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Re: Slow disk access

From: Yoshinori K. Okuji
Subject: Re: Slow disk access
Date: Fri, 4 Feb 2005 23:38:46 +0100
User-agent: KMail/1.7.1

On Friday 04 February 2005 22:11, Marco Gerards wrote:
> The disk access on GRUB 2 is terribly slow.  At first I thought it
> was only a problem on the PPC, but it is also showing up in grub-emu
> and I guess on the PC as well.  You can notice the problem when
> reading in big files, like a big kernel.  Reading in a 20MB files
> takes 17 seconds.

I don't see such a problem with grub-emu on PC. I tested the current CVS 
version. I made a hard disk image with ext2, put a 20MB file on it and 
run "cat (hd0,0)/foo" with the output of cat disabled (I modified the 
code). It took about 2 seconds on my laptop. Since my disk is really 
slow, I think this is normal. I did this test after I "cat" two ISO 
image files to /dev/null to flush the cache of the hard disk image.

So I guess it is specific to PowerPC.


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