| /linux/Documentation/tools/rtla/ |
| H A D | common_osnoise_options.rst | 1 .. |threshold| replace:: **-a/--auto**, **-s/--stop**, or **-S/--stop-total** substdef
2 .. |thresharg| replace:: -s
9 **-a**, **--auto** *us*
12 while debugging the system. It is equivalent to use **-s** *us* **-T 1 -t**.
14 **-p**, **--period** *us*
18 **-r**, **--runtime** *us*
22 **-s**, **--stop** *us*
24 Stop the trace if a single sample is higher than the argument in microseconds.
25 If **-T** is set, it will also save the trace to the output.
27 **-S**, **--stop-total** *us*
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| H A D | common_timerlat_options.rst | 1 .. |threshold| replace:: **-a/--auto**, **-i/--irq**, or **-T/--thread** substdef
2 .. |thresharg| replace:: -T
6 For time-sensitive actions, it is recommended to run **rtla timerlat** with BPF
11 **-a**, **--auto** *us*
14 while debugging the system. It is equivalent to use **-T** *us* **-s** *us*
15 **-t**. By default, *timerlat* tracer uses FIFO:95 for *timerlat* threads,
16 thus equilavent to **-P** *f:95*.
18 **-p**, **--period** *us*
22 **-i**, **--irq** *us*
24 Stop trace if the *IRQ* latency is higher than the argument in us.
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| /linux/Documentation/arch/arm64/ |
| H A D | perf.rst | 1 .. SPDX-License-Identifier: GPL-2.0
13 :Date: 2019-03-06
16 ------------
24 --------------
39 ----------
46 For a non-VHE host this attribute will exclude EL2 as we consider the
55 ----------------------------
59 The KVM host may run at EL0 (userspace), EL1 (non-VHE kernel) and EL2 (VHE
60 kernel or non-VHE hypervisor).
65 exclusively rely on the PMU's hardware exception filtering - therefore we
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| /linux/Documentation/devicetree/bindings/usb/ |
| H A D | snps,dwc3-common.yaml | 1 # SPDX-License-Identifier: GPL-2.0
3 ---
4 $id: http://devicetree.org/schemas/usb/snps,dwc3-common.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Felipe Balbi <balbi@kernel.org>
14 vendor-specific implementation or as a standalone component.
17 - $ref: usb-drd.yaml#
18 - if:
24 - dr_mode
28 $ref: usb-xhci.yaml#
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| H A D | chipidea,usb2-common.yaml | 1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/usb/chipidea,usb2-common.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Xu Yang <xu.yang_2@nxp.com>
25 clock-names:
31 power-domains:
37 reset-names:
40 "#reset-cells":
48 itc-setting:
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| /linux/Documentation/admin-guide/pm/ |
| H A D | intel_uncore_frequency_scaling.rst | 1 .. SPDX-License-Identifier: GPL-2.0
8 :Copyright: |copy| 2022-2023 Intel Corporation
13 ------------
30 ---------------
45 This is a read-only attribute. If users adjust max_freq_khz,
50 This is a read-only attribute. If users adjust min_freq_khz,
63 -----------------------------------------------------------------
128 -------------------------------
132 optimize trade-off between latency and power consumption. For some
139 expecting higher performance at the expense of power. Consider an
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| H A D | intel_pstate.rst | 1 .. 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
25 than just an operating frequency or an operating performance point (see the
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 -----------
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| H A D | cpufreq.rst | 1 .. SPDX-License-Identifier: GPL-2.0
20 Operating Performance Points or P-states (in ACPI terminology). As a rule,
21 the higher the clock frequency and the higher the voltage, the more instructions
22 can be retired by the CPU over a unit of time, but also the higher the clock
23 frequency and the higher the voltage, the more energy is consumed over a unit of
24 time (or the more power is drawn) by the CPU in the given P-state. Therefore
29 as possible and then there is no reason to use any P-states different from the
30 highest one (i.e. the highest-performance frequency/voltage configuration
38 put into different P-states.
41 capacity, so as to decide which P-states to put the CPUs into. Of course, since
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| /linux/Documentation/admin-guide/mm/damon/ |
| H A D | lru_sort.rst | 1 .. SPDX-License-Identifier: GPL-2.0
4 DAMON-based LRU-lists Sorting
7 DAMON-based LRU-lists Sorting (DAMON_LRU_SORT) is a static kernel module that
9 (de)prioritization of pages on their LRU-lists for making LRU-lists a more
12 Where Proactive LRU-lists Sorting is Required?
15 As page-granularity access checking overhead could be significant on huge
23 Because DAMON can identify access patterns of best-effort accuracy while
24 inducing only user-specified range of overhead, proactively running
32 rates that higher than a user-specified threshold) and cold pages (pages of
33 memory regions that showing no access for a time that longer than a
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| /linux/tools/perf/tests/shell/ |
| H A D | record_offcpu.sh | 3 # SPDX-License-Identifier: GPL-2.0
5 set -e
14 rm -f ${perfdata}
15 rm -f ${perfdata}.old
16 trap - EXIT TERM INT
25 test_above_thresh="Threshold test (above threshold)"
26 test_below_thresh="Threshold test (below threshold)"
29 echo "Checking off-cpu privilege"
31 if [ "$(id -u)" != 0 ]
33 echo "off-cpu test [Skipped permission]"
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| /linux/Documentation/hwmon/ |
| H A D | ltc2947.rst | 1 Kernel drivers ltc2947-i2c and ltc2947-spi
10 Addresses scanned: -
14 https://www.analog.com/media/en/technical-documentation/data-sheets/LTC2947.pdf
30 active as soon as a temperature reading is higher than a defined threshold. The
37 The following attributes are supported. Limits are read-write, reset_history
38 is write-only and all the other attributes are read-only.
