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Subject: Re: [OMPI devel] [BUG?] OpenMPI with openib on SPARC64: Signal: Bus error (10)
From: Lukas Razik (linux_at_[hidden])
Date: 2011-11-23 09:57:17


TERRY DONTJE <terry.dontje_at_[hidden]> wrote:
> On 11/22/2011 6:59 PM, Lukas Razik wrote:
>> Roland Dreier<roland_at_[hidden]>  wrote:
>>
>>> On Tue, Nov 22, 2011 at 3:05 PM, Lukas Razik<linux_at_[hidden]>
> wrote:
>>>>   #0  0xfffff8010229ba9c in mca_pml_ob1_send_request_start_copy
>>> (sendreq=0xb23200, bml_btl=0xb29050, size=0) at pml_ob1_sendreq.c:551
>>>>   551        hdr->hdr_match.hdr_ctx =
>>> sendreq->req_send.req_base.req_comm->c_contextid;
>>>>   (gdb) backtrace
>>> If you can get into gdb here, I guess it would be useful to print the
>>> address of hdr->hdr_match.hdr_ctx and
>>> sendreq->req_send.req_base.req_comm->c_contextid to see which one
> is
>>> misaligned.
>>>
>>> Not sure of the gdb syntax... does it work to just do
>>>
>>> p&hdr->hdr_match.hdr_ctx and sendreq->req_send.req_base.req
>>> p&sendreq->req_send.req_base.req_comm->c_contextid
>>>
>> Oh, sorry that I didn't do that before...
>> The values are:
>> &hdr->hdr_match.hdr_ctx and sendreq->req_send.req_base.req  =
> (uint16_t *) 0xad7393
>> &sendreq->req_send.req_base.req_comm->c_contextid  =  (uint32_t
> *) 0x201c20
>>
>> So hdr_ctx is the bad one...
>>
>>
>> PS:
>> I always don't know the syntax of gdb - hence I use the nice kdbg. *g*
>> http://net.razik.de/linux/T5120/kdbg-openmpi-1.4.4-osu_latency-02.png
> Can you get me the value of hdr too.  I bet it is an odd value too.

You're right! :)
The value of hdr you can see in the first screenshot I've sent sent you:
http://net.razik.de/linux/T5120/kdbg-openmpi-1.4.4-osu_latency.png

It's

hdr = (mca_pml_ob1_hdr_t*) 0xad7391

Regards,
Lukas