Home
last modified time | relevance | path

Searched +full:c +full:- +full:states (Results 1 – 25 of 1032) sorted by relevance

12345678910>>...42

/openbmc/linux/Documentation/admin-guide/pm/
H A Dintel_idle.rst1 .. SPDX-License-Identifier: GPL-2.0
24 Documentation/admin-guide/pm/cpuidle.rst if you have not done that yet.]
28 processor's functional blocks into low-power states. That instruction takes two
38 only way to pass early-configuration-time parameters to it is via the kernel
42 .. _intel-idle-enumeration-of-states:
44 Enumeration of Idle 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
[all …]
H A Dintel_pstate.rst1 .. SPDX-License-Identifier: GPL-2.0
22 Documentation/admin-guide/pm/cpufreq.rst if you have not done that yet.]
24 For the processors supported by ``intel_pstate``, the P-state concept is broader
27 information about that). For this reason, the representation of P-states used
32 ``intel_pstate`` maps its internal representation of P-states to frequencies too
38 Since the hardware P-state selection interface used by ``intel_pstate`` is
43 time the corresponding CPU is taken offline and need to be re-initialized when
47 only way to pass early-configuration-time parameters to it is via the kernel
66 -----------
69 hardware-managed P-states (HWP) support. If it works in this mode, the
[all …]
H A Dsleep-states.rst1 .. SPDX-License-Identifier: GPL-2.0
5 System Sleep States
13 Sleep states are global low-power states of the entire system in which user
18 Sleep States That Can Be Supported
22 the Linux kernel can support up to four system sleep states, including
23 hibernation and up to three variants of system suspend. The sleep states that
28 Suspend-to-Idle
29 ---------------
31 This is a generic, pure software, light-weight variant of system suspend (also
34 I/O devices into low-power states (possibly lower-power than available in the
[all …]
/openbmc/linux/drivers/cpuidle/
H A Ddt_idle_genpd.c1 // SPDX-License-Identifier: GPL-2.0-only
5 * Copyright (C) 2019 Linaro Ltd.
8 * Copyright (c) 2021 Western Digital Corporation or its affiliates.
9 * Copyright (c) 2022 Ventana Micro Systems Inc.
12 #define pr_fmt(fmt) "dt-idle-genpd: " fmt
26 struct genpd_power_state *states, int state_count) in pd_parse_state_nodes() argument
32 ret = parse_state(to_of_node(states[i].fwnode), &state); in pd_parse_state_nodes()
38 ret = -ENOMEM; in pd_parse_state_nodes()
42 states[i].data = state_buf; in pd_parse_state_nodes()
48 i--; in pd_parse_state_nodes()
[all …]
H A Dcpuidle-riscv-sbi.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * RISC-V SBI CPU idle driver.
5 * Copyright (c) 2021 Western Digital Corporation or its affiliates.
6 * Copyright (c) 2022 Ventana Micro Systems Inc.
9 #define pr_fmt(fmt) "cpuidle-riscv-sbi: " fmt
33 u32 *states; member
52 data->available = true; in sbi_set_domain_state()
53 data->state = state; in sbi_set_domain_state()
60 return data->state; in sbi_get_domain_state()
67 data->available = false; in sbi_clear_domain_state()
[all …]
H A DKconfig.arm1 # SPDX-License-Identifier: GPL-2.0-only
12 It provides a generic idle driver whose idle states are configured
13 at run-time through DT nodes. The CPUidle suspend backend is
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
33 being shared among a group of CPUs (aka cluster idle states).
44 idle states.
[all …]
H A Dcpuidle-zynq.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 2012-2013 Xilinx
7 * based on arch/arm/mach-at91/cpuidle.c
9 * The cpu idle uses wait-for-interrupt and RAM self refresh in order
10 * to implement two idle states -
11 * #1 wait-for-interrupt
12 * #2 wait-for-interrupt and RAM self refresh
24 /* Actual code that puts the SoC in different idle states */
37 .states = {
51 /* Initialize CPU idle by registering the idle states */
[all …]
H A Ddt_idle_states.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * DT idle states parsing code.
5 * Copyright (C) 2014 ARM Ltd.
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()
[all …]
/openbmc/linux/Documentation/driver-api/pm/
H A Dcpuidle.rst1 .. SPDX-License-Identifier: GPL-2.0
25 However, there may be multiple different idle states that can be used in such a
35 units: *governors* responsible for selecting idle states to ask the processor
53 containing four callback pointers, :c:member:`enable`, :c:member:`disable`,
54 :c:member:`select`, :c:member:`reflect`, a :c:member:`rating` field described
58 with the ``CPUIdle`` core by calling :c:func:`cpuidle_register_governor()` with
62 :c:member:`rating` field is greater than the value of that field for the
75 :c:member:`enable`
85 struct cpuidle_state objects representing idle states that the
89 code, and that causes the kernel to run the architecture-specific
[all …]
H A Ddevices.rst1 .. SPDX-License-Identifier: GPL-2.0
10 :Copyright: |copy| 2010-2011 Rafael J. Wysocki <rjw@sisk.pl>, Novell Inc.
