Searched +full:high +full:- +full:performance (Results 1 – 25 of 741) sorted by relevance
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| /kernel/linux/linux-5.10/Documentation/admin-guide/pm/ |
| D | intel-speed-select.rst | 1 .. SPDX-License-Identifier: GPL-2.0
8 collection of features that give more granular control over CPU performance.
9 With Intel(R) SST, one server can be configured for power and performance for a
14 - https://www.intel.com/content/www/us/en/architecture-and-technology/speed-select-technology-artic…
15 - https://builders.intel.com/docs/networkbuilders/intel-speed-select-technology-base-frequency-enha…
19 dynamically without pre-configuring via BIOS setup options. This dynamic
25 how these commands change the power and performance profile of the system under
29 intel-speed-select configuration tool
32 Most Linux distribution packages may include the "intel-speed-select" tool. If not,
38 # cd tools/power/x86/intel-speed-select/
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| /kernel/linux/linux-5.10/tools/power/x86/x86_energy_perf_policy/ |
| 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 via x86 Model Specific Registers
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 "value: # | default | performance | balance-performance | balance-power | power"
21 displays and updates energy-performance policy settings specific to
23 updates, no matter if the Linux cpufreq sub-system is enabled or not.
27 such as how aggressively the hardware enters and exits CPU idle states (C-states)
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| /kernel/linux/linux-5.10/Documentation/usb/ |
| 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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| /kernel/linux/linux-5.10/tools/power/cpupower/bench/ |
| 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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| /kernel/linux/linux-5.10/Documentation/devicetree/bindings/sound/ |
| 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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| /kernel/linux/linux-5.10/drivers/scsi/ |
| 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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| /kernel/linux/linux-5.10/Documentation/virt/ |
| 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
17 functionalities in various areas. pv-ops allows for optimizations at run
18 time by enabling binary patching of the low-ops 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
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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| /kernel/linux/linux-5.10/Documentation/scsi/ |
| 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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| /kernel/linux/linux-5.10/fs/squashfs/ |
| 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
51 Doing so can significantly improve performance because
62 decompression. Each one exhibits various trade-offs between
63 decompression performance and CPU and memory usage.
70 Traditionally Squashfs has used single-threaded decompression.
78 poor performance on parallel I/O workloads when using multiple CPU
82 using this option may improve overall I/O performance.
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| /kernel/linux/linux-5.10/arch/nds32/ |
| D | Kconfig.cpu | 1 # SPDX-License-Identifier: GPL-2.0-only
27 enhance system performance by reducing the context switch
39 However, performance loss in float point calculations is
43 say N to prevent performance loss.
50 A set of Zero-Overhead Loop mechanism is provided to reduce the
51 instruction fetch and execution overhead of loop-control instructions.
102 prompt "Paging -- page size "
111 bool "Disable I-Cache"
117 bool "Disable D-Cache"
123 bool "Force write through D-cache"
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| /kernel/linux/linux-5.10/fs/erofs/ |
| D | Kconfig | 1 # SPDX-License-Identifier: GPL-2.0-only
8 EROFS (Enhanced Read-Only File System) is a lightweight
9 read-only file system with modern designs (eg. page-sized
11 high-performance read-only requirements, e.g. Android OS
14 It also provides fixed-sized output compression support,
16 compression ratios, which is more useful to achieve high
17 performance for embedded devices with limited memory.
75 Enable fixed-sized output compression for EROFS.
89 into 8k-unit, hard limit should not be configured
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| /kernel/linux/linux-5.10/Documentation/admin-guide/cifs/ |
| 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
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| /kernel/linux/linux-5.10/security/ |
| D | Kconfig.hardening | 1 # SPDX-License-Identifier: GPL-2.0-only
12 flaws, this plugin is available to identify and zero-initialize
23 def_bool $(cc-option,-ftrivial-auto-var-init=pattern)
26 …def_bool $(cc-option,-ftrivial-auto-var-init=zero -enable-trivial-auto-var-init-zero-knowing-it-wi…
37 variables initialized), but the performance impact depends
54 bool "zero-init structs marked for userspace (weak)"
58 Zero-initialize any structures on the stack containing
61 exposures, like CVE-2013-2141:
65 bool "zero-init structs passed by reference (strong)"
70 Zero-initialize any structures on the stack that may
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| /kernel/linux/linux-5.10/Documentation/scheduler/ |
| D | sched-energy.rst | 6 ---------------
25 please refer to its documentation (see Documentation/power/energy-model.rst).
29 -----------------------------
32 - energy = [joule] (resource like a battery on powered devices)
33 - power = energy/time = [joule/second] = [watt]
38 performance [inst/s]
39 --------------------
45 -----------
48 while still getting 'good' performance. It is essentially an alternative
49 optimization objective to the current performance-only objective for the
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| /kernel/linux/linux-5.10/Documentation/devicetree/bindings/nds32/ |
| D | atl2c.txt | 3 The level-2 cache controller plays an important role in reducing memory latency
4 for high performance systems, such as thoese designs with AndesCore processors.
