Hi,
> On 28 Mar 2017, at 2:00 am, r...@open-mpi.org wrote:
> I’m confused - mpi_yield_when_idle=1 is precisely the “oversubscribed”
> setting. So why would you expect different results?
Ahh — I didn’t realise it auto-detected this. I recall working on a system in
the past where I needed to expl
On Sat, Mar 25, 2017 at 7:15 AM Jeff Squyres (jsquyres)
wrote:
> On Mar 25, 2017, at 3:04 AM, Ben Menadue wrote:
> >
> > I’m not sure about this. It was my understanding that HyperThreading is
> implemented as a second set of e.g. registers that share execution units.
> There’s no division of th
Dear rhc,
dear Reuti,
thanks for your valuable help!
Kind regards,
Ado Arnolds
On 22.03.2017 15:55, r...@open-mpi.org wrote:
> Sorry folks - for some reason (probably timing for getting 2.1.0 out), the
> fix for this got pushed to v2.1.1 - see the PR here:
> https://github.com/open-mpi/ompi/p
On Mar 27, 2017, at 11:00 AM, r...@open-mpi.org wrote:
>
> I’m confused - mpi_yield_when_idle=1 is precisely the “oversubscribed”
> setting. So why would you expect different results?
A few additional points to Ralph's question:
1. Recall that sched_yield() has effectively become a no-op in new
I was not expecting different results. I just wanted to respond to Ben's
suggestion, and demonstrate that the problem (the performance difference
between v.1.10.1 and v.1.10.2) is not caused by spin-waiting.
On 27/03/2017 17:00, r...@open-mpi.org wrote:
I’m confused - mpi_yield_when_idle=1 is p
I’m confused - mpi_yield_when_idle=1 is precisely the “oversubscribed” setting.
So why would you expect different results?
> On Mar 27, 2017, at 3:52 AM, Jordi Guitart wrote:
>
> Hi Ben,
>
> Thanks for your feedback. As described here
> (https://www.open-mpi.org/faq/?category=running#oversubs
Hi Ben,
Thanks for your feedback. As described here
(https://www.open-mpi.org/faq/?category=running#oversubscribing),
OpenMPI detects that I'm oversubscribing and runs in degraded mode
(yielding the processor). Anyway, I repeated the experiments setting
explicitly the yielding flag, and I obt
> "SJ" == Sylvain Jeaugey writes:
Hi Sylvain,
thanks for looking into this further.
SJ> I'm still working to get a clear confirmation of what is
SJ> printing this error message and since when.
SJ> However, running strings, I could only find this string in
SJ> /usr/lib/libnv
