Re: [Phoronix] Ubuntu 9.04 vs. Fedora 11 Performance

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> The question becomes what is significantly different in the Apache
> test? Is the Apache test essentially a network i/o test? What is
> significantly different here that would not end up being tracked to an
> upstream kernel networking stack regression? Is the apache performance
> collatoral damage from selinux related latency?    Something else in
> userspace slowing Apache down. I've no idea.   I can't imagine its
> compiler related options on the Apache binaries.

Without knowing how exactly the benchmark works I would guess that most
of those apache requests are kernel calls so SELinux _might_ make a huge
difference here. Perhaps somebody from the SELinux team should tell
phoronix about it (and to _always_ test with SELinux disabled to measure
the price of security).

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