Ar Gwe, 2006-10-13 am 16:02 -0700, ysgrifennodd Open Source:
> clear understanding of what is causing it. As it stands it doesn't
> seem like even the experts know exactly where this
> delay is being caused.
strace should tell you precisely how long each syscall takes if you ask
it to trace things nicely. If you have code trying to wait for a tiny
time then HZ will bump the wait to be longer (kernel or user) but for
other cases all should be fine either way.
The other issues like priority and paging caused delays can generally be
dealt with by having the relevant service code running mlockall and real
time priority.
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