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Forum: Hardware January 28, 2018, 14:13
Replies: 30
Views: 7,467
Posted By flotus1
I am pretty sure poor scaling here is particular...

I am pretty sure poor scaling here is particular to this example. As stated earlier, there is quite some I/O overhead, load balancing might be far from ideal due to my non-existent OpenFOAM...
Forum: Hardware January 27, 2018, 09:18
Replies: 30
Views: 7,467
Posted By flotus1
All right, a fresh start with 6 threads: no...

All right, a fresh start with 6 threads:

no core binding: 153s
binding to the first 6 cores of one CPU: 196s
distributing across one CPU (2+2+1+1 threads per NUMA node): 166s
distributing...
Forum: Hardware January 26, 2018, 17:10
Replies: 30
Views: 7,467
Posted By flotus1
OK thanks, maybe I got it right. On 32 threads...

OK thanks, maybe I got it right.
On 32 threads simpleFoam takes 74s
With bind-to core: 71s
With bind-to hwthread: 71s

A large portion of the time seems to be I/O. Load balancing might be far...
Forum: Hardware January 26, 2018, 11:32
Replies: 30
Views: 7,467
Posted By flotus1
I heard you. What I did so far was installing the...

I heard you. What I did so far was installing the latest OpenFOAM docker image and copying the motorbike files to a run directory. From here on I need specific instructions :confused:
Forum: Hardware October 25, 2017, 08:45
Replies: 30
Views: 7,467
Posted By flotus1
Biased in which sense? Higher communication...

Biased in which sense? Higher communication overhead due to a larger number of smaller domains? That is exactly why I always prefer a smaller number of faster cores over a larger number of slower...
Forum: Hardware October 25, 2017, 08:29
Replies: 30
Views: 7,467
Posted By flotus1
:confused::confused::confused: Because it still...

:confused::confused::confused:
Because it still has 4 cores left idling? That seems like quite a daring extrapolation. Go ahead and try it, you might be surprised. CFD performance usually does not...
Forum: Hardware October 25, 2017, 05:41
Replies: 30
Views: 7,467
Posted By flotus1
Thanks for sharing your results. However, I am...

Thanks for sharing your results.
However, I am not quite convinced by your metric. So far, the Intel chip (let alone the platform) costs less and is faster. I would be more interested in a...
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