| /qemu/docs/ |
| A D | multi-thread-compression.txt | 1 Use multiple thread (de)compression in live migration
32 thread compression can be used to accelerate the compression process.
40 compression ratio. High compression ratio will take more time, level 0
41 stands for no compression, level 1 stands for the best compression
76 | | compression level: 1
96 | | compression level: 1
112 to support the multiple thread compression migration:
116 2. Activate compression on the source:
119 3. Set the compression thread count on source:
122 4. Set the compression level on the source:
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| /qemu/docs/devel/migration/ |
| A D | qpl-compression.rst | 5 provide compression and decompression features and it is based on deflate
6 compression algorithm (RFC 1951).
8 The ``QPL`` compression relies on Intel In-Memory Analytics Accelerator(``IAA``)
163 The multifd migration with ``QPL`` compression method will use all work
204 4 - Enable ``QPL`` compression during migration
206 Set ``migrate_set_parameter multifd-compression qpl`` when migrating, the
207 ``QPL`` compression does not support configuring the compression level, it
208 only supports one compression level.
213 Although both ``QPL`` and ``ZLIB`` are based on the deflate compression
222 compression, current ``ZLIB`` implementation uses ``Z_SYNC_FLUSH``, so each
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| A D | features.rst | 15 qpl-compression
16 uadk-compression
17 qatzip-compression
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| A D | uadk-compression.rst | 6 hardware acceleration of cryptographic and compression algorithms.
13 UACCE. Through the UADK framework, users can run cryptographic and compression
132 * Enable ``UADK`` compression during migration
134 Set ``migrate_set_parameter multifd-compression uadk``
142 Though both UADK and ZLIB are based on the deflate compression algorithm, UADK
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| A D | qatzip-compression.rst | 5 users save a lot of host CPU resources by accelerating compression and
37 Technology to provide extended accelerated compression and decompression
115 3 - Set ``migrate_set_parameter multifd-compression qatzip``
159 lot of host CPU resources for compression.
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| /qemu/ui/ |
| A D | vnc-enc-zlib.c | 79 err = deflateInit2(zstream, vs->tight->compression, Z_DEFLATED, in vnc_zlib_stop()
88 vs->zlib.level = vs->tight->compression; in vnc_zlib_stop()
92 if (vs->tight->compression != vs->zlib.level) { in vnc_zlib_stop()
93 if (deflateParams(zstream, vs->tight->compression, in vnc_zlib_stop()
97 vs->zlib.level = vs->tight->compression; in vnc_zlib_stop()
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| A D | vnc-enc-tight.c | 299 int compression = vs->tight->compression; in tight_detect_smooth_image() local
317 if (w * h < tight_conf[compression].gradient_min_rect_size) { in tight_detect_smooth_image()
338 return (errors < tight_conf[compression].gradient_threshold); in tight_detect_smooth_image()
967 int level = tight_conf[vs->tight->compression].mono_zlib_level; in send_mono_rect()
1044 int level = tight_conf[vs->tight->compression].gradient_zlib_level; in send_gradient_rect()
1081 int level = tight_conf[vs->tight->compression].idx_zlib_level; in send_palette_rect()
1299 int level = tight_png_conf[vs->tight->compression].png_zlib_level; in send_png_rect()
1300 int filters = tight_png_conf[vs->tight->compression].png_filters; in send_png_rect()
1544 max_size = tight_conf[vs->tight->compression].max_rect_size; in send_rect_simple()
1545 max_width = tight_conf[vs->tight->compression].max_rect_width; in send_rect_simple()
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| A D | spice-core.c | 666 spice_image_compression_t compression; in qemu_spice_init() local
775 compression = SPICE_IMAGE_COMPRESS_AUTO_GLZ; in qemu_spice_init()
778 compression = parse_compression(str); in qemu_spice_init()
780 spice_server_set_image_compression(spice_server, compression); in qemu_spice_init()
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| /qemu/tests/qemu-iotests/ |
| A D | 287 | 64 _qcow2_dump_header --no-filter-compression | grep incompatible_features
70 _qcow2_dump_header --no-filter-compression | grep incompatible_features
78 _qcow2_dump_header --no-filter-compression | grep incompatible_features
90 _qcow2_dump_header --no-filter-compression | grep incompatible_features
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| A D | 242.out | 15 compression type: COMPRESSION_TYPE
37 compression type: COMPRESSION_TYPE
71 compression type: COMPRESSION_TYPE
113 compression type: COMPRESSION_TYPE
164 compression type: COMPRESSION_TYPE
