Re:Intel vulnerabilities costing 25% CPU performance loss to...
by kllrnohj on Friday May 17, 2019 @07:58PM
(#19944701)
Nonsense. Epyc's memory latency is only slightly behind Intel's, and every test other than MySQL shows neck & neck IPC across dozens of real-world programs that definitely don't fit in L1.
POV-Ray doesn't fit in L1 and Epyc 7601 trivially bests the Xeon 8176, and does so while using a ton less power. Similarly NAMD, even with AVX & compiled with Intel's ICC, runs waaaay faster on Epyc 7601 than it does on Xeon 8176.
Maybe your workload is exclusively MySQL or looks a lot like it. If so, sure, go buy Intel. But there's a ton of cases where there is no where close to such a gap, including large cloud workloads. You keep taking a single benchmark result and massively over-extrapolating it to mean the entire cloud hosting world. That's not how this works.
POV-Ray doesn't fit in L1 and Epyc 7601 trivially bests the Xeon 8176, and does so while using a ton less power. Similarly NAMD, even with AVX & compiled with Intel's ICC, runs waaaay faster on Epyc 7601 than it does on Xeon 8176.
Maybe your workload is exclusively MySQL or looks a lot like it. If so, sure, go buy Intel. But there's a ton of cases where there is no where close to such a gap, including large cloud workloads. You keep taking a single benchmark result and massively over-extrapolating it to mean the entire cloud hosting world. That's not how this works.