[openib-general] [PATCH] librdmacm/examples/rping.c

[Steve Wise]

On Fri, 2006-06-16 at 13:40 -0400, amith rajith mamidala wrote:
> Hi,
> 
> I tried using gdb but it also hangs at the end. The system used is a IA32
> platform using Red Hat Enterprise Linux AS release 4 (Nahant Update 3).
> kernel info:Linux k63-oib 2.6.16.20 #2 SMP Wed Jun 14 15:02:47 EDT 2006
> i686 i686 i386 GNU/Linux,
> 

Try breaking in rdma_destroy_id() and see if it ever returns from that
function...

STevo.

> Thanks,
> Amith
> 
> 
> On Fri, 16 Jun 2006, Steve Wise wrote:
> 
> > On Fri, 2006-06-16 at 11:20 -0400, amith rajith mamidala wrote:
> > > Hi Steve,
> > >
> > > The rping also doesn't exit after printing these error messages. Is this
> > > expected?
> > >
> >
> > It should exit!  :-(
> >
> > Maybe rping is not acking all the CM or Async events?  Or we've got a
> > bug in our refcnts on the iw_cm_ids in the kernel.  Can you get a gdb
> > stack trace when its stalled?   And if you kdb, a kernel mode stack
> > trace of the same thread would be nice too...
> >
> > What systems/distros/etc are you running this on?
> >
> > Thanks,
> >
> > Stevo.
> >
> >
> >
> > > Thanks,
> > > Amith
> > >
> > > On Thu, 15 Jun 2006, Steve Wise wrote:
> > >
> > > > This is the normal output for rping...
> > > >
> > > > The status error on the completion is 5 (FLUSHED), which is normal.
> > > >
> > > > Steve.
> > > >
> > > >
> > > > On Thu, 2006-06-15 at 17:24 -0400, amith rajith mamidala wrote:
> > > > > Hi,
> > > > >
> > > > > With the latest rping code (Revision: 8055) I am still able to see this
> > > > > race condition.
> > > > >
> > > > > server side:
> > > > >
> > > > > [@k62-oib examples]$ ./rping -s -vV -C10 -S26 -a 0.0.0.0 -p 9997
> > > > > server ping data: rdma-ping-0: ABCDEFGHIJKL
> > > > > server ping data: rdma-ping-1: BCDEFGHIJKLM
> > > > > server ping data: rdma-ping-2: CDEFGHIJKLMN
> > > > > server ping data: rdma-ping-3: DEFGHIJKLMNO
> > > > > server ping data: rdma-ping-4: EFGHIJKLMNOP
> > > > > server ping data: rdma-ping-5: FGHIJKLMNOPQ
> > > > > server ping data: rdma-ping-6: GHIJKLMNOPQR
> > > > > server ping data: rdma-ping-7: HIJKLMNOPQRS
> > > > > server ping data: rdma-ping-8: IJKLMNOPQRST
> > > > > server ping data: rdma-ping-9: JKLMNOPQRSTU
> > > > > server DISCONNECT EVENT...
> > > > > wait for RDMA_READ_ADV state 9
> > > > > cq completion failed status 5
> > > > >
> > > > > Client side:
> > > > >
> > > > > [@k63-oib examples]$ ./rping -c -vV -C10 -S26 -a 192.168.111.66 -p 9997
> > > > > ping data: rdma-ping-0: ABCDEFGHIJKL
> > > > > ping data: rdma-ping-1: BCDEFGHIJKLM
> > > > > ping data: rdma-ping-2: CDEFGHIJKLMN
> > > > > ping data: rdma-ping-3: DEFGHIJKLMNO
> > > > > ping data: rdma-ping-4: EFGHIJKLMNOP
> > > > > ping data: rdma-ping-5: FGHIJKLMNOPQ
> > > > > ping data: rdma-ping-6: GHIJKLMNOPQR
> > > > > ping data: rdma-ping-7: HIJKLMNOPQRS
> > > > > ping data: rdma-ping-8: IJKLMNOPQRST
> > > > > ping data: rdma-ping-9: JKLMNOPQRSTU
> > > > > cq completion failed status 5
> > > > > client DISCONNECT EVENT...
> > > > >
> > > > >
> > > > > Thanks,
> > > > > Amith
> > > > >
> > > > >
> > > > > On Tue, 13 Jun 2006, Steve Wise wrote:
> > > > >
> > > > > > Thanks, applied.
> > > > > >
> > > > > > iwarp branch: r7964
> > > > > > trunk: r7966
> > > > > >
> > > > > >
> > > > > > On Tue, 2006-06-13 at 11:24 -0500, Boyd R. Faulkner wrote:
> > > > > > > This patch resolves a race condition between the receipt of
> > > > > > > a connection established event and a receive completion from
> > > > > > > the client.  The server no longer goes to connected state but
> > > > > > > merely waits for the READ_ADV state to begin its looping.  This
> > > > > > > keeps the server from going back to CONNECTED from the later
> > > > > > > states if the connection established event comes in after the
> > > > > > > receive completion (i.e. the loop starts).
> > > > > > >
> > > > > > > Signed-off-by: Boyd Faulkner <faulkner at opengridcomputing.com>
> > > > > >
> > > > > >
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> >
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