On 2014-05-12 14:25, Adrian Chadd wrote: > On 12 May 2014 10:35, Allan Jude <freebsd@allanjude.com> wrote: > > 私のシステムは以下のとおりです: > > > > hw.model: Intel(R) Xeon(R) CPU E3-1220 v3 @ 3.10GHz > > hw.ncpu: 4 > > > > http://ark.intel.com/products/75052 > > > > dev.cpu.0.%desc: ACPI CPU > > dev.cpu.0.%driver: cpu > > dev.cpu.0.%location: handle=\_PR_.CPU0 > > dev.cpu.0.%pnpinfo: _HID=none _UID=0 > > dev.cpu.0.%parent: acpi0 > > dev.cpu.0.freq: 3100 > > dev.cpu.0.freq_levels: 3101/80000 3100/80000 2900/72713 2800/69558 > > 2600/62669 2400/56794 2300/53935 2100/47673 1900/42370 1800/39795 > > 1600/34136 1500/31729 1300/26432 1137/23128 1100/21994 1000/19851 > > 875/17369 800/15113 700/13223 600/11334 500/9445 400/7556 300/5667 > > 200/3778 100/1889 > > dev.cpu.0.cx_supported: C1/1/1 C2/2/148 > > dev.cpu.0.cx_lowest: C8 > > dev.cpu.0.cx_usage: 9.01% 90.98% last 807us > > dev.cpu.1.%desc: ACPI CPU > > dev.cpu.1.%driver: cpu > > dev.cpu.1.%location: handle=\_PR_.CPU1 > > dev.cpu.1.%pnpinfo: _HID=none _UID=0 > > dev.cpu.1.%parent: acpi0 > > dev.cpu.1.cx_supported: C1/1/1 C2/2/148 > > dev.cpu.1.cx_lowest: C8 > > dev.cpu.1.cx_usage: 11.70% 88.29% last 21303us > > dev.cpu.2.%desc: ACPI CPU > > dev.cpu.2.%driver: cpu > > dev.cpu.2.%location: handle=\_PR_.CPU2 > > dev.cpu.2.%pnpinfo: _HID=none _UID=0 > > dev.cpu.2.%parent: acpi0 > > dev.cpu.2.cx_supported: C1/1/1 C2/2/148 > > dev.cpu.2.cx_lowest: C8 > > dev.cpu.2.cx_usage: 15.17% 84.82% last 22987us > > dev.cpu.3.%desc: ACPI CPU > > dev.cpu.3.%driver: cpu > > dev.cpu.3.%location: handle=\_PR_.CPU3 > > dev.cpu.3.%pnpinfo: _HID=none _UID=0 > > dev.cpu.3.%parent: acpi0 > > dev.cpu.3.cx_supported: C1/1/1 C2/2/148 > > dev.cpu.3.cx_lowest: C8 > > dev.cpu.3.cx_usage: 11.74% 88.25% last 6073us > > > > それで ACPI が C1 と C2 だけを外に出してるんです． > > > Intel の仕様書(11 頁)によれば，このプロセッサは C1, C1E, C3, C6 および C7 を > > サポートしています． > > > > 上記の sysctl のダンプでは C1 と C2 だけであると示している．C2 は事実上 C3 > > であるなら驚きですが. > > > > http://www.intel.com/content/dam/www/public/us/en/documents/datasheets/xeon-e3-1200v3-vol-1-datasheet.pdf > > そのケースでは C2/3/xxx と言われています． > > それをより深いスリープ状態に落ちるのを見るのを終えるチャンスだと思う． > intel-pcm のインストールを試みてください;kldload cpuctl; run pcm.x 1．低い > CPU 状態に入っていくか見てください． > > > > > Haswell で導入された新しい Cx 状態--これは明かに C10 と同じくらいに高いが-- > > をサポートするのはどうだろう． > > ACPI 経由の丸出しのそのようなものが利用できるかは知らない．今はできない > MWAIT で実行できるのようなたくさんのかわいいものがあるのを知っているが，確実 > に低レベルのスリープ状態に移行するべきだと思う． > > intel-pcm を実行して見てみようじゃないか． > > Thanks, > > > > -a 手元のコンフィギュレーション: # pcm.x 10 Intel(r) Performance Counter Monitor V2.6 (2013-11-04 13:43:31 +0100 ID=db05e43) Copyright (c) 2009-2013 Intel Corporation Number of physical cores: 4 Number of logical cores: 4 Threads (logical cores) per physical core: 1 Num sockets: 1 Core PMU (perfmon) version: 3 Number of core PMU generic (programmable) counters: 8 Width of generic (programmable) counters: 48 bits Number of core PMU fixed counters: 3 Width of fixed counters: 48 bits Nominal core frequency: 3100000000 Hz Package thermal spec power: 80 Watt; Package minimum power: 0 Watt; Package maximum