| /kernel/linux/linux-5.10/Documentation/devicetree/bindings/arm/ |
| D | idle-states.yaml | 1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/arm/idle-states.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
14 1 - Introduction
18 where cores can be put in different low-power states (ranging from simple wfi
20 range of dynamic idle states that a processor can enter at run-time, can be
22 enter/exit specific idle states on a given processor.
27 - Running
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| D | psci.yaml | 1 # SPDX-License-Identifier: GPL-2.0
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
15 processors") can be used by Linux to initiate various CPU-centric power
25 r0 => 32-bit Function ID / return value
26 {r1 - r3} => Parameters
40 - description:
44 - description:
46 const: arm,psci-0.2
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| /kernel/linux/linux-4.19/Documentation/devicetree/bindings/arm/ |
| D | idle-states.txt | 6 1 - Introduction
10 where cores can be put in different low-power states (ranging from simple
12 the range of dynamic idle states that a processor can enter at run-time, can be
14 to enter/exit specific idle states on a given processor.
19 - Running
20 - Idle_standby
21 - Idle_retention
22 - Sleep
23 - Off
29 wake-up capabilities, hence it is not considered in this document).
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| /kernel/linux/linux-5.10/Documentation/devicetree/bindings/power/ |
| D | domain-idle-state.yaml | 1 # SPDX-License-Identifier: GPL-2.0
3 ---
4 $id: http://devicetree.org/schemas/power/domain-idle-state.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Ulf Hansson <ulf.hansson@linaro.org>
18 const: domain-idle-states
21 "^(cpu|cluster|domain)-":
28 const: domain-idle-state
30 entry-latency-us:
32 The worst case latency in microseconds required to enter the idle
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| D | power-domain.yaml | 1 # SPDX-License-Identifier: GPL-2.0
3 ---
4 $id: http://devicetree.org/schemas/power/power-domain.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Rafael J. Wysocki <rjw@rjwysocki.net>
11 - Kevin Hilman <khilman@kernel.org>
12 - Ulf Hansson <ulf.hansson@linaro.org>
24 \#power-domain-cells property in the PM domain provider node.
28 pattern: "^(power-controller|power-domain)([@-].*)?$"
30 domain-idle-states:
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| /kernel/linux/linux-4.19/Documentation/devicetree/bindings/power/ |
| D | domain-idle-state.txt | 6 The state node has the following parameters -
8 - compatible:
11 Definition: Must be "domain-idle-state".
13 - entry-latency-us
15 Value type: <prop-encoded-array>
16 Definition: u32 value representing worst case latency in
18 The exit-latency-us duration may be guaranteed
19 only after entry-latency-us has passed.
21 - exit-latency-us
23 Value type: <prop-encoded-array>
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| D | power_domain.txt | 12 #power-domain-cells property in the PM domain provider node.
17 - #power-domain-cells : Number of cells in a PM domain specifier;
23 - power-domains : A phandle and PM domain specifier as defined by bindings of
32 - domain-idle-states : A phandle of an idle-state that shall be soaked into a
34 compatible with domain-idle-state specified in [1]. phandles
35 that are not compatible with domain-idle-state will be
37 The domain-idle-state property reflects the idle state of this PM domain and
38 not the idle states of the devices or sub-domains in the PM domain. Devices
39 and sub-domains have their own idle-states independent of the parent
41 considered as capable of being powered-on or powered-off.
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| /kernel/linux/linux-5.10/Documentation/devicetree/bindings/thermal/ |
| D | thermal-idle.yaml | 1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
4 ---
5 $id: http://devicetree.org/schemas/thermal/thermal-idle.yaml#
6 $schema: http://devicetree.org/meta-schemas/core.yaml#
11 - Daniel Lezcano <daniel.lezcano@linaro.org>
22 const: thermal-idle
24 A thermal-idle node describes the idle cooling device properties to
27 '#cooling-cells':
31 the cooling-maps reference. The first cell is the minimum cooling state
34 duration-us:
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| /kernel/linux/linux-4.19/drivers/cpuidle/ |
| D | dt_idle_states.c | 12 #define pr_fmt(fmt) "DT idle-states: " fmt
34 return -ENODEV; in init_state_node()
40 idle_state->enter = match_id->data; in init_state_node()
46 idle_state->enter_s2idle = match_id->data; in init_state_node()
48 err = of_property_read_u32(state_node, "wakeup-latency-us", in init_state_node()
49 &idle_state->exit_latency); in init_state_node()
53 err = of_property_read_u32(state_node, "entry-latency-us", in init_state_node()
56 pr_debug(" * %pOF missing entry-latency-us property\n", in init_state_node()
58 return -EINVAL; in init_state_node()
61 err = of_property_read_u32(state_node, "exit-latency-us", in init_state_node()
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| /kernel/linux/linux-5.10/drivers/cpuidle/ |
| D | dt_idle_states.c | 1 // SPDX-License-Identifier: GPL-2.0-only
9 #define pr_fmt(fmt) "DT idle-states: " fmt
33 idle_state->enter = match_id->data; in init_state_node()
39 idle_state->enter_s2idle = match_id->data; in init_state_node()
41 err = of_property_read_u32(state_node, "wakeup-latency-us", in init_state_node()
42 &idle_state->exit_latency); in init_state_node()
46 err = of_property_read_u32(state_node, "entry-latency-us", in init_state_node()
49 pr_debug(" * %pOF missing entry-latency-us property\n", in init_state_node()
51 return -EINVAL; in init_state_node()
54 err = of_property_read_u32(state_node, "exit-latency-us", in init_state_node()
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| D | cpuidle-pseries.c | 1 // SPDX-License-Identifier: GPL-2.0
3 * cpuidle-pseries - idle state cpuidle driver.
