LKP October 2013

lkp@lists.01.org

3 participants
3 discussions

+8.6% netperf.Throughput_Mbps increase by "page_alloc: fair zone allocator policy"

by fengguang.wu＠intel.com

Hi Johannes, We are pleased to notice that your commit 81c0a2bb51 ("mm: page_alloc: fair zone allocator policy") improves performance in the netperf TCP_STREAM case: e085dbc52fad8d79fa22 81c0a2bb515fd4daae8c ------------------------ ------------------------ 649.00 +8.6% 704.80 lkp-nex04/micro/netperf/120s-200%-TCP_STREAM 649.00 +8.6% 704.80 TOTAL netperf.Throughput_Mbps Thanks, Fengguang PS. The changed items compared between the bisect GOOD/BAD commits. netperf.Throughput_Mbps 760 ++-------------------------------------------------------------------+ | | 740 O+ O O OO O OO | | OO O | 720 ++ O | | O O O O O O O OO O O O OO | 700 ++ OO OO O OO O O O O O O | | 680 *+**.*.*.**.*.*.* | | : * | 660 ++ : : : O .* | | :.*.* : : .* .* *.*. * + O | 640 ++ * * * * + .* * * | | * | 620 ++-------------------------------------------------------------------+ vmstat.system.cs 550000 ++----------------------------------------------------------------+ 500000 O+O O OO O OO O OO O O OO O O O O O O O O OO O O OO O OO | | O O O O | 450000 ++ O O O 400000 ++ | 350000 ++ O O | 300000 ++ | | | 250000 ++ | 200000 ++ | 150000 ++ | 100000 ++ | | | 50000 *+**.*.**.*.**.*.**.**.*.**.*.**.*.**.*.**.* | 0 ++----------------------------------------------------------------+ lock_stat.&(&zone->lock)->rlock.contentions 2.4e+07 ++---------------------------------------------------------------+ | O O | 2.2e+07 O+OO O OO OO O OO O | O O | 2e+07 ++ | | O OO O O O OO O O O | 1.8e+07 ++ O O O O O O O O O O O O O | | O | 1.6e+07 ++ | | | 1.4e+07 ++ .* * | *.**.*.**.**.*.**.* :+ *.*.* | 1.2e+07 ++ * *.*.**.**.*.** | | | 1e+07 ++---------------------------------------------------------------+ lock_stat.&(&zone->lock)->rlock.contentions.get_page_from_freelist 2.6e+07 ++---------------------------------------------------------------+ | O OO O O O | 2.4e+07 O+OO OO O O O 2.2e+07 ++ O O | | O OO O O O OO O O O O | 2e+07 ++ O O O O O OO O O O O O O | 1.8e+07 ++ | | | 1.6e+07 ++ | 1.4e+07 ++ | | | 1.2e+07 ++ * | 1e+07 *+**.*.**.**.*.**.*.* + *.*.* | | * *.*.**.**.*.** | 8e+06 ++---------------------------------------------------------------+ lock_stat.&(&zone->lock)->rlock.contentions.__free_pages_ok 2.2e+07 ++---------------------------------------------O-----------------+ | O | 2.1e+07 ++ | 2e+07 ++ O O O O O O OO O OO | 1.9e+07 ++ O O O | | | 1.8e+07 ++ | | OO O | 1.7e+07 ++ .*O * O O O OO O O OO | 1.6e+07 ++**. .* *.* O : O O O O O O O O O | * *.** *.*.* :: :.*.* O | 1.5e+07 ++ :: * *. .* .* .*.* | | * * * * * | 1.4e+07 ++---------------------------------------------------------------+ lock_stat.rcu_node_1.contentions 100000 ++----------------------------------------------------------------+ 95000 ++ * | | *. +: | 90000 ++ * *.*. * : * :.* | 85000 ++ :+ : * + +: * | | * * *.: * : * * | 80000 *+**. + *.*.* + .* * +: O | 75000 ++ * * O *O | 70000 ++ O O OO O O OO | O O OO O O O O O O O O O O O 65000 ++ O O O O O O O OO O | 60000 ++ O O O | | O | 55000 ++ O | 50000 ++----------------------------------------------------------------+ lock_stat.rcu_node_1.contentions.rcu_process_callbacks 180000 ++----------------------------------------------------------------+ | * | 170000 ++ * :: | 160000 ++ :+ : : | | * *.*. * : * *.* | 150000 ++ * * :+ : * + +: | 140000 *+ * : *.*. :+ .**.: *.: O * * | | * + : O * * O * *O O | 130000 ++OO * O O O OO O O O OO O | 120000 O+ O O O O O O O O OO O O | O O O O O | 110000 ++ O O O O | 100000 ++ O | | | 90000 ++----------------------------------------------------------------+ iostat.cpu.user 1.8 ++-------------------------------------------------------------------+ 1.7 ++ O OO O O OO O O | | O O O | 1.6 ++O O O O O OO O O OO O O O | 1.5 O+ O O O O O OO O | 1.4 ++ O O | 1.3 ++ O O | | 1.2 ++ O O | 1.1 ++ * | 1 ++ + :.*.* | 0.9 *+ *.*.*.* .*.*.* *.*.* * *.*.* | | * * :.*. .*.*.* | 0.8 ++ * ** | 0.7 ++-------------------------------------------------------------------+

