Robert Olsson wrote:
Ben Greear writes:
> I tried setting the NICE level of pktgen to -10 and softirq to -18. I
> still see way more packets transmitted than received.
If you have "max_before_softirq" in your version pktgen you can try it
to balance your load. HZ=1000 in 2.6 can make scheduling different.
Yes, I was able to get it to smooth out by doing something like that. I
also got better desktop performance by simply decreasing the niceness of
the pktgen thread to 0 instead of -10.
On a related note, I am now working on a way to use a hook in the
netif_wake_queue callback to wake up pktgen. This should allow me to
have a pktgen that does not need to spin in a tight loop like it does
now. So far, I was able to saturate two GigE ports using about 3% of
the CPU (as reported by top), using 1514 byte pkts. Still tweaking
to fix some corner cases...
Ben Greear <greearb@xxxxxxxxxxxxxxx>
Candela Technologies Inc http://www.candelatech.com