Messages in this thread | | | Date | Mon, 4 Feb 2008 00:08:28 +0800 | From | "Jeff Chua" <> | Subject | Re: cups slow on linux-2.6.24 |
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On Feb 2, 2008 10:44 PM, Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> wrote:
> Could I ask you to make two another tests? (I have been unable to > reproduce the bug so far, but it must be my fault.)
You need to send more than 510 jobs to see the problem.
> In both cases enable loggin invalid messages as Patrick wrote in a previous mail: > # modprobe ipt_LOG > # echo 255 >/proc/sys/net/netfilter/nf_conntrack_log_invalid
Ok.
> In the first case run the unpatched 2.4.24 kernel and before doing > any printing, start dumping all the traffic at the 515 port so that we > won't miss any connection and send the dump file: > # tcpdump -i lo -s 0 -w dump.pcap tcp port 515
Attached are the file dump1.bad, and dmesg.bad.
The console only starts printing out the "nf_ct_tcp: invalid packed ignored" messages after the 22 seconds "pause". Look for pause at "23:40:27.454677", and resume at "23:40:59.469704". The first console message at "23:40:59".
> In the second case run the patched kernel and just start printing: do you > get any 'nf_ct_tcp: invalid SYN' kernel message?
No such message. Even after trying many times. But there's still a 26 "pause" from "23:49:41.368812" to "23:50:07.392278". It's able to resume and continue printing in "burst".
These tests were ran with just 520 jobs using:
for((i=1; i<520;i++)); do echo $i | lpr -Plp; done
Sorry for the delay. Traveling.
Thanks, Jeff.
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