On Mon, Jun 27, 2005 at 05:33:43PM +1000, Nick Piggin wrote:
> >Maybe adding a prefetch for it at the beginning of sys_read()
> >might help, but then with 64CPUs writing to parts of the inode
> >it will always thrash no matter how many prefetches.
> >
>
> True. I'm just not sure what is causing the bouncing - I guess
> ->f_count due to get_file()?
That's in the file, not in the inode. It must be some inode field.
I don't know which one.
There is probably some oprofile/perfmon event that could tell
you which function dirties the cacheline.
-Andi
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