Hello Ralph and all
Please ignore this mail. It is indeed due to a syntax error in my code.
Sorry for the noise; I'll be more careful with my homework from now on.
Best regards
Durga
We learn from history that we never learn from history.
On Mon, May 23, 2016 at 2:13 AM, dpchoudh . <dpcho...@gmail.com> wrote:
> Hello Ralph
>
> Thanks for your input. The routine that does the send is this:
>
> static int btl_lf_modex_send(lfgroup lfgroup)
> {
> char *grp_name = lf_get_group_name(lfgroup, NULL, 0);
> btl_lf_modex_t lf_modex;
> int rc;
> strncpy(lf_modex.grp_name, grp_name, GRP_NAME_MAX_LEN);
> OPAL_MODEX_SEND(rc, OPAL_PMIX_GLOBAL,
> &mca_btl_lf_component.super.btl_version,
> (char *)&lf_modex, sizeof(lf_modex));
> return rc;
> }
>
> This routine is called from the component init routine
> (mca_btl_lf_component_init()). I have verified that the values in the modex
> (lf_modex) are correct.
>
> The receive happens in proc_create, and I call it like this:
> OPAL_MODEX_RECV(rc, &mca_btl_lf_component.super.btl_version,
> &opal_proc->proc_name, (uint8_t
> **)&module_proc->proc_modex, &size);
>
> In here, I get junk value in proc_modex. If I pass a buffer that was
> malloc()'ed in place of module_proc->proc_modex, I still get bad data.
>
>
> Thanks again for your help.
>
> Durga
>
> We learn from history that we never learn from history.
>
> On Sat, May 21, 2016 at 8:38 PM, Ralph Castain <r...@open-mpi.org> wrote:
>
>> Please provide the exact code used for both send/recv - you likely have
>> an error in the syntax
>>
>>
>> On May 20, 2016, at 9:36 PM, dpchoudh . <dpcho...@gmail.com> wrote:
>>
>> Hello all
>>
>> I have a naive question:
>>
>> My 'cluster' consists of two nodes, connected back to back with a
>> proprietary link as well as GbE (over a switch).
>> I am calling OPAL_MODEX_SEND() and the modex consists of just this:
>>
>> struct modex
>> {char name[20], unsigned mtu};
>>
>> The mtu field is not currently being used. I bzero() the struct and have
>> verified that the value being written to the 'name' field (this is similar
>> to a PKEY for infiniband; the driver will translate this to a unique
>> integer) is correct at the sending end.
>>
>> When I do a OPAL_MODEX_RECV(), the value is completely corrupted.
>> However, the size of the modex message is still correct (24 bytes)
>> What could I be doing wrong? (Both nodes are little endian x86_64
>> machines)
>>
>> Thanks in advance
>> Durga
>>
>> We learn from history that we never learn from history.
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>>
>>
>>
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>>
>
>
