[BUG,REGRESSION?] 3.11.6+,3.12: GbE iface rate drops to few KB/s
Arnaud Ebalard
arno at natisbad.org
Thu Nov 21 17:55:09 EST 2013
Hi eric,
Eric Dumazet <eric.dumazet at gmail.com> writes:
>> > I tested it on my RN2120 (2-core armada XP): I got no problem and the
>> > link saturated w/ apache, nginx and netperf. Good work!
>>
>> Great, thanks for your tests Arnaud. I forgot to mention that all my
>> tests this evening involved this patch as well.
>
> Now you might try to set a lower value
> for /proc/sys/net/ipv4/tcp_limit_output_bytes
On the RN2120, for a file served from /run/shm (for apache and nginx):
Apache nginx netperf
131072: 102 MB/s 112 MB/s 941.11 Mb/s
65536: 102 MB/s 112 MB/s 935.97 Mb/s
32768: 101 MB/s 105 MB/s 940.49 Mb/s
16384: 94 MB/s 90 MB/s 770.07 Mb/s
8192: 83 MB/s 66 MB/s 556.79 Mb/s
On the RN102, this time for apache and nginx, the file is served from
disks (ext4/lvm/raid1):
Apache nginx netperf
131072: 66 MB/s 105 MB/s 925.63 Mb/s
65536: 59 MB/s 105 MB/s 862.55 Mb/s
32768: 62 MB/s 105 MB/s 918.99 Mb/s
16384: 65 MB/s 105 MB/s 927.71 Mb/s
8192: 60 MB/s 104 MB/s 915.63 Mb/s
Values above are for a single flow though.
Cheers,
a+
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