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Message-ID: <20170605021344.GH16905@yexl-desktop>
Date:   Mon, 5 Jun 2017 10:13:44 +0800
From:   kernel test robot <xiaolong.ye@...el.com>
To:     "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>, lkp@...org
Subject: [lkp-robot] [rcu]  38044d1a6d:  unixbench.score 4.9% improvement


Greeting,

FYI, we noticed a 4.9% improvement of unixbench.score due to commit:


commit: 38044d1a6dc9c508ca103d8f9c9bf038dbf982f6 ("rcu: Eliminate NOCBs CPU-state Kconfig options")
https://git.kernel.org/cgit/linux/kernel/git/paulmck/linux-rcu.git dev.2017.05.31a

in testcase: unixbench
on test machine: 8 threads Intel(R) Core(TM) i7 CPU 870 @ 2.93GHz with 4G memory
with following parameters:

	runtime: 300s
	nr_task: 100%
	test: spawn

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-100%-spawn/nhm-white2

1f3bef5b9e25d870  38044d1a6dc9c508ca103d8f9c  
----------------  --------------------------  
      3460               5%       3628        unixbench.score
       771               6%        819        unixbench.time.system_time
       561               5%        590        unixbench.time.percent_of_cpu_this_job_got
  25857104               5%   27142050        unixbench.time.voluntary_context_switches
 3.042e+08               5%  3.181e+08        unixbench.time.minor_page_faults
      1083               5%       1132        unixbench.time.user_time
   5773378             -15%    4903021        unixbench.time.involuntary_context_switches
     61093             -48%      32045        interrupts.CAL:Function_call_interrupts
    178241                      173990        vmstat.system.cs
      2231               3%       2300        turbostat.Avg_MHz
     76.43               3%      78.76        turbostat.%Busy
      5.41              -7%       5.04 ±  6%  perf-stat.cache-miss-rate%
 3.045e+08               5%  3.185e+08        perf-stat.minor-faults
 3.045e+08               5%  3.185e+08        perf-stat.page-faults
 5.895e+11                    6.07e+11        perf-stat.branch-instructions
 3.139e+12                    3.23e+12        perf-stat.instructions
 3.145e+12                   3.236e+12        perf-stat.iTLB-loads
 7.591e+11                   7.789e+11        perf-stat.dTLB-stores
 9.183e+10                    9.38e+10        perf-stat.cache-references
  59333803                    57923350        perf-stat.context-switches
 1.376e+12                   1.414e+12        perf-stat.dTLB-loads
 5.839e+12               3%  6.019e+12        perf-stat.cpu-cycles
 6.916e+08             -16%  5.785e+08 ±  3%  perf-stat.node-loads
 1.539e+09                   1.579e+09        perf-stat.iTLB-load-misses
   9401934              12%   10489131        perf-stat.cpu-migrations
 2.005e+10                   2.053e+10        perf-stat.branch-misses
      6200 ± 31%      6e+04      61751        latency_stats.sum.io_schedule.__lock_page_or_retry.filemap_fault.__do_fault.__handle_mm_fault.handle_mm_fault.__do_page_fault.do_page_fault.page_fault
     21182 ± 10%     -2e+04       5660 ± 15%  latency_stats.sum.do_wait.SyS_wait4.do_syscall_64.return_from_SYSCALL_64



                               perf-stat.cpu-migrations

  1.12e+07 ++--------------------O------------------------------------------+
   1.1e+07 O+       O O O O O  O                                            |
           | O O  O                                                         |
  1.08e+07 ++                                                               |
  1.06e+07 ++                                                             O |
           |                       O   O O                       O O  O O   O
  1.04e+07 ++                        O      O O O O O O  O O O O            |
  1.02e+07 ++                                                               |
     1e+07 ++                                                               |
           |                                                                |
   9.8e+06 ++                                                               |
   9.6e+06 ++                                                               |
           *. .*..*. .*.*.*.*..*.*.            .*.*.*.            .*..*     |
   9.4e+06 ++*      *              *.*.*.*..*.*       *..*.*.*.*.*          |
   9.2e+06 ++---------------------------------------------------------------+


                                  unixbench.score

  3750 ++-------------------------------------------------------------------+
       |               O      O                                             |
  3700 ++          O O                                                      |
       O O      O        O  O                                             O |
  3650 ++   O O                                                  O O        |
       |                        O      O           O                        O
  3600 ++                          O O    O O O      O O  O O O      O O    |
       |                                        O                           |
  3550 ++                                                                   |
       |                                                                    |
  3500 *+          *.*.                           .*                        |
       |+  .*.*. ..    *.*..*.*.               .*.  +      .*.    .*.*      |
  3450 ++*.     *               *..*.*.*..*.*.*      *.*..*   *..*          |
       |                                                                    |
  3400 ++-------------------------------------------------------------------+


                             unixbench.time.user_time

  1170 ++-------------------------------------------------------------------+
       | O  O   O  O O O O  O O                                             |
  1160 O+     O                                                             |
  1150 ++                                                                   |
       |                                                                    |
  1140 ++                                                                 O |
  1130 ++                       O  O        O O O  O O O  O O O  O O O O    O
       |                             O O  O                                 |
  1120 ++                                                                   |
  1110 ++                                                                   |
       |                                                                    |
  1100 ++                                                                   |
  1090 ++                                                                   |
       |.*..      .*.          .*..*. .*..     .*..      .*. .*.. .*.*      |
  1080 *+---*-*-*----*-*-*--*-*------*----*-*-*----*-*-*----*----*----------+


                            unixbench.time.system_time

  860 ++--------------------------------------------------------------------+
  850 O+                                                                    |
      | O  O O O  O O    O O O                                              |
  840 ++              O                                                     |
  830 ++                                                                    |
      |                         O O O  O O O  O O O  O               O O    |
  820 ++                                               O O  O O O  O      O O
  810 ++                                                                    |
  800 ++                                                                    |
      |                                                                     |
  790 ++                                                                    |
  780 ++                                                                    |
      *.*..*.*.*.. .*.*..*.*.*.. .*.*..*.*.*..*.*.*..*.*.  .*. .*..*.*      |
  770 ++          *             *                        *.   *             |
  760 ++--------------------------------------------------------------------+


                       unixbench.time.voluntary_context_switches

   2.8e+07 ++---------------------------------------------------------------+
           |                     O                                          |
           |            O O                                                 |
  2.75e+07 O+       O O     O  O                                            |
           | O O  O                                              O        O |
           |                       O     O          O              O  O O   O
   2.7e+07 ++                          O    O O O     O  O O O O            |
           |                         O            O                         |
  2.65e+07 ++                                                               |
           |                                                                |
           |                                                                |
   2.6e+07 *+ .*..*. .*.*.*.*..*.                  .*.            .*..      |
           | *      *            *.*.*.*.*..*.*.*.*   *..*.*.*. .*    *     |
           |                                                   *            |
  2.55e+07 ++---------------------------------------------------------------+

  [*] 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

View attachment "config-4.12.0-rc1-00083-g38044d1" of type "text/plain" (159054 bytes)

View attachment "job-script" of type "text/plain" (6653 bytes)

View attachment "job.yaml" of type "text/plain" (4335 bytes)

View attachment "reproduce" of type "text/plain" (24 bytes)

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