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Message-ID: <20140626021832.GR4603@linux.vnet.ibm.com>
Date: Wed, 25 Jun 2014 19:18:33 -0700
From: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To: Fengguang Wu <fengguang.wu@...el.com>
Cc: Dave Hansen <dave.hansen@...el.com>,
LKML <linux-kernel@...r.kernel.org>, lkp@...org,
Jet Chen <jet.chen@...el.com>
Subject: Re: [rcu] e552592e038: +39.2% vm-scalability.throughput, +19.7%
turbostat.Pkg_W
On Thu, Jun 26, 2014 at 09:42:19AM +0800, Fengguang Wu wrote:
> Hi Paul,
>
> We noticed the below changes on
>
> git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git urgent.2014.06.21a
> commit e552592e0383bc72e35eb21a9fabd84ad873cff1 ("rcu: Reduce overhead of cond_resched() checks for RCU")
This one is also obsolete, but the good news is that the replacement
commit 4a81e8328d37 (Reduce overhead of cond_resched() checks for RCU)
is quite similar, so here is hoping for similar results from it.
Thanx, Paul
> Test case: brickland3/vm-scalability/300s-anon-w-seq-mt-64G
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 89766370 ~ 6% +39.2% 1.25e+08 ~ 9% TOTAL vm-scalability.throughput
> 1.317e+09 ~ 8% -45.2% 7.21e+08 ~10% TOTAL cpuidle.C6-IVT-4S.time
> 9 ~ 6% +58.8% 15 ~ 5% TOTAL vmstat.procs.r
> 12.27 ~14% +44.7% 17.74 ~12% TOTAL turbostat.%c1
> 20538 ~ 4% -21.3% 16155 ~ 4% TOTAL cpuidle.C6-IVT-4S.usage
> 77.66 ~ 2% -15.0% 65.98 ~ 5% TOTAL turbostat.%c6
> 260 ~ 2% -16.4% 217 ~ 4% TOTAL vmstat.memory.buff
> 51920 ~ 7% -14.3% 44489 ~ 5% TOTAL numa-meminfo.node0.PageTables
> 53822 ~ 5% -15.6% 45404 ~ 6% TOTAL proc-vmstat.nr_page_table_pages
> 215196 ~ 5% -15.7% 181409 ~ 6% TOTAL meminfo.PageTables
> 52182 ~ 4% -15.2% 44271 ~ 6% TOTAL proc-vmstat.nr_anon_transparent_hugepages
> 12881 ~ 7% -13.4% 11150 ~ 5% TOTAL numa-vmstat.node0.nr_page_table_pages
> 1.068e+08 ~ 4% -15.2% 90492587 ~ 6% TOTAL meminfo.AnonHugePages
> 26983682 ~ 4% -14.5% 23071571 ~ 6% TOTAL proc-vmstat.nr_anon_pages
> 1.079e+08 ~ 4% -14.5% 92289854 ~ 6% TOTAL meminfo.AnonPages
> 1.083e+08 ~ 4% -14.2% 92897630 ~ 6% TOTAL meminfo.Active(anon)
> 1.084e+08 ~ 4% -14.2% 92970821 ~ 6% TOTAL meminfo.Active
> 27067517 ~ 4% -14.2% 23232055 ~ 6% TOTAL proc-vmstat.nr_active_anon
> 52565 ~ 3% -12.0% 46273 ~ 3% TOTAL proc-vmstat.nr_shmem
> 52499 ~ 3% -12.0% 46215 ~ 3% TOTAL proc-vmstat.nr_inactive_anon
> 214447 ~ 3% -10.5% 191862 ~ 2% TOTAL meminfo.Shmem
> 214197 ~ 3% -10.5% 191636 ~ 2% TOTAL meminfo.Inactive(anon)
> 2779 ~13% -53.5% 1291 ~19% TOTAL time.involuntary_context_switches
> 1156 ~ 8% +82.3% 2108 ~ 9% TOTAL time.percent_of_cpu_this_job_got
> 11.58 ~10% -44.4% 6.45 ~ 9% TOTAL time.elapsed_time
> 1008 ~ 5% +79.5% 1810 ~ 7% TOTAL time.voluntary_context_switches
> 9.23 ~ 8% +72.8% 15.95 ~ 8% TOTAL turbostat.%c0
> 12679 ~ 8% +70.8% 21659 ~ 9% TOTAL vmstat.system.in
> 145 ~ 7% +60.6% 234 ~ 8% TOTAL vmstat.io.bo
> 3721 ~ 7% +35.2% 5029 ~ 8% TOTAL vmstat.system.cs
> ~ 1% +26.7% ~ 5% TOTAL turbostat.Cor_W
> ~ 2% +21.2% ~ 3% TOTAL turbostat.RAM_W
> ~ 1% +19.7% ~ 4% TOTAL turbostat.Pkg_W
>
>
> All test cases:
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 89766370 ~ 6% +39.2% 1.25e+08 ~ 9% brickland3/vm-scalability/300s-anon-w-seq-mt-64G
> 89766370 ~ 6% +39.2% 1.25e+08 ~ 9% TOTAL vm-scalability.throughput
