| /linux/arch/s390/kernel/ |
| A D | idle.c | 59 psw_idle(idle, psw_mask); in arch_cpu_idle()
62 raw_write_seqcount_begin(&idle->seqcount); in arch_cpu_idle()
63 idle_time = idle->clock_idle_exit - idle->clock_idle_enter; in arch_cpu_idle()
64 idle->clock_idle_enter = idle->clock_idle_exit = 0ULL; in arch_cpu_idle()
65 idle->idle_time += idle_time; in arch_cpu_idle()
66 idle->idle_count++; in arch_cpu_idle()
68 raw_write_seqcount_end(&idle->seqcount); in arch_cpu_idle()
80 seq = read_seqcount_begin(&idle->seqcount); in show_idle_count()
81 idle_count = READ_ONCE(idle->idle_count); in show_idle_count()
82 if (READ_ONCE(idle->clock_idle_enter)) in show_idle_count()
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| /linux/Documentation/devicetree/bindings/powerpc/opal/ |
| A D | power-mgt.txt | 5 idle states. The description of these idle states is exposed via the
19 CPU from idle to running.
33 "ibm,cpu-idle-state-names" and "ibm,cpu-idle-state-flags" are
37 - ibm,cpu-idle-state-names:
40 - ibm,cpu-idle-state-flags:
63 ibm,cpu-idle-state-names.
73 - ibm,cpu-idle-state-psscr:
75 PSSCR for each of the idle states in ibm,cpu-idle-state-names.
78 - ibm,cpu-idle-state-psscr-mask:
106 - ibm,cpu-idle-state-pmicr:
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| /linux/Documentation/devicetree/bindings/arm/ |
| A D | idle-states.yaml | 7 title: ARM idle states binding description
47 2 - idle-states definitions
91 idle state to be worthwhile energywise.
105 of an idle state, e.g.:
214 3 - idle-states node
217 ARM processor idle states are defined within the idle-states node, which is
246 const: idle-states
278 const: arm,idle-state
315 idle-state-name:
479 idle-states {
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| A D | psci.yaml | 103 [1] Kernel documentation - ARM idle states bindings
104 Documentation/devicetree/bindings/arm/idle-states.yaml
118 CPU topology, must conform to the binding in [3]. The idle states
216 idle-states {
219 compatible = "arm,idle-state";
227 domain-idle-states {
230 compatible = "domain-idle-state";
238 compatible = "domain-idle-state";
253 domain-idle-states = <&CPU_PWRDN>;
259 domain-idle-states = <&CPU_PWRDN>;
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| /linux/Documentation/admin-guide/pm/ |
| A D | intel_idle.rst | 66 `below <intel-idle-parameters_>`_.]
86 initialized to represent a "polling idle state" (a pseudo-idle state in which
97 governors during CPU idle state selection). Otherwise, some of the listed idle
112 entry in the final list of idle states. The name of the idle state represented
126 .. _intel-idle-initialization:
144 `below <intel-idle-parameters_>`_), the idle states information provided by the
162 .. _intel-idle-parameters:
168 options related to CPU idle time management: ``idle=poll``, ``idle=halt``,
181 after finding that number of usable idle states (the other idle states that
208 idle state; see :ref:`idle-states-representation` in
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| A D | cpuidle.rst | 82 special "idle" task.
103 in Linux idle CPUs run the code of the "idle" task called *the idle loop*. That
106 idle states, or there is not enough time to spend in an idle state before the
119 idle time management subsystem called ``CPUIdle`` to select an idle state for
138 the shallower idle states instead. [The "depth" of an idle state roughly
165 tick can be `stopped by the idle loop <idle-cpus-and-tick_>`_. Available
210 exiting idle states due to the tick wakeups on idle CPUs will be wasted.
270 idle duration and uses the predicted value for idle state selection.
