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Subject: Re: [OMPI users] now 1.9 [was: I have still a problem with rankfiles in openmpi-1.6.4rc3]
From: Ralph Castain (rhc_at_[hidden])
Date: 2013-02-09 16:04:27

Let me take a look later today on my Linux box.

On Feb 9, 2013, at 10:42 AM, Eugene Loh <eugene.loh_at_[hidden]> wrote:

> On 02/09/13 00:32, Ralph Castain wrote:
>> On Feb 6, 2013, at 2:59 PM, Eugene Loh <eugene.loh_at_[hidden]> wrote:
>>> On 02/06/13 04:29, Siegmar Gross wrote:
>>>> thank you very much for your answer. I have compiled your program
>>>> and get different behaviours for openmpi-1.6.4rc3 and openmpi-1.9.
>>> I think what's happening is that although you specified "0:0" or "0:1" in the rankfile, the string "0,0" or "0,1" is getting passed in (at least in the runs I looked at). That colon became a comma. So, it's just by accident that myrankfile_0 is working out all right.
>>> Could someone who knows the code better than I do help me narrow this down? E.g., where is the rankfile parsed? For what it's worth, by the time mpirun reaches orte_odls_base_default_get_add_procs_data(), orte_job_data already contains the corrupted cpu_bitmap string.
>> You'll want to look at orte/mca/rmaps/rank_file/rmaps_rank_file.c - the bit map is now computed in mpirun and then sent to the daemons
> Actually, I'm getting lost in this code. Anyhow, I don't think the problem is related to Solaris. I think it's also on Linux. E.g., I can reproduce the problem with 1.9a1r28035 on Linux using GCC compilers.
> Siegmar: can you confirm this is a problem also on Linux? E.g., with OMPI 1.9, on one of your Linux nodes (linpc0?) try
> % cat myrankfile
> rank 0=linpc0 slot=0:1
> % mpirun --report-bindings --rankfile myrankfile numactl --show
> For me, the binding I get is not 0:1 but 0,1.
> Could someone else take a look at this?
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