41 in0_input VP-VM voltage (mV).
42 in0_min Undervoltage threshold
43 in0_max Overvoltage threshold
49 in0_label Channel label (VP-VM)
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| /linux/drivers/thermal/intel/ |
| H A D | intel_pch_thermal.c | 1 // SPDX-License-Identifier: GPL-2.0-only
2 /* intel_pch_thermal.c - Intel PCH Thermal driver
28 #define PCH_THERMAL_DID_CNL_H 0xA379 /* CNL-H PCH */
29 #define PCH_THERMAL_DID_CNL_LP 0x02F9 /* CNL-LP PCH */
30 #define PCH_THERMAL_DID_CML_H 0X06F9 /* CML-H PCH */
34 /* Wildcat Point-LP PCH Thermal registers */
52 /* Wildcat Point-LP PCH Thermal Register bit definitions */
54 #define WPT_TSC_CPDE 0x01 /* Catastrophic Power-Down Enable */
58 #define WPT_TSEL_PLDB 0x80 /* TSEL Policy Lock-Down Bit */
63 /* Resolution of 1/2 degree C and an offset of -50C */
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| /linux/Documentation/admin-guide/blockdev/ |
| H A D | floppy.rst | 19 Example: If your kernel is called linux-2.6.9, type the following line
22 linux-2.6.9 floppy=thinkpad
25 of linux-2.6.9::
31 linux-2.6.9 floppy=daring floppy=two_fdc
96 and is thus harder to find, whereas non-dma buffers may be
101 threshold to 10 or lower, in order to limit the number of data
104 If you have a FIFO-able FDC, the floppy driver automatically
105 falls back on non DMA mode if no DMA-able memory can be found.
120 floppy=<threshold>,fifo_depth
121 Sets the FIFO threshold. This is mostly relevant in DMA
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| H A D | zram.rst | 2 zram: Compressed RAM-based block devices
8 The zram module creates RAM-based block devices named /dev/zram<id>
20 There are several ways to configure and manage zram device(-s):
23 b) using zramctl utility, provided by util-linux (util-linux@vger.kernel.org).
28 In order to get a better idea about zramctl please consult util-linux
29 documentation, zramctl man-page or `zramctl --help`. Please be informed
30 that zram maintainers do not develop/maintain util-linux or zramctl, should
31 you have any questions please contact util-linux@vger.kernel.org
45 -EBUSY an attempt to modify an attribute that cannot be changed once
47 -ENOMEM zram was not able to allocate enough memory to fulfil your
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| /linux/Documentation/devicetree/bindings/power/supply/ |
| H A D | battery.yaml | 1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Sebastian Reichel <sre@kernel.org>
14 In smart batteries, these are typically stored in non-volatile memory
16 no appropriate non-volatile memory, or it is unprogrammed/incorrect.
