On 1/14/2021 11:18 AM, Roman Gushchin wrote:
On Thu, Jan 14, 2021 at 10:51:51AM +0800, kernel test robot wrote:
Greeting,

FYI, we noticed a -62.4% regression of hackbench.throughput due to commit:
Hi!

Commit "mm: memcg/slab: optimize objcg stock draining" (currently only in the mm tree,
so no stable hash) should improve the hackbench regression.
The commit has been merged into Linux mainline :
 3de7d4f25a7438f09fef4e71ef111f1805cd8e7c  ("mm: memcg/slab: optimize objcg stock draining")
I test the regression still existed.
=========================================================================================
tbox_group/testcase/rootfs/kconfig/compiler/nr_threads/iterations/mode/ipc/cpufreq_governor/ucode:
  lkp-csl-2sp7/hackbench/debian-10.4-x86_64-20200603.cgz/x86_64-rhel-8.3/gcc-9/100%/4/process/socket/performance/0x5003003

commit:
  286e04b8ed7a04279ae277f0f024430246ea5eec
  10befea91b61c4e2c2d1df06a2e978d182fcf792
  3de7d4f25a7438f09fef4e71ef111f1805cd8e7c
  v5.11-rc6

286e04b8ed7a0427 10befea91b61c4e2c2d1df06a2e 3de7d4f25a7438f09fef4e71ef1                   v5.11-rc6
---------------- --------------------------- --------------------------- ---------------------------
         %stddev     %change         %stddev     %change         %stddev     %change         %stddev
             \          |                \          |                \          |                \
    192062 ±  9%     -62.4%      72220 ± 16%     -63.0%      71147 ±  2%     -61.7%      73626        hackbench.throughput


Thanks!
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-- 
Zhengjun Xing