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

[Michael S. Tsirkin]

I did - this is the spec bug we are discussing with Sean.

Quoting r. zhu shi song <zhushisongzhu at yahoo.com>:
> Subject: Re: why sdp connections cost so much memory
> 
> Have you resolved the problem?
> zhu
> 
> --- "Michael S. Tsirkin" <mst at mellanox.co.il> wrote:
> 
> > Yes, I have reproduced the connection refusal
> > problem and I am looking into it.
> > Thanks!
> > 
> > MST
> > 
> > Quoting r. zhu shi song <zhushisongzhu at yahoo.com>:
> > Subject: Re: why sdp connections cost so much memory
> > 
> > I haven't met kernel crashes using rc2.  But there
> > always occurred connection refusal when max
> > concurrent
> > connections set above 200. All is right when max
> > concurrent connections is set to below 200.  ( If
> > using TCP to take the same test, there is no
> > problem.)
> > (1)
> > This is ApacheBench, Version 2.0.41-dev <$Revision:
> > 1.141 $> apache-2.0
> > Copyright (c) 1996 Adam Twiss, Zeus Technology Ltd,
> > http://www.zeustech.net/
> > Copyright (c) 1998-2002 The Apache Software
> > Foundation, http://www.apache.org/
> > 
> > Benchmarking www.google.com [through
> > 193.12.10.14:3129] (be patient)
> > Completed 100 requests
> > Completed 200 requests
> > apr_recv: Connection refused (111)
> > Total of 257 requests completed
> > (2)
> > This is ApacheBench, Version 2.0.41-dev <$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.google.com [through
> > 193.12.10.14:3129] (be patient)
> > Completed 100 requests
> > Completed 200 requests
> > apr_recv: Connection refused (111)
> > Total of 256 requests completed
> > [root at IB-TEST squid.test]#
> > 
> > zhu
> > 
> > 
> > 
> > 
> > --- "Michael S. Tsirkin" <mst at mellanox.co.il> wrote:
> > 
> > > 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>:
> > > > > > (3) one time linux kernel on the client
> > > crashed. I
> > > > > > copy the output from the screen.
> > > > > > Process sdp (pid:4059, threadinfo
> > > 0000010036384000
> > > > > > task 000001003ea10030)
> > > > > > Call
> > > > > >
> > > > >
> > >
> > Trace:<ffffffffa0205011>{:ib_sdp:sdp_destroy_workto}
> > > > > > <ffffffffa02041ae>
> > {:ib_sdp:sdp_destroy_qp+77}
> > > > > >
> > > > >
> > > >
> > >
> >
> <ffffffffa02044da>{:ib_sdp:sdp_destruct+279}<ffffffff802a42d2>{sk_free+28}
> > > > > >
> > > > >
> > > >
> > >
> >
> <ffffffff80146e1e>{worker_thread+419}<ffffffff801333c8>{default_wake_function+0}
> > > > > >
> > > > >
> > > >
> > >
> >
> <ffffffff801333c8>{default_wake_function+0}<ffffffff8014aabc>{keventd_create_kthread+0}
> > > > > >
> > > > >
> > > >
> > >
> >
> <ffffffff80146c76>{worker_thread+0}<ffffffff8014aabc>{keventd_create_kthread+0}
> > > > > >
> > > > >
> > > >
> > >
> >
> <ffffffff8014aa93>{kthread+200}<ffffffff80110e17>{child_rip+8}
> > > > > >
> > > > >
> > > >
> > >
> >
> <ffffffff8014aabc>{keventd_create_kthread+0}<ffffffff8014a9cb>{kthread+0}<ffffffff80110e0f>{child_rip+0}
> > > > > > Code:8b 40 04 41 39 c6 89 44 24 0c 7d 3b 45
> > 31
> > > ff
> > > > > 45
> > > > > > 31 ed 4c 89
> > > > > >
> > > > >
> > > >
> > >
> >
> RIP:<ffffffffa0208437>{:ib_sdp:sdp_recv_completion+127}RSP<0000010036385dc8>
> > > > > > CR2:0000000000000004
> > > > > > <0>kernel panic-not syncing:Oops
> > > > > > 
> > > > > > zhu
> > > > > 
> > > > > Hmm, the stack dump does not match my sources.
> > > Is
> > > > > this OFED rc1?
> > > > > Could you send me the sdp_main.o and
> > sdp_main.c
> > > > > files from your system please?
> > > 
> > > ---
> > > 
> > > > Subject: Re: why sdp connections cost so much
> > > memory
> > > > 
> > > > please see the attachment.
> > > > zhu
> > > 
> > > Ugh, so its crashing inside sdp_bcopy ...
> > > 
> > > By the way, could you please re-test with OFED
> > rc2?
> > > We've solved a couple of bugs there ...
> > > 
> > > If this still crashes, could you please post the
> > > whole
> > > sdp directory, with .o and .c files?
> > > 
> > > Thanks,

-- 
MST