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/linux/Documentation/hwmon/
H A Dfam15h_power.rst16 - BIOS and Kernel Developer's Guide (BKDG) For AMD Family 15h Processors
17 - BIOS and Kernel Developer's Guide (BKDG) For AMD Family 16h Processors
18 - AMD64 Architecture Programmer's Manual Volume 2: System Programming
23 -----------
25 1) Processor TDP (Thermal design power)
27 Given a fixed frequency and voltage, the power consumption of a
28 processor varies based on the workload being executed. Derated power
29 is the power consumed when running a specific application. Thermal
30 design power (TDP) is an example of derated power.
32 This driver permits reading of registers providing power information
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/linux/tools/perf/pmu-events/arch/x86/haswell/
H A Dhsw-metrics.json4 "MetricExpr": "cstate_pkg@c2\\-residency@ / msr@tsc@",
5 "MetricGroup": "Power",
11 "MetricExpr": "cstate_core@c3\\-residency@ / msr@tsc@",
12 "MetricGroup": "Power",
18 "MetricExpr": "cstate_pkg@c3\\-residency@ / msr@tsc@",
19 "MetricGroup": "Power",
25 "MetricExpr": "cstate_core@c6\\-residency@ / msr@tsc@",
26 "MetricGroup": "Power",
32 "MetricExpr": "cstate_pkg@c6\\-residency@ / msr@tsc@",
33 "MetricGroup": "Power",
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/linux/tools/perf/pmu-events/arch/x86/haswellx/
H A Dhsx-metrics.json4 "MetricExpr": "cstate_pkg@c2\\-residency@ / msr@tsc@",
5 "MetricGroup": "Power",
11 "MetricExpr": "cstate_core@c3\\-residency@ / msr@tsc@",
12 "MetricGroup": "Power",
18 "MetricExpr": "cstate_pkg@c3\\-residency@ / msr@tsc@",
19 "MetricGroup": "Power",
25 "MetricExpr": "cstate_core@c6\\-residency@ / msr@tsc@",
26 "MetricGroup": "Power",
32 "MetricExpr": "cstate_pkg@c6\\-residency@ / msr@tsc@",
33 "MetricGroup": "Power",
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/linux/tools/perf/pmu-events/arch/x86/ivytown/
H A Divt-metrics.json4 "MetricExpr": "cstate_pkg@c2\\-residency@ / msr@tsc@",
5 "MetricGroup": "Power",
11 "MetricExpr": "cstate_core@c3\\-residency@ / msr@tsc@",
12 "MetricGroup": "Power",
18 "MetricExpr": "cstate_pkg@c3\\-residency@ / msr@tsc@",
19 "MetricGroup": "Power",
25 "MetricExpr": "cstate_core@c6\\-residency@ / msr@tsc@",
26 "MetricGroup": "Power",
32 "MetricExpr": "cstate_pkg@c6\\-residency@ / msr@tsc@",
33 "MetricGroup": "Power",
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/linux/tools/perf/pmu-events/arch/x86/jaketown/
H A Djkt-metrics.json4 "MetricExpr": "cstate_pkg@c2\\-residency@ / msr@tsc@",
5 "MetricGroup": "Power",
11 "MetricExpr": "cstate_core@c3\\-residency@ / msr@tsc@",
12 "MetricGroup": "Power",
18 "MetricExpr": "cstate_pkg@c3\\-residency@ / msr@tsc@",
19 "MetricGroup": "Power",
25 "MetricExpr": "cstate_core@c6\\-residency@ / msr@tsc@",
26 "MetricGroup": "Power",
32 "MetricExpr": "cstate_pkg@c6\\-residency@ / msr@tsc@",
33 "MetricGroup": "Power",
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/linux/tools/perf/pmu-events/arch/x86/tigerlake/
H A Dtgl-metrics.json4 "MetricExpr": "cstate_pkg@c10\\-residency@ / msr@tsc@",
5 "MetricGroup": "Power",
11 "MetricExpr": "cstate_pkg@c2\\-residency@ / msr@tsc@",
12 "MetricGroup": "Power",
18 "MetricExpr": "cstate_pkg@c3\\-residency@ / msr@tsc@",
19 "MetricGroup": "Power",
25 "MetricExpr": "cstate_core@c6\\-residency@ / msr@tsc@",
26 "MetricGroup": "Power",
32 "MetricExpr": "cstate_pkg@c6\\-residency@ / msr@tsc@",
33 "MetricGroup": "Power",
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/linux/tools/perf/pmu-events/arch/x86/rocketlake/
H A Drkl-metrics.json4 "MetricExpr": "cstate_pkg@c10\\-residency@ / msr@tsc@",
5 "MetricGroup": "Power",
