[openib-general] Re: ip over ib throughtput

[Michael S. Tsirkin]

Quoting r. Hassan M. Jafri <hjafri at ncsa.uiuc.edu>:
> Subject: Re: ip over ib throughtput
> 
> I cant crank out more than 150 MB/sec with my 2.0 GHz xeons. verbs level 
> benchmarks, however give decent numbers for bandwidth. With netperf, the 
> server side CPU usage is 99% which is much higher than other posted 
> bandwidth results on this thread. Any suggestions?
> 
> Here is the complete configuration for my bandwidth tests
> 
> Kernel-2.6.15.4
> netperf-2.3-3
> OpenIB rev 6552
> MTLP23108-CF128
> Firmware 3.4.0
> MSI-X is enabled for the HCA

Then something in TCP/IP stack configuration is consuming extra CPU cycles.
Could be e.g. you have some kind of packet filtering installed?

-- 
MST