| /linux/tools/perf/Documentation/ |
| H A D | perf-amd-ibs.txt | 1 perf-amd-ibs(1)
5 ----
6 perf-amd-ibs - Support for AMD Instruction-Based Sampling (IBS) with perf tool
9 --------
11 'perf record' -e ibs_op//
12 'perf record' -e ibs_fetch//
15 -----------
17 Instruction-Based Sampling (IBS) provides precise Instruction Pointer (IP)
19 Op and IBS Fetch. IBS Op sampling provides information about instruction
20 execution (micro-op execution to be precise) with details like d-cache
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| H A D | perf-top.txt | 1 perf-top(1)
5 ----
6 perf-top - System profiling tool.
9 --------
11 'perf top' [-e <EVENT> | --event=EVENT] [<options>]
14 -----------
19 -------
20 -a::
21 --all-cpus::
22 System-wide collection. (default)
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| /linux/tools/perf/util/ |
| H A D | record.c | 1 // SPDX-License-Identifier: GPL-2.0
6 #include "parse-events.h"
11 #include <subcmd/parse-options.h>
16 #include "../perf-sys.h"
19 #include "mem-events.h"
22 * evsel__config_leader_sampling() uses special rules for leader sampling.
44 struct list_head *config_terms = &evsel->config_terms; in evsel__config_term_mask()
48 term_types |= 1 << term->typ in evsel__config_term_mask()
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| /linux/Documentation/driver-api/media/drivers/ |
| H A D | cx88-devel.rst | 1 .. SPDX-License-Identifier: GPL-2.0
9 -------------------------------------------
13 .. code-block:: none
16 Digit 8: 31-28
19 Digit 7: 27-24 (0xc = 12 = b1100 )
24 Digits 6,5: 23-16
25 25-16: COMB_RANGE = 0x1f [default] (9 bits -> max 512)
27 Digit 4: 15-12
33 Digit 3: 11-8
39 Digit 2: 7-4
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| /linux/sound/soc/codecs/ |
| H A D | ssm2602.h | 1 /* SPDX-License-Identifier: GPL-2.0-or-later */
81 #define APDIGI_DE_EMPHASIS 0x006 /* De-Emphasis Control …
105 /*Sampling Control (SSM2602_REG_SAMPLING_CTRL)*/
107 #define SRATE_BOS_RATE 0x002 /* Base Over-Sampling rate …
108 #define SRATE_SAMPLE_RATE 0x03C /* Clock setting condition (Sampling rate control)…
|
| /linux/sound/soc/tegra/ |
| H A D | Kconfig | 1 # SPDX-License-Identifier: GPL-2.0-only
3 tristate "SoC Audio for the Tegra System-on-Chip"
83 Config to enable the Inter-IC Sound (I2S) Controller which
84 implements full-duplex and bidirectional and single direction
85 point-to-point serial interfaces. It can interface with I2S
102 which converts the sampling frequency of the input signal from
103 one frequency to another. It can handle over a wide range of
114 converts the multi-bit Pulse Code Modulation (PCM) audio input to
115 oversampled 1-bit Pulse Density Modulation (PDM) output. From the
117 that up-samples the input to the desired sampling rate by
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| H A D | tegra20_spdif.h | 1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * tegra20_spdif.h - Definitions for Tegra20 SPDIF driver
6 * Copyright (C) 2011 - NVIDIA, Inc.
9 * Copyright (c) 2008-2009, NVIDIA Corporation
169 /* B-preamble detection status: 0=not detected, 1=B-preamble detected */
210 * bi-phase period.
215 /* Data strobe mode: 0=Auto-locked 1=Manual locked */
219 * Manual data strobe time within the bi-phase clock period (in terms of
220 * the number of over-sampling clocks).
226 * Manual SPDIFIN bi-phase clock period (in terms of the number of
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| /linux/net/ipv4/ |
| H A D | tcp_bbr.c | 21 * +---> STARTUP ----+
24 * | DRAIN ----+
27 * +---> PROBE_BW ----+
30 * | +----+ |
32 * +---- PROBE_RTT <--+
37 * A long-lived BBR flow spends the vast majority of its time remaining
42 * it briefly enters PROBE_RTT to cut inflight to a minimum value to re-probe
43 * the path's two-way propagation delay (min_rtt). When exiting PROBE_RTT, if
48 * "BBR: Congestion-Based Congestion Control",
50 * Van Jacobson. ACM Queue, Vol. 14 No. 5, September-October 2016.