11 "MetricExpr": "cstate_pkg@c2\\-residency@ / msr@tsc@",
12 "MetricGroup": "Power",
18 "MetricExpr": "cstate_pkg@c3\\-residency@ / msr@tsc@",
19 "MetricGroup": "Power",
25 "MetricExpr": "cstate_core@c6\\-residency@ / msr@tsc@",
26 "MetricGroup": "Power",
32 "MetricExpr": "cstate_pkg@c6\\-residency@ / msr@tsc@",
33 "MetricGroup": "Power",
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/linux/tools/perf/pmu-events/arch/x86/cascadelakex/
H A Dclx-metrics.json4 "MetricExpr": "cstate_pkg@c2\\-residency@ / msr@tsc@",
5 "MetricGroup": "Power",
11 "MetricExpr": "cstate_core@c3\\-residency@ / msr@tsc@",
12 "MetricGroup": "Power",
18 "MetricExpr": "cstate_pkg@c3\\-residency@ / msr@tsc@",
19 "MetricGroup": "Power",
25 "MetricExpr": "cstate_core@c6\\-residency@ / msr@tsc@",
26 "MetricGroup": "Power",
32 "MetricExpr": "cstate_pkg@c6\\-residency@ / msr@tsc@",
33 "MetricGroup": "Power",
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/linux/tools/perf/pmu-events/arch/x86/icelakex/
H A Dicx-metrics.json4 "MetricExpr": "cstate_core@c1\\-residency@ / msr@tsc@",
5 "MetricGroup": "Power",
11 "MetricExpr": "cstate_pkg@c2\\-residency@ / msr@tsc@",
12 "MetricGroup": "Power",
18 "MetricExpr": "cstate_core@c6\\-residency@ / msr@tsc@",
19 "MetricGroup": "Power",
25 "MetricExpr": "cstate_pkg@c6\\-residency@ / msr@tsc@",
26 "MetricGroup": "Power",
49 "BriefDescription": "Percentage of time spent in the active CPU power state C0",
210 …"BriefDescription": "Average latency of a last level cache (LLC) demand data read miss (read memor…
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/linux/tools/perf/pmu-events/arch/x86/ivybridge/
H A Divb-metrics.json4 "MetricExpr": "cstate_pkg@c2\\-residency@ / msr@tsc@",
5 "MetricGroup": "Power",
11 "MetricExpr": "cstate_core@c3\\-residency@ / msr@tsc@",
12 "MetricGroup": "Power",
18 "MetricExpr": "cstate_pkg@c3\\-residency@ / msr@tsc@",
19 "MetricGroup": "Power",
25 "MetricExpr": "cstate_core@c6\\-residency@ / msr@tsc@",
26 "MetricGroup": "Power",
32 "MetricExpr": "cstate_pkg@c6\\-residency@ / msr@tsc@",
33 "MetricGroup": "Power",
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/linux/tools/perf/pmu-events/arch/x86/icelake/
H A Dicl-metrics.json4 "MetricExpr": "cstate_pkg@c10\\-residency@ / msr@tsc@",
5 "MetricGroup": "Power",
11 "MetricExpr": "cstate_pkg@c2\\-residency@ / msr@tsc@",
12 "MetricGroup": "Power",
18 "MetricExpr": "cstate_pkg@c3\\-residency@ / msr@tsc@",
19 "MetricGroup": "Power",
25 "MetricExpr": "cstate_core@c6\\-residency@ / msr@tsc@",
26 "MetricGroup": "Power",
32 "MetricExpr": "cstate_pkg@c6\\-residency@ / msr@tsc@",
33 "MetricGroup": "Power",
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/linux/tools/perf/pmu-events/arch/x86/sapphirerapids/
H A Dspr-metrics.json4 "MetricExpr": "cstate_core@c1\\-residency@ / msr@tsc@",
5 "MetricGroup": "Power",
11 "MetricExpr": "cstate_pkg@c2\\-residency@ / msr@tsc@",
12 "MetricGroup": "Power",
18 "MetricExpr": "cstate_core@c6\\-residency@ / msr@tsc@",
19 "MetricGroup": "Power",
25 "MetricExpr": "cstate_pkg@c6\\-residency@ / msr@tsc@",
26 "MetricGroup": "Power",
43 …"BriefDescription": "The average number of cores that are in cstate C0 as observed by the power co…
49 …"BriefDescription": "The average number of cores are in cstate C6 as observed by the power control…
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/linux/tools/perf/pmu-events/arch/x86/skylakex/
H A Dskx-metrics.json4 "MetricExpr": "cstate_pkg@c2\\-residency@ / msr@tsc@",
5 "MetricGroup": "Power",
11 "MetricExpr": "cstate_core@c3\\-residency@ / msr@tsc@",
12 "MetricGroup": "Power",
18 "MetricExpr": "cstate_pkg@c3\\-residency@ / msr@tsc@",
19 "MetricGroup": "Power",
25 "MetricExpr": "cstate_core@c6\\-residency@ / msr@tsc@",
