[openib-general] Re: SDP Performance

[Grant Grundler]

On Mon, Apr 11, 2005 at 12:00:14PM -0700, Libor Michalek wrote:
> > 2. Also, is there a program you use to measure SDP latency ?
> 
>   I've used netperf in the past which has a roundtrip test to
> measure latency using the regular sockets API. I don't have an
> AIO latency test handy at the moment, but I could fix one up
> and place it in the examples directory...

netperf -t TCP_RR is really easy to run. I suggest the 2.4.0-rc1
version *experimental* version from www.netperf.org.
2.4.0-rc1 is much more linux friendly than previous versions.
Just do "make config && make install"

You *must* use "-T" option (bind apps to the CPU handling interrupts)
for performance characterization.

I've run this alot for gige but not ran a full set for ia64/IB.
Output sample for IPoIB on HP/ZX1 ia64 (rx2600) below. I expect SDP
to be a bit better and would like to generate full sets for both
IPoIB and SDP this week.

ISTR netpipe also has latency tests but I've not played with netpipe yet.

grant


# /usr/local/bin/netperf -c -C -l 60 -H 10.0.0.30 -t TCP_RR -T 0,0
TCP REQUEST/RESPONSE TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 10.0.0.30 (10.0.0.30) port 0 AF_INET
Local /Remote
Socket Size   Request Resp.  Elapsed Trans.   CPU    CPU    S.dem   S.dem
Send   Recv   Size    Size   Time    Rate     local  remote local   remote
bytes  bytes  bytes   bytes  secs.   per sec  % S    % S    us/Tr   us/Tr

16384  87380  1       1      60.00   16313.15  5.85   5.98   7.174   7.326 
16384  87380