Messages in this thread |  | | Date | Fri, 23 Oct 2020 12:29:00 -0700 (PDT) | | From | David Rientjes <> | | Subject | Re: [mm/page_alloc] 7fef431be9: vm-scalability.throughput 87.8% improvement |
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On Wed, 21 Oct 2020, kernel test robot wrote:
> Greeting, > > FYI, we noticed a 87.8% improvement of vm-scalability.throughput due to commit: > > > commit: 7fef431be9c9ac255838a9578331567b9dba4477 ("mm/page_alloc: place pages to tail in __free_pages_core()") > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master > > > in testcase: vm-scalability > on test machine: 192 threads Intel(R) Xeon(R) Platinum 9242 CPU @ 2.30GHz with 192G memory > with following parameters: > > runtime: 300s > size: 512G > test: anon-wx-rand-mt > cpufreq_governor: performance > ucode: 0x5002f01 > > test-description: The motivation behind this suite is to exercise functions and regions of the mm/ of the Linux kernel which are of interest to us. > test-url: https://git.kernel.org/cgit/linux/kernel/git/wfg/vm-scalability.git/ >
I'm curious why we are not able to reproduce this improvement on Skylake and actually see a slight performance degradation, at least for 300s_128G_truncate_throughput.
Axel Rasmussen <axelrasmussen@google.com> can provide more details on our results.
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