358 For the CPU idle time management purposes all of the physical idle states
619 options related to CPU idle time management: ``idle=poll``, ``idle=halt``,
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| /linux/Documentation/devicetree/bindings/thermal/ |
| A D | thermal-idle.yaml | 5 $id: http://devicetree.org/schemas/thermal/thermal-idle.yaml#
8 title: Thermal idle cooling device binding
14 The thermal idle cooling device allows the system to passively
15 mitigate the temperature on the device by injecting idle cycles,
18 This binding describes the thermal idle node.
22 const: thermal-idle
24 A thermal-idle node describes the idle cooling device properties to
36 The idle duration in microsecond the device should cool down.
42 idle state from among all the present ones.
69 thermal-idle {
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| /linux/Documentation/devicetree/bindings/mux/ |
| A D | mux-controller.yaml | 31 have when it is idle. The idle-state property is used for this. If the
34 idle-state property is an array with one idle state for each mux controller.
37 as is when it is idle. This is the default, but can still be useful for
39 there is a need to "step past" a mux controller and set some other idle
44 is indicated with idle state (-2).
60 idle-state = <MUX_IDLE_DISCONNECT MUX_IDLE_AS_IS 2>;
78 idle-state:
82 idle-states:
85 idle. If the idle-state is not present, the mux controller is typically
87 controllers, the idle-state property is an array with one idle state for
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| /linux/Documentation/driver-api/thermal/ |
| A D | intel_powerclamp.rst | 68 If the kernel can also inject idle time to the system, then a
92 kidle_inject/cpu. During idle injection, it runs monitor/mwait idle
123 In terms of dynamics of the idle control system, package level idle
150 a) determine the effective range of idle injection ratio
255 target idle ratio. The compensation also increases as the idle ratio
279 and includes natural idle. When idle injection is disabled, reading
284 - To inject 25% idle time::
290 will not show idle injection kernel threads.
293 idle time, powerclamp kernel threads will do idle injection. Forced
294 idle time is accounted as normal idle in that common code path is
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| A D | cpu-idle-cooling.rst | 37 decrease. Acting on the idle state duration or the idle cycle
49 idle state target residency, we lead to dropping the static and the
61 idle state for a specified time each control cycle, it provides
69 We use a fixed duration of idle injection that gives an acceptable
71 or decreased by modulating the duty cycle of the idle injection.
82 idle <---------------------->
110 idle <-------------->
124 idle <------>
172 the idle injection we need. Alternatively if we have the idle
190 rigorously compute the idle injection
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| /linux/Documentation/devicetree/bindings/power/ |
| A D | domain-idle-state.yaml | 4 $id: http://devicetree.org/schemas/power/domain-idle-state.yaml#
13 A domain idle state node represents the state parameters that will be used to
18 const: domain-idle-states
24 Each state node represents a domain idle state description.
28 const: domain-idle-state
32 The worst case latency in microseconds required to enter the idle
38 The worst case latency in microseconds required to exit the idle
43 The minimum residency duration in microseconds after which the idle
45 entering the idle state.
58 domain-idle-states {
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| A D | power-domain.yaml | 30 domain-idle-states:
33 Phandles of idle states that defines the available states for the
34 power-domain provider. The idle state definitions are compatible with the
35 domain-idle-state bindings, specified in ./domain-idle-state.yaml.
