Re: -mmX 4G patches feedback [numbers: how much performance impact]

[Andrea Arcangeli]

On Wed, Apr 07, 2004 at 03:54:27PM -0700, Martin J. Bligh wrote:
> Or was this another workload, where gettimeofday wasn't the problem?

mysql is another common -30% slowdown where gettimeofday shouldn't be
the problem.  Any threaded application doing I/O should have major
scalability problems with 4:4 regardless the tlb flushing frequency, the
more cpus the biggest the hit (I should say mm_switch frequency [not tlb
flush frequency] after my latest benchmark results)
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