8 years, 11 months

1
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0 / 0

[page->ptl] performance changes

by Fengguang Wu

Hi Kirill, FYI, we see big performance changes with you commit: commit b5be3c49b81094d7aa0cefafac50c69d788be2ed Author: Kirill A. Shutemov <kirill.shutemov(a)linux.intel.com> Date: Wed Oct 9 16:45:45 2013 +0300 mm: dynamic allocate page->ptl if it cannot be embedded to struct page Signed-off-by: Kirill A. Shutemov <kirill.shutemov(a)linux.intel.com> :040000 040000 17899e0220d995b818586bf7beff7717c754148b 7161f88433ea4e4cd1913dadda4248731c1af9cd M arch :040000 040000 d957e2d0991054a1c601d088f9fddbd79a97a262 b28decbfc775fc858626c67017d32405f61694d0 M include :040000 040000 1908d09dfad8b4c0e1e088f5eecbfd47b446e144 c7799383dab307848bbb891cb1f2e1ebbebe7124 M mm bisect run success # bad: [7a6e4b26215d315c80d49ed3a14deaafaf276e48] Merge 'radeon-alex/drm-fixes-3.12' into devel-hourly-2013101006 # good: [15c03dd4859ab16f9212238f29dd315654aa94f6] Linux 3.12-rc3 git bisect start '7a6e4b26215d315c80d49ed3a14deaafaf276e48' '15c03dd4859ab16f9212238f29dd315654aa94f6' '--' # good: [2a02081f51ac5f9a3c61e7105be6d8f227d5ddc7] Merge 'regmap/topic/core' into devel-hourly-2013101006 git bisect good 2a02081f51ac5f9a3c61e7105be6d8f227d5ddc7 # good: [6e3172648c99be68179beee1e2df90486a54dd8b] Merge 'arm-soc/next/dt' into devel-hourly-2013101006 git bisect good 6e3172648c99be68179beee1e2df90486a54dd8b # bad: [b572b6ab9498e59e475743a00658a3600f2b3f1a] Merge 'ipsec-next/testing' into devel-hourly-2013101006 git bisect bad b572b6ab9498e59e475743a00658a3600f2b3f1a # bad: [2d6ed245dbe4713ca7d8a106d0153acdaaf67fdf] Merge 'rcu/dev.2013.10.09b' into devel-hourly-2013101006 git bisect bad 2d6ed245dbe4713ca7d8a106d0153acdaaf67fdf # good: [30b8b333e4a3874146a5c7d6c95573e9ff173697] Merge 'arm-soc/mvebu/drivers' into devel-hourly-2013101006 git bisect good 30b8b333e4a3874146a5c7d6c95573e9ff173697 # good: [8c8f6e64847f9407f30238dd3e7ab6c0f97429ff] sh: handle pgtable_page_ctor() fail git bisect good 8c8f6e64847f9407f30238dd3e7ab6c0f97429ff # good: [b6ef7255b339a978a559c7fd02a5e67f3099cccb] mlx4_fc: enable FC target role git bisect good b6ef7255b339a978a559c7fd02a5e67f3099cccb # bad: [28c1de28a19c6efb6ef7380c5f4701018f8c7874] Merge 'kas/dynamic_ptl/v1' into devel-hourly-2013101006 git bisect bad 28c1de28a19c6efb6ef7380c5f4701018f8c7874 # good: [ffacba0ebf499ac928254c156cc9ca80074e331e] unicore32: handle pgtable_page_ctor() fail git bisect good ffacba0ebf499ac928254c156cc9ca80074e331e # good: [9619df7b869352bfef98f0e93ac0a2ce1f9a58be] xtensa: handle pgtable_page_ctor() fail git bisect good 9619df7b869352bfef98f0e93ac0a2ce1f9a58be # bad: [b5be3c49b81094d7aa0cefafac50c69d788be2ed] mm: dynamic allocate page->ptl if it cannot be embedded to struct page git bisect bad b5be3c49b81094d7aa0cefafac50c69d788be2ed # good: [cdf8588809f4bedbf92f11d3c59f3d7a16f19d5b] iommu/arm-smmu: handle pgtable_page_ctor() fail git bisect good cdf8588809f4bedbf92f11d3c59f3d7a16f19d5b # first bad commit: [b5be3c49b81094d7aa0cefafac50c69d788be2ed] mm: dynamic allocate page->ptl if it cannot be embedded to struct page time.user_time 160 ++-------------------------------------------------------------------+ | | 140 ++ O | 120 ++ | | O O O O | 100 O+O O O O O O O | | O O O O O O | 80 ++ O O O O O O | | O O O | 60 ++ O | 40 ++ | *. .*. .* .*.*. *.*. .*. .**.| 20 ++**.*. .** * *.*.** * *.**.*.**. .*.** **.*.*.* .*.* * | * * * | 0 ++-------------------------------------------------------------------+ time.minor_page_faults 2.2e+08 ++---------------------------------------------------------------+ | | 2e+08 O+OO OO O O O OO O O O O O OO O O | 1.8e+08 ++ | | O O O | 1.6e+08 ++ O O O OO O O | 1.4e+08 ++ | | | 1.2e+08 ++ | 1e+08 ++ | | | 8e+07 ++ | 6e+07 ++ | *.**.*.**.**. .**.*.**.**.*.**.*.**.**.*.**.*.**.**.*.**.*.**.**.