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| /linux/kernel/ |
| H A D | watchdog_buddy.c | 1 // SPDX-License-Identifier: GPL-2.0
7 #include <linux/percpu-defs.h>
39 * the new CPU to delay the check for at least 3 sampling periods in watchdog_hardlockup_enable()
94 * watchdog_thresh * 2 / 5, so 3 samples gets us back to slightly over in watchdog_buddy_check_hardlockup()
95 * watchdog_thresh (over by 20%). in watchdog_buddy_check_hardlockup()
|
| /linux/include/uapi/linux/ |
| H A D | gen_stats.h | 1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
19 #define TCA_STATS_MAX (__TCA_STATS_MAX - 1)
22 * struct gnet_stats_basic - byte/packet throughput statistics
32 * struct gnet_stats_rate_est - rate estimator
42 * struct gnet_stats_rate_est64 - rate estimator
52 * struct gnet_stats_queue - queuing statistics
57 * @overlimits: number of enqueues over the limit
68 * struct gnet_estimator - rate estimator configuration
69 * @interval: sampling period
|
| /linux/drivers/cpufreq/ |
| H A D | cpufreq_governor.c | 1 // SPDX-License-Identifier: GPL-2.0-only
30 * sampling_rate_store - update sampling rate effective immediately if needed.
34 * original sampling_rate was 1 second and the requested new sampling rate is 10
37 * change the sampling rate too late; up to 1 second later. Thus, if we are
38 * reducing the sampling rate, we need to make the new value effective
41 * This must be called with dbs_data->mutex held, otherwise traversing
54 return -EINVAL; in sampling_rate_store()
56 dbs_data->sampling_rate = sampling_interval; in sampling_rate_store()
59 * We are operating under dbs_data->mutex and so the list and its in sampling_rate_store()
62 list_for_each_entry(policy_dbs, &attr_set->policy_list, list) { in sampling_rate_store()
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| /linux/kernel/trace/ |
| H A 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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| /linux/drivers/iio/pressure/ |
| H A D | zpa2326.c | 1 // SPDX-License-Identifier: GPL-2.0-only
18 * ZPA2326 hardware supports 2 sampling mode: one shot and continuous.
20 * A complete one shot sampling cycle gets device out of low power mode,
22 * back to low power mode. It is meant for on demand sampling with optimal power
23 * saving at the cost of lower sampling rate and higher software overhead.
34 * - get device out of low power mode,
35 * - setup hardware sampling period,
36 * - at end of period, upon data ready interrupt: pop pressure samples out of
38 * - when no longer needed, stop sampling process by putting device into
44 * Note that hardware sampling frequency is taken into account only when
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| /linux/Documentation/devicetree/bindings/sound/ |
| H A D | nvidia,tegra186-dspk.yaml | 1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/sound/nvidia,tegra186-dspk.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
11 Density Modulation (PDM) transmitter that up-samples the input to
12 the desired sampling rate by interpolation and then converts the
13 over sampled Pulse Code Modulation (PCM) input to the desired 1-bit
17 - Jon Hunter <jonathanh@nvidia.com>
18 - Sameer Pujar <spujar@nvidia.com>
21 - $ref: dai-common.yaml#
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|
| H A D | nvidia,tegra186-asrc.yaml | 1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/sound/nvidia,tegra186-asrc.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 Asynchronous Sample Rate Converter (ASRC) converts the sampling frequency
11 of the input signal from one frequency to another. It can handle over a
21 - Jon Hunter <jonathanh@nvidia.com>
22 - Mohan Kumar <mkumard@nvidia.com>
23 - Sameer Pujar <spujar@nvidia.com>
26 - $ref: dai-common.yaml#
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|
| /linux/Documentation/admin-guide/mm/damon/ |
| H A D | reclaim.rst | 1 .. SPDX-License-Identifier: GPL-2.0
4 DAMON-based Reclamation
7 DAMON-based Reclamation (DAMON_RECLAIM) is a static kernel module that aimed to
9 It doesn't aim to replace the LRU-list based page_granularity reclamation, but
15 On general memory over-committed systems, proactively reclaiming cold pages
20 Free Pages Reporting [3]_ based memory over-commit virtualization systems are
24 guests could be not so memory-frugal, mainly because some kernel subsystems and
25 user-space applications are designed to use as much memory as available. Then,
54 -------
60 no real monitoring and reclamation due to the watermarks-based activation
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| /linux/sound/firewire/motu/ |
| H A D | motu-protocol-v1.c | 1 // SPDX-License-Identifier: GPL-2.0-only
2 // motu-protocol-v1.c - a part of driver for MOTU FireWire series
4 // Copyright (c) 2021 Takashi Sakamoto <o-takashi@sakamocchi.jp>
12 // 0xffff0000: ISOC_COMM_CONTROL_MASK in motu-stream.c.
