/linux/arch/s390/kernel/ |
H A D | idle.c | 26 struct s390_idle_data *idle = this_cpu_ptr(&s390_idle); in account_idle_time_irq() local 35 this_cpu_add(mt_cycles[i], cycles_new[i] - idle->mt_cycles_enter[i]); in account_idle_time_irq() 38 idle_time = lc->int_clock - idle->clock_idle_enter; in account_idle_time_irq() 40 lc->steal_timer += idle->clock_idle_enter - lc->last_update_clock; in account_idle_time_irq() 43 lc->system_timer += lc->last_update_timer - idle->timer_idle_enter; in account_idle_time_irq() 47 WRITE_ONCE(idle->idle_time, READ_ONCE(idle->idle_time) + idle_time); in account_idle_time_irq() 48 WRITE_ONCE(idle->idle_count, READ_ONCE(idle->idle_count) + 1); in account_idle_time_irq() 54 struct s390_idle_data *idle = this_cpu_ptr(&s390_idle); in arch_cpu_idle() local 63 stcctm(MT_DIAG, smp_cpu_mtid, (u64 *)&idle->mt_cycles_enter); in arch_cpu_idle() 64 idle->clock_idle_enter = get_tod_clock_fast(); in arch_cpu_idle() [all …]
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/linux/Documentation/devicetree/bindings/powerpc/opal/ |
H A D | power-mgt.txt | 5 idle states. The description of these idle states is exposed via the 10 Typically each idle state has the following associated properties: 12 - name: The name of the idle state as defined by the firmware. 14 - flags: indicating some aspects of this idle states such as the 16 idle states and so on. The flag bits are as follows: 19 CPU from idle to running. 22 this idle state in order to accrue power-savings 27 The following properties provide details about the idle states. These 29 provides the value of that property for the idle state associated with 32 If idle-states are defined, then the properties [all …]
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/linux/Documentation/admin-guide/pm/ |
H A D | intel_idle.rst | 17 :doc:`CPU idle time management subsystem <cpuidle>` in the Linux kernel 18 (``CPUIdle``). It is the default CPU idle time management driver for the 27 logical CPU executing it is idle and so it may be possible to put some of the 42 .. _intel-idle-enumeration-of-states: 50 as C-states (in the ACPI terminology) or idle states. The list of meaningful 51 ``MWAIT`` hint values and idle states (i.e. low-power configurations of the 55 In order to create a list of available idle states required by the ``CPUIdle`` 56 subsystem (see :ref:`idle-states-representation` in 58 ``intel_idle`` can use two sources of information: static tables of idle states 66 `below <intel-idle-parameters_>`_.] [all …]
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H A D | cpuidle.rst | 21 memory or executed. Those states are the *idle* states of the processor. 23 Since part of the processor hardware is not used in idle states, entering them 27 CPU idle time management is an energy-efficiency feature concerned about using 28 the idle states of processors for this purpose. 33 CPU idle time management operates on CPUs as seen by the *CPU scheduler* (that 44 enter an idle state, that applies to the processor as a whole. 52 enter an idle state, that applies to the core that asked for it in the first 56 except for one have been put into idle states at the "core level" and the 57 remaining core asks the processor to enter an idle state, that may trigger it 58 to put the whole larger unit into an idle state which also will affect the [all …]
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/linux/Documentation/admin-guide/thermal/ |
