AMD Ryzen Threadripper 2990WX performance can see up-to 2X Boost with CorePrio tool
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schmidtbag
Astyanax
When Threadripper launched, I saw on friends machines that load balancing was not respecting CCX package barriers, I concluded that tagging was not working properly at that point.
Threadripper 2 comes along and I said "this is going to hurt", microsoft still hadn't corrected the tagging, so load balancing behaviors will juggle threads that should remain on one package between 2 or more.
The result?, Cache invalidation and branch misprediction penalties, when a task was moved from one package to another everything had to drop back to the uops cache and the high utilisation as has been seen was processing being done all over again.
non-localised memory on the detached CCX's are not the issue. See above.
N0Name
HARDRESET
Dazzzzm8
JamesSneed
https://www.phoronix.com/scan.php?page=article&item=2990wx-linwin-scale&num=4
Yeah I replied back to him on it as well. It appears this may be a big find I hope it gathers a ton of attention to force Microsoft to update its kernel as this could be huge for data centers especially as EPYC on Zen 2 lands later this year.
Michael Larabe had already shared Windows server 2019 results and it does appear to have the same issue. Once the threads are over 32 you can clearly see performance degrades in Windows compared to Linux. He didn't try to figure out why just published test results.
Fox2232
Reddoguk
Core Prio should have been done by AMD themselves, not the program but on the actual chip or firmware/drivers.
Fox2232
justdoge
It was known windows scheduler has serious issues few days after 1st gen ryzen launch. then AMD mysteriously stated they are sure everything with windows is fine. it was sketchy af imo and now it doubled
yourusernameyour
Denial
Maybe after they fix this Microsoft can support nested virtualization on AMD processors like everyone else does..
Seems like they are intentionally being obtuse about issues on AMD.
chispy
Absolutely a great youtube to watch , thanks for sharing.
sKutDeath
Doubled my 2970WX performance with the Indigo Benchmark as indicated, and other gaming Benchmarks as well; (3DMark, Unigine Superposition, etc...).
Yakk
IMO this will get "fixed" in windows when Intel releases their 28 core CPU.
WareTernal
IMO this is AMD racing to bring something sensational to market before it actually was ready. This isn't MS's fault, and this "fix" is lacking...
The Xeon 8180 is released, and it actually works. Intel worked with Microsoft BEFORE the release to ensure that it actually functions as intended...
Phoronix showed yesterday that Coreprio reduced performance in various loads. It can hurt as much as it helps depending on the load. Server 2019 performed very differently than Windows 10 in some of Michael's tests. Indigo does even worse on Server 2019 than on Windows 10, while in other benchmarks Server 2019 beats Windows 10, with or without CorePrio.