Major performance hit with ToS setting
Andrew Gallatin
gallatin at cs.duke.edu
Fri May 25 13:31:45 UTC 2012
On 05/24/12 18:55, Kevin Oberman wrote:
>
> This is,of course, on a 10G interface. On 7.3 there is little
Hi Kevin,
What you're seeing looks almost like a checksum is bad, or
there is some other packet damage. Do you see any
error counters increasing if you run netstat -s before
and after the test & compare the results?
Thinking that, perhaps, this was a bug in my mxge(4), I attempted
to reproduce it this morning between 8.3 and 9.0 boxes and
failed to see the bad behavior..
% nuttcp-6.1.2 -c32t -t diablo1-m < /dev/zero
9161.7500 MB / 10.21 sec = 7526.5792 Mbps 53 %TX 97 %RX 0
host-retrans 0.11 msRTT
% nuttcp-6.1.2 -t diablo1-m < /dev/zero
9140.6180 MB / 10.21 sec = 7509.8270 Mbps 53 %TX 97 %RX 0
host-retrans 0.11 msRTT
However, I don't have any 8.2-r box handy, so I cannot
exactly repro your experiment...
Drew
More information about the freebsd-net
mailing list