Greeting,

FYI, we noticed a -2.3% regression of unixbench.score due to commit:


commit: dcda20b3685f14d4d29d31592fe9898943fce1bb ("Fill in ELF image holes with PROT_NONE to prevent mapping to the hole")
url: https://github.com/0day-ci/linux/commits/blackzert-gmail-com/Fill-in-ELF-image-holes-with-PROT_NONE-to-prevent-mapping-to-the-hole/20170715-045829


in testcase: unixbench
on test machine: 12 threads Intel(R) Atom(R) CPU 3958 @ 2.00GHz with 64G memory
with following parameters:

	runtime: 300s
	nr_task: 1
	test: execl
	cpufreq_governor: performance

test-description: UnixBench is the original BYTE UNIX benchmark suite aims to test performance of Unix-like system.
test-url: https://github.com/kdlucas/byte-unixbench



Details are as below:
-------------------------------------------------------------------------------------------------->


To reproduce:

        git clone https://github.com/01org/lkp-tests.git
        cd lkp-tests
        bin/lkp install job.yaml  # job file is attached in this email
        bin/lkp run     job.yaml

testcase/path_params/tbox_group/run: unixbench/300s-1-execl-performance/lkp-denverton3

af3c8d98508d3754  dcda20b3685f14d4d29d31592f  
----------------  --------------------------  
         %stddev      change         %stddev
             \          |                \  
       601                         587        unixbench.score
  37287192                    36393335        unixbench.time.minor_page_faults
         0            7e+03       7019 ± 58%  latency_stats.avg.io_schedule.nfs_wait_on_request.nfs_writepage_setup.nfs_updatepage.nfs_write_end.generic_perform_write.nfs_file_write.__vfs_write.vfs_write.SyS_write.entry_SYSCALL_64_fastpath
         0            7e+03       7019 ± 58%  latency_stats.max.io_schedule.nfs_wait_on_request.nfs_writepage_setup.nfs_updatepage.nfs_write_end.generic_perform_write.nfs_file_write.__vfs_write.vfs_write.SyS_write.entry_SYSCALL_64_fastpath
         0            7e+03       7019 ± 58%  latency_stats.sum.io_schedule.nfs_wait_on_request.nfs_writepage_setup.nfs_updatepage.nfs_write_end.generic_perform_write.nfs_file_write.__vfs_write.vfs_write.SyS_write.entry_SYSCALL_64_fastpath
      6253 ±119%     -5e+03        834 ±165%  latency_stats.sum.pipe_read.__vfs_read.vfs_read.SyS_read.entry_SYSCALL_64_fastpath
 4.258e+09               4%  4.418e+09        perf-stat.branch-misses
  1.04e+11                   1.065e+11        perf-stat.branch-instructions
 5.392e+11                   5.508e+11        perf-stat.instructions
      4.09                        4.15        perf-stat.branch-miss-rate%
  36099085                    35250152        perf-stat.page-faults
  36099083                    35250150        perf-stat.minor-faults
      1.74             -11%       1.54 ±  7%  perf-stat.cache-miss-rate%
 5.531e+08             -12%  4.891e+08 ±  6%  perf-stat.cache-misses



                                  unixbench.score

  610 ++--------------------------------------------------------------------+
      |                            *.  .* *.*   * .*                        |
  605 ++                           : **  *   *.* * :                        |
      **.*                        :                 :  **      *.* .***. *.**
  600 ++  *.*    *.**   *     *   *                 *.*  :  .**   *     *   |
      |      **.*    *.* + * + *.*                       : *                |
  595 ++                  * *                             *                 |
      |                                                                     |
  590 ++                                                                    |
      |            OOO OO OOO                                               |
  585 ++                                                                    |
      |      OO OO                                                          |
  580 OO OO O                                                               |
      |                                                                     |
  575 ++--------------------------------------------------------------------+

  [*] bisect-good sample
  [O] bisect-bad  sample


Disclaimer:
Results have been estimated based on internal Intel analysis and are provided
for informational purposes only. Any difference in system hardware or software
design or configuration may affect actual performance.


Thanks,
Xiaolong