Re: Early SPECWeb99 results on 2.5.33 with TSO on e1000

Robert Olsson
2002-09-11T07:34:48Z

> > Load "Mode"
> > -------------------
> > Lo 1) RxIntDelay=0
> > Mid 2) RxIntDelay=fix (When we had X pkts on the RX ring)
> > Hi 3) Consecutive polling. No RX interrupts.

Manfred Spraul writes:

> Sounds good.
>
> The difficult part is when to go from Lo to Mid. Unfortunately my tulip
> card is braindead (LC82C168), but I'll try to find something usable for
> benchmarking

21143 for tulip's. Well any NIC with "RxIntDelay" should do.

> In my tests with the winbond card, I've switched at a fixed packet rate:
>
> < 2000 packets/sec: no delay
> > 2000 packets/sec: poll rx at 0.5 ms

I was experimenting with all sorts of moving averages but never got a good
correlation with bursty network traffic as this level of resolution. The
only measure I found fast and simple enough for this was the number of
packets on the RX ring as I mentioned.

Cheers.
--ro