ceph/src/spdk/dpdk/doc/guides/compressdevs/qat_comp.rst

   1 ..  SPDX-License-Identifier: BSD-3-Clause
   2     Copyright(c) 2018 Intel Corporation.
   3
   4 Intel(R) QuickAssist (QAT) Compression Poll Mode Driver
   5 =======================================================
   6
   7 The QAT compression PMD provides poll mode compression & decompression driver
   8 support for the following hardware accelerator devices:
   9
  10 * ``Intel QuickAssist Technology C62x``
  11 * ``Intel QuickAssist Technology C3xxx``
  12
  13
  14 Features
  15 --------
  16
  17 QAT compression PMD has support for:
  18
  19 Compression/Decompression algorithm:
  20
  21     * DEFLATE
  22
  23 Huffman code type:
  24
  25     * FIXED
  26
  27 Window size support:
  28
  29     * 32K
  30
  31 Checksum generation:
  32
  33     * CRC32, Adler and combined checksum
  34
  35 Limitations
  36 -----------
  37
  38 * Compressdev level 0, no compression, is not supported.
  39
  40 * Dynamic Huffman encoding is not yet supported.
  41
  42 Installation
  43 ------------
  44
  45 The QAT compression PMD is built by default with a standard DPDK build.
  46
  47 It depends on a QAT kernel driver, see :ref:`qat_kernel_installation`.