[openib-general] why sdp connections cost so much memory

[Michael S. Tsirkin]

Quoting r. zhu shi song <zhushisongzhu at yahoo.com>:
> --- "Michael S. Tsirkin" <mst at mellanox.co.il> wrote:
> 
> > > > Quoting r. zhu shi song
> > <zhushisongzhu at yahoo.com>:
> > > > > (2) memory consumed by SDP connection is ok
> > > > >     But ab always only complete 256 requests
> > > > >     successfully.  Results are showed as
> > following:
> > > > >     # SIMPLE_LIBSDP=1
> > > > >     LD_PRELOAD=/usr/local/ofed/lib64/libsdp.so
> > ab -c 300
> > > > >     -n 300 -X 193.12.10.14:3129
> > > > >
> > > >
> > >
> >
> http://http://www.sse.com.cn/sseportal/ps/zhs/home.shtml
> > > > >    # This is ApacheBench, Version 2.0.41-dev
> > > > > <$Revision: 1.141 $> apache-2.0
> > > > > Copyright (c) 1996 Adam Twiss, Zeus Technology
> > > > Ltd,
> > > > > http://www.zeustech.net/
> > > > > Copyright (c) 1998-2002 The Apache Software
> > > > > Foundation, http://www.apache.org/
> > > > > 
> > > > > Benchmarking www.sse.com.cn [through
> > > > > 193.12.10.14:3129] (be patient)
> > > > > Completed 100 requests
> > > > > Completed 200 requests
> > > > > apr_recv: Connection refused (111)
> > > > > Total of 256 requests completed
> > > > 
> > > > Hmm. This one looks quite weird. Could you
> > please
> > > > enable debug
> > > > (run with debug_level=1) on the server side, and
> > > > post the messsages
> > > > you get in dmesg?
> > > 
> > > Quoting zhu shi song <zhushisongzhu at yahoo.com>:
> > > 
> > > is "debug_level=1" for squid or for sdp? 
> > > 
> > > zhu
> > 
> > That's for SDP.
>
> 
> I see many lines scrolling the screen quickly. there
> are many lines as below:
> 
> sdp_sock(3129:0):sdp_accept state 10 expected 10 *err
> -22
> sdp_accept:ib_req_notify_cq
> sdp_accept:status -22 sk 0000010034298100 newsk
> 00000xxxxx(changeable)
> sdp_accept:state 10 exptected 10 *err -22
> sdp_accept:error -11
> sdp_accept:status -11 sk 000001003429800 new sk
> 00000000000000

No, these are benign. This is server timing out waiting
for connection request.

I'm interested in sdp_cma_ messages - conn/disconnect requests
being handled.

-- 
MST