20 // 0x00000800: analog-1/2
21 // 0x00001a00: analog-3/4
22 // 0x00002c00: analog-5/6
23 // 0x00003e00: analog-7/8
24 // 0x00000000: analog-1
25 // 0x00000900: analog-2
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| /linux/Documentation/admin-guide/hw-vuln/ |
| H A D | special-register-buffer-data-sampling.rst | 1 .. SPDX-License-Identifier: GPL-2.0
3 SRBDS - Special Register Buffer Data Sampling
7 Documentation/admin-guide/hw-vuln/mds.rst techniques to
18 -------------------
19 Core models (desktop, mobile, Xeon-E3) that implement RDRAND and/or RDSEED may
48 ------------
53 CVE-2020-0543 SRBDS Special Register Buffer Data Sampling
57 ----------------
63 --------------------
69 During execution of the RDRAND, RDSEED, or EGETKEY instructions, off-core
[all …]
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| /linux/Documentation/mm/damon/ |
| H A D | design.rst | 1 .. SPDX-License-Identifier: GPL-2.0
13 The monitoring-related information including the monitoring request
14 specification and DAMON-based operation schemes are stored in a data structure
19 To know how user-space can do the configurations and start/stop DAMON, refer to
28 - :ref:`Operations Set <damon_operations_set>`: Implements fundamental
30 address-space and available set of software/hardware primitives,
31 - :ref:`Core <damon_core_logic>`: Implements core logics including monitoring
32 overhead/accuracy control and access-aware system operations on top of the
34 - :ref:`Modules <damon_modules>`: Implements kernel modules for various
49 monitoring are address-space dependent.
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| /linux/Documentation/admin-guide/ |
| H A D | cpu-load.rst | 10 Linux 2.6.18.3-exp (linmac) 02/20/2007
12 avg-cpu: %user %nice %system %iowait %steal %idle
17 Here the system thinks that over the default sampling period the
34 -------
40 |--------------------------------------|
55 /* gcc -o hog smallhog.c */
73 while (!stop && --niters);
91 for (i = 0; i < HIST; ++i) v[i] = ULONG_MAX - hog(ULONG_MAX);
94 n = tmp - (tmp / 3.0);
108 ----------
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| /linux/net/openvswitch/ |
| H A D | datapath.h | 1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Copyright (c) 2007-2014 Nicira, Inc.
21 #include "vport-internal_dev.h"
28 * struct dp_stats_percpu - per-cpu packet processing statistics for a given
54 * struct dp_nlsk_pids - array of netlink portids of for a datapath.
69 * struct datapath - datapath for flow-based packet switching
75 * @stats_percpu: Per-CPU datapath statistics.
111 * struct ovs_skb_cb - OVS data in skb CB
118 * @probability: The sampling probability that was applied to this skb; 0 means
119 * no sampling has occurred; U32_MAX means 100% probability.
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| /linux/Documentation/trace/coresight/ |
| H A D | coresight-cpu-debug.rst | 9 ------------
11 Coresight CPU debug module is defined in ARMv8-a architecture reference manual
13 debug module and it is mainly used for two modes: self-hosted debug and
16 explore debugging method which rely on self-hosted debug mode, this document
19 The debug module provides sample-based profiling extension, which can be used
21 every CPU has one dedicated debug module to be connected. Based on self-hosted
29 --------------
31 - During driver registration, it uses EDDEVID and EDDEVID1 - two device ID
32 registers to decide if sample-based profiling is implemented or not. On some
36 - At the time this documentation was written, the debug driver mainly relies on
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| /linux/Documentation/devicetree/bindings/display/bridge/ |
| H A D | lvds-codec.yaml | 1 # SPDX-License-Identifier: GPL-2.0
3 ---
4 $id: http://devicetree.org/schemas/display/bridge/lvds-codec.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
16 LVDS is a physical layer specification defined in ANSI/TIA/EIA-644-A. Multiple
17 incompatible data link layers have been used over time to transmit image data
21 [JEIDA] "Digital Interface Standards for Monitor", JEIDA-59-1999, February
28 Those devices have been marketed under the FPD-Link and FlatLink brand names
34 - items:
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| /linux/Documentation/userspace-api/media/v4l/ |
| H A D | vidioc-cropcap.rst | 1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
13 VIDIOC_CROPCAP - Information about the video cropping and scaling abilities
43 support cropping and/or scaling and/or have non-square pixels, and for
50 .. flat-table:: struct v4l2_cropcap
51 :header-rows: 0
52 :stub-columns: 0
55 * - __u32
56 - ``type``
57 - Type of the data stream, set by the application. Only these types
61 * - struct :ref:`v4l2_rect <v4l2-rect-crop>`
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| /linux/arch/arm/boot/dts/st/ |
| H A D | stm32mp157c-ed1.dts | 1 // SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
3 * Copyright (C) STMicroelectronics 2017 - All Rights Reserved
6 /dts-v1/;
10 #include "stm32mp15-pinctrl.dtsi"
11 #include "stm32mp15xxaa-pinctrl.dtsi"
12 #include <dt-bindings/gpio/gpio.h>
13 #include <dt-bindings/leds/common.h>
14 #include <dt-bindings/mfd/st,stpmic1.h>
18 compatible = "st,stm32mp157c-ed1", "st,stm32mp157";
25 stdout-path = "serial0:115200n8";
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|