| /linux/tools/power/x86/x86_energy_perf_policy/ |
| H A D | x86_energy_perf_policy.8 | 1 .\" This page Copyright (C) 2010 - 2015 Len Brown <len.brown@intel.com>
5 x86_energy_perf_policy \- Manage Energy vs. Performance Policy
10 .RB "scope: \-\-cpu\ cpu-list | \-\-pkg\ pkg-list"
12 .RB "cpu-list, pkg-list: # | #,# | #-# | all"
14 .RB "field: \-\-all | \-\-epb | \-\-hwp-epp | \-\-hwp-min | \-\-hwp-max | \-\-hwp-desired"
16 .RB "other: (\-\-force | \-\-hwp-enable | \-\-turbo-enable) value)"
18 .RB "soc-slider: --soc-slider-balance # | --soc-slider-offset # | --platform-profile <name>"
20 .RB "value: # | default | performance | balance-performance | balance-power | power"
23 displays and updates energy-performance policy settings specific to
27 While \fBx86_energy_perf_policy\fP can manage energy-performance policy
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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 ------------
17 performance, SoCs have internal algorithms for scaling uncore frequency. These
20 It is possible that users have different expectations of uncore performance and
22 the scaling min/max frequencies via cpufreq sysfs to improve CPU performance.
25 different core and uncore performance at distinct phases and they may want to
27 improve overall performance.
30 ---------------
45 This is a read-only attribute. If users adjust max_freq_khz,
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| /linux/drivers/platform/mellanox/ |
| H A D | Kconfig | 1 # SPDX-License-Identifier: GPL-2.0
37 providing a high performance switching solution for Enterprise Data
38 Centers (EDC) for building Ethernet based clusters, High-Performance
49 This driver handles hot-plug events for the power suppliers, power
69 This driver provides support for the Mellanox MSN4800-XX line cards,
71 providing a high performance switching solution for Enterprise Data
72 Centers (EDC) for building Ethernet based clusters, High-Performance
99 tristate "Mellanox BlueField Performance Monitoring Counters driver"
105 to performance monitoring counters within various blocks in the
118 serial port (RS-232 interface), an OOB port (1G/100M MDI interface)
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| /linux/Documentation/usb/ |
| H A D | ehci.rst | 5 27-Dec-2002
7 The EHCI driver is used to talk to high speed USB 2.0 devices using
8 USB 2.0-capable host controller hardware. The USB 2.0 standard is
11 - "High Speed" 480 Mbit/sec (60 MByte/sec)
12 - "Full Speed" 12 Mbit/sec (1.5 MByte/sec)
13 - "Low Speed" 1.5 Mbit/sec
15 USB 1.1 only addressed full speed and low speed. High speed devices
24 high speed "split transactions" that don't waste transfer bandwidth.
31 While usb-storage devices have been available since mid-2001 (working
33 been available since late 2001, and other kinds of high speed devices
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| /linux/tools/power/cpupower/bench/ |
| H A D | README-BENCH | 1 This is cpufreq-bench, a microbenchmark for the cpufreq framework.
7 - Identify worst case performance loss when doing dynamic frequency
9 - Identify average reaction time of a governor to CPU load changes
10 - (Stress) Testing whether a cpufreq low level driver or governor works
12 - Identify cpufreq related performance regressions between kernels
13 - Possibly Real time priority testing? -> what happens if there are
15 - ...
18 - Power saving related regressions (In fact as better the performance
21 - Real world (workloads)
27 cpufreq-bench helps to test the condition of a given cpufreq governor.