H A D | intel_powerclamp.rst | 46 idle injection across all online CPU threads was introduced. The goal 70 If the kernel can also inject idle time to the system, then a 73 control system, where the target set point is a user-selected idle 75 between the actual package level C-state residency ratio and the target idle 83 thread synchronizes its idle time and duration, based on the rounding 91 Alignment of idle time around jiffies ensures scalability for HZ 94 kidle_inject/cpu. During idle injection, it runs monitor/mwait idle 98 The NOHZ schedule tick is disabled during idle time, but interrupts 125 In terms of dynamics of the idle control system, package level idle 128 intel_powerclamp driver attempts to enforce the desired idle time [all …]
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/linux/drivers/gpu/drm/nouveau/nvkm/engine/gr/ |
H 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()
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/linux/drivers/cpuidle/ |
H A D | Kconfig.arm | 6 bool "Generic ARM CPU idle Driver" 12 It provides a generic idle driver whose idle states are configured 14 initialized by calling the CPU operations init idle hook 18 bool "PSCI CPU idle Driver" 24 It provides an idle driver that is capable of detecting and 25 managing idle states through the PSCI firmware interface. 28 - If the idle states are described with the non-hierarchical layout, 29 all idle states are still available. 31 - If the idle states are described with the hierarchical layout, 32 only the idle states defined per CPU are available, but not the ones [all …]
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/linux/Documentation/driver-api/thermal/ |
H A D | cpu-idle-cooling.rst | 37 decrease. Acting on the idle state duration or the idle cycle 47 At a specific OPP, we can assume that injecting idle cycle on all CPUs 49 idle state target residency, we lead to dropping the static and the 51 this state). So the sustainable power with idle cycles has a linear 60 The base concept of the idle injection is to force the CPU to go to an 61 idle state for a specified time each control cycle, it provides 64 their idle cycles synchronously, the cluster can reach its power down 66 to almost zero. However, these idle cycles injection will add extra 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. [all …]
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/linux/arch/arm/mach-tegra/ |
H 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()
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/linux/Documentation/driver-api/pm/ |
H A D | cpuidle.rst | 18 cores) is idle after an interrupt or equivalent wakeup event, which means that 19 there are no tasks to run on it except for the special "idle" task associated 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. 25 However, there may be multiple different idle states that can be used in such a 28 particular idle state. That is the role of the CPU idle time management 35 units: *governors* responsible for selecting idle states to ask the processor 43 A CPU idle time (``CPUIdle``) governor is a bundle of policy code invoked when 44 one of the logical CPUs in the system turns out to be idle. Its role is to 45 select an idle state to ask the processor to enter in order to save some energy. [all …]
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/linux/fs/proc/ |
H A D | uptime.c | 15 struct timespec64 idle; in uptime_proc_show() local 31 idle.tv_sec = div_u64_rem(idle_nsec, NSEC_PER_SEC, &rem); in uptime_proc_show() 32 idle.tv_nsec = rem; in uptime_proc_show() 36 (unsigned long) idle.tv_sec, in uptime_proc_show() 37 (idle.tv_nsec / (NSEC_PER_SEC / 100))); in uptime_proc_show()
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/linux/Documentation/admin-guide/mm/ |
