Hee Il
This looks disconcerting. Using vectorization or not should only affect things at the round-off level (the same way parallelization does).
The vectorization settings you show look good.
I'd like to dig deeper.
- Is your source code public, or would you be willing to share it with a few developers? - Is your parameter file public, or would you be willing to share it with a few developers? - The first thing to do is probably to look at other, more fundamental variables (e.g. metric components) in 3d and see where they begin to differ. The hope is that they would begin to differ early during the run. Do you have such 3d output at the same time from both simulations? Or do you have 1d output e.g. along the x axis for some variables?
-erik
On Thu, Jul 8, 2021 at 9:01 AM Hee Il Kim heeilkim@gmail.com wrote:
Hi all,
While examining different results from my colleague's, I found the vectorization option could develop misleading results. I seldom use the vectorization option but in the configuration file but he mixed up with mine and others leaving:
VECTORISE = yes VECTORISE_ALIGNED_ARRAYS = no VECTORISE_INLINE = yes
in the config file. I found these are default config options in recent simfactory optionlists. Instead, I used to use AVX but always adding e.g., "-fp-model precise" for value safeness.
I attached two figures with the vectorization on/off. For the case of no vectorization, I tested it w/wo AVX and got the identical result.
Hee Il
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