* 4e+07 ++-----------*---------------------------------------------------+ time.voluntary_context_switches 600000 ++-O----O---------------------------O---O--O--O-------------------+ O O O O O O O OO O O O O | 500000 ++ | | | | | 400000 ++ O | | O O O O OO O O O | 300000 ++ | | | 200000 ++ | | | *. .*.* .*.**. .*.**.*.**.*. *.*. *.*.**.*.* .**.*. *.*.**.| 100000 ++**.*.** * ** * * * * * | | 0 ++----------------------------------------------------------------+ will-it-scale.page_fault3.15.threads 2.2e+06 ++O--------------------------------------------------------------+ O O O OO OO O OO O OO OO O OO O OO OO O OO O O | 2e+06 ++ | | | 1.8e+06 ++ | 1.6e+06 ++ | | | 1.4e+06 ++ | | | 1.2e+06 ++ | 1e+06 ++ | | | 800000 ++ .*. *. .*. .* | *.**.*.**.**.*.** * **.*.**.*.**.**.*.**.*.**.** **.*.** *.* 600000 ++---------------------------------------------------------------+ will-it-scale.page_fault3.15.threads_idle 95 ++------------------------------------------------------------------+ 94.5 O+OO O O OO O OO O OO O O OO O OO OO O O OO O O | | O | 94 ++ | 93.5 ++ | | | 93 ++ | 92.5 ++ | 92 ++ | | | 91.5 ++ | 91 ++ | | | 90.5 ++* .*.* .*. *.*.* .**.*. *. | 90 *+-*-*----*---*-----*-*-*-**-*-**-*-**-*-*------**-*-*--*-*-**-*-**-* will-it-scale.page_fault3.30.threads 1.8e+06 ++O------------------------------------O-O-----------------------+ O O O OO O O OO O O OO O OO O OO OO O O O | 1.6e+06 ++ O O | | | 1.4e+06 ++ | 1.2e+06 ++ | | | 1e+06 ++ | | | 800000 ++ | 600000 ++ | | | 400000 ++* *. *. *. .*.**. .* .*.* .* .**.| * *.*.**.**.*.**.*.**.* *.* *.* ** * *.** *.* * * 200000 ++---------------------------------------------------------------+ will-it-scale.page_fault3.30.threads_idle 88 ++--------------------------------------------------------------------+ 87 O+O OO O O O O O OO O O OO O O OO O O OO O O OO O | | O | 86 ++ | 85 ++ | 84 ++ | 83 ++ | | | 82 ++ | 81 ++ | 80 ++ | 79 ++ | |.*. *. .*. .* .*. .**.| 78 *+ **.*.*.**.*.*.**.*.*.* *.*.**.* **.*.* *.*.*.**.*.*.** * * 77 ++--------------------------------------------------------------------+ will-it-scale.page_fault3.45.threads 1.6e+06 ++---------------------------------------------------------------+ O O O O OO OO O OO | 1.4e+06 ++OO OO O O OO O OO OO O OO O O | | | 1.2e+06 ++ | | | 1e+06 ++ | | | 800000 ++ | | | 600000 ++ | | | 400000 ++* | * *.*.**.**.*.**.*.**.**.*.**.*.**.**. .**.*.**.**.*.**.*.**.**.* 200000 ++-------------------------------------*-------------------------+ will-it-scale.page_fault3.45.threads_idle 80 ++--------------------------------------------------------------------+ O O OO OO O O OO O O OO O O OO O O OO O | 78 ++ O O O OO O | 76 ++ | | | 74 ++ | | | 72 ++ | | | 70 ++ | 68 ++ | |.*. *. .*. | 66 *+ **.*.*.* * **.*.*.**.*.*.**.*.*.**. .*.**.*.*.**.*.*.**.*.*.**.* | * | 64 ++--------------------------------------------------------------------+ will-it-scale.page_fault3.60.threads 1.8e+06 ++---------------------------------------------------------------+ | O O O O O | 1.6e+06 O+OO O O O OO O OO O O OO OO O O OO O | | O O | 1.4e+06 ++ | 1.2e+06 ++ | | | 1e+06 ++ | | | 800000 ++ | 600000 ++ | | | 400000 ++ | *.**.*.**.**. .**.*.**.* .*.**.*.**.**.*.**.*.**.**.*. *.*.**.**.* 200000 ++-----------*----------*-----------------------------*----------+ will-it-scale.page_fault3.60.threads_idle 75 O+---O---O-O--O-O------O--O---O-OO------O-----O--O--------------------+ | O O O OO O O O O O O O O O | | O | 70 ++ | | | | | 65 ++ | | | 60 ++ | | | | | 55 *+*.**.*.*.**. .*.**.*.*.**.*.*.**.*.*.**.*.*.**.*.*.**.*.*.**.*.*.**.* | * | | | 50 ++--------------------------------------------------------------------+ will-it-scale.page_fault3.90.threads 1.8e+06 ++---------------------------------------------------------------+ | OO O OO OO O O O O O O O OO O O O | 1.6e+06 O+ O O OO O O O OO | | | 1.4e+06 ++ | 1.2e+06 ++ | | | 1e+06 ++ | | | 800000 ++ | 600000 ++ | | | 400000 ++ | *. *.