1. Compression Device Supported Functionality Matrices

1.1. Supported Feature Flags

Table 1.11 Features availability in compression drivers

Feature

i s a l

m l x 5

o c t e o n t x

q a t

z l i b

HW Accelerated

Y

Y

Y

CPU SSE

Y

CPU AVX

Y

CPU AVX2

Y

CPU AVX512

Y

CPU NEON

Stateful Compression

Stateful Decompression

Y

Pass-through

Y

OOP SGL In SGL Out

Y

Y

Y

OOP SGL In LB Out

Y

Y

Y

OOP LB In SGL Out

Y

Y

Y

Deflate

Y

Y

Y

Y

Y

LZS

LZ4

Y

Adler32

Y

Y

Y

Crc32

Y

Y

Y

Adler32&Crc32

Y

Y

xxHash32

Y

Fixed

Y

Y

Y

Y

Y

Dynamic

Y

Y

Y

Y

Y

LZ4 Dictionary ID

LZ4 Content Checksum

LZ4 Content Size

LZ4 Block Checksum

Y

LZ4 Block Independence

Y

Note

  • “Pass-through” feature flag refers to the ability of the PMD to let input buffers pass-through it, copying the input to the output, without making any modifications to it (no compression done).

  • “OOP SGL In SGL Out” feature flag stands for “Out-of-place Scatter-gather list Input, Scatter-gather list Output”, which means PMD supports different scatter-gather styled input and output buffers (i.e. both can consists of multiple segments).

  • “OOP SGL In LB Out” feature flag stands for “Out-of-place Scatter-gather list Input, Linear Buffers Output”, which means PMD supports input from scatter-gathered styled buffers, outputting linear buffers (i.e. single segment).

  • “OOP LB In SGL Out” feature flag stands for “Out-of-place Linear Buffers Input, Scatter-gather list Output”, which means PMD supports input from linear buffer, outputting scatter-gathered styled buffers.