Intel's “Cripple AMD” Function

Post by colejohnson66 » Fri, Dec 06, 2019, 1:50 AM UTC

skunkworker wrote: post #10

It's interesting how this is still a major issue today, Last month I learned about the Matlab AMD crippling issue. With the workaround AMD performance on a 3960x increased by 30%. "[...] the Intel MKL uses a discriminative CPU Dispatcher that does not use efficient codepath according to SIMD support by the CPU, but based on the result of a vendor string query. If the CPU is from AMD, the MKL does not use SSE3-SSE4 or…