linux-kernel - [PATCH 0/2] erofs: support deflate decompress by using Intel QAT

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Message-ID: <20250410042048.3044-1-liubo03@inspur.com>
Date: Thu, 10 Apr 2025 00:20:46 -0400
From: Bo Liu <liubo03@...pur.com>
To: <xiang@...nel.org>, <chao@...nel.org>
CC: <linux-erofs@...ts.ozlabs.org>, <linux-kernel@...r.kernel.org>, Bo Liu
	<liubo03@...pur.com>
Subject: [PATCH 0/2] erofs: support deflate decompress by using Intel QAT

This patch introdueces the use of the Intel QAT to decompress compressed
data in the EROFS filesystem, aiming to improve the decompression speed
of compressed datea.

We created a 285MiB compressed file and then used the following command to
create EROFS images with different cluster size.
     # mkfs.erofs -zdeflate,level=9 -C16384

fio command was used to test random read and small random read(~5%) and
sequential read performance.
     # fio -filename=testfile  -bs=4k -rw=read -name=job1
     # fio -filename=testfile  -bs=4k -rw=randread -name=job1
     # fio -filename=testfile  -bs=4k -rw=randread --io_size=14m -name=job1

Here are some performance numbers for reference:

Processors: Intel(R) Xeon(R) 6766E(144 core)
Memory:     521 GiB

|-----------------------------------------------------------------------------|
|           | Cluster size | sequential read | randread  | small randread(5%) |
|-----------|--------------|-----------------|-----------|--------------------|
| Intel QAT |    4096      |    538  MiB/s   | 112 MiB/s |     20.76 MiB/s    |
| Intel QAT |    16384     |    699  MiB/s   | 158 MiB/s |     21.02 MiB/s    |
| Intel QAT |    65536     |    917  MiB/s   | 278 MiB/s |     20.90 MiB/s    |
| Intel QAT |    131072    |    1056 MiB/s   | 351 MiB/s |     23.36 MiB/s    |
| Intel QAT |    262144    |    1145 MiB/s   | 431 MiB/s |     26.66 MiB/s    |
| deflate   |    4096      |    499  MiB/s   | 108 MiB/s |     21.50 MiB/s    |
| deflate   |    16384     |    422  MiB/s   | 125 MiB/s |     18.94 MiB/s    |
| deflate   |    65536     |    452  MiB/s   | 159 MiB/s |     13.02 MiB/s    |
| deflate   |    65536     |    452  MiB/s   | 177 MiB/s |     11.44 MiB/s    |
| deflate   |    262144    |    466  MiB/s   | 194 MiB/s |     10.60 MiB/s    |

Bo Liu (2):
  erofs: remove duplicate code
  erofs: support deflate decompress by using Intel QAT

 fs/erofs/decompressor_deflate.c | 145 +++++++++++++++++++++++++++++++-
 fs/erofs/internal.h             |   1 +
 fs/erofs/sysfs.c                |  30 +++++++
 fs/erofs/zdata.c                |   1 -
 4 files changed, 175 insertions(+), 2 deletions(-)

-- 
2.31.1