78 * were soft-disabled in check_and_cede_processor()
92 * "ibm,get-systems-parameter" RTAS call with the token
98 * table with all the parameters to ibm,get-system-parameters.
99 * CEDE_LATENCY_TOKEN corresponds to the token value for Cede Latency
105 * If the platform supports the cede latency settings information system
109 * a. The first byte is the length “N” of each cede latency setting record minus
112 * b. For each supported cede latency setting a cede latency setting record
115 * -----------------------------
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| /kernel/linux/linux-5.10/arch/arm64/boot/dts/qcom/ |
| D | sdm630.dtsi | 1 // SPDX-License-Identifier: BSD-3-Clause
6 #include <dt-bindings/clock/qcom,gcc-sdm660.h>
7 #include <dt-bindings/clock/qcom,rpmcc.h>
8 #include <dt-bindings/gpio/gpio.h>
9 #include <dt-bindings/interrupt-controller/arm-gic.h>
12 interrupt-parent = <&intc>;
14 #address-cells = <2>;
15 #size-cells = <2>;
20 xo_board: xo-board {
21 compatible = "fixed-clock";
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| /kernel/linux/linux-4.19/Documentation/devicetree/bindings/arm/msm/ |
| D | qcom,idle-state.txt | 3 ARM provides idle-state node to define the cpuidle states, as defined in [1].
4 cpuidle-qcom is the cpuidle driver for Qualcomm SoCs and uses these idle
5 states. Idle states have different enter/exit latency and residency values.
6 The idle states supported by the QCOM SoC are defined as -
31 state. Retention may have a slightly higher latency than Standby.
44 code in the EL for the SoC. On SoCs with write-back L1 cache, the cache has to
50 be flushed, system bus, clocks - lowered, and SoC main XO clock gated and
52 power modes possible at this state is vast, the exit latency and the residency
58 The idle-state for QCOM SoCs are distinguished by the compatible property of
59 the idle-states device node.
[all …]
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| /kernel/linux/linux-5.10/Documentation/devicetree/bindings/arm/msm/ |
| D | qcom,idle-state.txt | 3 ARM provides idle-state node to define the cpuidle states, as defined in [1].
4 cpuidle-qcom is the cpuidle driver for Qualcomm SoCs and uses these idle
5 states. Idle states have different enter/exit latency and residency values.
6 The idle states supported by the QCOM SoC are defined as -
31 state. Retention may have a slightly higher latency than Standby.
44 code in the EL for the SoC. On SoCs with write-back L1 cache, the cache has to
50 be flushed, system bus, clocks - lowered, and SoC main XO clock gated and
52 power modes possible at this state is vast, the exit latency and the residency
58 The idle-state for QCOM SoCs are distinguished by the compatible property of
59 the idle-states device node.
[all …]
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| /kernel/linux/linux-4.19/tools/testing/selftests/ftrace/test.d/preemptirq/ |
| D | irqsoff_tracer.tc | 2 # SPDX-License-Identifier: GPL-2.0
23 grep -q "preemptoff" available_tracers || unsup "preemptoff tracer not enabled"
24 grep -q "irqsoff" available_tracers || unsup "irqsoff tracer not enabled"
41 grep -q "tracer: preemptoff" trace || fail
44 egrep -q "5.....us : <stack trace>" trace || fail
46 # Check for 500ms of latency
47 egrep -q "latency: 5..... us" trace || fail
64 grep -q "tracer: irqsoff" trace || fail
67 egrep -q "5.....us : <stack trace>" trace || fail
69 # Check for 500ms of latency
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| /kernel/linux/linux-5.10/tools/testing/selftests/ftrace/test.d/preemptirq/ |
| D | irqsoff_tracer.tc | 2 # SPDX-License-Identifier: GPL-2.0
46 grep -q "tracer: preemptoff" trace || fail
49 egrep -q "5.....us : <stack trace>" trace || fail
51 # Check for 500ms of latency
52 egrep -q "latency: 5..... us" trace || fail
69 grep -q "tracer: irqsoff" trace || fail
72 egrep -q "5.....us : <stack trace>" trace || fail
74 # Check for 500ms of latency
75 egrep -q "latency: 5..... us" trace || fail
78 exit 0
|
| /kernel/linux/linux-4.19/drivers/cpuidle/governors/ |
| D | menu.c | 2 * menu.c - the menu idle governor
4 * Copyright (C) 2006-2007 Adam Belay <abelay@novell.com>
26 * If (MAX_INTERESTING-1) * RESOLUTION > UINT_MAX, the result of
48 * 3) Latency tolerance (from pmqos infrastructure)
