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/linux/tools/perf/Documentation/
H A Dperf-kwork.txt1 perf-kwork(1)
5 ----
6 perf-kwork - Tool to trace/measure kernel work properties (latencies)
9 --------
14 -----------
29 perf kwork record -- sleep 1
31 perf kwork report -b
33 perf kwork latency -b
36 perf kwork top -b
39 including the run time and delay (time between raise and actually entry):
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H A Dperf-ftrace.txt1 perf-ftrace(1)
5 ----
6 perf-ftrace - simple wrapper for kernel's ftrace functionality
10 --------
15 -----------
27 total, average, max time and the number of calls.
32 --------------
34 -p::
35 --pid=::
38 --tid=::
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H A Dperf-stat.txt1 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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H A Dperf-top.txt1 perf-top(1)
5 ----
6 perf-top - System profiling tool.
9 --------
11 'perf top' [-e <EVENT> | --event=EVENT] [<options>]
14 -----------
15 This command generates and displays a performance counter profile in real time.
19 -------
20 -a::
21 --all-cpus::
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/linux/drivers/mfd/
H A Ducb1x00-ts.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * Touchscreen driver for UCB1x00-based touchscreens
8 * 21-Jan-2002 <jco@ict.es> :
24 #include <linux/delay.h>
34 #include <asm/mach-types.h>
56 struct input_dev *idev = ts->idev; in ucb1x00_ts_evt_add()
67 struct input_dev *idev = ts->idev; in ucb1x00_ts_event_release()
79 ucb1x00_reg_write(ts->ucb, UCB_TS_CR, in ucb1x00_ts_mode_int()
92 ucb1x00_io_write(ts->ucb, COLLIE_TC35143_GPIO_TBL_CHK, 0); in ucb1x00_ts_read_pressure()
93 ucb1x00_reg_write(ts->ucb, UCB_TS_CR, in ucb1x00_ts_read_pressure()
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/linux/drivers/gpu/drm/i915/
H A Di915_file_private.h1 /* SPDX-License-Identifier: MIT */
41 * at any time while the later happens as part of
46 * In order to swap out the VM, for instance, we have to delay
47 * until all current in-flight work is complete, swap in the new
55 * has the same u32 context ID the whole time. From the
58 * the proto-context can't handle. Then the struct i915_gem_context
64 * it NULL, and place the proto-context in the corresponding slot
69 * context and kill the proto-context.
76 * fast-path anyway.
96 * will fail. This is a stop gap measure to limit the badly behaving
/linux/arch/arm/boot/dts/nxp/imx/
H A Dimx6ul-var-som.dtsi1 // SPDX-License-Identifier: GPL-2.0+
3 * Support for Variscite VAR-SOM-MX6UL Module
9 /dts-v1/;
12 #include <dt-bindings/clock/imx6ul-clock.h>
13 #include <dt-bindings/gpio/gpio.h>
16 model = "Variscite VAR-SOM-MX6UL module";
17 compatible = "variscite,var-som-imx6ul", "fsl,imx6ul";
24 reg_gpio_dvfs: reg-gpio-dvfs {
25 compatible = "regulator-gpio";
26 regulator-min-microvolt = <1300000>;
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H A Dimx6ull-engicam-microgea-bmm.dts1 // SPDX-License-Identifier: GPL-2.0
7 /dts-v1/;
9 #include "imx6ull-engicam-microgea.dtsi"
12 compatible = "engicam,microgea-imx6ull-bmm",
13 "engicam,microgea-imx6ull", "fsl,imx6ull";
17 compatible = "pwm-backlight";
18 brightness-levels = <0 100>;
19 num-interpolated-steps = <100>;
20 default-brightness-level = <85>;
25 compatible = "pwm-beeper";
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H A Dimx6ul-imx6ull-opos6uldev.dtsi1 // SPDX-License-Identifier: GPL-2.0 OR MIT
7 stdout-path = &uart1;
11 compatible = "pwm-backlight";
13 brightness-levels = <0 4 8 16 32 64 128 255>;
14 default-brightness-level = <7>;
15 power-supply = <&reg_5v>;
19 gpio-keys {
20 compatible = "gpio-keys";
21 pinctrl-names = "default";
22 pinctrl-0 = <&pinctrl_gpio_keys>;
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H A Dimx6ul-geam.dts1 // SPDX-License-Identifier: GPL-2.0 OR X11
7 /dts-v1/;
9 #include <dt-bindings/gpio/gpio.h>
10 #include <dt-bindings/input/input.h>
15 compatible = "engicam,imx6ul-geam", "fsl,imx6ul";
23 compatible = "pwm-backlight";
25 brightness-levels = < 0 1 2 3 4 5 6 7 8 9
36 default-brightness-level = <100>;
40 stdout-path = &uart1;
43 reg_1p8v: regulator-1p8v {
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/linux/Documentation/devicetree/bindings/display/panel/
H A Dpanel-edp.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/display/panel/panel-edp.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Douglas Anderson <dianders@chromium.org>
14 to a Embedded DisplayPort AUX bus (see display/dp-aux-bus.yaml) without
17 board, either for second-sourcing purposes or to support multiple SKUs
51 :<T1>:<T2>: :<--T10-->:<T11>:<T12>:
52 : +-----------------------+---------+---------+
53 eDP -----------+ Black video | Src vid | Blk vid +
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/linux/drivers/input/touchscreen/
H A Dads7846.c1 // SPDX-License-Identifier: GPL-2.0-only
10 * - corgi_ts.c
11 * Copyright (C) 2004-2005 Richard Purdie
12 * - omap_ts.[hc], ads7846.h, ts_osk.c
21 #include <linux/delay.h>
39 * Support for ads7843 tested on Atmel at91sam926x-EK.
