0 Replies Latest reply on Feb 13, 2018 1:49 PM by bomby

    Ryzen Performance Monitor Counters: Not counting most x87/FP instructions?

    bomby

      I'm trying to use the PMC on my Ryzen 1800X (Microcode Update Revision 08001129h) to count x87/FP instructions, and somehow it doesn't seem to count most x87 instructions, neither with PMCx002, nor with PMCx0CB (both set to x87 only). All other PMCs I tried so far do seem to work like they should (AVX/SSE/MMX/Branch, etc.). The x87/FP instructions do seem to be included in PMCx0C0 and PMCx0C1 though. Is this a bug, or am I doing something wrong?

       

      Also: Why are there no PMC for AGU/ALU instructions? Or are they just missing from the "PPR for AMD Family 17h Model 01h B1"?