Messages in this thread | | | Date | Tue, 03 Jun 2003 23:04:02 -0700 | From | Nivedita Singhvi <> | Subject | Re: fix TCP roundtrip time update code |
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David Mosberger wrote:
> $ httperf --rate 1000 --num-conns 1000000 --verbose --hog --server HOST \ > --uri pathto30KBfile
Hmm, ditto, except I was way down at --rate 300 (was seeing client errors of fd-unavail). Have ulimited upwards but am still seeing them..
> on 3 clients (for a total of 3000 conns/sec). You can't go higher > than 1000 conn/sec per client (IP address) because otherwise you run > out of port space (due to TIME_WAIT).
You can hike /proc/sys/net/ipv4/tcp_tw_recycle for that.
> This load worked well for a machine with a single GigE card. All > network tunables were on the default setting (in particular, the tx > queue len was 300, which is were the losses came from). > > With this load, I saw bad RTT values in the route cache within a > couple of seconds after starting the third httperf generator. It then > took a bit longer (on the order of 1-2 minutes) until the first > TCPAbortFailed errors started to pop up
I saw a few AbortOnTimeouts, but no AbortFailed counts.
Those should be TCPAbortOnTimeout counts, rather than TCPAbortFailed errors, I would expect? Why AbortFailed? Coming from IP via tcp_transmit_skb()?
thanks, Nivedita
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