[openib-general] [PATCH/RFC 1/2] IB: Return "maybe_missed_event" hint from ib_req_notify_cq()
xma at us.ibm.com
Fri Oct 20 10:02:54 PDT 2006
"Michael S. Tsirkin" <mst at mellanox.co.il> wrote on 10/19/2006 01:21:45 PM:
> Please also note that due to factors such as TCP window limits, TX on a
> socket is often stalled. To really stress a connection and see benefit
> NAPI you should be running multiple socket streams in parallel:
> either just run multiple instances of netperf/netserver, or use iperf
with -P flag.
I used to get 7600Mb/s IPoIB one socket duplex throughput with my other
IPoIB patches on 2.6.5 kernel under certain configuration. Which makes me
believe we could gain close to link throughput with one UD QP. Now I
couldn't get it anymore on the new kernel. I was struggling with TCP window
limits on the new kernel. Do you have any hint?
IBM Linux Technology Center
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