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 0.36 ~ 1% -9.8% 0.32 ~ 2% lkp-nex05/will-it-scale/open1
> 0.36 ~ 1% -9.8% 0.32 ~ 2% TOTAL will-it-scale.scalability
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 466616 ~ 1% -2.6% 454267 ~ 1% lkp-nex05/will-it-scale/open1
> 511556 ~ 0% -1.3% 504762 ~ 0% lkp-snb01/will-it-scale/signal1
> 978172 ~ 0% -2.0% 959029 ~ 0% TOTAL will-it-scale.per_process_ops
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 1381706 ~ 1% +2.3% 1413190 ~ 0% lkp-snb01/will-it-scale/futex2
> 299558 ~ 0% -1.8% 294312 ~ 0% lkp-snb01/will-it-scale/signal1
> 1681264 ~ 1% +1.6% 1707503 ~ 0% TOTAL will-it-scale.per_thread_ops
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 84771 ~ 2% +575.2% 572390 ~ 1% lkp-nex05/will-it-scale/open1
> 84771 ~ 2% +575.2% 572390 ~ 1% TOTAL slabinfo.kmalloc-256.active_objs
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 2656 ~ 2% +573.8% 17896 ~ 1% lkp-nex05/will-it-scale/open1
> 2656 ~ 2% +573.8% 17896 ~ 1% TOTAL slabinfo.kmalloc-256.num_slabs
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 85011 ~ 2% +573.7% 572697 ~ 1% lkp-nex05/will-it-scale/open1
> 85011 ~ 2% +573.7% 572697 ~ 1% TOTAL slabinfo.kmalloc-256.num_objs
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 2656 ~ 2% +573.8% 17896 ~ 1% lkp-nex05/will-it-scale/open1
> 2656 ~ 2% +573.8% 17896 ~ 1% TOTAL slabinfo.kmalloc-256.active_slabs
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 1533310 ~ 2% -83.7% 250652 ~ 1% lkp-nex05/will-it-scale/open1
> 289790 ~ 4% -67.2% 94913 ~ 4% lkp-snb01/will-it-scale/futex2
> 204559 ~ 4% -62.6% 76449 ~ 7% lkp-snb01/will-it-scale/signal1
> 2027660 ~ 3% -79.2% 422015 ~ 3% TOTAL softirqs.RCU
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 47388 ~ 5% +147.5% 117277 ~ 1% lkp-nex05/will-it-scale/open1
> 47388 ~ 5% +147.5% 117277 ~ 1% TOTAL numa-meminfo.node0.SUnreclaim
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 11836 ~ 5% +149.4% 29520 ~ 2% lkp-nex05/will-it-scale/open1
> 11836 ~ 5% +149.4% 29520 ~ 2% TOTAL numa-vmstat.node0.nr_slab_unreclaimable
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 97325 ~ 0% +125.2% 219188 ~ 1% lkp-nex05/will-it-scale/open1
> 97325 ~ 0% +125.2% 219188 ~ 1% TOTAL meminfo.SUnreclaim
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 24304 ~ 0% +125.0% 54686 ~ 0% lkp-nex05/will-it-scale/open1
> 24304 ~ 0% +125.0% 54686 ~ 0% TOTAL proc-vmstat.nr_slab_unreclaimable
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 6364 ~ 8% +117.8% 13864 ~ 3% lkp-nex05/will-it-scale/open1
> 6364 ~ 8% +117.8% 13864 ~ 3% TOTAL numa-vmstat.node1.nr_slab_unreclaimable
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 25487 ~ 8% +115.7% 54988 ~ 4% lkp-nex05/will-it-scale/open1
> 25487 ~ 8% +115.7% 54988 ~ 4% TOTAL numa-meminfo.node1.SUnreclaim
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 63365 ~ 5% +110.5% 133379 ~ 1% lkp-nex05/will-it-scale/open1
> 63365 ~ 5% +110.5% 133379 ~ 1% TOTAL numa-meminfo.node0.Slab
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 6335 ~11% +83.5% 11625 ~ 4% lkp-nex05/will-it-scale/open1
> 6335 ~11% +83.5% 11625 ~ 4% TOTAL numa-vmstat.node3.nr_slab_unreclaimable
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 25370 ~11% +82.1% 46193 ~ 5% lkp-nex05/will-it-scale/open1
