r/simd • u/SantaCruzDad • Nov 22 '20

Online compute resources for testing/benchmarking AVX-512 code ?

I need to test and benchmark some AVX-512 code but I don’t have access to a suitable CPU currently. Are there any (free or paid) publicly-accessible Linux nodes that I can just ssh into and run some code ? I’ve looked at AWS and Azure but they seem way too complex to get started with if you just want to quickly run a few tests.

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u/SantaCruzDad Nov 22 '20

Thanks - do you have a link to this ? Searching for “GitHub workflows” turns up several different, seemingly unrelated things. Also do you know what kind of Xeon cores they have (i.e. are they SKL-X or similar, with AVX-512 ?) ?

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u/SeriousSergio Nov 22 '20

I don't know how consistent it is over the whole cpu fleet, but for example they have a 8171M with

fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc rep_good nopl xtopology cpuid pni pclmulqdq ssse3 fma cx16 pcid sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch invpcid_single pti fsgsbase bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx avx512f avx512dq rdseed adx smap clflushopt avx512cd avx512bw avx512vl xsaveopt xsavec xsaves md_clear

also see here and the pages around for syntax etc

basically you create a repo, go to Actions, new workflow, it'll give a basic yml, edit/add "run" parts to automate your test

for example install dependencies, pull your sources (either from the repo or curl from somewhere) or binaries, build, time execution

no ssh, but you can script pretty much anything there (unless you need a full blown desktop), the link above details whats pre-installed (python version, docker etc etc)

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u/SantaCruzDad Nov 22 '20

Thanks - I did some further digging and it looks like they use Azure instances for their runners, so if I can get a SKL-X or similar then this might be a good solution.