Re: Re: Re: Re: Re: Re: limited network bandwidth with 3.2.x kernels

Neal Cardwell
2012-02-15T06:03:47Z

There are some potentially interesting differences in sysctl values:

> diff -u /tmp/sysctl-a-3.1.txt /tmp/sysctl-a-3.2.txt | grep mem_def
-net.core.wmem_default = 114688
-net.core.rmem_default = 114688
+net.core.wmem_default = 163840
+net.core.rmem_default = 163840

Can you please try running this as root on the 3.2 kernel and then see
what sort of performance you get:

sysctl net.core.rmem_default=114688

This should make the 3.2 config closer to the 3.1 config. Should be
interesting to see if the behavior is more similar when that happens.

neal