> 25370 ~11% +82.1% 46193 ~ 5% TOTAL numa-meminfo.node3.SUnreclaim
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 140861 ~ 0% +86.5% 262647 ~ 1% lkp-nex05/will-it-scale/open1
> 140861 ~ 0% +86.5% 262647 ~ 1% TOTAL meminfo.Slab
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 1.317e+09 ~ 8% -45.2% 7.21e+08 ~10% brickland3/vm-scalability/300s-anon-w-seq-mt-64G
> 1.317e+09 ~ 8% -45.2% 7.21e+08 ~10% TOTAL cpuidle.C6-IVT-4S.time
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 38627 ~ 5% +77.8% 68673 ~ 5% lkp-nex05/will-it-scale/open1
> 38627 ~ 5% +77.8% 68673 ~ 5% TOTAL numa-meminfo.node1.Slab
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 1.10 ~ 5% +70.3% 1.88 ~ 0% lkp-nex05/will-it-scale/open1
> 1.10 ~ 5% +70.3% 1.88 ~ 0% TOTAL perf-profile.cpu-cycles.setup_object.isra.47.__slab_alloc.kmem_cache_alloc.get_empty_filp.path_openat
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 2.54 ~ 6% -37.7% 1.58 ~ 5% lkp-snb01/will-it-scale/futex2
> 2.54 ~ 6% -37.7% 1.58 ~ 5% TOTAL perf-profile.cpu-cycles.get_futex_key.futex_wait_setup.futex_wait.do_futex.sys_futex
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 9 ~ 6% +58.8% 15 ~ 5% brickland3/vm-scalability/300s-anon-w-seq-mt-64G
> 9 ~ 6% +58.8% 15 ~ 5% TOTAL vmstat.procs.r
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 12.27 ~14% +44.7% 17.74 ~12% brickland3/vm-scalability/300s-anon-w-seq-mt-64G
> 12.27 ~14% +44.7% 17.74 ~12% TOTAL turbostat.%c1
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 661578 ~ 2% -33.4% 440676 ~ 0% lkp-nex05/will-it-scale/open1
> 661578 ~ 2% -33.4% 440676 ~ 0% TOTAL cpuidle.C3-NHM.usage
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 39783 ~ 9% +50.5% 59862 ~ 5% lkp-nex05/will-it-scale/open1
> 39783 ~ 9% +50.5% 59862 ~ 5% TOTAL numa-meminfo.node3.Slab
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 2.03 ~ 8% +34.1% 2.73 ~ 2% lkp-nex05/will-it-scale/open1
> 2.03 ~ 8% +34.1% 2.73 ~ 2% TOTAL perf-profile.cpu-cycles.rcu_nocb_kthread.kthread.ret_from_fork
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 20538 ~ 4% -21.3% 16155 ~ 4% brickland3/vm-scalability/300s-anon-w-seq-mt-64G
> 20538 ~ 4% -21.3% 16155 ~ 4% TOTAL cpuidle.C6-IVT-4S.usage
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 1.07 ~ 4% -17.3% 0.88 ~ 8% lkp-nex05/will-it-scale/open1
> 1.07 ~ 4% -17.3% 0.88 ~ 8% TOTAL perf-profile.cpu-cycles.__alloc_fd.get_unused_fd_flags.do_sys_open.sys_open.system_call_fastpath
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 77.66 ~ 2% -15.0% 65.98 ~ 5% brickland3/vm-scalability/300s-anon-w-seq-mt-64G
> 77.66 ~ 2% -15.0% 65.98 ~ 5% TOTAL turbostat.%c6
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 0.96 ~ 3% -14.8% 0.82 ~ 5% lkp-snb01/will-it-scale/futex2
> 0.96 ~ 3% -14.8% 0.82 ~ 5% TOTAL perf-profile.cpu-cycles.put_page.get_futex_key.futex_wait_setup.futex_wait.do_futex
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 1.08 ~ 4% +22.4% 1.33 ~ 2% lkp-nex05/will-it-scale/open1
> 1.08 ~ 4% +22.4% 1.33 ~ 2% TOTAL perf-profile.cpu-cycles.memset.get_empty_filp.path_openat.do_filp_open.do_sys_open
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 260 ~ 2% -16.4% 217 ~ 4% brickland3/vm-scalability/300s-anon-w-seq-mt-64G