27 Batteries must be referenced by chargers and/or fuel-gauges using a phandle.
28 The phandle's property should be named "monitored-battery".
32 const: simple-battery
34 device-chemistry:
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| /linux/Documentation/networking/ |
| H A D | ipvs-sysctl.rst | 1 .. SPDX-License-Identifier: GPL-2.0
4 IPvs-sysctl
10 am_droprate - INTEGER
16 amemthresh - INTEGER
19 It sets the available memory threshold (in pages), which is
25 backup_only - BOOLEAN
26 - 0 - disabled (default)
27 - not 0 - enabled
32 conn_reuse_mode - INTEGER
33 1 - default
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| /linux/Documentation/ABI/testing/ |
| H A D | debugfs-scmi | 16 on this SCMI instance <n>, the threshold above which any SCMI
17 command, advertised to have an higher-than-threshold execution
58 Description: Max number of concurrently allowed in-flight SCMI messages for
67 Description: Max number of concurrently allowed in-flight SCMI messages for
|
| /linux/drivers/cpuidle/governors/ |
| H A D | ladder.c | 2 * ladder.c - the residency ladder algorithm
8 * (C) 2006-2007 Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
32 } threshold; member
46 * ladder_do_selection - prepares private data for a state change
56 ldev->states[old_idx].stats.promotion_count = 0; in ladder_do_selection()
57 ldev->states[old_idx].stats.demotion_count = 0; in ladder_do_selection()
58 dev->last_state_idx = new_idx; in ladder_do_selection()
62 * ladder_select_state - selects the next state to enter
72 int last_idx = dev->last_state_idx; in ladder_select_state()
73 int first_idx = drv->states[0].flags & CPUIDLE_FLAG_POLLING ? 1 : 0; in ladder_select_state()
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| /linux/tools/tracing/rtla/src/ |
| H A D | osnoise_top.c | 1 // SPDX-License-Identifier: GPL-2.0
38 * osnoise_free_top - free runtime data
42 free(data->cpu_data); in osnoise_free_top()
48 osnoise_free_top(tool->data); in osnoise_free_top_tool()
52 * osnoise_alloc_histogram - alloc runtime data
62 data->nr_cpus = nr_cpus; in osnoise_alloc_top()
65 data->cpu_data = calloc(1, sizeof(*data->cpu_data) * nr_cpus); in osnoise_alloc_top()
66 if (!data->cpu_data) in osnoise_alloc_top()
77 * osnoise_top_handler - this is the handler for osnoise tracer events
88 int cpu = record->cpu; in osnoise_top_handler()
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| H A D | osnoise_hist.c | 1 // SPDX-License-Identifier: GPL-2.0
37 * osnoise_free_histogram - free runtime data
45 for (cpu = 0; cpu < data->nr_cpus; cpu++) { in osnoise_free_histogram()
46 if (data->hist[cpu].samples) in osnoise_free_histogram()
47 free(data->hist[cpu].samples); in osnoise_free_histogram()
51 if (data->hist) in osnoise_free_histogram()
52 free(data->hist); in osnoise_free_histogram()
59 osnoise_free_histogram(tool->data); in osnoise_free_hist_tool()
63 * osnoise_alloc_histogram - alloc runtime data
75 data->entries = entries; in osnoise_alloc_histogram()
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| /linux/drivers/thermal/ |
| H A D | airoha_thermal.c | 1 // SPDX-License-Identifier: GPL-2.0-or-later
28 /* period unit calculated in BUS clock * 256 scaling-up */
66 * - Fire BIT(1) when lower than EN7581_COLD_THRE
67 * - Fire BIT(0) and BIT(5) when higher than EN7581_HOT2NORMAL_THRE or
105 * - Fire BIT(1) when lower than EN7581_COLD_THRE
106 * - Fire BIT(0) and BIT(5) when higher than EN7581_HOT2NORMAL_THRE or
113 /* Monitor will take the bigger threshold between HOT2NORMAL and HOT
114 * and will fire both HOT2NORMAL and HOT interrupt when higher than the 2
117 * treat COLD threshold as HOT2NORMAL.
124 /* Monitor will use this as HOT2NORMAL (fire interrupt when lower than...)*/
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| /linux/include/linux/input/ |
| H A D | adxl34x.h | 1 /* SPDX-License-Identifier: GPL-2.0-or-later */
34 * acceleration greater than tap_threshold is present during the
48 * holds the threshold value for tap detection/interrupts.
59 * time that an event must be above the tap_threshold threshold
104 * device exceeds the inactivity threshold. Once the reference
125 * holds the threshold value for activity detection.
135 * holds the threshold value for inactivity
152 * result in the function appearing un-responsive if the
153 * inactivity_time register is set with a value less than the time
162 * holds the threshold value for Free-Fall detection.
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| /linux/Documentation/power/ |
| H A D | opp.rst | 5 (C) 2009-2010 Nishanth Menon <nm@ti.com>, Texas Instruments Incorporated
20 -------------------------------------------------
22 Complex SoCs of today consists of a multiple sub-modules working in conjunction.
25 facilitate this, sub-modules in a SoC are grouped into domains, allowing some
27 voltage/frequency pairs that are higher.
41 - {300000000, 1000000}
42 - {800000000, 1200000}
43 - {1000000000, 1300000}
46 ----------------------------------------
57 (users) -> registers a set of default OPPs -> (library)
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| /linux/tools/perf/Documentation/ |
| H A D | perf-stat.txt | 1 perf-stat(1)
5 ----
6 perf-stat - Run a command and gather performance counter statistics
9 --------
11 'perf stat' [-e <EVENT> | --event=EVENT] [-a] <command>
12 'perf stat' [-e <EVENT> | --event=EVENT] [-a] \-- <command> [<options>]
13 'perf stat' [-e <EVENT> | --event=EVENT] [-a] record [-o file] \-- <command> [<options>]
14 'perf stat' report [-i file]
17 -----------
23 -------
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| /linux/Documentation/mm/ |
| H A D | ksm.rst | 5 KSM is a memory-saving de-duplication feature, enabled by CONFIG_KSM=y,
9 The userspace interface of KSM is described in Documentation/admin-guide/mm/ksm.rst
15 --------
17 .. kernel-doc:: mm/ksm.c
21 ---------------
25 If a KSM page is shared between less than ``max_page_sharing`` VMAs,
27 list of struct ksm_rmap_item and the ``page->mapping`` of the
30 When the sharing passes this threshold, KSM adds a second dimension to
33 page with ``page->mapping`` pointing to that "dup".
59 stable_node chain->hlist to check for pruning) and higher
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