52 * -----------------------
53 * C state entry and exit have an energy cost, and a certain amount of time in
55 * provides us this duration in the "target_residency" field. So all that we
80 * Repeatable-interval-detector
81 * ----------------------------
91 * ---------------------------
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| /kernel/linux/linux-5.10/drivers/cpuidle/governors/ |
| D | menu.c | 1 // SPDX-License-Identifier: GPL-2.0-only
3 * menu.c - the menu idle governor
5 * Copyright (C) 2006-2007 Adam Belay <abelay@novell.com>
36 * 3) Latency tolerance (from pmqos infrastructure)
40 * -----------------------
41 * C state entry and exit have an energy cost, and a certain amount of time in
43 * provides us this duration in the "target_residency" field. So all that we
68 * Repeatable-interval-detector
69 * ----------------------------
79 * ---------------------------
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| /kernel/linux/linux-5.10/Documentation/trace/ |
| D | ftrace.rst | 2 ftrace - Function Tracer
13 - Written for: 2.6.28-rc2
14 - Updated for: 3.10
15 - Updated for: 4.13 - Copyright 2017 VMware Inc. Steven Rostedt
16 - Converted to rst format - Changbin Du <changbin.du@intel.com>
19 ------------
24 performance issues that take place outside of user-space.
28 There's latency tracing to examine what occurs between interrupts
41 ----------------------
43 See :doc:`ftrace-design` for details for arch porters and such.
[all …]
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| /kernel/linux/linux-4.19/Documentation/trace/ |
| D | ftrace.rst | 2 ftrace - Function Tracer
13 - Written for: 2.6.28-rc2
14 - Updated for: 3.10
15 - Updated for: 4.13 - Copyright 2017 VMware Inc. Steven Rostedt
16 - Converted to rst format - Changbin Du <changbin.du@intel.com>
19 ------------
24 performance issues that take place outside of user-space.
28 There's latency tracing to examine what occurs between interrupts
41 ----------------------
43 See :doc:`ftrace-design` for details for arch porters and such.
[all …]
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| /kernel/linux/linux-5.10/arch/arm64/boot/dts/arm/ |
| D | juno-r2.dts | 9 /dts-v1/;
11 #include <dt-bindings/interrupt-controller/arm-gic.h>
12 #include "juno-base.dtsi"
13 #include "juno-cs-r1r2.dtsi"
17 compatible = "arm,juno-r2", "arm,juno", "arm,vexpress";
18 interrupt-parent = <&gic>;
19 #address-cells = <2>;
20 #size-cells = <2>;
27 stdout-path = "serial0:115200n8";
31 compatible = "arm,psci-0.2";
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| D | juno.dts | 4 * Copyright (c) 2013-2014 ARM Ltd.
9 /dts-v1/;
11 #include <dt-bindings/interrupt-controller/arm-gic.h>
12 #include "juno-base.dtsi"
17 interrupt-parent = <&gic>;
18 #address-cells = <2>;
19 #size-cells = <2>;
26 stdout-path = "serial0:115200n8";
30 compatible = "arm,psci-0.2";
35 #address-cells = <2>;
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| D | juno-r1.dts | 9 /dts-v1/;
11 #include <dt-bindings/interrupt-controller/arm-gic.h>
12 #include "juno-base.dtsi"
13 #include "juno-cs-r1r2.dtsi"
17 compatible = "arm,juno-r1", "arm,juno", "arm,vexpress";
18 interrupt-parent = <&gic>;
19 #address-cells = <2>;
20 #size-cells = <2>;
27 stdout-path = "serial0:115200n8";
31 compatible = "arm,psci-0.2";
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| /kernel/linux/linux-4.19/arch/arm64/boot/dts/arm/ |
| D | juno-r2.dts | 9 /dts-v1/;
11 #include <dt-bindings/interrupt-controller/arm-gic.h>
12 #include "juno-base.dtsi"
13 #include "juno-cs-r1r2.dtsi"
17 compatible = "arm,juno-r2", "arm,juno", "arm,vexpress";
18 interrupt-parent = <&gic>;
19 #address-cells = <2>;
20 #size-cells = <2>;
27 stdout-path = "serial0:115200n8";
31 compatible = "arm,psci-0.2";
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| D | juno-r1.dts | 9 /dts-v1/;
11 #include <dt-bindings/interrupt-controller/arm-gic.h>
12 #include "juno-base.dtsi"
13 #include "juno-cs-r1r2.dtsi"
17 compatible = "arm,juno-r1", "arm,juno", "arm,vexpress";
18 interrupt-parent = <&gic>;
19 #address-cells = <2>;
20 #size-cells = <2>;
27 stdout-path = "serial0:115200n8";
31 compatible = "arm,psci-0.2";
[all …]
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