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Date:	Mon, 21 Mar 2016 15:13:45 +0800
From:	kernel test robot <xiaolong.ye@...el.com>
To:	Rik van Riel <riel@...hat.com>
Cc:	0day robot <fengguang.wu@...el.com>,
	LKML <linux-kernel@...r.kernel.org>, lkp@...org
Subject: [lkp] [cpuidle] 664ef5b861: No primary result change, +13.7%
 turbostat.PkgWatt

FYI, we noticed that turbostat.PkgWatt +13.7% change with your commit.

https://github.com/0day-ci/linux Rik-van-Riel/cpuidle-break-out-of-idle-polling-loop-after-HLT-threshold/20160319-053854
commit 664ef5b8615ff12b03b46988408b4c0a15eab07c ("cpuidle: use high confidence factors only when considering polling")

=========================================================================================
cluster/compiler/cpufreq_governor/ip/kconfig/nr_threads/rootfs/runtime/tbox_group/test/testcase:
  cs-localhost/gcc-4.9/performance/ipv4/x86_64-rhel/1/debian-x86_64-2015-02-07.cgz/300s/lkp-hsw-d01/SCTP_RR/netperf

commit: 
  38497f04cd3604396327ba1810dde0ac239989f4
  664ef5b8615ff12b03b46988408b4c0a15eab07c

