Ryzen 1950x is very slow in TYFLOW

[A.kavyani]

Hi,
first of all thank's for your great work.

I tried Tyflow on my laptop with 7700 HQ cpu and speed was great but when i tried same scene on my computer ryzen 1950x 32gb ram corsair 3600 mhz speed was 4time slower than my 7700hq.

I turned of auto multi thread and selected 16thread of my cpu
result was faster than when I simulate with all of cpu threads.

does anyone have the same problem?

That sounds like a similar problem some people do have with PhoenixFD and Ryzen CPU`s. They have some problems with NUMA that slows down the calculation considerably. 

I run into a similar problem with my dual xeon workstation. When calculating lower resolution simulations, a single numa node (less threads) are faster than with both nodes. I think its because the communication between the two nodes takes longer than the actual calculation process.

Thank's Heerockss,
I compared a simple sim in phoenixFD
7700 HQ : 9m 40 s
1950x : 4m 28s
in this comparision 1950 is 2x faster than 7700HQ.
but in tyflow the result is opposite 7700 is 2x faster than 1950.
hope Tyson gives us information about this.