H A D | idle_page_tracking.rst | 8 The idle page tracking feature allows to track which memory pages are being 9 accessed by a workload and which are idle. This information can be useful for 21 The idle page tracking API is located at ``/sys/kernel/mm/page_idle``. 28 set, the corresponding page is idle. 30 A page is considered idle if it has not been accessed since it was marked idle 33 To mark a page idle one has to set the bit corresponding to 39 page types (e.g. SLAB pages) an attempt to mark a page idle is silently ignored, 40 and hence such pages are never reported idle. 42 For huge pages the idle flag is set only on the head page, so one has to read 43 ``/proc/kpageflags`` in order to correctly count idle huge pages. [all …]
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/linux/arch/arm64/boot/dts/freescale/ |
H A D | fsl-ls2088a.dtsi | 28 cpu-idle-states = <&CPU_PW20>; 38 cpu-idle-states = <&CPU_PW20>; 48 cpu-idle-states = <&CPU_PW20>; 58 cpu-idle-states = <&CPU_PW20>; 69 cpu-idle-states = <&CPU_PW20>; 78 cpu-idle-states = <&CPU_PW20>; 88 cpu-idle-states = <&CPU_PW20>; 98 cpu-idle-states = <&CPU_PW20>; 128 compatible = "arm,idle-state"; 129 idle-state-name = "PW20";
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H A D | fsl-ls2080a.dtsi | 28 cpu-idle-states = <&CPU_PW20>; 38 cpu-idle-states = <&CPU_PW20>; 48 cpu-idle-states = <&CPU_PW20>; 58 cpu-idle-states = <&CPU_PW20>; 68 cpu-idle-states = <&CPU_PW20>; 78 cpu-idle-states = <&CPU_PW20>; 89 cpu-idle-states = <&CPU_PW20>; 98 cpu-idle-states = <&CPU_PW20>; 128 compatible = "arm,idle-state"; 129 idle-state-name = "PW20";
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/linux/tools/power/cpupower/ |
H A D | cpupower-completion.sh | 41 idle-info) COMPREPLY=($(compgen -W "$flags" -- "$cur")) ;; 51 idle-set) COMPREPLY=($(compgen -W "$flags" -- "$cur")) ;; 86 idle-info) _idle_info ;; 87 idle-set) _idle_set ;; 120 idle-info) _idle_info ;; 121 idle-set) _idle_set ;;
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/linux/kernel/sched/ |
H A D | ext.h | 60 void __scx_update_idle(struct rq *rq, bool idle); 62 static inline void scx_update_idle(struct rq *rq, bool idle) in scx_update_idle() argument 65 __scx_update_idle(rq, idle); in scx_update_idle() 68 static inline void scx_update_idle(struct rq *rq, bool idle) {} in scx_update_idle() argument 80 void scx_group_set_idle(struct task_group *tg, bool idle); 89 static inline void scx_group_set_idle(struct task_group *tg, bool idle) {} in scx_group_set_idle() argument
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/linux/Documentation/scheduler/ |
H A D | sched-stats.rst | 55 4) # of times schedule() left the processor idle 81 of idleness (idle, busy, and newly idle): 84 cpu was idle 86 the load did not require balancing when the cpu was idle 88 more tasks and failed, when the cpu was idle 90 sched_balance_rq() in this domain when the cpu was idle 92 was idle 94 the target task was cache-hot when idle 96 not find a busier queue while the cpu was idle 98 cpu was idle but no busier group was found [all …]
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/linux/arch/arm64/boot/dts/sprd/ |
H A D | ums9620.dtsi | 53 cpu-idle-states = <&LIT_CORE_PD>; 61 cpu-idle-states = <&LIT_CORE_PD>; 69 cpu-idle-states = <&LIT_CORE_PD>; 77 cpu-idle-states = <&LIT_CORE_PD>; 85 cpu-idle-states = <&BIG_CORE_PD>; 93 cpu-idle-states = <&BIG_CORE_PD>; 101 cpu-idle-states = <&BIG_CORE_PD>; 109 cpu-idle-states = <&BIG_CORE_PD>; 113 idle-states { 116 compatible = "arm,idle-state"; [all …]
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/linux/Documentation/timers/ |
