Searched full:compression (Results 1 – 25 of 113) sorted by relevance
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| /Documentation/admin-guide/blockdev/ |
| D | zram.rst | 10 in memory itself. These disks allow very fast I/O and compression provides
76 2) Set max number of compression streams
80 allocate multiple compression streams - one per online CPU - thus
81 allowing several concurrent compression operations. The number of
82 allocated compression streams goes down when some of the CPUs
83 become offline. There is no single-compression-stream mode anymore,
90 3) Select compression algorithm
94 currently selected (shown in square brackets) compression algorithms,
95 or change the selected compression algorithm (once the device is initialised
96 there is no way to change compression algorithm).
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| /Documentation/userspace-api/media/drivers/ |
| D | aspeed-video.rst | 9 video compressions with a wide range of video quality and compression ratio
14 * JPEG JFIF standard mode: for single frame and management compression
15 * ASPEED proprietary mode: for multi-frame and differential compression.
16 Support 2-pass (high quality) video compression scheme (Patent pending by
17 ASPEED). Provide visually lossless video compression quality or to reduce
48 that can be used to decide compression quality if High quality mode enabled
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| /Documentation/networking/ |
| D | fib_trie.rst | 16 indexed through a subset of the key. See Level Compression.
22 child array - the "child index". See Level Compression.
26 the child array. See Path Compression.
28 Path Compression / skipped bits
34 deviations. These "skipped bits" constitute Path Compression.
39 Level Compression / child arrays
73 level compression algorithm on part of the trie.
76 Looks up a key, deletes it and runs the level compression algorithm.
82 to implement level compression.
87 level compression. This part follows the original paper pretty closely
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| D | ipsec.rst | 29 Small IP datagrams are likely to expand as a result of compression.
30 Therefore, a numeric threshold should be applied before compression,
32 original form without attempting compression. The numeric threshold
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| D | ppp_generic.rst | 20 * packet compression and decompression
21 * TCP/IP header compression and decompression
164 then subjected to TCP/IP header compression and packet compression
165 (Deflate or BSD-Compress compression), as appropriate. After this
275 unit) will be subject to bundle-level compression and to fragmentation
347 SC_COMP_TCP enable transmit TCP header compression
348 SC_NO_TCP_CCID disable connection-id compression for
349 TCP header compression
351 SC_CCP_OPEN Compression Control Protocol (CCP) is
379 * PPPIOCSCOMPRESS sets the parameters for packet compression or
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| /Documentation/staging/ |
| D | xz.rst | 4 XZ data compression in Linux
10 XZ is a general purpose data compression format with high compression
19 For userspace, `XZ Utils`_ provide a zlib-like compression library
50 Notes on compression options
81 For the best compression, the dictionary should be at least
85 The compression presets in XZ Utils may not be optimal when creating
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| /Documentation/mm/ |
| D | z3fold.rst | 7 It is a zbud derivative which allows for higher compression
20 compression ratio goes to around 2.7x while zbud's one is around 1.7x.
26 Keeping effective compression ratio close to zsmalloc's, z3fold doesn't
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| /Documentation/admin-guide/media/ |
| D | philips.rst | 95 compression (only useful with the plugin)
96 With this option you can control the compression factor that the camera
102 compression.
103 1 = low compression.
104 2 = medium compression.
105 3 = high compression.
107 High compression takes less bandwidth of course, but it could also
108 introduce some unwanted artefacts. The default is 2, medium compression.
110 compression.
112 The compression parameter does not apply to the 645 and 646 cameras
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| /Documentation/ABI/testing/ |
| D | sysfs-block-zram | 30 number of backend's zcomp_strm compression streams (number of
38 available and selected compression algorithms, change
39 compression algorithm selection.
146 or show secondary compression algorithms.
152 The recompress file is write-only and triggers re-compression
153 with secondary compression algorithms.
160 compression algorithm parameters.
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| D | sysfs-driver-qat | 31 * dc: the device is configured for running compression services
33 hash then compression. If this is not required chose dc
39 crypto services and compression services
42 services and compression services
50 run data compression::
117 * dc: the ring pair is configured for running compression services
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| /Documentation/userspace-api/media/v4l/ |
| D | ext-ctrls-fm-tx.rst | 11 parameters for audio compression, pilot tone generation, audio deviation
114 Enables or disables the audio compression feature. This feature
120 Sets the gain for audio compression feature. It is a dB value. The
124 Sets the threshold level for audio compression freature. It is a dB
128 Sets the attack time for audio compression feature. It is a useconds
132 Sets the release time for audio compression feature. It is a
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| D | pixfmt-reserved.rst | 237 MT8195 and more. The compression is lossless. This format have
247 It is an opaque intermediate format. The used compression is lossless
257 It is an opaque intermediate format. The used compression is lossless
267 On each frame compression, I will compare the new frame with previous
273 – ASPEED mode compression of SDK_User_Guide which available on
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| /Documentation/gpu/amdgpu/display/ |
| D | dc-glossary.rst | 65 Delta Colour Compression
95 Display Stream Compression (Reduce the amount of bits to represent pixel
129 Frame Buffer Compression
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| /Documentation/devicetree/bindings/media/ |
