4 ms·
The clock rate issue isn't the fact that it downclocks a core when moving to AVX512, it's that it downclocked all the other cores on the processor at the same t
by DuskStar 7y ago
The clock rate issue isn't the fact that it downclocks a core when moving to AVX512, it's that it downclocked all the other cores on the processor at the same time.
- robocat 7y agoFrom what I have read, AVX512 only affects the one core (downclocking License level L1 or L2), it is older CPUs with AVX2 that affected all cores. Independently thermal throttling can occur which would affect all cores, although presumably the CPU is generating heat per numeric operation, so AVX512 is neutral versus other instructions per numeric operation.
- gameswithgo 7y agoon intel cpus the license levels basically are discrete thermal throttles. vs and which doesn’t do that, just constantly monitors thermals and adjusts clock. intels method makes benchmarking simpler! but may leave performance on the table.
- gameswithgo 7y agoi understand why downclocks are an issue, and i understand that on some intel cpus the while chip downclocks with certain instructions. i was commenting on the supposed reason the down clocks happen, and mentioning that performance is spectacular despite then (assuming you schedule your workload appropriately).