26 "MetricGroup": "Power",
32 "MetricExpr": "cstate_pkg@c6\\-residency@ / msr@tsc@",
33 "MetricGroup": "Power",
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/linux/tools/perf/pmu-events/arch/x86/broadwellde/
H A Dbdwde-metrics.json4 "MetricExpr": "cstate_pkg@c2\\-residency@ / msr@tsc@",
5 "MetricGroup": "Power",
11 "MetricExpr": "cstate_core@c3\\-residency@ / msr@tsc@",
12 "MetricGroup": "Power",
18 "MetricExpr": "cstate_pkg@c3\\-residency@ / msr@tsc@",
19 "MetricGroup": "Power",
25 "MetricExpr": "cstate_core@c6\\-residency@ / msr@tsc@",
26 "MetricGroup": "Power",
32 "MetricExpr": "cstate_pkg@c6\\-residency@ / msr@tsc@",
33 "MetricGroup": "Power",
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/linux/tools/perf/pmu-events/arch/x86/broadwellx/
H A Dbdx-metrics.json4 "MetricExpr": "cstate_pkg@c2\\-residency@ / msr@tsc@",
5 "MetricGroup": "Power",
11 "MetricExpr": "cstate_core@c3\\-residency@ / msr@tsc@",
12 "MetricGroup": "Power",
18 "MetricExpr": "cstate_pkg@c3\\-residency@ / msr@tsc@",
19 "MetricGroup": "Power",
25 "MetricExpr": "cstate_core@c6\\-residency@ / msr@tsc@",
26 "MetricGroup": "Power",
32 "MetricExpr": "cstate_pkg@c6\\-residency@ / msr@tsc@",
33 "MetricGroup": "Power",
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/linux/tools/perf/pmu-events/arch/x86/graniterapids/
H A Dgnr-metrics.json4 "MetricExpr": "cstate_core@c1\\-residency@ / msr@tsc@",
5 "MetricGroup": "Power",
11 "MetricExpr": "cstate_pkg@c2\\-residency@ / msr@tsc@",
12 "MetricGroup": "Power",
18 "MetricExpr": "cstate_core@c6\\-residency@ / msr@tsc@",
19 "MetricGroup": "Power",
25 "MetricExpr": "cstate_pkg@c6\\-residency@ / msr@tsc@",
26 "MetricGroup": "Power",
43 …"BriefDescription": "The average number of cores that are in cstate C0 as observed by the power co…
49 …"BriefDescription": "The average number of cores are in cstate C6 as observed by the power control…
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/linux/tools/perf/pmu-events/arch/x86/broadwell/
H A Dbdw-metrics.json4 "MetricExpr": "cstate_pkg@c2\\-residency@ / msr@tsc@",
5 "MetricGroup": "Power",
11 "MetricExpr": "cstate_core@c3\\-residency@ / msr@tsc@",
12 "MetricGroup": "Power",
18 "MetricExpr": "cstate_pkg@c3\\-residency@ / msr@tsc@",
19 "MetricGroup": "Power",
25 "MetricExpr": "cstate_core@c6\\-residency@ / msr@tsc@",
26 "MetricGroup": "Power",
32 "MetricExpr": "cstate_pkg@c6\\-residency@ / msr@tsc@",
33 "MetricGroup": "Power",
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/linux/tools/perf/pmu-events/arch/x86/emeraldrapids/
H A Demr-metrics.json4 "MetricExpr": "cstate_core@c1\\-residency@ / msr@tsc@",
5 "MetricGroup": "Power",
11 "MetricExpr": "cstate_pkg@c2\\-residency@ / msr@tsc@",
12 "MetricGroup": "Power",
18 "MetricExpr": "cstate_core@c6\\-residency@ / msr@tsc@",
19 "MetricGroup": "Power",
25 "MetricExpr": "cstate_pkg@c6\\-residency@ / msr@tsc@",
26 "MetricGroup": "Power",
43 …"BriefDescription": "The average number of cores that are in cstate C0 as observed by the power co…
49 …"BriefDescription": "The average number of cores are in cstate C6 as observed by the power control…
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/linux/kernel/sched/
H A Dloadavg.c1 // SPDX-License-Identifier: GPL-2.0
13 * Global load-average calculations
15 * We take a distributed and async approach to calculating the global load-avg
18 * The global load average is an exponentially decaying average of nr_running +
25 * nr_active += cpu_of(cpu)->nr_running + cpu_of(cpu)->nr_uninterruptible;
27 * avenrun[n] = avenrun[0] * exp_n + nr_active * (1 - exp_n)
31 * - for_each_possible_cpu() is prohibitively expensive on machines with
