OpenMathLib / OpenMathLib/OpenBLAS
Test and tune for Zen 2
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- Dominant language
- C
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Description
Zen 2 is now released, bringing a number of improvements to the table.
Most notably, it now has 256 wide AVX units. This should in theory allow performance parity with Haswell-Coffee Lake CPUs, and initial results suggest this is true (at least for single thread).
https://i.imgur.com/sFhxPrW.png
The chips also have double the L3 cache, and a generally reworked cache hierarchy. One thing to note, is that these chips do not have enough TLB cache to cover all of L2 and L3, so hugepages might be a little more important.
I might be able to get my hands on a Zen 2 system in ~1-2 months.
Contributor guide
No contributing guide indexed for this repository
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reviewing the Zen 2 performance claims in the issue and compare them with results from a Zen 2 system, including the effects of its AVX units, cache hierarchy, and hugepages. Done means benchmark results identify any gaps and the relevant OpenBLAS tuning is adjusted or shown unnecessary.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- c
- Domain
- performance
- Issue type
- Refactor
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100