*.**.**.*.**.*.**.**.*.**.*.**.**.*.**.*.**.**.*.**.*.**.**.| 200000 ++*--------------------------------------------------------------* will-it-scale.page_fault3.90.threads_idle 70 ++--------------------------------------------------------------------+ | | 65 ++O OO O O OO O OO O O OO O O OO O OO O O OO O | 60 O+ O O | | | 55 ++ | | | 50 ++ | | | 45 ++ | 40 ++ | | | 35 ++ | *.*.**.*.*.**.*.*.**.*.*.**.*.*.**.*.*.**.*.*.**.*.*.**.*.*.**.*.*.**.* 30 ++--------------------------------------------------------------------+ will-it-scale.page_fault3.120.threads 1.8e+06 ++---------------------------------------------------------------+ O OO O OO OO O OO O O OO O OO O OO OO O OO O O | 1.6e+06 ++ | | O | 1.4e+06 ++ | 1.2e+06 ++ | | | 1e+06 ++ | | | 800000 ++ | 600000 ++ | | | 400000 ++ | *.**.*.**.**.*.**.*.**. *.*.**.*. *.**.*.**.*.**.**. .**.*.**.**.* 200000 ++---------------------*---------*------------------*------------+ will-it-scale.page_fault3.120.threads_idle 60 ++--------------------------------------------------------------------+ 55 O+O O O OO O O OO O OO O O O O O | | OO O O O O O O OO O | 50 ++ | 45 ++ | 40 ++ | 35 ++ | | | 30 ++ | 25 ++ | 20 ++ | 15 ++ | *.*.**.*.*.**.*.*.**.*.*. *.*.*.**. .**.*.*. *.*.*.**. .*.**.*. .**.* 10 ++ * *.* * * * | 5 ++--------------------------------------------------------------------+ vmstat.system.in 18600 ++--------------------------*--------------------------------------+ 18400 ++ *.* *. .* .* *.**.*.* *.*. * | *.* + : * * + : * + *.*.* .*. .*.* .*. *.*.**.* 18200 ++ * * : *.* * ** * * | 18000 ++ * | | | 17800 ++ | 17600 ++ | 17400 ++ | | | 17200 O+OO O O O | 17000 ++ O OO O OO OO O O OO O O O | | O O O O O O O | 16800 ++ O | 16600 ++-----------------------------------------------------------------+ vmstat.system.cs 7000 ++------------------------------------------------------------------+ 6500 ++OO O OO O OO O O OO O O OO O O | O O O O O O O OO O O | 6000 ++ | 5500 ++ | | | 5000 ++ | 4500 ++ | 4000 ++ | | | 3500 ++ | 3000 ++ | | | 2500 ++ .*. .* | 2000 *+**-*-*-**---**-*-**-*-*-**-*-**-*-**-*-*-**-*-**-*-**-*-*-**-*--*-* vmstat.cpu.id 68 ++-----O-O-O--O---O-------O-O-O-OO-O---O------------------------------+ | | 67 O+O OO O O O O O O O O O O OO O | 66 ++ | | | 65 ++ | 64 ++ | | | 63 ++ | 62 ++ | | | 61 ++ | 60 ++ | | | 59 *+*-**-*-*-**-*-*-**-*-*-**-*-*-**-*-*-**-*-*-**-*-*-**-*-*-**-*-*-**-* lock_stat.&(&mm->page_table_lock)->rlock.contentions 6e+07 ++-----------------------------------------------------------------+ |.* .* | 5e+07 *+ *.*.**.*.* .*.**.*.**.*.**.*.*.**.*.**.*.**.*.**.*.**.*.**.* *.* | * | | | 4e+07 ++ | | | 3e+07 ++ | | | 2e+07 ++ | | | | | 1e+07 ++ | | | 0 O+OO-O-OO-O-OO-O-OO-O-OO-O-OO-O-O-OO-O-OO-O-OO-O-------------------+ iostat.cpu.user 1.4 ++-------------------------------------------------------------------+ | | 1.3 ++ O O | | O OO O | 1.2 O+O O O O O O O O | | O O O O O O O | 1.1 ++ O OO O | | O | 1 ++ O O | | * * | 0.9 ++ + + **.* :+ .* * *. * | *.* .*. .* * + +: *. *.* :+ + .* + * +| 0.8 ++ * *.** *.*.**.*.*. .* * *.* * * *.* * | **.* | 0.7 ++-------------------------------------------------------------------+ iostat.cpu.system 40 *+--*--*---*--*---**-*-*-**-*-*-**-*-*--*---*-**-*-*-**-*-*-**-*-*-*--* 39 ++* * * * * * * * | | | 38 ++ | 37 ++ | | | 36 ++ | 35 ++ | 34 ++ | | | 33 ++ | 32 ++ | | O | 31 O+O OO O O OO O O OO O OO O O OO O O OO O O OO O | 30 ++--------------------------------------------------------------------+ iostat.cpu.idle 69 ++--------------------------------------------------------------------+ 68 O+O O O O O O O O O OO O O OO O O OO O OO O | | O O O O O | 67 ++ | 66 ++ | | | 65 ++ | 64 ++ | 63 ++ | | | 62 ++ | 61 ++ | | | 60 *+*.**.*.*.**.*.*.**.*.*. *.*.*.**. .*.**.*.*.**.*.*.**. .*.**.*.*.**.| 59 ++-----------------------*---------*--------------------*-------------*