53 * note. The strength of filtering can be set in the board-* specific
57 #define TS_POLL_DELAY 1 /* ms delay before the first sample */
58 #define TS_POLL_PERIOD 5 /* ms delay between samples */
76 * driver is used with DMA-based SPI controllers (like atmel_spi) on
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/linux/Documentation/filesystems/nfs/
H A Dknfsd-stats.rst5 :Authors: Greg Banks <gnb@sgi.com> - 26 Mar 2009
13 program from the nfs-utils distribution provides a helpful command-line
48 packets-arrived
58 However this is a more accurate and less workload-dependent measure
62 sockets-enqueued
68 network-facing work to be done but it couldn't be done immediately,
69 thus introducing a small delay in servicing NFS calls. The ideal
70 rate of change for this counter is zero; significantly non-zero
74 pool for the NFS workload (the workload is thread-limited), in which
78 threads-woken
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/linux/drivers/iio/humidity/
H A Dsi7020.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * si7020.c - Silicon Labs Si7013/20/21 Relative Humidity and Temp Sensors
20 #include <linux/delay.h>
31 /* Measure Relative Humidity, Hold Master Mode */
33 /* Measure Temperature, Hold Master Mode */
63 if (chan->type == IIO_CURRENT) { in si7020_read_raw()
64 *val = data->heater_reg; in si7020_read_raw()
68 ret = i2c_smbus_read_word_swapped(data->client, in si7020_read_raw()
69 chan->type == IIO_TEMP ? in si7020_read_raw()
76 * Humidity values can slightly exceed the 0-100%RH in si7020_read_raw()
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/linux/include/linux/
H A Dwm97xx.h1 /* SPDX-License-Identifier: GPL-2.0 */
59 #define WM97XX_DELAY(i) ((i << 4) & 0x00f0) /* sample delay times */
62 #define WM97XX_SLT(i) ((i - 5) & 0x7) /* panel slot (5-11) */
71 #define WM9712_45W 0x1000 /* set for 5-wire touchscreen */
72 #define WM9712_PDEN 0x0800 /* measure only when pen down */
86 #define WM9705_PDEN 0x1000 /* measure only when pen is down */
108 #define WM9713_PDEN 0x0800 /* measure only when pen down */
143 #define AC97_LINK_FRAME 21 /* time in uS for AC97 link frame */
146 /*---------------- Return codes from sample reading functions ---------------*/
160 * The wm97xx driver provides a private API for writing platform-specific
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/linux/net/netfilter/ipvs/
H A Dip_vs_est.c1 // SPDX-License-Identifier: GPL-2.0-or-later
30 seconds) for virtual services and real servers. For measure rate in a
32 periodically reads those statistical counters and measure rate.
34 We measure rate during the last 8 seconds every 2 seconds:
36 avgrate = avgrate*(1-W) + rate*W
38 where W = 2^(-
397 int delay = est->ktrow; ip_vs_enqueue_estimator() local
744 int id, row, cid, delay; ip_vs_est_calc_phase() local
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/linux/arch/arm/boot/dts/st/
H A Dste-hrefv60plus.dtsi1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Copyright 2012 ST-Ericsson AB
6 #include "ste-href.dtsi"
9 model = "ST-Ericsson HREF (v60+) platform with Device Tree";
10 compatible = "st-ericsson,hrefv60+", "st-ericsson,u8500";
12 thermal-zones {
13 chassis-thermal {
15 polling-delay = <20000>;
17 polling-delay-passive = <2000>;
19 thermal-sensors = <&therm1>, <&therm2>;
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/linux/drivers/comedi/drivers/
H A Dadl_pci9118.c1 // SPDX-License-Identifier: GPL-2.0
6 * card: PCI-9118DG, PCI-9118HG, PCI-9118HR
15 * Description: Adlink PCI-9118DG, PCI-9118HG, PCI-9118HR
17 * Devices: [ADLink] PCI-9118DG (pci9118dg), PCI-9118HG (pci9118hg),
18 * PCI-9118HR (pci9118hr)
25 * - If cmd->scan_begin_src=TRIG_EXT then trigger input is TGIN (pin 46).
26 * - If cmd->convert_src=TRIG_EXT then trigger input is EXTTRG (pin 44).
27 * - If cmd->start_src/stop_src=TRIG_EXT then trigger input is TGIN (pin 46).
