Searched +full:high +full:- +full:performance (Results 1 – 25 of 751) sorted by relevance
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| /Linux-v5.15/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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| /Linux-v5.15/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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| /Linux-v5.15/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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| /Linux-v5.15/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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| /Linux-v5.15/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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| /Linux-v5.15/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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| /Linux-v5.15/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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| /Linux-v5.15/Documentation/ABI/testing/ |
| D | sysfs-platform_profile | 4 Description: This file contains a space-separated list of profiles supported for this device.
6 Drivers must use the following standard profile-names:
9 low-power Low power consumption
13 and performance
14 balanced-performance Balance between performance and low
16 towards performance
17 performance High performance operation
34 either directly by the embedded-controller or fully handled
|
| 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-v5.15/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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| /Linux-v5.15/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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| /Linux-v5.15/Documentation/userspace-api/ |
| D | sysfs-platform_profile.rst | 5 On modern systems the platform performance, temperature, fan and other
13 operation or towards performance.
19 NOT a goal of this API to allow monitoring the resulting performance
20 characteristics. Monitoring performance is best done with device/vendor
23 Specifically when selecting a high performance profile the actual achieved
24 performance may be limited by various factors such as: the heat generated
27 about any sub-optimal conditions which are impeding reaching the requested
28 performance level.
33 gets a consistent experience the sysfs-platform_profile ABI document defines
42 expected behaviour, to the sysfs-platform_profile ABI documentation.
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| /Linux-v5.15/fs/erofs/ |
| D | Kconfig | 1 # SPDX-License-Identifier: GPL-2.0-only
9 EROFS (Enhanced Read-Only File System) is a lightweight
10 read-only file system with modern designs (eg. page-sized
12 high-performance read-only requirements, e.g. Android OS
15 It also provides fixed-sized output compression support,
17 compression ratios, which is more useful to achieve high
18 performance for embedded devices with limited memory.
76 Enable fixed-sized output compression for EROFS.
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| /Linux-v5.15/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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| /Linux-v5.15/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
|
| /Linux-v5.15/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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| /Linux-v5.15/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…
38 variables initialized), but the performance impact depends
55 bool "zero-init structs marked for userspace (weak)"
59 Zero-initialize any structures on the stack containing
62 exposures, like CVE-2013-2141:
66 bool "zero-init structs passed by reference (strong)"
71 Zero-initialize any structures on the stack that may
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| /Linux-v5.15/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>;
|
| /Linux-v5.15/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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| 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-v5.15/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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| /Linux-v5.15/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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| /Linux-v5.15/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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| /Linux-v5.15/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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| /Linux-v5.15/Documentation/admin-guide/ |
| D | syscall-user-dispatch.rst | 1 .. SPDX-License-Identifier: GPL-2.0
8 ----------
11 calls of only a part of their process - the part that has the
12 incompatible code - while being able to execute native syscalls without
13 a high performance penalty on the native part of the process. Seccomp
21 multiple-personality application can then flip the switch without
34 There is a relatively high cost associated with handling signals on most
36 native Windows code are currently not known to be a performance problem,
40 non-native applications, it must function on syscalls whose invocation
49 ---------
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