Re: 2.1.114 VFS code 5x slower than 2.0.33?!?

Alan Cox (alan@lxorguk.ukuu.org.uk)
Sun, 9 Aug 1998 02:21:52 +0100 (BST)


> > You can use the kernel profiling to find out. Also remember to compare
> > non SMP kernels with non SMP kernels
>
> Hm. How can dcache be slower and better at the same time? :)

If you look at the numbers the machine spent more clock time doing less
system time work. So if the dcache is slowing it then its because its causing
paging. Someone else suggested its the writeback of a deleted inode that
may be involved

> > Can you see if 2.1.115ac1 is any better on this benchmark on your box
> I'll check, as soon as I sit physically at my machine (tomorrow).

I'd expect similar slower wallclock but even lower system time

Alan

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