Similar issues can be very different in causes. Checking the referenced discussion, I wasn’t sure what was the original issues. We suggested to try ch4 as to get more data points rather than as a solution. Nevertheless, ch4 is the current recommended device as it is more actively developed.

Ch3 is not broken as far as we know. Could you describe your issue in more details?

-- 
Hui Zhou

From: Alim Akhtar via discuss <discuss@mpich.org>
Date: Wednesday, May 26, 2021 at 10:51 PM
To: discuss@mpich.org <discuss@mpich.org>
Cc: Alim Akhtar <alim.akhtar@gmail.com>
Subject: [mpich-discuss] mpich3 error with ch3

Hi mpich dev team,

I am facing one issue similar to discussed in below discussion

https://lists.mpich.org/pipermail/devel/2021-January/000826.html

Someone in the mailing list suggested recompiling the mpi bench using
CH4. as below:

https://lists.mpich.org/pipermail/devel/2021-January/000828.html

"MPICH with ch4, with `--with-device=ch4:ofi`"

Actually this fixes the failure on this CPU architecture.

Questions:
1. Is this a known issue with MPI bench on the recent CPU
architecture? (I am running on ARM's Cortex -A 75), like ch3 is
broken?
2. With no error after using CH4, does this mean the CPU is all good?

Note: using ch3 was working fine on our previous CPU (A-72)

Any input will be really appreciated.


--
Regards,
Alim
_______________________________________________
discuss mailing list     discuss@mpich.org
To manage subscription options or unsubscribe:
https://lists.mpich.org/mailman/listinfo/discuss