Posts by Crystal Pellet
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1) Message boards : Number crunching : Optimization (Message 829)
Posted 27 Jan 2017 by Crystal Pellet
I have uploaded new versions of AVX and AVX2 apps for Linux and Windows, feel free to download and run them.

Because your Windows avx version of 23rd of January was a bit slower than the sse2, I tried your newer avx version from yesterday.

Average numbers of 8 tasks concurrently running on my i7 2600:

elapsed 1:15:39 - cpu 1:14:34 efficiency 98,579% -- sse2
elapsed 1:13:29 - cpu 1:12:53 efficiency 99,186% -- avx
2) Message boards : Number crunching : Optimization (Message 802)
Posted 24 Jan 2017 by Crystal Pellet
I could test it on SandyBridge CPUs only which have slow AVX division and square roots, so AVX app was slower there too. On newer CPUs with faster AVX and memory things may work differently and AVX/FMA versions may be faster. Will see, I hope people will post their results for new apps here.

SandyBridge i2600 with the slow avx running 8 threads (hyperthread on). The SSE2-application (v1.1) is a bit faster.

I tested under the same conditions with 4 tasks simultaniously (on the other 4 threads 1 LHC-VM and 3 WCG-Beta's).
Average of cpu-hours of the avx-application 1.22 hours
Average of cpu-hours of the sse2-application 1.19 hours




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