Re: [LKP] Re: [hugetlbfs] c0d0381ade: vm-scalability.throughput -33.4% regression

[Xing Zhengjun]

Hi Mike,

   I re-test it in v5.9-rc8, the regression still existed. It is almost 
the same as 34ae204f1851. Do you have time to look at it? Thanks.

=========================================================================================
tbox_group/testcase/rootfs/kconfig/compiler/runtime/size/test/cpufreq_governor/ucode:

lkp-knm01/vm-scalability/debian-x86_64-20191114.cgz/x86_64-rhel-7.6/gcc-7/300s/8T/anon-cow-seq-hugetlb/performance/0x11

commit:
  49aef7175cc6eb703a9280a7b830e675fe8f2704
  c0d0381ade79885c04a04c303284b040616b116e
  v5.8
  34ae204f18519f0920bd50a644abd6fefc8dbfcf
  v5.9-rc1
  v5.9-rc8

49aef7175cc6eb70 c0d0381ade79885c04a04c30328                        v5.8 
34ae204f18519f0920bd50a644a                    v5.9-rc1 
  v5.9-rc8
---------------- --------------------------- --------------------------- 
--------------------------- --------------------------- 
---------------------------
         %stddev     %change         %stddev     %change 
%stddev     %change         %stddev     %change         %stddev 
%change         %stddev
             \          |                \          |                \ 
        |                \          |                \          | 
         \
     38043 ±  3%     -30.2%      26560 ±  4%     -29.5%      26815 ± 
6%      -7.4%      35209 ±  2%      -7.4%      35244            -8.8% 
  34704        vm-scalability.median
      7.86 ± 19%      +9.7       17.54 ± 21%     +10.4       18.23 ± 
34%      -3.1        4.75 ±  7%      -4.5        3.36 ±  7%      -4.0 
    3.82 ± 15%  vm-scalability.median_stddev%
  12822071 ±  3%     -34.1%    8450822 ±  4%     -33.6%    8517252 ± 
6%     -10.7%   11453675 ±  2%     -10.2%   11513595 ±  2%     -11.6% 
11331657        vm-scalability.throughput
 2.523e+09 ±  3%     -20.7%  2.001e+09 ±  5%     -19.9%  2.021e+09 ± 
7%      +6.8%  2.694e+09 ±  2%      +7.3%  2.707e+09 ±  2%      +5.4% 
2.661e+09        vm-scalability.workload


On 8/22/2020 7:36 AM, Mike Kravetz wrote:
> On 8/21/20 2:02 PM, Mike Kravetz wrote:
> > Would you be willing to test this series on top of 34ae204f1851?  I will need
> > to rebase the series to take the changes made by 34ae204f1851 into account.
>
> Actually, the series in this thread will apply/run cleanly on top of
> 34ae204f1851.  No need to rebase or port.  If we decide to move forward more
> work is required.  See a few FIXME's in the patches.

--
Zhengjun Xing