Posts by koschi
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1) Message boards : Problems and bug reports : Could you compile an AVX2-128bit application for AMDs Ryzen? (Message 5264)
Posted 17 Mar 2017 by koschi
Btw, not exactly AVX related, but since we have everyone on board already.
The news on http://www.numberworld.org/y-cruncher/ says Ryzen can run FMA4, even though the FMA4 feature flag is not set. I tried to run www.boincunited.org/opt_apps/period_search_10210_x86_64-pc-linux-gnu__fma4.tar.bz2, but it failed within few seconds, SIGILL: illegal instruction.

Any other way to confirm this?

I've seen you using GCC earlier somewhere, can you give 6.3 a try, maybe with -march=znver1 and -O3?
Have you tried to build with Clang?
As per the Phoronix results, it can make a substantial difference in some apps.
http://www.phoronix.com/scan.php?page=article&item=gcc-clang-ryzen
2) Message boards : Problems and bug reports : Could you compile an AVX2-128bit application for AMDs Ryzen? (Message 5255)
Posted 15 Mar 2017 by koschi
AMD powered miracles, nothing less :-D
3) Message boards : Problems and bug reports : Could you compile an AVX2-128bit application for AMDs Ryzen? (Message 5248)
Posted 14 Mar 2017 by koschi
http://asteroidsathome.net/boinc/results.php?hostid=312297

Might have to wait for some more WUs to complete, but so far it doesn't seem like an improvement over SSE3.
4) Message boards : Problems and bug reports : Could you compile an AVX2-128bit application for AMDs Ryzen? (Message 5247)
Posted 14 Mar 2017 by koschi
Thanks! That one is working, WUs are running 2 minutes already, results in 2-3 hours...

Where is the difference, which flags did you use / skip in this one?
5) Message boards : Problems and bug reports : Could you compile an AVX2-128bit application for AMDs Ryzen? (Message 5238)
Posted 13 Mar 2017 by koschi
Thanks for the compile, unfortunately it seems not to work yet :-(

http://asteroidsathome.net/boinc/result.php?resultid=148531759

btw, the link works fine with wget or Chromium, no need for MS to be involved ;-)




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