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From Intel's perspective, I doubt that's true, when taking into consideration the constant stream of side channel vulnerabilities they were needing to deal with
by dralley 2y ago
From Intel's perspective, I doubt that's true, when taking into consideration the constant stream of side channel vulnerabilities they were needing to deal with.
- Symmetry 2y agoIt's exactly the potential for side channel vulnerabilities that makes SMT so hard to get right.
- rbanffy 2y agoYou can always do like Sun and IBM and dilute the side channel in too many other threads to make it reliable. IIRC, both POWER10 and SPARC do 8 threads per core.
- Symmetry 2y agoIt's also a matter of workload. For a database where threads are often waiting on trips to RAM then SMT can provide a very large boost to performance.