38497f04cd360439 664ef5b8615ff12b03b4698840 
---------------- -------------------------- 
         %stddev     %change         %stddev
             \          |                \  
     67771 ±  1%      +2.8%      69694 ±  1%  netperf.Throughput_tps
     77.00 ±  0%      +1.3%      78.00 ±  0%  netperf.time.percent_of_cpu_this_job_got
    226.75 ±  0%      +3.3%     234.16 ±  0%  netperf.time.system_time
  20330477 ±  1%      +2.8%   20907309 ±  1%  netperf.time.voluntary_context_switches
      9.29 ± 10%     -42.2%       5.38 ±  6%  time.user_time
    266114 ±  1%      +2.8%     273497 ±  1%  vmstat.system.cs
      1929 ±  1%    +374.1%       9148 ± 23%  vmstat.system.in
 1.622e+08 ±  6%     -64.3%   57961470 ±  6%  cpuidle.C1-HSW.time
  33127115 ±  3%     -96.7%    1109711 ± 50%  cpuidle.C1-HSW.usage
   5649502 ± 10%     +16.0%    6551668 ±  2%  cpuidle.C3-HSW.time
  63535957 ± 10%    +117.7%  1.383e+08 ±  1%  cpuidle.POLL.time
   7659494 ± 10%   +1097.5%   91718696 ±  3%  cpuidle.POLL.usage
     21.06 ±  1%     +16.3%      24.50 ±  0%  turbostat.%Busy
    794.00 ±  2%     +19.7%     950.33 ±  0%  turbostat.Avg_MHz
     20.14 ± 12%     -20.2%      16.06 ± 10%  turbostat.CPU%c1
      0.38 ±  5%     +18.5%       0.45 ±  3%  turbostat.CPU%c3
     17.24 ±  0%     +21.0%      20.85 ±  2%  turbostat.CorWatt
     25.77 ±  0%     +13.7%      29.31 ±  1%  turbostat.PkgWatt
      0.51 ± 39%    +164.7%       1.36 ± 36%  perf-profile.cycles-pp._raw_spin_lock_bh.lock_sock_nested.sctp_skb_recv_datagram.sctp_recvmsg.sock_common_recvmsg
      0.51 ± 34%    +142.9%       1.23 ± 27%  perf-profile.cycles-pp.cpuidle_select.cpu_startup_entry.start_secondary
      1.34 ±  7%     +11.8%       1.50 ±  5%  perf-profile.cycles-pp.dequeue_entity.dequeue_task_fair.deactivate_task.__schedule.schedule
     14.74 ± 14%     -78.4%       3.18 ± 68%  perf-profile.cycles-pp.intel_idle.cpuidle_enter_state.cpuidle_enter.call_cpuidle.cpu_startup_entry
      1.32 ± 12%     -28.5%       0.94 ± 18%  perf-profile.cycles-pp.is_ftrace_trampoline.print_context_stack.dump_trace.save_stack_trace_tsk.__account_scheduler_latency
      1.16 ± 17%     -21.3%       0.91 ± 19%  perf-profile.cycles-pp.kfree_skb.sctp_ulpevent_free.sctp_recvmsg.sock_common_recvmsg.sock_recvmsg
      0.00 ± -1%      +Inf%      17.25 ±  4%  perf-profile.cycles-pp.ktime_get.poll_idle.cpuidle_enter_state.cpuidle_enter.call_cpuidle
      0.68 ± 31%    +126.6%       1.55 ± 33%  perf-profile.cycles-pp.lock_sock_nested.sctp_skb_recv_datagram.sctp_recvmsg.sock_common_recvmsg.sock_recvmsg
      0.38 ± 41%    +178.9%       1.06 ± 28%  perf-profile.cycles-pp.menu_select.cpuidle_select.cpu_startup_entry.start_secondary
      0.30 ± 82%    +304.4%       1.22 ± 42%  perf-profile.cycles-pp.native_queued_spin_lock_slowpath._raw_spin_lock_bh.lock_sock_nested.sctp_skb_recv_datagram.sctp_recvmsg
      9.13 ± 35%    +165.1%      24.19 ±  3%  perf-profile.cycles-pp.poll_idle.cpuidle_enter_state.cpuidle_enter.call_cpuidle.cpu_startup_entry
      0.00 ± -1%      +Inf%      10.46 ±  2%  perf-profile.cycles-pp.read_tsc.ktime_get.poll_idle.cpuidle_enter_state.cpuidle_enter
      1.14 ± 14%     -16.2%       0.95 ±  8%  perf-profile.cycles-pp.sctp_make_control.sctp_make_sack.sctp_packet_append_chunk.sctp_packet_transmit_chunk.sctp_outq_flush
      1.71 ± 10%     -16.3%       1.43 ±  5%  perf-profile.cycles-pp.sctp_make_sack.sctp_packet_append_chunk.sctp_packet_transmit_chunk.sctp_outq_flush.sctp_outq_uncork
      3.00 ±  8%     -12.8%       2.62 ±  4%  perf-profile.cycles-pp.sctp_packet_transmit_chunk.sctp_outq_flush.sctp_outq_uncork.sctp_cmd_interpreter.sctp_do_sm
      1.40 ±  7%     -23.9%       1.06 ± 11%  perf-profile.cycles-pp.sctp_transport_reset_timers.sctp_outq_flush.sctp_outq_uncork.sctp_cmd_interpreter.sctp_do_sm
      1.59 ± 20%     -24.9%       1.19 ± 24%  perf-profile.cycles-pp.sctp_ulpevent_free.sctp_recvmsg.sock_common_recvmsg.sock_recvmsg.___sys_recvmsg


lkp-hsw-d01: Haswell
Memory: 8G



                                turbostat.PkgWatt

  35 ++---------------------------------------------------------------------+
     |   O                                                                  |
  30 OOO  OO O  OOO O O                                                     |
     |      O                                                       *  *    |
  25 **  ******.*****.******.* ***.*** *.******.** **.******.*****.* ** *.***
     |:  :                   : :     : :         : :                        |
  20 ++  :                   : :     : :         : :                        |
     |: :                    : :     : :         : :                        |
  15 ++ :                    : :     : :         : :                        |
     | ::                     ::      ::          ::                        |
  10 ++::                     :       :           :                         |
     | ::                     :       :           :                         |
   5 ++:                      :       :           :                         |
     | :                      :       :           :                         |
   0 ++*------O----O----------*-------*-----------*-------------------------+


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

To reproduce:

        git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git
        cd lkp-tests
        bin/lkp install job.yaml  # job file is attached in this email
        bin/lkp run     job.yaml


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 Ye.

View attachment "job.yaml" of type "text/plain" (3619 bytes)

View attachment "reproduce" of type "text/plain" (848 bytes)

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