[Mvapich-discuss] Azure HBv4 mpi failure

[Paniraja Guptha, Akshay]

Hi Nicky,
    Thanks for bringing this to our attention. We will take a look at the issue and get back to you.

-Akshay Paniraja Guptha

From: Mvapich-discuss <mvapich-discuss-bounces+panirajaguptha.1=osu.edu at lists.osu.edu> On Behalf Of Sandhu, Prabhjot(Nicky)@DWR via Mvapich-discuss
Sent: Monday, July 1, 2024 11:09 AM
To: mvapich-discuss at lists.osu.edu
Subject: [Mvapich-discuss] Azure HBv4 mpi failure

I compiled my code against the lastest alma linux 8. 7 and mvapich2-2. 3. 7-1 on Azure. The code performs very well when using HBv2-series or HBv3-series, however it fails when using HBv4-series with the following warning at start of the mpirun
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I compiled my code against the lastest alma linux 8.7 and mvapich2-2.3.7-1 on Azure. The code performs very well when using HBv2-series<https://urldefense.com/v3/__https:/learn.microsoft.com/en-us/azure/virtual-machines/sizes/high-performance-compute/hb-family*hbv2-series__;Iw!!KGKeukY!wHkEMZ0eG8-_lzRbW3pQoiNeTm2zvI6k4mCGcQ5RhL_zSzxaLb28swQvFn_sXZm35ID-u19N9dXDw0rWbGB0sUpj2J05VChdBNmn6MzFmg$> or HBv3-series<https://urldefense.com/v3/__https:/learn.microsoft.com/en-us/azure/virtual-machines/sizes/high-performance-compute/hb-family*hbv3-series__;Iw!!KGKeukY!wHkEMZ0eG8-_lzRbW3pQoiNeTm2zvI6k4mCGcQ5RhL_zSzxaLb28swQvFn_sXZm35ID-u19N9dXDw0rWbGB0sUpj2J05VChdBNl1qZThrw$>, however it fails when using HBv4-series<https://urldefense.com/v3/__https:/learn.microsoft.com/en-us/azure/virtual-machines/sizes/high-performance-compute/hb-family*hbv4-series__;Iw!!KGKeukY!wHkEMZ0eG8-_lzRbW3pQoiNeTm2zvI6k4mCGcQ5RhL_zSzxaLb28swQvFn_sXZm35ID-u19N9dXDw0rWbGB0sUpj2J05VChdBNmJDg7Qiw$> with the following warning at start of the mpirun after which the application code also fails.

[get_link_speed] Invalid link speed 128


Has anyone seen this message? Are there any env vars or config vars to be set?


Nicky

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