37 Note that, the domain-idle-state property reflects the idle states of this
40 the parent domain's idle states. In the absence of this property, the
108 domain-idle-states = <&DOMAIN_RET>, <&DOMAIN_PWR_DN>;
116 domain-idle-states = <&DOMAIN_PWR_DN>;
119 domain-idle-states {
121 compatible = "domain-idle-state";
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| /linux/drivers/staging/media/atomisp/pci/ |
| A D | sh_css_hrt.c | 39 bool not_idle = false, idle; in sh_css_hrt_system_is_idle() local
42 idle = sp_ctrl_getbit(SP0_ID, SP_SC_REG, SP_IDLE_BIT); in sh_css_hrt_system_is_idle()
43 not_idle |= !idle; in sh_css_hrt_system_is_idle()
44 if (!idle) in sh_css_hrt_system_is_idle()
47 idle = isp_ctrl_getbit(ISP0_ID, ISP_SC_REG, ISP_IDLE_BIT); in sh_css_hrt_system_is_idle()
48 not_idle |= !idle; in sh_css_hrt_system_is_idle()
49 if (!idle) in sh_css_hrt_system_is_idle()
|
| /linux/fs/proc/ |
| A D | stat.c | 29 u64 idle; in get_idle_time() local
31 idle = kcs->cpustat[CPUTIME_IDLE]; in get_idle_time()
33 idle += arch_idle_time(cpu); in get_idle_time()
34 return idle; in get_idle_time()
51 u64 idle, idle_usecs = -1ULL; in get_idle_time() local
58 idle = kcs->cpustat[CPUTIME_IDLE]; in get_idle_time()
60 idle = idle_usecs * NSEC_PER_USEC; in get_idle_time()
62 return idle; in get_idle_time()
118 user = nice = system = idle = iowait = in show_stat()
134 idle += get_idle_time(&kcpustat, i); in show_stat()
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| A D | uptime.c | 14 struct timespec64 idle; in uptime_proc_show() local
30 idle.tv_sec = div_u64_rem(idle_nsec, NSEC_PER_SEC, &rem); in uptime_proc_show()
31 idle.tv_nsec = rem; in uptime_proc_show()
35 (unsigned long) idle.tv_sec, in uptime_proc_show()
36 (idle.tv_nsec / (NSEC_PER_SEC / 100))); in uptime_proc_show()
|
| /linux/drivers/gpu/drm/nouveau/nvkm/engine/gr/ |
| A D | g84.c | 121 bool idle, timeout = false; in g84_gr_tlb_flush() local
132 idle = true; in g84_gr_tlb_flush()
134 for (tmp = nvkm_rd32(device, 0x400380); tmp && idle; tmp >>= 3) { in g84_gr_tlb_flush()
136 idle = false; in g84_gr_tlb_flush()
139 for (tmp = nvkm_rd32(device, 0x400384); tmp && idle; tmp >>= 3) { in g84_gr_tlb_flush()
141 idle = false; in g84_gr_tlb_flush()
144 for (tmp = nvkm_rd32(device, 0x400388); tmp && idle; tmp >>= 3) { in g84_gr_tlb_flush()
146 idle = false; in g84_gr_tlb_flush()
148 } while (!idle && in g84_gr_tlb_flush()
|
| /linux/arch/arm/mach-tegra/ |
| A D | platsmp.c | 42 static int tegra20_boot_secondary(unsigned int cpu, struct task_struct *idle) in tegra20_boot_secondary() argument
70 static int tegra30_boot_secondary(unsigned int cpu, struct task_struct *idle) in tegra30_boot_secondary() argument
129 static int tegra114_boot_secondary(unsigned int cpu, struct task_struct *idle) in tegra114_boot_secondary() argument
159 struct task_struct *idle) in tegra_boot_secondary() argument
162 return tegra20_boot_secondary(cpu, idle); in tegra_boot_secondary()
164 return tegra30_boot_secondary(cpu, idle); in tegra_boot_secondary()
166 return tegra114_boot_secondary(cpu, idle); in tegra_boot_secondary()
168 return tegra114_boot_secondary(cpu, idle); in tegra_boot_secondary()
|
| /linux/Documentation/driver-api/pm/ |
| A D | cpuidle.rst | 21 belongs to. That can be done by making the idle logical CPU stop fetching
23 depended on by it into an idle state in which they will draw less power.
28 particular idle state. That is the role of the CPU idle time management
85 struct cpuidle_state objects representing idle states that the
128 processor will be asked to enter the selected idle state without
131 asking the processor to enter the idle state).
145 idle state selections in the future.
180 governors for computations related to idle state selection:
185 be saved by staying in a shallower idle state for the same amount of
203 enter this particular idle state:
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| /linux/Documentation/devicetree/bindings/arm/msm/ |
| A D | qcom,idle-state.txt | 4 cpuidle-qcom is the cpuidle driver for Qualcomm SoCs and uses these idle
6 The idle states supported by the QCOM SoC are defined as -
59 the idle-states device node.