power: 0 Watt; Detected Intel(R) Xeon(R) CPU E3-1220 v3 @ 3.10GHz "Intel(r) microarchitecture codename Haswell" EXEC : instructions per nominal CPU cycle IPC : instructions per CPU cycle FREQ : relation to nominal CPU frequency='unhalted clock ticks'/'invariant timer ticks' (includes Intel Turbo Boost) AFREQ : relation to nominal CPU frequency while in active state (not in power-saving C state)='unhalted clock ticks'/'invariant timer ticks while in C0-state' (includes Intel Turbo Boost) L3MISS: L3 cache misses L2MISS: L2 cache misses (including other core's L2 cache *hits*) L3HIT : L3 cache hit ratio (0.00-1.00) L2HIT : L2 cache hit ratio (0.00-1.00) L3CLK : ratio of CPU cycles lost due to L3 cache misses (0.00-1.00), in some cases could be >1.0 due to a higher memory latency L2CLK : ratio of CPU cycles lost due to missing L2 cache but still hitting L3 cache (0.00-1.00) READ : bytes read from memory controller (in GBytes) WRITE : bytes written to memory controller (in GBytes) TEMP : Temperature reading in 1 degree Celsius relative to the TjMax temperature (thermal headroom): 0 corresponds to the max temperature Core (SKT) | EXEC | IPC | FREQ | AFREQ | L3MISS | L2MISS | L3HIT | L2HIT | L3CLK | L2CLK | READ | WRITE | TEMP 0 0 0.00 0.74 0.00 0.76 39 K 120 K 0.67 0.66 0.13 0.09 N/A N/A 74 1 0 0.00 0.72 0.00 0.75 17 K 80 K 0.79 0.71 0.07 0.10 N/A N/A 76 2 0 0.00 0.62 0.00 0.61 8037 33 K 0.76 0.58 0.08 0.08 N/A N/A 76 3 0 0.00 0.72 0.00 0.76 18 K 98 K 0.81 0.70 0.07 0.10 N/A N/A 76 ------------------------------------------------------------------------------------------------------------------- SKT 0 0.00 0.72 0.00 0.74 83 K 332 K 0.75 0.68 0.09 0.09 0.38 0.01 74 ------------------------------------------------------------------------------------------------------------------- TOTAL * 0.00 0.72 0.00 0.74 83 K 332 K 0.75 0.68 0.09 0.09 0.38 0.01 N/A Instructions retired: 118 M ; Active cycles: 165 M ; Time (TSC): 30 Gticks ; C0 (active,non-halted) core residency: 0.18 % C1 core residency: 99.82 %; C3 core residency: 0.00 %; C6 core residency: 0.00 %; C7 core residency: 0.00 %; C2 package residency: 0.00 %; C3 package residency: 0.00 %; C6 package residency: 0.00 %; C7 package residency: 0.00 %; PHYSICAL CORE IPC : 0.72 => corresponds to 17.93 % utilization for cores in active state Instructions per nominal CPU cycle: 0.00 => corresponds to 0.02 % core utilization over time interval ---------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------- SKT 0 package consumed 68.42 Joules ---------------------------------------------------------------------------------------------- TOTAL: 68.42 Joules 次いで高い Cx 状態を有効にすれば(powerd やその諸々無し): # sysctl hw.acpi.cpu.cx_lowest=c8 hw.acpi.cpu.cx_lowest: C1 -> C8 # pcm.x 10 Intel(r) Performance Counter Monitor V2.6 (2013-11-04 13:43:31 +0100 ID=db05e43) Copyright (c) 2009-2013 Intel Corporation Number of physical cores: 4 Number of logical cores: 4 Threads (logical cores) per physical core: 1 Num sockets: 1 Core PMU (perfmon) version: 3 Number of core PMU