8 years, 11 months

1
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0 / 0

Re: [LKP] [tip:sched/core] sched/balancing: Fix cfs_rq-> task_h_load calculation

by Yuanhan Liu

On Fri, Sep 20, 2013 at 06:46:59AM -0700, tip-bot for Vladimir Davydov wrote: > Commit-ID: 7e3115ef5149fc502e3a2e80719dba54a8e7409d > Gitweb: http://git.kernel.org/tip/7e3115ef5149fc502e3a2e80719dba54a8e7409d > Author: Vladimir Davydov <vdavydov(a)parallels.com> > AuthorDate: Sat, 14 Sep 2013 19:39:46 +0400 > Committer: Ingo Molnar <mingo(a)kernel.org> > CommitDate: Fri, 20 Sep 2013 11:59:39 +0200 > > sched/balancing: Fix cfs_rq->task_h_load calculation > > Patch a003a2 (sched: Consider runnable load average in move_tasks()) > sets all top-level cfs_rqs' h_load to rq->avg.load_avg_contrib, which is > always 0. This mistype leads to all tasks having weight 0 when load > balancing in a cpu-cgroup enabled setup. There obviously should be sum > of weights of all runnable tasks there instead. Fix it. Hi Vladimir, FYI, Here we found a 17% netperf regression by this patch. Here are some changed stats between this commit 7e3115ef5149fc502e3a2e80719dba54a8e7409d and it's parent(3029ede39373c368f402a76896600d85a4f7121b) NOTE: both commit had been tested 10+ times. stat 7e3115ef5149fc502e3a2e80719 3029ede39373c368f402a768966 netperf.Throughput_Mbps [ 2515 - 2593 ] -- [ 3010 - 3042 ] lock_stat.&(&base->lock)->rlock.contentions.run_timer_softirq [ 188 - 261 ] -- [ 1907 - 2018 ] lock_stat.&rq->lock.contentions [ 16885 - 23944 ] -- [ 2.6544e+05 - 2.8201e+05 ] lock_stat.slock-AF_INET/1.contentions.release_sock [ 28993 - 34079 ] -- [ 2.6537e+05 - 2.7814e+05 ] lock_stat.slock-AF_INET/1.contentions.tcp_v4_rcv [ 54906 - 64453 ] -- [ 4.6572e+05 - 4.8895e+05 ] lock_stat.slock-AF_INET/1.contentions [ 54778 - 64265 ] -- [ 4.6503e+05 - 4.8831e+05 ] lock_stat.slock-AF_INET/1.contentions.lock_sock_nested [ 25382 - 29998 ] -- [ 1.9822e+05 - 2.0934e+05 ] lock_stat.slock-AF_INET.contentions.lock_sock_nested [ 1.5861e+05 - 1.8802e+05 ] -- [ 1.2317e+06 - 1.3016e+06 ] lock_stat.slock-AF_INET.contentions.tcp_v4_rcv [ 1.9181e+05 - 2.2617e+05 ] -- [ 1.5482e+06 - 1.6346e+06 ] lock_stat.slock-AF_INET.contentions [ 1.9259e+05 - 2.269e+05 ] -- [ 1.5536e+06 - 1.6403e+06 ] lock_stat.&(&base->lock)->rlock.contentions [ 5658 - 9045 ] -- [ 1.3812e+05 - 1.478e+05 ] lock_stat.&(&base->lock)->rlock.contentions.lock_timer_base [ 11006 - 17636 ] -- [ 2.7183e+05 - 2.9104e+05 ] lock_stat.slock-AF_INET.contentions.release_sock [ 33931 - 39607 ] -- [ 3.2735e+05 - 3.4512e+05 ] lock_stat.&(&base->lock)->rlock.contentions.mod_timer [ 93 - 152 ] -- [ 2347 - 2643 ] lock_stat.&(&zone->lock)->rlock.contentions.__free_pages_ok [ 6.4647e+07 - 6.6226e+07 ] -- [ 5.3604e+07 - 5.5065e+07 ] vmstat.system.in [ 8921 - 9414 ] -- [ 27103 - 28369 ] vmstat.system.cs [ 1.4924e+05 - 1.9988e+05 ] -- [ 6.1384e+05 - 6.4036e+05 ] lock_stat.&(&zone->lock)->rlock.contentions [ 6.7612e+07 - 6.9817e+07 ] -- [ 5.7419e+07 - 5.8889e+07 ] lock_stat.rcu_node_1.contentions.rcu_process_callbacks [ 81543 - 87346 ] -- [ 97955 - 1.0295e+05 ] iostat.cpu.user [ 1.4141 - 1.5051 ] -- [ 2.1044 - 2.1732 ] lock_stat.&(&zone->lock)->rlock.contentions.get_page_from_freelist [ 7.0564e+07 - 7.3656e+07 ] -- [ 6.1222e+07 - 6.2746e+07 ] lock_stat.&rq->lock.contentions.__schedule [ 8276 - 11422 ] -- [ 1.1656e+05 - 1.9275e+05 ] iostat.cpu.system [ 95.387 - 95.516 ] -- [ 94.736 - 94.81 ] vmstat.cpu.sy [ 96 - 96 ] -- [ 95 - 95 ] And here are the text plot charts for those changed stats: * for 7e3115ef5149fc502e3a2e80719dba54a8e7409d(this commit) O for 3029ede39373c368f402a76896600d85a4f7121b(parent) netperf.Throughput_Mbps 3100 ++------------------------------------------------------------------+ O O | 3000 ++ O O O O O O O O | | | | 2900 ++ | | | 2800 ++ | | | 2700 ++ | | | | | 2600 ++ ..*......*.......