I/O on uclibc

[Luciano Rocha]

On Mon, Aug 13, 2007 at 12:31:16PM +0800, Ming-Ching Tiew wrote:
> 
> Here I am runing an I/O test on the same computer, one with with
> Fedora Core 5 ( kernel 2.6.21.3 ) and one with uclibc-0.9.28
> ( kernel 2.6.18 ), using bonnie-1.4 ( a very old program and
> maybe buggy with respect to the big size files ),  this is the result :-

<snip>

> It seems that the I/O on uclibc-based system runs better than a FC5 system.
> This is will opposite to my expectation.

I'd expect the stdio subsystem in uclibc to be simpler, so faster in
some circunstances. As your system seems to be cpu-bounded in the glibc
tests (> 85% cpu when using stdio), uclibc would be faster.

> However, when I run the bonnie++-1.93c ( statically compiled version since
> the said uclibc system does not have C++ runtime ), the performance of both
> configurations are almost identical.

If it's statically compiled, you're only testing the kernel, and the
instaled libc has no effect.

BTW, it would be better if you tested both libcs with the same kernel.

-- 
lfr
0/0
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 189 bytes
Desc: not available
Url : http://busybox.net/lists/uclibc/attachments/20070813/8c4070ac/attachment.pgp