28 * - It is not necessary to have cmd.scan_end_arg=cmd.chanlist_len but
30 * - If return value of cmdtest is 5 then you've bad channel list
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/linux/Documentation/trace/
H A Dtimerlat-tracer.rst6 find sources of wakeup latencies of real-time threads. Like cyclictest,
9 time* and the *absolute time* that the timer was set to expire. The main
13 -----
28 # _-----=> irqs-off
29 # / _----=> need-resched
30 # | / _---=> hardirq/softirq
31 # || / _--=> preempt-depth
34 # TASK-PID CPU# |||| TIMESTAMP ID CONTEXT LATENCY
36 <idle>-0 [000] d.h1 54.029328: #1 context irq timer_latency 932 ns
37 <...>-867 [000] .... 54.029339: #1 context thread timer_latency 11700 ns
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/linux/drivers/leds/
H A Dleds-lp5523.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * lp5523.c - LP5523, LP55231 LED Driver
13 #include <linux/delay.h>
20 #include <linux/platform_data/leds-lp55xx.h>
23 #include "leds-lp55xx-common.h"
88 /* Chip startup time is 500 us, 1 - 2 ms gives some margin */ in lp5523_post_init_device()
92 val |= (chip->pdata->charge_pump_mode << LP5523_CP_MODE_SHIFT) & LP5523_CP_MODE_MASK; in lp5523_post_init_device()
150 chip->engine_idx = i; in lp5523_init_program_engine()
155 pattern[i - 1][j]); in lp5523_init_program_engine()
171 dev_err(&chip->cl->dev, in lp5523_init_program_engine()
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/linux/drivers/net/wireless/broadcom/b43/
H A Dphy_n.h1 /* SPDX-License-Identifier: GPL-2.0 */
9 /* N-PHY registers. */
18 #define B43_NPHY_4WI_ADDR B43_PHY_N(0x00B) /* Four-wire bus address */
19 #define B43_NPHY_4WI_DATAHI B43_PHY_N(0x00C) /* Four-wire bus data high */
20 #define B43_NPHY_4WI_DATALO B43_PHY_N(0x00D) /* Four-wire bus data low */
21 #define B43_NPHY_BIST_STAT0 B43_PHY_N(0x00E) /* Built-in self test status 0 */
22 #define B43_NPHY_BIST_STAT1 B43_PHY_N(0x00F) /* Built-in self test status 1 */
310 #define B43_NPHY_TXMACDELAY B43_PHY_N(0x0B4) /* TX MAC delay */
311 #define B43_NPHY_TXFRAMEDELAY B43_PHY_N(0x0B5) /* TX frame delay */
324 #define B43_NPHY_BPHY_CTL2_MACDEL 0x7FE0 /* MAC delay */
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/linux/tools/perf/
H A Dbuiltin-kwork.c1 // SPDX-License-Identifier: GPL-2.0
3 * builtin-kwork.c
26 #include <subcmd/parse-options.h>
27 #include <event-parse.h>
67 if (l->cpu > r->cpu) in id_cmp()
69 if (l->cpu < r->cpu) in id_cmp()
70 return -1; in id_cmp()
72 if (l->id > r->id) in id_cmp()
74 if (l->id < r->id) in id_cmp()
75 return -1; in id_cmp()
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/linux/arch/arm64/boot/dts/rockchip/
H A Drk3399-gru-scarlet.dtsi1 // SPDX-License-Identifier: (GPL-2.0+ OR MIT)
3 * Google Gru-scarlet board device tree source
8 #include "rk3399-gru.dtsi"
11 chassis-type = "tablet";
16 pp1250_s3: regulator-pp1250-s3 {
17 compatible = "regulator-fixed";
18 regulator-name = "pp1250_s3";
21 regulator-always-on;
22 regulator-boot-on;
23 regulator-min-microvolt = <1250000>;
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H A Dpx30-evb.dts1 // SPDX-License-Identifier: (GPL-2.0+ OR MIT)
6 /dts-v1/;
7 #include <dt-bindings/gpio/gpio.h>
8 #include <dt-bindings/input/input.h>
9 #include <dt-bindings/pinctrl/rockchip.h>
14 compatible = "rockchip,px30-evb", "rockchip,px30";
24 stdout-path = "serial5:115200n8";
27 adc-keys {
28 compatible = "adc-keys";
29 io-channels = <&saradc 2>;
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/linux/kernel/rcu/
H A Drcuscale.c1 // SPDX-License-Identifier: GPL-2.0+
3 * Read-Copy Update module-based scalability-test facility
34 #include <linux/delay.h>
46 MODULE_DESCRIPTION("Read-Copy Update module-based scalability-test facility");
50 #define SCALE_FLAG "-scale:"
68 * value specified by nr_cpus for an update-only test.
72 * value specified by nr_cpus for a read-only test.
78 * pessimistic due to the per-critical-section interrupt disabling,
79 * test-end checks, and the pair of calls through pointers.
91 torture_param(int, holdoff, 10, "Holdoff time before test start (s)");
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