From: Matt Thompson
Sent: Tuesday, February 25, 2020 5:54 AM
To: Adam Simpson
Cc: Open MPI Users
Subject: Re: [OMPI users] Help with One-Sided Communication: Works in Intel
MPI, Fails in Open MPI
External email: Use caution opening links or attachments
Adam,
A couple questions. First, is seccomp
---
> *From:* users on behalf of Matt
> Thompson via users
> *Sent:* Monday, February 24, 2020 5:15 PM
> *To:* Open MPI Users
> *Cc:* Matt Thompson
> *Subject:* Re: [OMPI users] Help with One-Sided Communication: Works in
> Intel MPI, Fails in Open MPI
>
&g
with "sysctl -w
kernel.yama.ptrace_scope=0".
Adam
From: users on behalf of Matt Thompson via
users
Sent: Monday, February 24, 2020 5:15 PM
To: Open MPI Users
Cc: Matt Thompson
Subject: Re: [OMPI users] Help with One-Sided Communication: Works in Int
Nathan,
The reproducer would be that code that's on the Intel website. That is what
I was running. You could pull my image if you like but...since you are the
genius:
[root@adac3ce0cf32 ~]# mpirun --mca btl_vader_single_copy_mechanism none
-np 2 ./a.out
Rank 0 running on adac3ce0cf32
Rank 1
On Mon, Feb 24, 2020 at 4:57 PM Gabriel, Edgar
wrote:
> I am not an expert for the one-sided code in Open MPI, I wanted to comment
> briefly on the potential MPI -IO related item. As far as I can see, the
> error message
>
>
>
> “Read -1, expected 48, errno = 1”
>
> does not stem from MPI I/O,
The error is from btl/vader. CMA is not functioning as expected. It might work
if you set btl_vader_single_copy_mechanism=none
Performance will suffer though. It would be worth understanding with
process_readv is failing.
Can you send a simple reproducer?
-Nathan
> On Feb 24, 2020, at 2:59
I am not an expert for the one-sided code in Open MPI, I wanted to comment
briefly on the potential MPI -IO related item. As far as I can see, the error
message
“Read -1, expected 48, errno = 1”
does not stem from MPI I/O, at least not from the ompio library. What file
system did you use for
