Hi Alexander On Wed, 27 May 2020 at 22:29, Alexander Monakov <amonakov@xxxxxxxxx> wrote: > > 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. I ran with all cores loaded now and i see that sum of diff of energy consumed by all cores is greater than the diff of socket energy consumed in 100secs. Kindly, give me time. I will come back with some explanation or solution. > > Thanks. > Alexander -- Shine bright, (: Nav :)