| D | nuvoton,npcm-ece.yaml | 7 title: Nuvoton NPCM Encoding Compression Engine
14 Video Encoding Compression Engine (ECE) present on Nuvoton NPCM SoCs.
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| D | renesas,fcp.yaml | 7 title: Renesas R-Car Frame Compression Processor (FCP)
14 R-Car Gen3 and RZ/G2 SoCs. It provides data compression and decompression,
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| /Documentation/admin-guide/device-mapper/ |
| D | vdo.rst | 7 block-level deduplication, compression, and thin provisioning. As a device
42 deduplication and compression is not cancelled out by the metadata
132 as hashing and compression. The default is 1.
169 compression:
170 Whether compression is enabled. The default is 'off'; the
179 <maxDiscard>, <compression>, and <deduplication>.
283 <compression state> <physical blocks used> <total physical blocks>
305 compression state:
306 The current state of compression in the vdo volume; values
406 CPU threads are used for hashing and for compression; in workloads with
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| /Documentation/driver-api/crypto/iaa/ |
| D | iaa-crypto.rst | 4 IAA Compression Accelerator Crypto Driver
9 The IAA crypto driver supports compression/decompression compatible
10 with the DEFLATE compression standard described in RFC 1951, which is
11 the compression/decompression algorithm exported by this module.
18 higher-level compression devices such as zswap.
21 one of the supported IAA compression algorithms in whatever facility
22 allows compression algorithms to be selected.
25 represented by selecting the 'deflate-iaa' crypto compression
30 This will tell zswap to use the IAA 'fixed' compression mode for all
33 Currently, there is only one compression modes available, 'fixed'
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| D | index.rst | 7 IAA provides hardware compression and decompression via the crypto
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| /Documentation/filesystems/ |
| D | f2fs.rst | 301 compression on those corresponding files, e.g. if all files
302 with '.ext' has high compression rate, we can set the '.ext'
303 on compression extension list and enable compression on
305 For other files, we can still enable compression via ioctl.
307 can be set to enable compression for all files.
309 compression on those corresponding files, just contrary to compression extension.
318 See more in compression sections.
321 compress_mode=%s Control file compression mode. This supports "fs" and "user"
322 modes. In "fs" mode (default), f2fs does automatic compression
323 on the compression enabled files. In "user" mode, f2fs disables
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| D | squashfs.rst | 9 It uses zlib, lz4, lzo, or xz compression to compress files, inodes and
36 Metadata compression yes no
136 | compression |
165 3.1 Compression options
168 Compressors can optionally support compression specific options (e.g.
169 dictionary size). If non-default compression options have been used, then
186 To maximise compression there are different inodes for each file type
190 To further maximise compression, two types of regular file inode and
316 are packed together into blocks (to gain greater compression) the read of a
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| D | erofs.rst | 29 by using compact layout, transparent file compression and direct access,
65 - Support transparent data compression as an option:
213 1 fixed-sized output data compression (with non-compacted indexes);
215 3 fixed-sized output data compression (with compacted indexes, v5.3+);
310 Data compression
312 EROFS implements fixed-sized output compression which generates fixed-sized
314 fixed-sized input solutions. Relatively higher compression ratios can be gotten
315 by using fixed-sized output compression since nowadays popular data compression
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| /Documentation/arch/powerpc/ |
| D | vas-api.rst | 15 such as 842 compression, GZIP compression and encryption. On power9,
16 userspace applications will have access to only GZIP Compression engine
17 which supports ZLIB and GZIP compression algorithms in the hardware.
30 kernel to setup channel / window which can be used to send compression
94 instead of libz and use NX GZIP compression without any modification.
293 //Format CRB request with compression or
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| /Documentation/devicetree/bindings/display/panel/ |
| D | novatek,nt35950.yaml | 15 video mode with VESA Frame Buffer Compression or Display Stream Compression
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| /Documentation/crypto/ |
| D | intro.rst | 20 cryptographic operations, the kernel crypto API also knows compression
34 transformations (such as CRC or even compression algorithms) that can
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| /Documentation/gpu/ |
| D | afbc.rst | 4 Arm Framebuffer Compression (AFBC)
7 AFBC is a proprietary lossless image compression protocol and format.
29 maximum compression efficiency), the component order must be:
71 bad for compression efficiency, and so it's recommended to avoid
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