35 * \Sum_i x_i(t) = \Sum_i x_i(t) - x_i(t_0) | x_i(t_0) := 0
36 * = \Sum_i { \Sum_j=1 x_i(t_j) - x_i(t_j-1) }
38 * So assuming nr_active := 0 when we start out -- true per definition, we
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/linux/tools/perf/pmu-events/arch/x86/skylake/
H A Dskl-metrics.json4 "MetricExpr": "cstate_pkg@c2\\-residency@ / msr@tsc@",
5 "MetricGroup": "Power",
11 "MetricExpr": "cstate_core@c3\\-residency@ / msr@tsc@",
12 "MetricGroup": "Power",
18 "MetricExpr": "cstate_pkg@c3\\-residency@ / msr@tsc@",
19 "MetricGroup": "Power",
25 "MetricExpr": "cstate_core@c6\\-residency@ / msr@tsc@",
26 "MetricGroup": "Power",
32 "MetricExpr": "cstate_pkg@c6\\-residency@ / msr@tsc@",
33 "MetricGroup": "Power",
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/linux/tools/perf/pmu-events/arch/x86/sandybridge/
H A Dsnb-metrics.json4 "MetricExpr": "cstate_pkg@c2\\-residency@ / msr@tsc@",
5 "MetricGroup": "Power",
11 "MetricExpr": "cstate_core@c3\\-residency@ / msr@tsc@",
12 "MetricGroup": "Power",
18 "MetricExpr": "cstate_pkg@c3\\-residency@ / msr@tsc@",
19 "MetricGroup": "Power",
25 "MetricExpr": "cstate_core@c6\\-residency@ / msr@tsc@",
26 "MetricGroup": "Power",
32 "MetricExpr": "cstate_pkg@c6\\-residency@ / msr@tsc@",
33 "MetricGroup": "Power",
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/linux/tools/perf/pmu-events/arch/x86/alderlake/
H A Dadl-metrics.json4 "MetricExpr": "cstate_pkg@c10\\-residency@ / msr@tsc@",
5 "MetricGroup": "Power",
11 "MetricExpr": "cstate_core@c1\\-residency@ / msr@tsc@",
12 "MetricGroup": "Power",
18 "MetricExpr": "cstate_pkg@c2\\-residency@ / msr@tsc@",
19 "MetricGroup": "Power",
25 "MetricExpr": "cstate_pkg@c3\\-residency@ / msr@tsc@",
26 "MetricGroup": "Power",
32 "MetricExpr": "cstate_core@c6\\-residency@ / msr@tsc@",
33 "MetricGroup": "Power",
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/linux/tools/perf/pmu-events/arch/x86/meteorlake/
H A Dmtl-metrics.json4 "MetricExpr": "cstate_pkg@c10\\-residency@ / msr@tsc@",
5 "MetricGroup": "Power",
11 "MetricExpr": "cstate_core@c1\\-residency@ / msr@tsc@",
12 "MetricGroup": "Power",
18 "MetricExpr": "cstate_pkg@c2\\-residency@ / msr@tsc@",
19 "MetricGroup": "Power",
25 "MetricExpr": "cstate_pkg@c3\\-residency@ / msr@tsc@",
26 "MetricGroup": "Power",
32 "MetricExpr": "cstate_core@c6\\-residency@ / msr@tsc@",
33 "MetricGroup": "Power",
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/linux/tools/power/cpupower/bench/
H A DREADME-BENCH1 This is cpufreq-bench, a microbenchmark for the cpufreq framework.
7 - Identify worst case performance loss when doing dynamic frequency
9 - Identify average reaction time of a governor to CPU load changes
10 - (Stress) Testing whether a cpufreq low level driver or governor works
12 - Identify cpufreq related performance regressions between kernels
13 - Possibly Real time priority testing? -> what happens if there are
15 - ...
18 - Power saving related regressions (In fact as better the performance
19 throughput is, the worse the power savings will be, but the first should
21 - Real world (workloads)
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/linux/tools/perf/pmu-events/arch/x86/arrowlake/
H A Darl-metrics.json4 "MetricExpr": "cstate_pkg@c10\\-residency@ / msr@tsc@",
5 "MetricGroup": "Power",
11 "MetricExpr": "cstate_core@c1\\-residency@ / msr@tsc@",
12 "MetricGroup": "Power",
18 "MetricExpr": "cstate_pkg@c2\\-residency@ / msr@tsc@",
19 "MetricGroup": "Power",
25 "MetricExpr": "cstate_pkg@c3\\-residency@ / msr@tsc@",
26 "MetricGroup": "Power",
32 "MetricExpr": "cstate_core@c6\\-residency@ / msr@tsc@",
33 "MetricGroup": "Power",
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