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

[Michael S. Tsirkin]

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
> 


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-- 
MST