18 management (PM) code is also driver-specific. Most drivers will do very
22 This writeup gives an overview of how drivers interact with system-wide
25 background for the domain-specific work you'd do with any specific driver.
31 Drivers will use one or both of these models to put devices into low-power
32 states:
36 Drivers can enter low-power states as part of entering system-wide
37 low-power states like "suspend" (also known as "suspend-to-RAM"), or
39 "suspend-to-disk").
[all …]
/openbmc/linux/tools/power/cpupower/man/
H A Dcpupower-idle-set.11 .TH "CPUPOWER-IDLE-SET" "1" "0.1" "" "cpupower Manual"
4 cpupower\-idle\-set \- Utility to set cpu idle state specific kernel options
7 cpupower [ \-c cpulist ] idle\-set [\fIoptions\fP]
10 The cpupower idle\-set subcommand allows to set cpu idle, also called cpu
12 sleep states. This can be handy for power vs performance tuning.
16 \fB\-d\fR \fB\-\-disable\fR <STATE_NO>
19 \fB\-e\fR \fB\-\-enable\fR <STATE_NO>
22 \fB\-D\fR \fB\-\-disable-by-latency\fR <LATENCY>
23 Disable all idle states with a equal or higher latency than <LATENCY>.
25 Enable all idle states with a latency lower than <LATENCY>.
[all …]
H A Dcpupower-idle-info.11 .TH "CPUPOWER-IDLE-INFO" "1" "0.1" "" "cpupower Manual"
4 cpupower\-idle\-info \- Utility to retrieve cpu idle kernel information
7 cpupower [ \-c cpulist ] idle\-info [\fIoptions\fP]
14 \fB\-f\fR \fB\-\-silent\fR
15 Only print a summary of all available C-states in the system.
17 \fB\-e\fR \fB\-\-proc\fR
23 .SH IDLE\-INFO DESCRIPTIONS
28 good overview about the usage and availability of processor sleep states on
31 Be aware that the sleep states as exported by the hardware or BIOS and used by
37 which monitor the duration of sleep states the processor resided in. The
[all …]
H A Dcpupower-set.11 .TH CPUPOWER\-SET "1" "22/02/2011" "" "cpupower Manual"
3 cpupower\-set \- Set processor power related kernel or hardware configurations
6 .B cpupower set [ \-b VAL ]
15 described in the cpupower(1) manpage in the \-\-cpu option section. Whether an
24 \-\-perf-bias, \-b
30 The range of valid numbers is 0-15, where 0 is maximum
33 The processor uses this information in model-specific ways
34 when it must select trade-offs between performance and
37 This policy hint does not supersede Processor Performance states
38 (P-states) or CPU Idle power states (C-states), but allows
[all …]
H A Dcpupower-monitor.11 .TH CPUPOWER\-MONITOR "1" "22/02/2011" "" "cpupower Manual"
3 cpupower\-monitor \- Report processor frequency and idle statistics
7 .RB "\-l"
10 .RB [ -c ] [ "\-m <mon1>," [ "<mon2>,..." ] ]
11 .RB [ "\-i seconds" ]
14 .RB [ -c ][ "\-m <mon1>," [ "<mon2>,..." ] ]
18 \fBcpupower-monitor \fP reports processor topology, frequency and idle power
22 \fBcpupower-monitor \fP implements independent processor sleep state and
24 directly reading out hardware registers. Use \-l to get an overview which are
29 \-l
[all …]
/openbmc/linux/drivers/cpuidle/governors/
H A Dladder.c2 * ladder.c - the residency ladder algorithm
4 * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
5 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
6 * Copyright (C) 2004, 2005 Dominik Brodowski <linux@brodo.de>
8 * (C) 2006-2007 Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
40 struct ladder_device_state states[CPUIDLE_STATE_MAX]; member
46 * ladder_do_selection - prepares private data for a state change
55 ldev->states[old_idx].stats.promotion_count = 0; in ladder_do_selection()
56 ldev->states[old_idx].stats.demotion_count = 0; in ladder_do_selection()
57 dev->last_state_idx = new_idx; in ladder_do_selection()
[all …]
H A Dmenu.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * menu.c - the menu idle governor
5 * Copyright (C) 2006-2007 Adam Belay <abelay@novell.com>
6 * Copyright (C) 2009 Intel Corporation
34 * For the menu governor, there are 3 decision factors for picking a C
42 * -----------------------
43 * C state entry and exit have an energy cost, and a certain amount of time in
44 * the C state is required to actually break even on this cost. CPUIDLE
70 * Repeatable-interval-detector
71 * ----------------------------
[all …]
/openbmc/linux/drivers/acpi/
H A Dprocessor_idle.c1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * processor_idle - idle state submodule to the ACPI processor driver
5 * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
6 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
7 * Copyright (C) 2004, 2005 Dominik Brodowski <linux@brodo.de>
8 * Copyright (C) 2004 Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
9 * - Added processor hotplug support
10 * Copyright (C) 2005 Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
11 * - Added support for C3 on SMP
31 * creating an empty asm-ia64/apic.h would just trade pest vs. cholera.
