Hi Simon,
On Thu, 1 Jun 2023 at 03:13, Simon Glass sjg@chromium.org wrote:
Hi Jonathan,
On Wed, 31 May 2023 at 06:52, Jonathan Liu net147@gmail.com wrote:
Hi All,
I noticed that loading from squashfs with zstd compression is significantly slower than ext4 on RK3399 using U-Boot 2022.01. The filesystem is located on eMMC.
I have CONFIG_BLOCK_CACHE=y in .config and am using the generic load command.
ext4: 15682578 bytes read in 366 ms (40.9 MiB/s)
SquashFS with zstd compression: 15685001 bytes read in 2339 ms (6.4 MiB/s)
Any suggestions on how to speed up loading from SquashFS with zstd compression?
Could it just be that zstd is slow? Have you tried lz4?
I tried LZ4 but get "Error: unknown compression type." It seems the SquashFS decompressor only supports lzo, gzip and zstd - https://source.denx.de/u-boot/u-boot/-/blob/master/fs/squashfs/sqfs_decompre...
ext4: 15682578 bytes read in 366 ms (40.9 MiB/s)
SquashFS with lzo compression (~129 MiB squashfs): 15686657 bytes read in 1032 ms (14.5 MiB/s)
SquashFS with gzip compression (~116 MiB squashfs): 15686657 bytes read in 1494 ms (10 MiB/s)
SquashFS with zstd compression (~107 MiB squashfs): 15685001 bytes read in 2339 ms (6.4 MiB/s)
Regards, Jonathan