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http://bugzilla.kernel.org/show_bug.cgi?id=6068
Summary: UDP packet loss and slow communication
Kernel Version: 2.6.15.4
Status: NEW
Severity: normal
Owner: [EMAIL PROTECTED]
Submitter: [EMAIL PROTECTED]
Most recent kernel where this bug did not occur: 2.6.15.4
Distribution: Crux
Hardware Environment: Any of our system. several is based on Asus motboard and
P4 CPU or Tyan and P4 CPU.
Software Environment: HLDS and standard routing
Problem Description:
Since version 2.6.13.x we have got problem with slow UDP communication.
We have a lot of complaining from Steam/CS userers on our Game servers.
And we also get strange communication error through our main Router.
I'm not any programmer and can't found out more details because I'm not working
with development. I only install systems and configure them.
Steps to reproduce:
Basic install an 2.6.15.4 kernel from Crux LiveCD version 2.1 with udev.
http://jaeger.morpheus.net/linux/crux/files/crux-2.1-latest.iso
One installation is and pure Router with extra tweak's for buffering.
Installing HLDS (CS server) on this kernel version cause problem with a lot of
choke and a lot of udp pacet loss.. And the latencey is not stabel in the local
net. In general the latency is now more the 100% higher.
If I go back and use 2.6.12.6 then the problem is not there.
I'm sorry but I can't really define the problem more but I'm not a programmer.
On HLDS (CS servers) running without netfilter (IPTABLES) so that is not an
issue.
The Main router use NETFILTER but the problem will still be therer if I turn
IPTABLES off.. We only use netfilter for som blocking on the main router.
I have checked several settings in the /proc/sys/net/ipv4/
and /proc/sys/net/ipv4/netfilter some of this value is changed in the
mainrouter.
echo "65535" >/proc/sys/net/ipv4/netfilter/ip_conntrack_max
echo '1' > /proc/sys/net/ipv4/ip_forward
sleep 1
/etc/rc.route
# buffer
echo "512" > /proc/sys/net/ipv4/neigh/default/gc_thresh1
echo "2048" > /proc/sys/net/ipv4/neigh/default/gc_thresh2
echo "4096" > /proc/sys/net/ipv4/neigh/default/gc_thresh3
echo "45" > /proc/sys/net/ipv4/netfilter/ip_conntrack_tcp_timeout_close_wait
echo "600" > /proc/sys/net/ipv4/netfilter/ip_conntrack_tcp_timeout_established
/sbin/modprobe ip_conntrack hashsize=65535
No special settings is made on the HLDS servers.
Regards
Charlie G Mentorez...
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