generic (programmable) counters: 8 Width of generic (programmable) counters: 48 bits Number of core PMU fixed counters: 3 Width of fixed counters: 48 bits Nominal core frequency: 3100000000 Hz Package thermal spec power: 80 Watt; Package minimum power: 0 Watt; Package maximum power: 0 Watt; Detected Intel(R) Xeon(R) CPU E3-1220 v3 @ 3.10GHz "Intel(r) microarchitecture codename Haswell" EXEC : instructions per nominal CPU cycle IPC : instructions per CPU cycle FREQ : relation to nominal CPU frequency='unhalted clock ticks'/'invariant timer ticks' (includes Intel Turbo Boost) AFREQ : relation to nominal CPU frequency while in active state (not in power-saving C state)='unhalted clock ticks'/'invariant timer ticks while in C0-state' (includes Intel Turbo Boost) L3MISS: L3 cache misses L2MISS: L2 cache misses (including other core's L2 cache *hits*) L3HIT : L3 cache hit ratio (0.00-1.00) L2HIT : L2 cache hit ratio (0.00-1.00) L3CLK : ratio of CPU cycles lost due to L3 cache misses (0.00-1.00), in some cases could be >1.0 due to a higher memory latency L2CLK : ratio of CPU cycles lost due to missing L2 cache but still hitting L3 cache (0.00-1.00) READ : bytes read from memory controller (in GBytes) WRITE : bytes written to memory controller (in GBytes) TEMP : Temperature reading in 1 degree Celsius relative to the TjMax temperature (thermal headroom): 0 corresponds to the max temperature Core (SKT) | EXEC | IPC | FREQ | AFREQ | L3MISS | L2MISS | L3HIT | L2HIT | L3CLK | L2CLK | READ | WRITE | TEMP 0 0 0.00 0.11 0.00 0.99 611 K 629 K 0.03 0.02 1.89 0.01 N/A N/A 73 1 0 0.00 0.19 0.00 0.99 152 K 169 K 0.10 0.04 1.36 0.04 N/A N/A 76 2 0 0.00 0.20 0.00 0.99 153 K 171 K 0.10 0.04 1.29 0.04 N/A N/A 77 3 0 0.00 0.20 0.00 1.00 159 K 180 K 0.12 0.04 1.14 0.03 N/A N/A 76 ------------------------------------------------------------------------------------------------------------------- SKT 0 0.00 0.16 0.00 0.99 1077 K 1150 K 0.06 0.03 1.55 0.03 0.14 0.01 72 ------------------------------------------------------------------------------------------------------------------- TOTAL * 0.00 0.16 0.00 0.99 1077 K 1150 K 0.06 0.03 1.55 0.03 0.14 0.01 N/A Instructions retired: 19 M ; Active cycles: 125 M ; Time (TSC): 31 Gticks ; C0 (active,non-halted) core residency: 0.10 % C1 core residency: 1.85 %; C3 core residency: 0.00 %; C6 core residency: 0.00 %; C7 core residency: 98.05 %; C2 package residency: 8.10 %; C3 package residency: 7.46 %; C6 package residency: 79.20 %; C7 package residency: 0.00 %; PHYSICAL CORE IPC : 0.16 => corresponds to 3.96 % utilization for cores in active state Instructions per nominal CPU cycle: 0.00 => corresponds to 0.00 % core utilization over time interval ---------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------- SKT 0 package consumed 22.77 Joules ---------------------------------------------------------------------------------------------- TOTAL: 22.77 Joules C6 および C7 に多くの時間を費していることを想像してみてください． さらに 2〜3 のマシンの結果を掌握しませんか．
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