Re: [PATCH 2/2] crypto: powerpc: Add POWER8 optimised crc32c
From: Herbert Xu <herbert@gondor.apana.org.au>
Date: 2016-07-05 15:14:40
Also in:
linux-crypto
From: Herbert Xu <herbert@gondor.apana.org.au>
Date: 2016-07-05 15:14:40
Also in:
linux-crypto
On Fri, Jul 01, 2016 at 08:19:45AM +1000, Anton Blanchard wrote:
From: Anton Blanchard <redacted>
Use the vector polynomial multiply-sum instructions in POWER8 to
speed up crc32c.
This is just over 41x faster than the slice-by-8 method that it
replaces. Measurements on a 4.1 GHz POWER8 show it sustaining
52 GiB/sec.
A simple btrfs write performance test:
dd if=/dev/zero of=/mnt/tmpfile bs=1M count=4096
sync
is over 3.7x faster.
Signed-off-by: Anton Blanchard <redacted>Both patches applied. Thanks. -- Email: Herbert Xu [off-list ref] Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt