Alexey Popov wrote:
Hi.
Robert Watson wrote:
I tried SCHED_ULE, but got no difference:
Did you see no change in throughput, or no change in reported CPU use?
No significant changes.
We should probably take this thread to performance@ and get Kris
involved. He may be interested in trying to reproduce your workload
in our testbed so we can perform measurements of our own, as well as
getting you to provide profiling information. One of the things we'd
most like to have are nice potted benchmarks for real-world workloads,
as that allows us to easily replay them, perform measurements,
optimize, etc.
I can provide all profiling or configuration information you ask for.
Except I can't provide PHP site source codes.
Now I'm in situation that I can't install FreeBSD on all new servers
because they are all based on 2xquad-core processors and I can't be sure
it would work good.
Running mutex profiling for e.g. 1 minute of representative load would
be a useful starting point, as well as hwpmc profiling for the same
duration.
My guess is that you're hitting contention in the TCP send path, but I
missed the start of this conversation so I don't know what problems you
are seeing.
Kris
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