Phil Miller - NOAA
Phil Miller - NOAA
These were both run on CUDA GPU with 1 grid covering the entire domain, so this isn't an issue related to `Redistribute()`
A note of discussion from @KZhu-ME and @peterscherpelz - the same anomaly appears for electron density as well, but to a lesser extent. The effect takes some time from the...
May be a consequence of `-ffast-math` on GPU
It looks like that changed the position of the spikes, though. What indices are those happening at? Can you see anything interesting about the output of my little analysis program...
Kevin told me that he did that run in a slightly lower-resolution domain, 1472^2, to get results a bit faster. The spikes consistently occur where the zero differences appear at...
Ok, now that #3397 has been addressed, I'm back to looking at this. Here's a more recent plot of the effect  That shows its absence in double precision, and...
Potentially superseded in part or in whole by #5706
To memorialize a bit of more recent chatter that I instigated, in investigating #5933, I found that icpc 19.0.5 running with `-O3` besides needing the referenced workaround to not hang...
4.0 released with this.
Please confirm that those occur even with a `-j1` build