> 260 ~ 2% -16.4% 217 ~ 4% TOTAL vmstat.memory.buff
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 51920 ~ 7% -14.3% 44489 ~ 5% brickland3/vm-scalability/300s-anon-w-seq-mt-64G
> 51920 ~ 7% -14.3% 44489 ~ 5% TOTAL numa-meminfo.node0.PageTables
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 53822 ~ 5% -15.6% 45404 ~ 6% brickland3/vm-scalability/300s-anon-w-seq-mt-64G
> 53822 ~ 5% -15.6% 45404 ~ 6% TOTAL proc-vmstat.nr_page_table_pages
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 215196 ~ 5% -15.7% 181409 ~ 6% brickland3/vm-scalability/300s-anon-w-seq-mt-64G
> 215196 ~ 5% -15.7% 181409 ~ 6% TOTAL meminfo.PageTables
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 52182 ~ 4% -15.2% 44271 ~ 6% brickland3/vm-scalability/300s-anon-w-seq-mt-64G
> 52182 ~ 4% -15.2% 44271 ~ 6% TOTAL proc-vmstat.nr_anon_transparent_hugepages
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 12881 ~ 7% -13.4% 11150 ~ 5% brickland3/vm-scalability/300s-anon-w-seq-mt-64G
> 12881 ~ 7% -13.4% 11150 ~ 5% TOTAL numa-vmstat.node0.nr_page_table_pages
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 1.068e+08 ~ 4% -15.2% 90492587 ~ 6% brickland3/vm-scalability/300s-anon-w-seq-mt-64G
> 1.068e+08 ~ 4% -15.2% 90492587 ~ 6% TOTAL meminfo.AnonHugePages
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 26983682 ~ 4% -14.5% 23071571 ~ 6% brickland3/vm-scalability/300s-anon-w-seq-mt-64G
> 26983682 ~ 4% -14.5% 23071571 ~ 6% TOTAL proc-vmstat.nr_anon_pages
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 1.83 ~ 6% +19.3% 2.18 ~ 5% lkp-nex05/will-it-scale/open1
> 1.83 ~ 6% +19.3% 2.18 ~ 5% TOTAL perf-profile.cpu-cycles.get_empty_filp.path_openat.do_filp_open.do_sys_open.sys_open
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 1.079e+08 ~ 4% -14.5% 92289854 ~ 6% brickland3/vm-scalability/300s-anon-w-seq-mt-64G
> 1.079e+08 ~ 4% -14.5% 92289854 ~ 6% TOTAL meminfo.AnonPages
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 254457 ~ 2% -12.2% 223290 ~ 1% lkp-nex05/will-it-scale/open1
> 254457 ~ 2% -12.2% 223290 ~ 1% TOTAL softirqs.SCHED
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 1.083e+08 ~ 4% -14.2% 92897630 ~ 6% brickland3/vm-scalability/300s-anon-w-seq-mt-64G
> 1.083e+08 ~ 4% -14.2% 92897630 ~ 6% TOTAL meminfo.Active(anon)
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 1.084e+08 ~ 4% -14.2% 92970821 ~ 6% brickland3/vm-scalability/300s-anon-w-seq-mt-64G
> 1.084e+08 ~ 4% -14.2% 92970821 ~ 6% TOTAL meminfo.Active
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 27067517 ~ 4% -14.2% 23232055 ~ 6% brickland3/vm-scalability/300s-anon-w-seq-mt-64G
> 27067517 ~ 4% -14.2% 23232055 ~ 6% TOTAL proc-vmstat.nr_active_anon
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 52565 ~ 3% -12.0% 46273 ~ 3% brickland3/vm-scalability/300s-anon-w-seq-mt-64G
> 52565 ~ 3% -12.0% 46273 ~ 3% TOTAL proc-vmstat.nr_shmem
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 52499 ~ 3% -12.0% 46215 ~ 3% brickland3/vm-scalability/300s-anon-w-seq-mt-64G
> 52499 ~ 3% -12.0% 46215 ~ 3% TOTAL proc-vmstat.nr_inactive_anon
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 214447 ~ 3% -10.5% 191862 ~ 2% brickland3/vm-scalability/300s-anon-w-seq-mt-64G
> 214447 ~ 3% -10.5% 191862 ~ 2% TOTAL meminfo.Shmem
