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Showing results 1 to 11 of 11 Search took 0.00 seconds. Search: Posts Made By: flotus1

Forum: Hardware January 5, 2018, 15:02

Replies: 22 Kernel for new CPUs Views: 5,071 Posted By flotus1 With N=100 on 32 cores: real 11m46.610s ... With N=100 on 32 cores: real 11m46.610s user 358m42.870s sys 15m52.321s

Forum: Hardware January 4, 2018, 09:51

Replies: 22 Kernel for new CPUs Views: 5,071 Posted By flotus1 My bad, I thought you were referring to parallel... My bad, I thought you were referring to parallel execution times compared to the Epyc setup.

Forum: Hardware January 4, 2018, 07:08

Replies: 22 Kernel for new CPUs Views: 5,071 Posted By flotus1 The system size here is 50x50x50? Then I would... The system size here is 50x50x50? Then I would expect the gap to become larger with increased problem size.

Forum: Hardware January 3, 2018, 14:00

Replies: 22 Kernel for new CPUs Views: 5,071 Posted By flotus1 I applied the changes to the source code as you... I applied the changes to the source code as you suggested. Output for dual AMD Epyc 7301: as01449@localhost:~/benchmarks/palabos-v2.0r0/examples/showCases/cavity3d> time mpirun -np 32 cavity3d...

Forum: Hardware December 14, 2017, 07:43

Replies: 22 Kernel for new CPUs Views: 5,071 Posted By flotus1 I don't think so, a memory bandwidth limit on a... I don't think so, a memory bandwidth limit on a single core would be rather unusual. Apart from that, your I9 CPU has more memory bandwidth available to a single core, AMD Epyc only has 2 memory...

Forum: Hardware December 14, 2017, 04:08

Replies: 22 Kernel for new CPUs Views: 5,071 Posted By flotus1 IIRC the 9.2 single-core were on CentOS 7 with... IIRC the 9.2 single-core were on CentOS 7 with Kernel version 4.14-3-1 Now with Tumbleweed (same Kernel) this slightly improved to 9.37.

Forum: Hardware December 13, 2017, 11:04

Replies: 22 Kernel for new CPUs Views: 5,071 Posted By flotus1 Weird. I suspect that something is still... Weird. I suspect that something is still bottlenecking your I9 CPU. Did you already try a clean install with a more recent Linux version? I am currently running Opensuse Tumbleweed on my AMD...

Forum: Hardware December 2, 2017, 11:37

Replies: 22 Kernel for new CPUs Views: 5,071 Posted By flotus1 Indeed :D Running the 100 benchmark size on all... Indeed :D Running the 100 benchmark size on all 32 cores I get 162 MLUPS.

Forum: Hardware December 2, 2017, 06:02

Replies: 22 Kernel for new CPUs Views: 5,071 Posted By flotus1 As I just found out myself while setting up my... As I just found out myself while setting up my new workstation: sudo turbostat shows the actual CPU frequency on linux. While "lscpu" and "cat /proc/cpuinfo | grep MHz" always worked fine for me on...

Forum: Hardware November 24, 2017, 08:08

Replies: 22 Kernel for new CPUs Views: 5,071 Posted By flotus1 Another reason to test a different OS. With... Another reason to test a different OS. With Opensuse and Mint (and Windows of course) I never had any issues with turbo not being used. Maybe an energy saving option in your OS? Maybe deactivated in...

Forum: Hardware November 23, 2017, 14:25

Replies: 22 Kernel for new CPUs Views: 5,071 Posted By flotus1 Seems like there is something wrong. My laptop... Seems like there is something wrong. My laptop processor (I5-4210U) is getting 7.3 MLUPS on one core. Did you recompile after the kernel update? Did you clear caches before running the benchmark?...

Showing results 1 to 11 of 11

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