X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=doc%2Fguides%2Fcompressdevs%2Fqat_comp.rst;h=475c4a9f9f1cd44feec4eb9a87f71c2ad8fec5a2;hb=1b7b24389cee5baa421d334048782e3e99e7dec5;hp=b45f4a626935b5fc6a1f3b354a570e3357721162;hpb=d2054aad7a18172bc0f23b021ae932b97ac25245;p=dpdk.git diff --git a/doc/guides/compressdevs/qat_comp.rst b/doc/guides/compressdevs/qat_comp.rst index b45f4a6269..475c4a9f9f 100644 --- a/doc/guides/compressdevs/qat_comp.rst +++ b/doc/guides/compressdevs/qat_comp.rst @@ -9,6 +9,7 @@ support for the following hardware accelerator devices: * ``Intel QuickAssist Technology C62x`` * ``Intel QuickAssist Technology C3xxx`` +* ``Intel QuickAssist Technology DH895x`` Features @@ -18,11 +19,7 @@ QAT compression PMD has support for: Compression/Decompression algorithm: - * DEFLATE - -Huffman code type: - - * FIXED + * DEFLATE - using Fixed and Dynamic Huffman encoding Window size support: @@ -32,13 +29,20 @@ Checksum generation: * CRC32, Adler and combined checksum +Stateful operation: + + * Decompression only + Limitations ----------- * Compressdev level 0, no compression, is not supported. -* Dynamic Huffman encoding is not yet supported. -* Queue pairs are not thread-safe (that is, within a single queue pair, RX and TX from different lcores is not supported). +* Queue-pairs are thread-safe on Intel CPUs but Queues are not (that is, within a single + queue-pair all enqueues to the TX queue must be done from one thread and all dequeues + from the RX queue must be done from one thread, but enqueues and dequeues may be done + in different threads.) * No BSD support as BSD QAT kernel driver not available. +* Stateful compression is not supported. Installation @@ -46,4 +50,4 @@ Installation The QAT compression PMD is built by default with a standard DPDK build. -It depends on a QAT kernel driver, see :ref:`qat_kernel_installation`. +It depends on a QAT kernel driver, see :ref:`building_qat`.