W dniu 2010-11-17 22:11, Kenneth Gober pisze:
this is very illuminating. it says that initially, tcp send/receive
window is your bottleneck. when you increase them to 131072, the cpu
becomes your bottleneck and remains that way no matter what else you
tweak (idle drops to 0.0% and stays there).
the next question is, of course, why is your cpu spending all its time
in "system" and "interrupt"? is it doing unnecessary work, or is the
work necessary and your cpu just isn't fast enough? I don't have ready
answers to these questions.
-ken
Hello,
I see, that while I am testing network speed by iperf, 100% CPU is being
used, but is that normal for default install of OpenBSD 4.8 with default
pf.conf??
I have second computer exactly like that one (IBM ThinkCentre A51P), on
which i am running this tests but with P4 3Ghz CPU 2mb cache (not
celeron 2.8) and the same is happening (100% CPU).
LAN interface is Intel PRO/1000 PT Desktop Adapter (PCIe, model:
EXPI9300PTBLK) and this is the only pcie adapter in computer (maybe
broadcom integrated nic is also pcie but is not used)
So the conclusion might be:
- there is problem with my Intel NIC model/cheapset
- there is problem with em driver
- there is problem with my hardware (I need serwer motherboard with pcie
and pci 64bit 66mhz)
- I need faster CPU than P4 3GHz ??
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best regards,
RLW