5 Level-2 cache controller in general enhances overall system performance
13 - compatible:
17 - reg : Physical base address and size of cache controller's memory mapped
18 - cache-unified : Specifies the cache is a unified cache.
19 - cache-level : Should be set to 2 for a level 2 cache.
23 cache-controller@e0500000 {
26 cache-unified;
27 cache-level = <2>;
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| /kernel/linux/linux-5.10/Documentation/hwmon/ |
| D | bt1-pvt.rst | 1 .. SPDX-License-Identifier: GPL-2.0-only
3 Kernel driver bt1-pvt
8 * Baikal-T1 PVT sensor (in SoC)
10 Prefix: 'bt1-pvt'
12 Addresses scanned: -
21 -----------
24 embedded into Baikal-T1 process, voltage and temperature sensors. PVT IP-core
27 transistors performance. The driver can optionally provide the hwmon alarms
29 compile-time configurable due to the hardware interface implementation
37 the system performance. So in case if alarms are unnecessary in your system
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| /kernel/linux/linux-5.10/Documentation/trace/ |
| 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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| /kernel/linux/linux-5.10/Documentation/timers/ |
| D | hrtimers.rst | 2 hrtimers - subsystem for high-resolution kernel timers
5 This patch introduces a new subsystem for high-resolution kernel timers.
9 back and forth trying to integrate high-resolution and high-precision
11 such high-resolution timer implementations in practice, we came to the
18 - the forced handling of low-resolution and high-resolution timers in
21 32-bitness assumptions, and has been honed and micro-optimized for a
23 for many years - and thus even small extensions to it easily break
26 current usage - but it is simply not suitable to be extended for
27 high-res timers.
29 - the unpredictable [O(N)] overhead of cascading leads to delays which
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| /kernel/linux/linux-5.10/drivers/soc/fsl/qbman/ |
| 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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| /kernel/linux/linux-5.10/Documentation/admin-guide/sysctl/ |
| D | vm.rst | 13 ------------------------------------------------------------------------------
27 - admin_reserve_kbytes
28 - compact_memory
29 - compaction_proactiveness
30 - compact_unevictable_allowed
31 - dirty_background_bytes
32 - dirty_background_ratio
33 - dirty_bytes
34 - dirty_expire_centisecs
35 - dirty_ratio
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| /kernel/linux/linux-5.10/include/linux/ |
| D | energy_model.h | 1 /* SPDX-License-Identifier: GPL-2.0 */
14 * em_perf_state - Performance state of a performance domain
16 * @power: The power consumed at this level, in milli-watts (by 1 CPU or
29 * em_perf_domain - Performance domain
30 * @table: List of performance states, in ascending order
31 * @nr_perf_states: Number of performance states
33 * for performance reasons to avoid potential cache
37 * In case of CPU device, a "performance domain" represents a group of CPUs
38 * whose performance is scaled together. All CPUs of a performance domain
39 * must have the same micro-architecture. Performance domains often have
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| /kernel/linux/linux-5.10/Documentation/ABI/testing/ |
| 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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| D | sysfs-platform-eeepc-laptop | 8 - 1 = LCD
9 - 2 = CRT
10 - 3 = LCD+CRT
36 * 0 -> Super Performance Mode
37 * 1 -> High Performance Mode
38 * 2 -> Power Saving Mode
46 | `---- Current mode
47 `------------ Availables modes
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| D | sysfs-platform-asus-wmi | 6 Change CPU clock configuration (write-only).
9 * 0 -> Super Performance Mode
10 * 1 -> High Performance Mode
11 * 2 -> Power Saving Mode
47 * 0 - normal,
48 * 1 - overboost,
49 * 2 - silent
57 * 0 - default,
58 * 1 - overboost,
59 * 2 - silent
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| /kernel/linux/linux-5.10/Documentation/driver-api/gpio/ |
| D | consumer.rst | 6 it describes the new descriptor-based interface. For a description of the
7 deprecated integer-based GPIO interface please refer to gpio-legacy.txt.
23 - Simple compile coverage with e.g. COMPILE_TEST - it does not matter that
27 - Truly optional GPIOLIB support - where the driver does not really make use
28 of the GPIOs on certain compile-time configurations for certain systems, but
29 will use it under other compile-time configurations. In this case the
33 All the functions that work with the descriptor-based GPIO interface are
43 With the descriptor-based interface, GPIOs are identified with an opaque,
44 non-forgeable handler that must be obtained through a call to one of the
60 see Documentation/driver-api/gpio/board.rst
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