| /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
27 - Running
28 - Idle_standby
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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-6.6/Documentation/devicetree/bindings/cpu/ |
| D | idle-states.yaml | 1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/cpu/idle-states.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
11 - Anup Patel <anup@brainfault.org>
15 1 - Introduction
18 ARM and RISC-V systems contain HW capable of managing power consumption
19 dynamically, where cores can be put in different low-power states (ranging
22 run-time, can be specified through device tree bindings representing the
[all …]
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| /kernel/linux/linux-6.6/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)-":
29 const: domain-idle-state
31 entry-latency-us:
33 The worst case latency in microseconds required to enter the idle
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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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| /kernel/linux/linux-5.10/kernel/ |
| D | latencytop.c | 1 // SPDX-License-Identifier: GPL-2.0-only
3 * latencytop.c: Latency display infrastructure
10 * CONFIG_LATENCYTOP enables a kernel latency tracking infrastructure that is
11 * used by the "latencytop" userspace tool. The latency that is tracked is not
12 * the 'traditional' interrupt latency (which is primarily caused by something
13 * else consuming CPU), but instead, it is the latency an application encounters
17 * 1) System level latency
18 * 2) Per process latency
20 * The latency is stored in fixed sized data structures in an accumulated form;
21 * if the "same" latency cause is hit twice, this will be tracked as one entry
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| /kernel/linux/linux-6.6/kernel/ |
| D | latencytop.c | 1 // SPDX-License-Identifier: GPL-2.0-only
3 * latencytop.c: Latency display infrastructure
10 * CONFIG_LATENCYTOP enables a kernel latency tracking infrastructure that is
11 * used by the "latencytop" userspace tool. The latency that is tracked is not
12 * the 'traditional' interrupt latency (which is primarily caused by something
13 * else consuming CPU), but instead, it is the latency an application encounters
17 * 1) System level latency
18 * 2) Per process latency
20 * The latency is stored in fixed sized data structures in an accumulated form;
21 * if the "same" latency cause is hit twice, this will be tracked as one entry
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| /kernel/linux/linux-5.10/kernel/trace/ |
| D | trace_hwlat.c | 1 // SPDX-License-Identifier: GPL-2.0
3 * trace_hwlat.c - A simple Hardware Latency detector.
20 * Although certain hardware-inducing latencies are necessary (for example,
22 * and remote management) they can wreak havoc upon any OS-level performance
23 * guarantees toward low-latency, especially when the OS is not even made
27 * sampling the built-in CPU timer, looking for discontiguous readings.
31 * environment requiring any kind of low-latency performance
34 * Copyright (C) 2008-2009 Jon Masters, Red Hat, Inc. <jcm@redhat.com>
35 * Copyright (C) 2013-2016 Steven Rostedt, Red Hat, Inc. <srostedt@redhat.com>
78 /* Individual latency samples are stored here when detected. */
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| /kernel/linux/linux-6.6/kernel/trace/ |
| D | trace_hwlat.c | 1 // SPDX-License-Identifier: GPL-2.0
3 * trace_hwlat.c - A simple Hardware Latency detector.
20 * Although certain hardware-inducing latencies are necessary (for example,
22 * and remote management) they can wreak havoc upon any OS-level performance
23 * guarantees toward low-latency, especially when the OS is not even made
27 * sampling the built-in CPU timer, looking for discontiguous readings.
31 * environment requiring any kind of low-latency performance
34 * Copyright (C) 2008-2009 Jon Masters, Red Hat, Inc. <jcm@redhat.com>
35 * Copyright (C) 2013-2016 Steven Rostedt, Red Hat, Inc. <srostedt@redhat.com>
67 static char *thread_mode_str[] = { "none", "round-robin", "per-cpu" };
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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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| /kernel/linux/linux-6.6/drivers/cpuidle/ |
| D | dt_idle_states.c | 1 // SPDX-License-Identifier: GPL-2.0-only
9 #define pr_fmt(fmt) "DT idle-states: " fmt
32 idle_state->enter = match_id->data; in init_state_node()
38 idle_state->enter_s2idle = match_id->data; in init_state_node()
40 err = of_property_read_u32(state_node, "wakeup-latency-us", in init_state_node()
41 &idle_state->exit_latency); in init_state_node()
45 err = of_property_read_u32(state_node, "entry-latency-us", in init_state_node()
48 pr_debug(" * %pOF missing entry-latency-us property\n", in init_state_node()
50 return -EINVAL; in init_state_node()
53 err = of_property_read_u32(state_node, "exit-latency-us", in init_state_node()
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| /kernel/linux/linux-5.10/arch/alpha/lib/ |
| D | ev6-stxncpy.S | 1 /* SPDX-License-Identifier: GPL-2.0 */
3 * arch/alpha/lib/ev6-stxncpy.S
4 * 21264 version contributed by Rick Gorton <rick.gorton@api-networks.com>
6 * Copy no more than COUNT bytes of the null-terminated string from
29 * Furthermore, v0, a3-a5, t11, and $at are untouched.
