On Wed, 27 May 2020, Naveen Krishna Ch wrote: > I tried on an octa core machine, must be Renoir > vendor_id : AuthenticAMD > cpu family : 23 > model : 96 Yes, same here. The only difference I'm on a 6-core 4500U. > On an idle system over a period of 500secs: [snip] > Power consumed by socket: 4.53539685 W > Sum of power consumed by cores: 0.010953W Yes, no problem for idle readings. I'm getting 2W/package on AC and close to 0W on battery. > On an system with AVX test running over a period of 500 secs: > > At t=500sec | At t= 0 | Diff of energy > | in Joules | Power in Watts > core 0 | 649348495 | 413687530 | 235660965 | > 235.660965 | 0.47132193 > core 1 | 506880081 | 294882827 | 211997254 | > 211.997254 | 0.423994508 > core 2 | 454804046 | 271046127 | 183757919 | > 183.757919 | 0.367515838 > core 3 | 391508712 | 237531021 | 153977691 | > 153.977691 | 0.307955382 > core 4 | 410336868 | 284410079 | 125926789 | > 125.926789 | 0.251853578 > core 5 | 287569732 | 192306015 | 95263717 | > 95.263717 | 0.190527434 > core 6 | 185909622 | 120556152 | 65353470 | > 65.35347 | 0.13070694 > core 7 | 129932006 | 95385940 | 34546066 | > 34.546066 | 0.069092132 > Socket 0 | 28399099655 | 24799819931 3599279724 | 3599.27972 | > 7.198559448 > Power consumed by socket: 7.198559448 W > Sum of power consumed by cores: 2.212968 W > > Can you confirm this. No, this isn't right. The workload is not stressing all cores, you're reporting 235 J for core 0 and only 35 J for core 7. If you are running the avx-turbo test, please run it like this: ./avx-turbo --iters 10000000 --spec avx256_fma_t/8 This will run AVX code on all 8 cores for about 1 second. To run it for longer, increase the --iters argument. Thanks. Alexander