[all …]
/openbmc/linux/drivers/regulator/
H A Dgpio-regulator.c1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * gpio-regulator.c
7 * based on fixed.c
13 * Copyright (c) 2009 Nokia Corporation
14 * Roger Quadros <ext-roger.quadros@nokia.com>
17 * non-controllable regulators, as well as for allowing testing on
28 #include <linux/regulator/gpio-regulator.h>
39 struct gpio_regulator_state *states; member
50 for (ptr = 0; ptr < data->nr_states; ptr++) in gpio_regulator_get_value()
51 if (data->states[ptr].gpios == data->state) in gpio_regulator_get_value()
[all …]
/openbmc/linux/arch/x86/kernel/acpi/
H A Dcstate.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 2005 Intel Corporation
5 * - Added _PDC for SMP C-states on Intel CPUs
22 * - When cache is not shared among all CPUs, we flush cache
24 * - When cache is shared among all CPUs, we use bm_check
32 struct cpuinfo_x86 *c = &cpu_data(cpu); in acpi_processor_power_init_bm_check() local
34 flags->bm_check = 0; in acpi_processor_power_init_bm_check()
36 flags->bm_check = 1; in acpi_processor_power_init_bm_check()
37 else if (c->x86_vendor == X86_VENDOR_INTEL) { in acpi_processor_power_init_bm_check()
43 flags->bm_check = 1; in acpi_processor_power_init_bm_check()
[all …]
/openbmc/linux/drivers/idle/
H A Dintel_idle.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * intel_idle.c - native hardware idle loop for modern Intel processors
5 * Copyright (c) 2013 - 2020, Intel Corporation.
20 * All CPUs have same idle states as boot CPU
23 * for preventing entry into deep C
[all...]
/openbmc/linux/drivers/cpufreq/
H A Dia64-acpi-cpufreq.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * This file provides the ACPI based P-state support. This
6 * (arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c)
8 * Copyright (C) 2005 Intel Corp
28 MODULE_DESCRIPTION("ACPI Processor P-States Driver");
59 return -ENODEV; in processor_set_pstate()
86 /* To be used only after data->acpi_data is initialized */
96 for (i = 0; i < data->acpi_data.state_count; i++) { in extract_clock()
97 if (value == data->acpi_data.states[i].status) in extract_clock()
98 return data->acpi_data.states[i].core_frequency; in extract_clock()
[all …]
/openbmc/linux/Documentation/trace/rv/
H A Ddeterministic_automata.rst10 - *X* is the set of states;
11 - *E* is the finite set of events;
12 - x\ :subscript:`0` is the initial state;
13 - X\ :subscript:`m` (subset of *X*) is the set of marked (or final) states.
14 - *f* : *X* x *E* -> *X* $ is the transition function. It defines the state
22 - *X* = { ``preemptive``, ``non_preemptive``}
23 - *E* = { ``preempt_enable``, ``preempt_disable``, ``sched_waking``}
24 - x\ :subscript:`0` = ``preemptive``
25 - X\ :subscript:`m` = {``preemptive``}
26 - *f* =
[all …]
/openbmc/openbmc/poky/meta/files/common-licenses/
H A DDSDP3 (C) COPYRIGHT 2004 UNIVERSITY OF CHICAGO
5 This program discloses material protectable under copyright laws of the United States. Permission t…
13 …Any questions or comments on the software may be directed to benson@mcs.anl.gov or yinyu-ye@stanfo…
15 …nne National Laboratory with facilities in the states of Illinois and Idaho, is owned by The Unite…
18 …STATES GOVERNMENT. NEITHER THE UNITED STATES GOVERNMENT NOR ANY AGENCY THEREOF, NOR THE UNIVERSITY…
/openbmc/linux/tools/verification/dot2/
H A Ddot2c.py2 # SPDX-License-Identifier: GPL-2.0-only
4 # Copyright (C) 2019-2022 Red Hat, Inc. Daniel Bristot de Oliveira <bristot@kernel.org>
6 # dot2c: parse an automata in dot file digraph format into a C
20 enum_states_def = "states"
36 return string[:-1]
41 for state in self.states:
89 if self.states.__len__() > 255:
92 if self.states.__len__() > 65535:
95 if self.states.__len__() > 1000000:
96 raise Exception("Too many states: %d" % self.states.__len__())
[all …]
H A Dautomata.py2 # SPDX-License-Identifier: GPL-2.0-only
4 # Copyright (C) 2019-2022 Red Hat, Inc. Daniel Bristot de Oliveira <bristot@kernel.org>
26 self.states, self.initial_state, self.final_states = self.__get_state_variables()
80 states = []
89 raw_state = line[-1]
91 # "enabled_fired"}; -> enabled_fired
96 states.append(state)
107 states = sorted(set(states))
108 states.remove(initial_state)
110 # Insert the initial state at the bein og the states
[all …]

12345678910>>...42