61 The devicetree representation of the idle state should be -
66 "qcom,idle-state-ret",
67 "qcom,idle-state-spc",
68 "qcom,idle-state-pc",
69 and "arm,idle-state".
75 idle-states {
77 compatible = "qcom,idle-state-spc", "arm,idle-state";
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| /linux/Documentation/devicetree/bindings/i2c/ |
| A D | i2c-mux-pinctrl.txt | 39 The only exception is that no bus will be created for a state named "idle". If
43 pinctrl-names = "ddc", "pta", "idle" -> ddc = bus 0, pta = bus 1
44 pinctrl-names = "ddc", "idle", "pta" -> Invalid ("idle" not last)
45 pinctrl-names = "idle", "ddc", "pta" -> Invalid ("idle" not last)
50 If an idle state is defined, whenever an access is not being made to a device
51 on a child bus, the idle pinctrl state will be programmed into hardware.
53 If an idle state is not defined, the most recently used pinctrl state will be
66 pinctrl-names = "ddc", "pta", "idle";
|
| /linux/arch/arm64/boot/dts/freescale/ |
| A D | fsl-ls2088a.dtsi | 21 cpu-idle-states = <&CPU_PW20>;
31 cpu-idle-states = <&CPU_PW20>;
41 cpu-idle-states = <&CPU_PW20>;
51 cpu-idle-states = <&CPU_PW20>;
62 cpu-idle-states = <&CPU_PW20>;
71 cpu-idle-states = <&CPU_PW20>;
81 cpu-idle-states = <&CPU_PW20>;
91 cpu-idle-states = <&CPU_PW20>;
113 compatible = "arm,idle-state";
114 idle-state-name = "PW20";
|
| A D | fsl-ls2080a.dtsi | 21 cpu-idle-states = <&CPU_PW20>;
31 cpu-idle-states = <&CPU_PW20>;
41 cpu-idle-states = <&CPU_PW20>;
51 cpu-idle-states = <&CPU_PW20>;
61 cpu-idle-states = <&CPU_PW20>;
71 cpu-idle-states = <&CPU_PW20>;
82 cpu-idle-states = <&CPU_PW20>;
91 cpu-idle-states = <&CPU_PW20>;
113 compatible = "arm,idle-state";
114 idle-state-name = "PW20";
|
| /linux/Documentation/admin-guide/mm/ |
| A D | idle_page_tracking.rst | 10 The idle page tracking feature allows to track which memory pages are being
11 accessed by a workload and which are idle. This information can be useful for
23 The idle page tracking API is located at ``/sys/kernel/mm/page_idle``.
30 set, the corresponding page is idle.
32 A page is considered idle if it has not been accessed since it was marked idle
35 To mark a page idle one has to set the bit corresponding to
42 and hence such pages are never reported idle.
44 For huge pages the idle flag is set only on the head page, so one has to read
45 ``/proc/kpageflags`` in order to correctly count idle huge pages.
55 1. Mark all the workload's pages as idle by setting corresponding bits in
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| /linux/Documentation/scheduler/ |
| A D | sched-stats.rst | 50 4) # of times schedule() left the processor idle
76 of idleness (idle, busy, and newly idle):
79 cpu was idle
83 more tasks and failed, when the cpu was idle
85 load_balance() in this domain when the cpu was idle
87 was idle
89 the target task was cache-hot when idle
91 not find a busier queue while the cpu was idle
93 cpu was idle but no busier group was found
111 cpu was just becoming idle
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| /linux/Documentation/timers/ |
| A D | no_hz.rst | 71 and an idle CPU has no duties to shift its attention among.
74 be "dyntick-idle", "in dyntick-idle mode", "in nohz mode", or "running
86 idle CPUs. That said, dyntick-idle mode is not free:
89 to and from the idle loop.
101 dyntick-idle mode.
110 task implies also omitting them for idle CPUs.
233 * Dyntick-idle slows transitions to and from idle slightly.
244 b. On x86 systems, use the "idle=mwait" boot parameter.
249 d. On x86 systems, use the "idle=poll" boot parameter.
253 be even worse than that of dyntick-idle. Furthermore,
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