Re: horrible disk thorughput on itanium

Andi Kleen
2001-12-06T22:14:07Z

Andrew Morton <akpm@zip.com.au> writes:
>
> The fact that you get the same throughput on each platform with
> the block I/O part of the test indicates that the hardware and
> kernel are OK, but the C library is broken.

The usual difference is if you have a pthreads capable C library
or not. For newer glibc bonnie++ should definitely use
putc_unlocked(); otherwise it'll eat lock overhead for each character
to take the FILE lock.

As far as I can see bonnie++ doesn't use putc_unlocked, but putc.

With libc5 it likely would magically get a lot faster @)

-Andi