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| A D | 287.out | 3 === Testing compression type incompatible bit setting for zlib ===
8 === Testing compression type incompatible bit setting for zstd ===
23 === Testing compression type values ===
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| A D | 082.out | 20 compression type: COMPRESSION_TYPE
34 compression type: COMPRESSION_TYPE
55 compression_type=<str> - Compression method used for image cluster compression
81 compression_type=<str> - Compression method used for image cluster compression
107 compression_type=<str> - Compression method used for image cluster compression
133 compression_type=<str> - Compression method used for image cluster compression
332 compression type: COMPRESSION_TYPE
345 compression type: COMPRESSION_TYPE
642 compression type: COMPRESSION_TYPE
655 compression type: COMPRESSION_TYPE
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| A D | 198.out | 39 compression type: COMPRESSION_TYPE
85 compression type: COMPRESSION_TYPE
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| A D | 206.out | 21 compression type: COMPRESSION_TYPE
45 compression type: COMPRESSION_TYPE
69 compression type: COMPRESSION_TYPE
95 compression type: COMPRESSION_TYPE
112 compression type: COMPRESSION_TYPE
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| A D | 274.out | 50 compression type: COMPRESSION_TYPE
76 compression type: COMPRESSION_TYPE
108 compression type: COMPRESSION_TYPE
132 compression type: COMPRESSION_TYPE
164 compression type: COMPRESSION_TYPE
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| A D | 302.out | 20 compression type: COMPRESSION_TYPE
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| A D | 314.out | 8 === Testing rebase with compression onto no backing file ===
24 === Testing rebase with compression with raw backing file ===
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| A D | 061.out | 554 compression type: COMPRESSION_TYPE
583 compression type: COMPRESSION_TYPE
600 compression type: COMPRESSION_TYPE
616 compression type: COMPRESSION_TYPE
630 compression type: COMPRESSION_TYPE
645 compression type: COMPRESSION_TYPE
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| /qemu/qapi/ |
| A D | migration.json | 793 # @multifd-compression: Which compression method to use. Defaults to
798 # where 0 means no compression, 1 means the best compression
804 # the best compression speed, and 9 means the best compression
809 # where 0 means no compression, 1 means the best compression
974 # @multifd-compression: Which compression method to use. Defaults to
979 # where 0 means no compression, 1 means the best compression
985 # the best compression speed, and 9 means the best compression
990 # where 0 means no compression, 1 means the best compression
1189 # where 0 means no compression, 1 means the best compression
1195 # the best compression speed, and 9 means the best compression
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| A D | dump.json | 19 # zlib compression
22 # compression
25 # snappy compression
28 # compression (since 8.2)
31 # compression (since 8.2)
34 # compression (since 8.2)
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| /qemu/ |
| A D | meson_options.txt | 200 description: 'lzo compression support')
218 description: 'snappy compression support')
250 description: 'JPEG lossy compression for VNC server')
265 description: 'zstd compression support')
271 description: 'QATzip compression support')
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| /qemu/docs/system/arm/ |
| A D | nuvoton.rst | 77 * Encoding compression engine
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| /qemu/docs/interop/ |
| A D | qcow2.txt | 119 a non-default compression is used for compressed
212 Defines the compression method used for compressed clusters.
213 All compressed clusters in an image use the same compression
218 compression type). Otherwise, this field must not be present
221 Available compression type values:
225 The deflate compression type is called "zlib"
227 deflate compression type do not have zlib headers.
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| A D | dbus.rst | 13 - background tasks (compression, streaming etc)
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| /qemu/docs/tools/ |
| A D | qemu-img.rst | 112 For qcow2, the compression algorithm can be specified with the ``-o
429 Only the formats ``qcow`` and ``qcow2`` support compression. The
430 compression is read-only. It means that if a compressed sector is
785 on Windows), optional AES encryption, zlib or zstd based compression and
804 This option configures which compression algorithm will be used for
808 with the ``compress`` filter driver or backup block jobs with compression
812 ``compat=0.10``, only ``zlib`` compression is available.
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