*......*.......*...... ....* | .... *... | 2500 *+------*------*----------------------------------------------------+ vmstat.system.in 30000 ++-----------------------------------------------------------------+ 28000 O+ O O O | | O O O O O O 26000 ++ | 24000 ++ | 22000 ++ | 20000 ++ | | | 18000 ++ | 16000 ++ | 14000 ++ | 12000 ++ | | | 10000 *+.....*.......*......*.......*......*.......*......*.......*......* 8000 ++-----------------------------------------------------------------+ vmstat.system.cs 700000 ++----------------------------------------------------------------+ O O | 600000 ++ O O O O O O O O | | | | 500000 ++ | | | 400000 ++ | | | 300000 ++ | | | | ...* 200000 ++ ...*...... ....*...... ....*... | *......*.......*... *... *......*... | 100000 ++----------------------------------------------------------------+ vmstat.cpu.sy 96 *+------*------*--------------*-------*------*-------*------*-------* | : : | | : : | 95.8 ++ : : | | : : | | : : | 95.6 ++ : : | | : : | 95.4 ++ : : | | : : | | : : | 95.2 ++ : : | | : : | | : : | 95 O+------O------O-------*------O-------O------O-------O------O-------O lock_stat.&(&zone->lock)->rlock.contentions 7.2e+07 ++---------------------------------------------------------------+ | | 7e+07 ++ ...*......*.......*......*...... ...*.......*..... | 6.8e+07 *+.. *... . | | *......* 6.6e+07 ++ | | | 6.4e+07 ++ | | | 6.2e+07 ++ | 6e+07 ++ | | O O 5.8e+07 ++ O O O O | O O O | 5.6e+07 ++---------------------------O-----------------------------------+ lock_stat.&(&zone->lock)->rlock.contentions.get_page_from_freelist 7.4e+07 ++---------------------------*---------------------*-------------+ | ....*... . ...*... .. | 7.2e+07 *+.....*......*... *... . | | *......* 7e+07 ++ | | | 6.8e+07 ++ | | | 6.6e+07 ++ | | | 6.4e+07 ++ | | O O O 6.2e+07 ++ O O O | O O O | 6e+07 ++---------------------------O-----------------------------------+ lock_stat.&(&zone->lock)->rlock.contentions.__free_pages_ok 6.8e+07 ++---------------------------------------------------------------+ | ....*..... | 6.6e+07 *+.....*......*.......*......*......*......*... . | 6.4e+07 ++ *......* | | 6.2e+07 ++ | | | 6e+07 ++ | | | 5.8e+07 ++ | 5.6e+07 ++ | | O O O 5.4e+07 O+ O O O O | | O O | 5.2e+07 ++---------------------------------------------------------------+ lock_stat.slock-AF_INET.contentions 1.8e+06 ++---------------------------------------------------------------+ O O O O | 1.6e+06 ++ O O O O O O 1.4e+06 ++ | | | 1.2e+06 ++ | 1e+06 ++ | | | 800000 ++ | 600000 ++ | | | 400000 ++ | 200000 *+..... ....*......*......*......*....... ...*......* | *......*... *... | 0 ++---------------------------------------------------------------+ lock_stat.slock-AF_INET.contentions.lock_sock_nested 1.4e+06 ++---------------------------------------------------------------+ O O O O | 1.2e+06 ++ O O O O O O | | 1e+06 ++ | | | 800000 ++ | | | 600000 ++ | | | 400000 ++ | | | 200000 *+.....*......*.......*......*......*......*.......*......*......* | | 0 ++---------------------------------------------------------------+ lock_stat.slock-AF_INET.contentions.release_sock 350000 O+-----O---------------------O--------------O---------------------+ | O O O O O O 300000 ++ | | | 250000 ++ | | | 200000 ++ | | | 150000 ++ | | | 100000 ++ | | | 50000 ++ ...*...... ....*......*...... ....*......* *......*.......*... *... *... | 0 ++----------------------------------------------------------------+ lock_stat.slock-AF_INET.contentions.tcp_v4_rcv 1.8e+06 ++---------------------------------------------------------------+ O O O O | 1.6e+06 ++ O O O O O O 1.4e+06 ++ | | | 1.2e+06 ++ | 1e+06 ++ | | | 800000 ++ | 600000 ++ | | | 400000 ++ | 200000 *+..... ....*......*......*......*....... ...*......* | *......