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 214197 ~ 3% -10.5% 191636 ~ 2% brickland3/vm-scalability/300s-anon-w-seq-mt-64G
> 214197 ~ 3% -10.5% 191636 ~ 2% TOTAL meminfo.Inactive(anon)
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 681017 ~ 0% +10.3% 751298 ~ 0% lkp-nex05/will-it-scale/open1
> 681017 ~ 0% +10.3% 751298 ~ 0% TOTAL numa-meminfo.node0.MemUsed
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 2779 ~13% -53.5% 1291 ~19% brickland3/vm-scalability/300s-anon-w-seq-mt-64G
> 65403 ~ 4% -10.8% 58332 ~ 0% lkp-nex05/will-it-scale/open1
> 9638 ~ 2% +109.9% 20234 ~ 1% lkp-snb01/will-it-scale/futex2
> 10665 ~ 2% +103.8% 21733 ~ 2% lkp-snb01/will-it-scale/signal1
> 88486 ~ 4% +14.8% 101591 ~ 1% TOTAL time.involuntary_context_switches
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 1156 ~ 8% +82.3% 2108 ~ 9% brickland3/vm-scalability/300s-anon-w-seq-mt-64G
> 1156 ~ 8% +82.3% 2108 ~ 9% TOTAL time.percent_of_cpu_this_job_got
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 11.58 ~10% -44.4% 6.45 ~ 9% brickland3/vm-scalability/300s-anon-w-seq-mt-64G
> 11.58 ~10% -44.4% 6.45 ~ 9% TOTAL time.elapsed_time
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 1008 ~ 5% +79.5% 1810 ~ 7% brickland3/vm-scalability/300s-anon-w-seq-mt-64G
> 1008 ~ 5% +79.5% 1810 ~ 7% TOTAL time.voluntary_context_switches
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 9.23 ~ 8% +72.8% 15.95 ~ 8% brickland3/vm-scalability/300s-anon-w-seq-mt-64G
> 9.23 ~ 8% +72.8% 15.95 ~ 8% TOTAL turbostat.%c0
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 12679 ~ 8% +70.8% 21659 ~ 9% brickland3/vm-scalability/300s-anon-w-seq-mt-64G
> 12679 ~ 8% +70.8% 21659 ~ 9% TOTAL vmstat.system.in
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 145 ~ 7% +60.6% 234 ~ 8% brickland3/vm-scalability/300s-anon-w-seq-mt-64G
> 145 ~ 7% +60.6% 234 ~ 8% TOTAL vmstat.io.bo
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> 3721 ~ 7% +35.2% 5029 ~ 8% brickland3/vm-scalability/300s-anon-w-seq-mt-64G
> 5805 ~ 2% -55.9% 2563 ~ 0% lkp-nex05/will-it-scale/open1
> 897 ~ 1% +10.8% 994 ~ 1% lkp-snb01/will-it-scale/futex2
> 908 ~ 0% +11.7% 1014 ~ 0% lkp-snb01/will-it-scale/signal1
> 11332 ~ 3% -15.3% 9601 ~ 4% TOTAL vmstat.system.cs
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> ~ 1% +26.7% ~ 5% brickland3/vm-scalability/300s-anon-w-seq-mt-64G
> ~ 1% +26.7% ~ 5% TOTAL turbostat.Cor_W
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> ~ 2% +21.2% ~ 3% brickland3/vm-scalability/300s-anon-w-seq-mt-64G
> ~ 2% +21.2% ~ 3% TOTAL turbostat.RAM_W
>
> v3.16-rc1 e552592e0383bc72e35eb21a9
> --------------- -------------------------
> ~ 1% +19.7% ~ 4% brickland3/vm-scalability/300s-anon-w-seq-mt-64G
> ~ 1% +19.7% ~ 4% TOTAL turbostat.Pkg_W
>
>
> Legend:
> ~XX% - stddev percent
> [+-]XX% - change percent
>
>
> vmstat.system.cs
>
> 6000 *+-*------*--*-------------------------------------------------------+
> | *. *... .*.. |
> 5500 ++ *. * |
> | |
> 5000 ++ |
> | |
> 4500 ++ |
> | |
> 4000 ++ |
> | |
> 3500 ++ |
> | |
> 3000 ++ |
> | |
> 2500 O+-O---O--O--O--O---O--O--O---O--O--O--O---O--O--O---O--O--O--O---O--O
>
>
> [*] 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,
> Fengguang
>
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