W dniu 2010-11-17 22:11, Kenneth Gober pisze:
quoted text
> 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 ??


------------
best regards,
RLW