34 * ftp.digital.com/pub/Digital/info/semiconductor/literature/dsc-library.html
36 * E - either cluster
37 * U - upper subcluster; U0 - subcluster U0; U1 - subcluster U1
38 * L - lower subcluster; L0 - subcluster L0; L1 - subcluster L1
50 doesn't like putting the entry point for a procedure somewhere in the
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| D | ev6-stxcpy.S | 1 /* SPDX-License-Identifier: GPL-2.0 */
3 * arch/alpha/lib/ev6-stxcpy.S
4 * 21264 version contributed by Rick Gorton <rick.gorton@alpha-processor.com>
6 * Copy a null-terminated string from SRC to DST.
21 * Furthermore, v0, a3-a5, t11, and t12 are untouched.
26 * ftp.digital.com/pub/Digital/info/semiconductor/literature/dsc-library.html
28 * E - either cluster
29 * U - upper subcluster; U0 - subcluster U0; U1 - subcluster U1
30 * L - lower subcluster; L0 - subcluster L0; L1 - subcluster L1
42 doesn't like putting the entry point for a procedure somewhere in the
[all …]
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| /kernel/linux/linux-6.6/arch/alpha/lib/ |
| D | ev6-stxncpy.S | 1 /* SPDX-License-Identifier: GPL-2.0 */
3 * arch/alpha/lib/ev6-stxncpy.S
4 * 21264 version contributed by Rick Gorton <rick.gorton@api-networks.com>
6 * Copy no more than COUNT bytes of the null-terminated string from
29 * Furthermore, v0, a3-a5, t11, and $at are untouched.
34 * ftp.digital.com/pub/Digital/info/semiconductor/literature/dsc-library.html
36 * E - either cluster
37 * U - upper subcluster; U0 - subcluster U0; U1 - subcluster U1
38 * L - lower subcluster; L0 - subcluster L0; L1 - subcluster L1
50 doesn't like putting the entry point for a procedure somewhere in the
[all …]
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| D | ev6-stxcpy.S | 1 /* SPDX-License-Identifier: GPL-2.0 */
3 * arch/alpha/lib/ev6-stxcpy.S
4 * 21264 version contributed by Rick Gorton <rick.gorton@alpha-processor.com>
6 * Copy a null-terminated string from SRC to DST.
21 * Furthermore, v0, a3-a5, t11, and t12 are untouched.
26 * ftp.digital.com/pub/Digital/info/semiconductor/literature/dsc-library.html
28 * E - either cluster
29 * U - upper subcluster; U0 - subcluster U0; U1 - subcluster U1
30 * L - lower subcluster; L0 - subcluster L0; L1 - subcluster L1
42 doesn't like putting the entry point for a procedure somewhere in the
[all …]
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| /kernel/linux/linux-6.6/Documentation/devicetree/bindings/arm/ |
| 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:
52 - const: arm,psci-0.2
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| /kernel/linux/linux-6.6/Documentation/devicetree/bindings/cpufreq/ |
| D | nvidia,tegra124-cpufreq.txt | 2 ----------------------------------------------
8 - clocks: Must contain an entry for each entry in clock-names.
9 See ../clocks/clock-bindings.txt for details.
10 - clock-names: Must include the following entries:
11 - cpu_g: Clock mux for the fast CPU cluster.
12 - pll_x: Fast PLL clocksource.
13 - pll_p: Auxiliary PLL used during fast PLL rate changes.
14 - dfll: Fast DFLL clocksource that also automatically scales CPU voltage.
17 - clock-latency: Specify the possible maximum transition latency for clock,
21 --------
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| /kernel/linux/linux-5.10/Documentation/devicetree/bindings/cpufreq/ |
| D | nvidia,tegra124-cpufreq.txt | 2 ----------------------------------------------
8 - clocks: Must contain an entry for each entry in clock-names.
