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195 lines
5.6 KiB
195 lines
5.6 KiB
Kernel driver coretemp |
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====================== |
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Supported chips: |
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* All Intel Core family |
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Prefix: 'coretemp' |
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CPUID: family 0x6, models |
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- 0xe (Pentium M DC), 0xf (Core 2 DC 65nm), |
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- 0x16 (Core 2 SC 65nm), 0x17 (Penryn 45nm), |
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- 0x1a (Nehalem), 0x1c (Atom), 0x1e (Lynnfield), |
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- 0x26 (Tunnel Creek Atom), 0x27 (Medfield Atom), |
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- 0x36 (Cedar Trail Atom) |
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Datasheet: |
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Intel 64 and IA-32 Architectures Software Developer's Manual |
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Volume 3A: System Programming Guide |
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http://softwarecommunity.intel.com/Wiki/Mobility/720.htm |
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Author: Rudolf Marek |
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Description |
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----------- |
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This driver permits reading the DTS (Digital Temperature Sensor) embedded |
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inside Intel CPUs. This driver can read both the per-core and per-package |
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temperature using the appropriate sensors. The per-package sensor is new; |
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as of now, it is present only in the SandyBridge platform. The driver will |
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show the temperature of all cores inside a package under a single device |
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directory inside hwmon. |
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Temperature is measured in degrees Celsius and measurement resolution is |
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1 degree C. Valid temperatures are from 0 to TjMax degrees C, because |
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the actual value of temperature register is in fact a delta from TjMax. |
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Temperature known as TjMax is the maximum junction temperature of processor, |
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which depends on the CPU model. See table below. At this temperature, protection |
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mechanism will perform actions to forcibly cool down the processor. Alarm |
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may be raised, if the temperature grows enough (more than TjMax) to trigger |
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the Out-Of-Spec bit. Following table summarizes the exported sysfs files: |
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All Sysfs entries are named with their core_id (represented here by 'X'). |
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================= ======================================================== |
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tempX_input Core temperature (in millidegrees Celsius). |
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tempX_max All cooling devices should be turned on (on Core2). |
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tempX_crit Maximum junction temperature (in millidegrees Celsius). |
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tempX_crit_alarm Set when Out-of-spec bit is set, never clears. |
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Correct CPU operation is no longer guaranteed. |
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tempX_label Contains string "Core X", where X is processor |
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number. For Package temp, this will be "Physical id Y", |
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where Y is the package number. |
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================= ======================================================== |
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On CPU models which support it, TjMax is read from a model-specific register. |
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On other models, it is set to an arbitrary value based on weak heuristics. |
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If these heuristics don't work for you, you can pass the correct TjMax value |
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as a module parameter (tjmax). |
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Appendix A. Known TjMax lists (TBD): |
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Some information comes from ark.intel.com |
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=============== =============================================== ================ |
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Process Processor TjMax(C) |
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22nm Core i5/i7 Processors |
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i7 3920XM, 3820QM, 3720QM, 3667U, 3520M 105 |
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i5 3427U, 3360M/3320M 105 |
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i7 3770/3770K 105 |
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i5 3570/3570K, 3550, 3470/3450 105 |
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i7 3770S 103 |
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i5 3570S/3550S, 3475S/3470S/3450S 103 |
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i7 3770T 94 |
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i5 3570T 94 |
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i5 3470T 91 |
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32nm Core i3/i5/i7 Processors |
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i7 2600 98 |
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i7 660UM/640/620, 640LM/620, 620M, 610E 105 |
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i5 540UM/520/430, 540M/520/450/430 105 |
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i3 330E, 370M/350/330 90 rPGA, 105 BGA |
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i3 330UM 105 |
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32nm Core i7 Extreme Processors |
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980X 100 |
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32nm Celeron Processors |
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U3400 105 |
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P4505/P4500 90 |
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32nm Atom Processors |
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S1260/1220 95 |
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S1240 102 |
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Z2460 90 |
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Z2760 90 |
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D2700/2550/2500 100 |
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N2850/2800/2650/2600 100 |
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45nm Xeon Processors 5400 Quad-Core |
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X5492, X5482, X5472, X5470, X5460, X5450 85 |
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E5472, E5462, E5450/40/30/20/10/05 85 |
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L5408 95 |
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L5430, L5420, L5410 70 |
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45nm Xeon Processors 5200 Dual-Core |
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X5282, X5272, X5270, X5260 90 |
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E5240 90 |
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E5205, E5220 70, 90 |
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L5240 70 |
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L5238, L5215 95 |
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45nm Atom Processors |
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D525/510/425/410 100 |
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K525/510/425/410 100 |
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Z670/650 90 |
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Z560/550/540/530P/530/520PT/520/515/510PT/510P 90 |
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Z510/500 90 |
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N570/550 100 |
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N475/470/455/450 100 |
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N280/270 90 |
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330/230 125 |
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E680/660/640/620 90 |
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E680T/660T/640T/620T 110 |
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E665C/645C 90 |
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E665CT/645CT 110 |
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CE4170/4150/4110 110 |
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CE4200 series unknown |
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CE5300 series unknown |
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45nm Core2 Processors |
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Solo ULV SU3500/3300 100 |
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T9900/9800/9600/9550/9500/9400/9300/8300/8100 105 |
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T6670/6500/6400 105 |
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T6600 90 |
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SU9600/9400/9300 105 |
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SP9600/9400 105 |
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SL9600/9400/9380/9300 105 |
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P9700/9600/9500/8800/8700/8600/8400/7570 105 |
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P7550/7450 90 |
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45nm Core2 Quad Processors |
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Q9100/9000 100 |
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45nm Core2 Extreme Processors |
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X9100/9000 105 |
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QX9300 100 |
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45nm Core i3/i5/i7 Processors |
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i7 940XM/920 100 |
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i7 840QM/820/740/720 100 |
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45nm Celeron Processors |
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SU2300 100 |
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900 105 |
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65nm Core2 Duo Processors |
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Solo U2200, U2100 100 |
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U7700/7600/7500 100 |
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T7800/7700/7600/7500/7400/7300/7250/7200/7100 100 |
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T5870/5670/5600/5550/5500/5470/5450/5300/5270 100 |
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T5250 100 |
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T5800/5750/5200 85 |
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L7700/7500/7400/7300/7200 100 |
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65nm Core2 Extreme Processors |
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X7900/7800 100 |
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65nm Core Duo Processors |
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U2500/2400 100 |
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T2700/2600/2450/2400/2350/2300E/2300/2250/2050 100 |
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L2500/2400/2300 100 |
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65nm Core Solo Processors |
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U1500/1400/1300 100 |
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T1400/1350/1300/1250 100 |
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65nm Xeon Processors 5000 Quad-Core |
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X5000 90-95 |
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E5000 80 |
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L5000 70 |
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L5318 95 |
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65nm Xeon Processors 5000 Dual-Core |
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5080, 5063, 5060, 5050, 5030 80-90 |
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5160, 5150, 5148, 5140, 5130, 5120, 5110 80 |
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L5138 100 |
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65nm Celeron Processors |
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T1700/1600 100 |
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560/550/540/530 100 |
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=============== =============================================== ================
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