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On Sat, 4 Aug 2007, Ray Lee wrote: > On 8/4/07, david@lang.hm <david@lang.hm> wrote: >> On Sat, 4 Aug 2007, Ingo Molnar wrote: >> > At least on a surface level, your report has some similarities to > http://lkml.org/lkml/2007/5/21/84 . In that message, John Miller > mentions several things he tried without effect: > > < - I increased the max allowed receive buffer through > < proc/sys/net/core/rmem_max and the application calls the right > < syscall. "netstat -su" does not show any "packet receive errors". mercury1:/proc/sys/net/core# cat rmem_* 124928 131071 mercury1:/proc/sys/net/core# netstat -su Udp: 697853177 packets received 10025642 packets to unknown port received. 191726680 packet receive errors 63194 packets sent RcvbufErrors: 191726680 UdpLite: mercury1:/proc/sys/net/core# echo "512000" >rmem_max > < - After getting "kernel: swapper: page allocation failure. > < order:0, mode:0x20", I increased /proc/sys/vm/min_free_kbytes I have not seen any similar errors > < - ixgb.txt in kernel network documentation suggests to increase > < net.core.netdev_max_backlog to 300000. This did not help. mercury1:/proc/sys/net/core# cat netdev_* 300 1000 mercury1:/proc/sys/net/core# echo "300000" >netdev_max_backlog > < - I also had to increase net.core.optmem_max, because the default > < value was too small for 700 multicast groups. I'm not running multicast. > As they're all pretty simple to test, it may be worthwhile to give > them a shot just to rule things out. unfortunantly the load is not high enough right now to see a real difference (it's only doing ~1400 logs/sec) I'll catch it at a higher load point to see if these make any difference. David Lang > Ray > - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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