*... *... | 0 ++---------------------------------------------------------------+ lock_stat.rcu_node_1.contentions.rcu_process_callbacks 110000 ++----------------------------------------------------------------+ | | 105000 ++ O | | O | O O O 100000 ++ O O O | | O O | 95000 ++ | | | 90000 ++ .* | .... | | .*.......*......*..... ..*. | 85000 ++.... . .*...... .... | *. *....... .... *. | 80000 ++-----------------------------------*----------------------------+ lock_stat.slock-AF_INET/1.contentions 500000 ++---------------------------O--------------O---------------------+ O O O O O O O O 450000 ++ | 400000 ++ | | | 350000 ++ | 300000 ++ | | | 250000 ++ | 200000 ++ | | | 150000 ++ | 100000 ++ | | ....*...... | 50000 *+-----*-------*------*------*--------------*------*-------*------* lock_stat.slock-AF_INET/1.contentions.tcp_v4_rcv 500000 ++---------------------------O--------------O---------------------+ O O O O O O O O 450000 ++ | 400000 ++ | | | 350000 ++ | 300000 ++ | | | 250000 ++ | 200000 ++ | | | 150000 ++ | 100000 ++ | | ....*...... | 50000 *+-----*-------*------*------*--------------*------*-------*------* lock_stat.slock-AF_INET/1.contentions.release_sock 300000 ++----------------------------------------------------------------+ O O O O O | 250000 ++ O O O O O | | | | 200000 ++ | | | 150000 ++ | | | 100000 ++ | | | | | 50000 ++ ...*...... ....*......*...... ....*......* *......*.......*... *... *... | 0 ++----------------------------------------------------------------+ lock_stat.slock-AF_INET/1.contentions.lock_sock_nested 220000 ++----------------------------------------------------------------+ 200000 O+ O O O O O O O | | O O 180000 ++ | 160000 ++ | | | 140000 ++ | 120000 ++ | 100000 ++ | | | 80000 ++ | 60000 ++ | | | 40000 ++ ...*...... ....*......*...... ....*......* 20000 *+-----*-------*-------------*---------------------*--------------+ lock_stat.&rq->lock.contentions 300000 O+----------------------------------------------------------------+ | O O O O O | 250000 ++ O O O O | | | | 200000 ++ | | | 150000 ++ | | | 100000 ++ | | | | | 50000 ++ | *......*.......*......*......*.......*......*......*.......*......* 0 ++----------------------------------------------------------------+ lock_stat.&rq->lock.contentions.__schedule 200000 O+----------------------------------------------------------------+ 180000 ++ O O O O O O | | 160000 ++ | 140000 ++ | | O | 120000 ++ O O | 100000 ++ | 80000 ++ | | | 60000 ++ | 40000 ++ | | | 20000 *+.....*.......*......*......*.......*......*......*.......*......* 0 ++----------------------------------------------------------------+ lock_stat.&(&base->lock)->rlock.contentions 160000 ++----------------------------------------------------------------+ O O O O O 140000 ++ O O O O O | 120000 ++ | | | 100000 ++ | | | 80000 ++ | | | 60000 ++ | 40000 ++ | | | 20000 ++ | *...... ...*......*.......*......*......*.......*......* 0 ++-----*-------*--------------------------------------------------+ lock_stat.&(&base->lock)->rlock.contentions.lock_timer_base 300000 O+-----O---------------------O------------------------------------+ | O O O O O O O 250000 ++ | | | | | 200000 ++ | | | 150000 ++ | | | 100000 ++ | | | | | 50000 ++ | *......*.......*......*......*.......*......*......*.......*......* 0 ++----------------------------------------------------------------+ lock_stat.&(&base->lock)->rlock.contentions.run_timer_softirq 2200 ++------------------------------------------------------------------+ 2000 O+ O O O | | O O O O O O 1800 ++ | 1600 ++ | 1400 ++ | 1200 ++ | | | 1000 ++ | 800 ++ | 600 ++ | 400 ++ | | ....*...... ....*......*....... ...*.......| 200 *+......*......*... *... *... * 0 ++------------------------------------------------------------------+ lock_stat.&(&base->lock)->rlock.contentions.mod_timer 3000 ++------------------------------------------------------------------+ | | 2500 O+ O O O O O | O O O | | | 2000 ++ | | | 1500 ++ | | O | 1000 ++ | | | | | 500 ++ | *....... ....