Re: [PATCH v9 07/20] mm/lru: introduce TestClearPageLRU

Alex Shi
2020-03-04T09:37:31Z

在 2020/3/4 下午5:03, Rong Chen 写道:
>> Hi Andrew,
>>
>> Thanks a lot for comments!
>> Yes, this patch is essential for all next.
>>
>> Consider the normal memory testing would focus on user page, that probabably with PageLRU.
>>
>> Fengguang's vm-scalibicase-small-allocs which used a lots vm_area_struct slab, which may
>> got some impact. 0day/Cheng Rong is working on the test. In my roughly testing, it may drop 5% on my
>> 96threads/394GB machine.
>>
>> Thanks
>> Alex
> Hi,
>
> We only tested one case and found a slight regression of vm-scalability.median from this patch set:
>
> Test case: small allocs
> =========================================================================================
> compiler/cpufreq_governor/kconfig/rootfs/runtime/tbox_group/test/testcase/ucode:
> gcc-7/performance/x86_64-rhel-7.6/debian-x86_64-20191114.cgz/300s/lkp-ivb-d02/small-allocs/vm-scalability/0x21

It's a very acceptable result!

Thanks a lot for so quick testing! I believe your results would be far more stable than me. :)

(My testing show quit different result in 2 reboot(1.3% or 6.6% drop). Maybe sth wrong for me in this case.)

Thanks for your report!
Alex