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| /linux/drivers/scsi/ |
| H A D | sense_codes.h | 1 /* SPDX-License-Identifier: GPL-2.0 */
4 * http://www.t10.org/lists/asc-num.txt [most recent: 20200817]
9 SENSE_CODE(0x0002, "End-of-partition/medium detected")
11 SENSE_CODE(0x0004, "Beginning-of-partition/medium detected")
12 SENSE_CODE(0x0005, "End-of-data detected")
51 SENSE_CODE(0x0409, "Logical unit not ready, self-test in progress")
87 SENSE_CODE(0x0801, "Logical unit communication time-out")
89 SENSE_CODE(0x0803, "Logical unit communication CRC error (Ultra-DMA/32)")
102 SENSE_CODE(0x0B01, "Warning - specified temperature exceeded")
103 SENSE_CODE(0x0B02, "Warning - enclosure degraded")
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| /linux/Documentation/devicetree/bindings/sound/ |
| H A D | cirrus,cs4234.yaml | 1 # SPDX-License-Identifier: (GPL-2.0+ OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - patches@opensource.cirrus.com
14 high performance analog to digital conversion, 4 channels of high
15 performance digital to analog conversion for audio, and 1 channel of
19 standard audio grade DAC, with performance specifications identical
22 provide lead time for the external switch-mode power supply, and a
24 low-latency path to the outputs.
29 - cirrus,cs4234
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| /linux/Documentation/scsi/ |
| H A D | FlashPoint.rst | 1 .. SPDX-License-Identifier: GPL-2.0
17 FREMONT, CA, -- October 8, 1996 -- Mylex Corporation has expanded Linux
33 Linux is a freely-distributed implementation of UNIX for Intel x86, Sun
53 produces high performance disk array (RAID) controllers, and complementary
58 enhance CPU utilization, optimize I/O performance, and ensure data security
71 510/796-6100
78 BusLogic FlashPoint LT/BT-948 Upgrade Program
82 BusLogic FlashPoint LW/BT-958 Upgrade Program
89 particularly well suited for a high performance multitasking operating
91 vendors as the latest thing, and has been sold even on many of their high
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| /linux/Documentation/ABI/testing/ |
| H A D | sysfs-class-platform-profile | 1 What: /sys/class/platform-profile/platform-profile-X/name
8 What: /sys/class/platform-profile/platform-profile-X/choices
11 Description: This file contains a space-separated list of profiles supported
14 Drivers must use the following standard profile-names:
17 low-power Low power consumption
21 and performance
22 balanced-performance Balance between performance and low
24 towards performance
25 performance High performance operation
26 max-power Higher performance operation that may exceed
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| H A D | sysfs-platform-hidma-mgmt | 1 What: /sys/devices/platform/hidma-mgmt*/chanops/chan*/priority
8 low priority (0) or high priority (1) channel.
10 What: /sys/devices/platform/hidma-mgmt*/chanops/chan*/weight
19 What: /sys/devices/platform/hidma-mgmt*/chreset_timeout_cycles
31 What: /sys/devices/platform/hidma-mgmt*/dma_channels
40 What: /sys/devices/platform/hidma-mgmt*/hw_version_major
48 What: /sys/devices/platform/hidma-mgmt*/hw_version_minor
56 What: /sys/devices/platform/hidma-mgmt*/max_rd_xactions
64 Choosing a higher number gives better performance but
65 can also cause performance reduction to other peripherals
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| /linux/Documentation/virt/ |
| H A D | paravirt_ops.rst | 1 .. SPDX-License-Identifier: GPL-2.0
13 including native machine -- without any hypervisors.
16 corresponding to low-level critical instructions and high-level
18 time by enabling binary patching of the low-level critical operations
23 - simple indirect call
24 These operations correspond to high-level functionality where it is
27 - indirect call which allows optimization with binary patch
28 Usually these operations correspond to low-level critical instructions. They
29 are called frequently and are performance critical. The overhead is
32 - a set of macros for hand written assembly code
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| /linux/fs/squashfs/ |
| H A D | Kconfig | 1 # SPDX-License-Identifier: GPL-2.0-only
3 tristate "SquashFS 4.0 - Squashed file system support"
7 Read-Only File System). Squashfs is a highly compressed read-only
16 Squashfs is intended for general read-only filesystem use, for
19 and tools are available from github.com/plougher/squashfs-tools.
51 Doing so can significantly improve performance because
88 decompression. Each one exhibits various trade-offs between
89 decompression performance and CPU and memory usage.