9 See ../clocks/clock-bindings.txt for details.
10 - clock-names: Must include the following entries:
11 - cpu_g: Clock mux for the fast CPU cluster.
12 - pll_x: Fast PLL clocksource.
13 - pll_p: Auxiliary PLL used during fast PLL rate changes.
14 - dfll: Fast DFLL clocksource that also automatically scales CPU voltage.
17 - clock-latency: Specify the possible maximum transition latency for clock,
21 --------
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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-6.6/arch/arm64/boot/dts/qcom/ |
| D | sm4450.dtsi | 1 // SPDX-License-Identifier: BSD-3-Clause
6 #include <dt-bindings/gpio/gpio.h>
7 #include <dt-bindings/interrupt-controller/arm-gic.h>
10 interrupt-parent = <&intc>;
12 #address-cells = <2>;
13 #size-cells = <2>;
18 xo_board: xo-board {
19 compatible = "fixed-clock";
20 clock-frequency = <76800000>;
21 #clock-cells = <0>;
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| /kernel/linux/linux-6.6/kernel/power/ |
| D | qos.c | 1 // SPDX-License-Identifier: GPL-2.0-only
15 * or through a built-in notification mechanism.
18 * global CPU latency QoS requests and frequency QoS requests are provided.
50 * pm_qos_read_value - Return the current effective constraint value.
55 return READ_ONCE(c->target_value); in pm_qos_read_value()
60 if (plist_head_empty(&c->list)) in pm_qos_get_value()
61 return c->no_constraint_value; in pm_qos_get_value()
63 switch (c->type) { in pm_qos_get_value()
65 return plist_first(&c->list)->prio; in pm_qos_get_value()
68 return plist_last(&c->list)->prio; in pm_qos_get_value()
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| /kernel/linux/linux-5.10/kernel/power/ |
| D | qos.c | 1 // SPDX-License-Identifier: GPL-2.0-only
15 * or through a built-in notification mechanism.
18 * global CPU latency QoS requests and frequency QoS requests are provided.
50 * pm_qos_read_value - Return the current effective constraint value.
55 return READ_ONCE(c->target_value); in pm_qos_read_value()
60 if (plist_head_empty(&c->list)) in pm_qos_get_value()
61 return c->no_constraint_value; in pm_qos_get_value()
63 switch (c->type) { in pm_qos_get_value()
65 return plist_first(&c->list)->prio; in pm_qos_get_value()
68 return plist_last(&c->list)->prio; in pm_qos_get_value()
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| /kernel/linux/linux-5.10/Documentation/devicetree/bindings/pci/ |
| D | nvidia,tegra194-pcie.txt | 4 and thus inherits all the common properties defined in designware-pcie.txt.
9 - power-domains: A phandle to the node that controls power to the respective
19 "include/dt-bindings/power/tegra194-powergate.h" file.
20 - reg: A list of physical base address and length pairs for each set of
21 controller registers. Must contain an entry for each entry in the reg-names
23 - reg-names: Must include the following entries:
25 "config": As per the definition in designware-pcie.txt
31 - interrupts: A list of interrupt outputs of the controller. Must contain an
32 entry for each entry in the interrupt-names property.
33 - interrupt-names: Must include the following entries:
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| /kernel/linux/linux-5.10/block/ |
| D | kyber-iosched.c | 1 // SPDX-License-Identifier: GPL-2.0
3 * The Kyber I/O scheduler. Controls latency by throttling queue depths using
11 #include <linux/blk-mq.h>
17 #include "blk-mq.h"
18 #include "blk-mq-debugfs.h"
19 #include "blk-mq-sched.h"
20 #include "blk-mq-tag.h"
54 * Maximum device-wide depth for each scheduling domain.
68 * Default latency targets for each scheduling domain.
89 * to the target latency:
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| /kernel/linux/linux-6.6/block/ |
| D | kyber-iosched.c | 1 // SPDX-License-Identifier: GPL-2.0
3 * The Kyber I/O scheduler. Controls latency by throttling queue depths using
18 #include "blk-mq.h"
19 #include "blk-mq-debugfs.h"
20 #include "blk-mq-sched.h"
54 * Maximum device-wide depth for each scheduling domain.
68 * Default latency targets for each scheduling domain.
89 * to the target latency:
91 * <= 1/4 * target latency
92 * <= 1/2 * target latency
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