Re: Is this CPU usage normal ?
From: Quaoar (quaoar_at_tenthplanet.net)
Date: 07/28/04
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Date: Wed, 28 Jul 2004 07:56:58 -0600
H.S. wrote:
> When using winrar du unrar large files (ex. 4GB) winrar only uses
> around 20% of the CPU power. Therefore a 4 GB file takes 25 hours to
> unrar.
> Winrar is the only program running. I have installed newest bios on
> my Asus P4S8X-X motherboard, newest ide driver etc. But nothing has
> increased the unrar speed.
>
> does anyone have any suggestions as to how i can make unrar use more
> cpu power (and reduce unrar time) ?
>
> Any help will be much appreciated.
>
> PS. I hope this is the correct newsgroup ?
>
> --
There is something amiss. A 1GB rar will take only 20 or so seconds on
my P4. If you are dealing with avi files, note that rar or zip
compression is not necessary - the avi is already a compressed file, as
is a jpg file for that matter. In any event check that the HDs are set
up for DMA in device manager. If in PIO mode, it could explain the
excessive decompression time. Also, when working with these large
files, take care to keep the HD defragmented, even if defrag says it is
not necessary, and that you have suffient free HD space available. DMA,
HD fragmentation, and HD free space might be conspiring to drag the
entire decompression down to a crawl.
BTW a zip and a rar file are both similar, if not identically,
compressed.
Q
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