97 Traditionally Squashfs has used single-threaded decompression.
106 poor performance on parallel I/O workloads when using multiple CPU
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| /linux/Documentation/devicetree/bindings/regulator/ |
| H A D | richtek,rt5759-regulator.yaml | 1 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
3 ---
4 $id: http://devicetree.org/schemas/regulator/richtek,rt5759-regulator.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Richtek RT5759 High Performance DCDC Converter
10 - ChiYuan Huang <cy_huang@richtek.com>
13 The RT5759 is a high-performance, synchronous step-down DC-DC converter that
15 voltage can be programmable with I2C controlled 7-Bit VID.
18 https://www.richtek.com/assets/product_file/RT5759/DS5759-00.pdf
23 - richtek,rt5759
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| H A D | renesas,raa215300.yaml | 1 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Biju Das <biju.das.jz@bp.renesas.com>
13 The RAA215300 is a high-performance, low-cost 9-channel PMIC designed for
14 32-bit and 64-bit MCU and MPU applications. It supports DDR3, DDR3L, DDR4,
16 built-in Real-Time Clock (RTC), 32kHz crystal oscillator, and coin cell
18 ideal for System-On-Module (SOM) applications. A spread spectrum feature
19 provides an ease-of-use solution for noise-sensitive audio or RF applications.
25 …-power-management/multi-channel-power-management-ics-pmics/ssdsoc-power-management-ics-pmic-and-pm…
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| H A D | microchip,mcp16502.yaml | 1 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: MCP16502 - High-Performance PMIC
10 - Andrei Simion <andrei.simion@microchip.com>
16 of High-Performance mode (HPM).
22 lpm-gpios:
25 Note that this GPIO must remain high during
26 suspend-to-ram, keeping the PMIC into HIBERNATE mode.
31 lvin-supply:
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| /linux/Documentation/admin-guide/cifs/ |
| H A D | introduction.rst | 26 security features, excellent parallelized high performance i/o, better
27 POSIX compliance, secure per-user session establishment, encryption,
28 high performance safe distributed caching (leases/oplocks), optional packet
39 https://git.samba.org/?p=cifs-utils.git
43 git://git.samba.org/cifs-utils.git
|
| /linux/Documentation/admin-guide/sysctl/ |
| H A D | vm.rst | 13 ------------------------------------------------------------------------------
27 - admin_reserve_kbytes
28 - compact_memory
29 - compaction_proactiveness
30 - compact_unevictable_allowed
31 - defrag_mode
32 - dirty_background_bytes
33 - dirty_background_ratio
34 - dirty_bytes
35 - dirty_expire_centisecs
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| /linux/Documentation/trace/ |
| H A D | events-kmem.rst | 8 - Slab allocation of small objects of unknown type (kmalloc)
9 - Slab allocation of small objects of known type
10 - Page allocation
11 - Per-CPU Allocator Activity
12 - External Fragmentation
40 These events are similar in usage to the kmalloc-related events except that
56 the per-CPU allocator (high performance) or the buddy allocator.
59 mm_page_alloc_zone_locked event is triggered. This event is important as high
60 amounts of activity imply high activity on the zone->lock. Taking this lock
61 impairs performance by disabling interrupts, dirtying cache lines between
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| /linux/Documentation/hwmon/ |
| H A D | pm6764tr.rst | 1 .. SPDX-License-Identifier: GPL-2.0-only
12 Addresses scanned: -
20 ------------
22 This driver supports the STMicroelectronics PM6764TR chip. The PM6764TR is a high
23 performance digital controller designed to power Intel's VR12.5 processors and memories.