*......*.......*......*.......*......*.......* 0 ++------*------*----------------------------------------------------+ iostat.cpu.user 2.2 O+--------------------------------------------O----------------------+ | O O O O O O O | 2.1 ++ O 2 ++ | | | 1.9 ++ | 1.8 ++ | | | 1.7 ++ | 1.6 ++ | | | 1.5 ++ ....*......*....... ...*.......* 1.4 *+......*...... ....*... *.......*... | | *... | 1.3 ++-------------------------------------------------------------------+ iostat.cpu.system 95.6 ++------------------------------------------------------------------+ *....... ...*.......*..... ....*..... | 95.5 ++ *... . ...*... . | 95.4 ++ *.......*... *.......* | | 95.3 ++ | 95.2 ++ | | | 95.1 ++ | 95 ++ | | | 94.9 ++ | 94.8 ++ O O O O O O O O O O | 94.7 ++------------------------------------------------------------------+ And here is the bisect log: # bad: [e9a5cecac4145ba4a64827ac55728d33f5c8bb79] Merge 'drm/drm-fixes' into devel-hourly-2013092910 # good: [272b98c6455f00884f0350f775c5342358ebb73f] Linux 3.12-rc1 git bisect start 'e9a5cecac4145ba4a64827ac55728d33f5c8bb79' '272b98c6455f00884f0350f775c5342358ebb73f' '--' # bad: [654fdd041227d7de1594baa61c58f2c87bd0640f] Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip git bisect bad 654fdd041227d7de1594baa61c58f2c87bd0640f # good: [b75ff5e84bb6c2d43a8ec39b240c80f0543821f0] Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net git bisect good b75ff5e84bb6c2d43a8ec39b240c80f0543821f0 # good: [d8524ae9d6f492a9c6db9f4d89c5f9b8782fa2d5] Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux git bisect good d8524ae9d6f492a9c6db9f4d89c5f9b8782fa2d5 # good: [4a10c2ac2f368583138b774ca41fac4207911983] Linux 3.12-rc2 git bisect good 4a10c2ac2f368583138b774ca41fac4207911983 # good: [a153e67bda3639a46edac6205610ae63c0fdea4c] Merge branch 'akpm' (patches from Andrew Morton) git bisect good a153e67bda3639a46edac6205610ae63c0fdea4c # good: [fa7315871046b9a4c48627905691dbde57e51033] perf: Fix capabilities bitfield compatibility in 'struct perf_event_mmap_page' git bisect good fa7315871046b9a4c48627905691dbde57e51033 # bad: [82dfaa58a79c121be3611ce549dec806f2e6004f] Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip git bisect bad 82dfaa58a79c121be3611ce549dec806f2e6004f # good: [bdc5663fa14de657f24080ee959670d49c8dd094] Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip git bisect good bdc5663fa14de657f24080ee959670d49c8dd094 # good: [3029ede39373c368f402a76896600d85a4f7121b] sched/balancing: Fix 'local->avg_load > busiest->avg_load' case in fix_small_imbalance() git bisect good 3029ede39373c368f402a76896600d85a4f7121b # bad: [7e3115ef5149fc502e3a2e80719dba54a8e7409d] sched/balancing: Fix cfs_rq->task_h_load calculation git bisect bad 7e3115ef5149fc502e3a2e80719dba54a8e7409d # first bad commit: [7e3115ef5149fc502e3a2e80719dba54a8e7409d] sched/balancing: Fix cfs_rq->task_h_load calculation Please feel free to ask more data. Thanks. --yliu > > Signed-off-by: Vladimir Davydov <vdavydov(a)parallels.com> > Reviewed-by: Paul Turner <pjt(a)google.com> > Signed-off-by: Peter Zijlstra <peterz(a)infradead.org> > Link: http://lkml.kernel.org/r/1379173186-11944-1-git-send-email-vdavydov@paral... > Signed-off-by: Ingo Molnar <mingo(a)kernel.org> > --- > kernel/sched/fair.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c > index 2aedacc..7c70201 100644 > --- a/kernel/sched/fair.c > +++ b/kernel/sched/fair.c > @@ -4242,7 +4242,7 @@ static void update_cfs_rq_h_load(struct cfs_rq *cfs_rq) > } > > if (!se) { > - cfs_rq->h_load = rq->avg.load_avg_contrib; > + cfs_rq->h_load = cfs_rq->runnable_load_avg; > cfs_rq->last_h_load_update = now; > } > > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo(a)vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/

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