Hi!
I played a little around with the interrupt latency of my card and SMP:
MPS1.1:
works with my motherboard (CUV4X-D) with RTL and Linux 2.2 & 2.4.
Interrupt latency: ~40us
MPS1.4:
doesn't work with the motherboard with Linux 2.4 in 50% of the cases
==> 2.4 not used
interrupt latency with 2.2.19 and RTL3.1: ~20us
When I work with a mixture of hardware based timing and polling I can
get latencies (now without interrupt latency) of 1-4 us ...
Has anyone similar experiences (or the opposite - then I'm sure that my
motherboard is weird)?
Wasn't one of the goals of the whole APIC architecture reducing latencies???
Thanks for any answer
Stefan
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