i/o requests to complete?
> Do a big tar extraction on Linux and note that your tar process soaks
> up plenty of CPU time. 

The numbers depend a lot on the actual hardware, and the relative
speed of the cpu and disks, I think. I just tried extracting
gcc-3.0.4.tar (note, no .gz, unzipping would soak up most of the idle
time). top reported that the tar process consumed about 60% cpu, and
an overall CPU usage of about 10% user, 50% system and 40% idle.

This is on my good old Sparc station 4, a reasonably modern (low-end,
less than two years old) IBM scsi disk, and linux-2.2.19. I'd expect
more idle cycles on a modern machine and decent disk hardware, but I
don't have any around.


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