Hello,
I am trying to get the max bw for shared memory communications using
osu_[bw,bibw,mbw_mr] benchmarks.
I am observing a peak at ~64k/128K msg size and then drops instead of
sustaining it.
What parameters or linux config do I need to add to default openmpi settings
to get this improved ?
I am
ss placement and the size of the different cache levels. In your
> particular case I guess after 128k you are outside the L2 cache (1/2 of the
> cache in fact) and the bandwidth will drop as the data need to be flushed
> to main memory.
>
> George.
>
>
>
> On Fri, Mar
.
Thanks,
Joshua
-- Original Message --
Received: 03:06 PM CDT, 03/17/2017
From: George Bosilca
To: Joshua Mora
Cc: Open MPI Users
Subject: Re: [OMPI users] tuning sm/vader for large messages
> On Fri, Mar 17, 2017 at 3:33 PM, Joshua Mora wrote:
>
> > Thanks f
osilca
To: Joshua Mora Cc:
Open MPI Users
Subject: Re: [OMPI users] tuning sm/vader for large messages
> On Mon, Mar 20, 2017 at 12:45 PM, Joshua Mora wrote:
>
> > If at certain x msg size you achieve X performance (MB/s) and at 2x msg
> > size
> > or higher
Diego.
Assuming you are not properly coding the solver.
Write a problem so you know the exact solution.
That is know A (a very simple non singular SDP) and x_ , where x_ !=0. Make x
a linear function or a constant so it is super easy to spot where it is
happening the bad x's.
I assume A has the bou