H A D | no_hz.rst | 19 2. Omit scheduling-clock ticks on idle CPUs (CONFIG_NO_HZ_IDLE=y or 23 3. Omit scheduling-clock ticks on CPUs that are either idle or that 40 that use short bursts of CPU, where there are very frequent idle 41 periods, but where these idle periods are also quite short (tens or 46 other than increasing the overhead of switching to and from idle and 52 However, if you are instead running a light workload with long idle 68 If a CPU is idle, there is little point in sending it a scheduling-clock 71 and an idle CPU has no duties to shift its attention among. 73 An idle CPU that is not receiving scheduling-clock interrupts is said to 74 be "dyntick-idle", "in dyntick-idle mode", "in nohz mode", or "running [all …]
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/linux/Documentation/translations/zh_CN/core-api/ |
H A D | workqueue.rst | 577 pool[00] ref= 1 nice= 0 idle/workers= 4/ 4 cpu= 0 578 pool[01] ref= 1 nice=-20 idle/workers= 2/ 2 cpu= 0 579 pool[02] ref= 1 nice= 0 idle/workers= 4/ 4 cpu= 1 580 pool[03] ref= 1 nice=-20 idle/workers= 2/ 2 cpu= 1 581 pool[04] ref= 1 nice= 0 idle/workers= 4/ 4 cpu= 2 582 pool[05] ref= 1 nice=-20 idle/workers= 2/ 2 cpu= 2 583 pool[06] ref= 1 nice= 0 idle/workers= 3/ 3 cpu= 3 584 pool[07] ref= 1 nice=-20 idle/workers= 2/ 2 cpu= 3 585 pool[08] ref=42 nice= 0 idle/workers= 6/ 6 cpus=0000000f 586 pool[09] ref=28 nice= 0 idle/workers= 3/ 3 cpus=00000003 [all …]
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/linux/arch/x86/include/asm/ |
H A D | stackprotector.h | 66 static inline void cpu_init_stack_canary(int cpu, struct task_struct *idle) in cpu_init_stack_canary() argument 69 per_cpu(fixed_percpu_data.stack_canary, cpu) = idle->stack_canary; in cpu_init_stack_canary() 71 per_cpu(__stack_chk_guard, cpu) = idle->stack_canary; in cpu_init_stack_canary() 79 static inline void cpu_init_stack_canary(int cpu, struct task_struct *idle) in cpu_init_stack_canary() argument
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/linux/Documentation/devicetree/bindings/mfd/ |
H A D | twl4030-power.txt | 11 "ti,twl4030-power-idle" 12 "ti,twl4030-power-idle-osc-off" 17 When using ti,twl4030-power-idle, the TI recommended configuration 18 for idle modes is loaded to the tlw4030 PMIC. 20 When using ti,twl4030-power-idle-osc-off, the TI recommended 22 down during off-idle. Note that this does not work on all boards
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/linux/arch/powerpc/include/asm/ |
H A D | idle.h | 49 get_lppaca()->idle = 1; in pseries_idle_prolog() 56 get_lppaca()->idle = 0; in pseries_idle_epilog() 68 if (unlikely(get_lppaca()->idle == 1)) { in read_this_idle_purr() 84 if (get_lppaca()->idle == 1) { in read_this_idle_spurr()
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/linux/drivers/macintosh/ |
H A D | via-macii.c | 108 idle, enumerator 154 macii_state = idle; in macii_init() 270 if (macii_state == idle) in macii_write() 291 if (current_req && macii_state == idle) in macii_autopoll() 386 case idle: in macii_interrupt() 475 macii_state = idle; in macii_interrupt() 507 macii_state = idle; in macii_interrupt() 543 if (macii_state == idle) { in macii_interrupt() 550 if (macii_state == idle) { in macii_interrupt()
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/linux/drivers/gpu/drm/etnaviv/ |
H A D | etnaviv_gpu.c | 510 u32 control, idle; in etnaviv_hw_reset() local 559 idle = gpu_read(gpu, VIVS_HI_IDLE_STATE); in etnaviv_hw_reset() 562 if ((idle & VIVS_HI_IDLE_STATE_FE) == 0) { in etnaviv_hw_reset() 586 idle = gpu_read(gpu, VIVS_HI_IDLE_STATE); in etnaviv_hw_reset() 590 idle & VIVS_HI_IDLE_STATE_FE ? "" : "not ", in etnaviv_hw_reset() 930 u32 dma_lo, dma_hi, axi, idle; in etnaviv_gpu_debugfs() local 942 idle = gpu_read(gpu, VIVS_HI_IDLE_STATE); in etnaviv_gpu_debugfs() 1008 seq_printf(m, "\tidle: 0x%08x\n", idle); in etnaviv_gpu_debugfs() 1009 idle |= ~gpu->idle_mask & ~VIVS_HI_IDLE_STATE_AXI_LP; in etnaviv_gpu_debugfs() 1010 if ((idle & VIVS_HI_IDLE_STATE_FE) == 0) in etnaviv_gpu_debugfs() [all …]
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