26 functions to provide maximum flexibility and performance. The NVM is embedded to store
27 custom configurations. The PM6764TR device features up to 4-phase programmable operation.
|
| /linux/arch/arm/mm/ |
| H A D | Kconfig | 1 # SPDX-License-Identifier: GPL-2.0
17 A 32-bit RISC microprocessor based on the ARM7 processor core
36 A 32-bit RISC processor with 8kByte Cache, Write Buffer and
53 A 32-bit RISC processor with 8KB cache or 4KB variants,
69 A 32-bit RISC microprocessor based on the ARM9 processor core
182 ARM940T is a member of the ARM9TDMI family of general-
184 instruction and 4KB data cases, each with a 4-word line
190 # ARM946E-S
201 ARM946E-S is a member of the ARM9E-S family of high-
202 performance, 32-bit system-on-chip processor solutions.
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| /linux/Documentation/userspace-api/media/drivers/ |
| H A D | aspeed-video.rst | 1 .. SPDX-License-Identifier: GPL-2.0
8 ASPEED Video Engine found on AST2400/2500/2600 SoC supports high performance
15 * ASPEED proprietary mode: for multi-frame and differential compression.
16 Support 2-pass (high quality) video compression scheme (Patent pending by
26 `github <https://github.com/AspeedTech-BMC/openbmc/releases/>`__.
28 The ASPEED video driver implements the following driver-specific control:
31 ---------------------------
32 Enable/Disable ASPEED's High quality mode. This is a private control
33 that can be used to enable high quality for aspeed proprietary mode.
35 .. flat-table::
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| /linux/Documentation/driver-api/gpio/ |
| H A D | consumer.rst | 21 - Simple compile coverage with e.g. COMPILE_TEST - it does not matter that
25 - Truly optional GPIOLIB support - where the driver does not really make use
26 of the GPIOs on certain compile-time configurations for certain systems, but
27 will use it under other compile-time configurations. In this case the
35 All the functions that work with the descriptor-based GPIO interface are
45 With the descriptor-based interface, GPIOs are identified with an opaque,
46 non-forgeable handler that must be obtained through a call to one of the
62 see Documentation/driver-api/gpio/board.rst
78 whether the line is configured active high or active low (see
87 with IS_ERR() (they will never return a NULL pointer). -ENOENT will be returned
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| /linux/drivers/soc/fsl/qbman/ |
| H A D | Kconfig | 1 # SPDX-License-Identifier: GPL-2.0-only
26 Compiles in additional checks, to sanity-check the drivers and
27 any use of the exported API. Not recommended for performance.
30 tristate "BMan self-tests"
32 Compile the BMan self-test code. These tests will
37 bool "High-level API self-test"
41 This requires the presence of cpu-affine portals, and performs
42 high-level API testing with them (whichever portal(s) are affine
46 tristate "QMan self-tests"
48 Compile self-test code for QMan.
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| /linux/arch/mips/include/asm/sn/sn0/ |
| H A D | hubmd.h | 8 * Copyright (C) 1992 - 1997, 1999 Silicon Graphics, Inc.
38 #define MD_FANDOP_CAC_STAT 0x200028 /* Fetch-and-op cache status */
57 #define MD_PERF_CNT0 0x210010 /* Performance counter 0 */
58 #define MD_PERF_CNT1 0x210018 /* Performance counter 1 */
59 #define MD_PERF_CNT2 0x210020 /* Performance counter 2 */
60 #define MD_PERF_CNT3 0x210028 /* Performance counter 3 */
61 #define MD_PERF_CNT4 0x210030 /* Performance counter 4 */
62 #define MD_PERF_CNT5 0x210038 /* Performance counter 5 */
74 #define MD_LED0 0x220050 /* Eight-bit LED for CPU A */
75 #define MD_LED1 0x220058 /* Eight-bit LED for CPU B */
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| /linux/fs/ext4/ |
| H A D | Kconfig | 1 # SPDX-License-Identifier: GPL-2.0-only
14 the on-disk format of ext4 is not forwards compatible with
15 ext3; it is based on extent maps and it supports 48-bit
17 allocation, persistent preallocation, high resolution time stamps,
18 and a number of other features to improve performance and speed
23 are some performance gains from the delayed allocation and inode
24 table readahead, the best performance gains require enabling ext4
72 Enables run-time debugging support for the ext4 filesystem.
90 to the KUnit documentation in Documentation/dev-tools/kunit/.
|