From: Sitsofe Wheeler <sitsofe@yahoo.com>
Date: Sun, 25 Jun 2017 22:09:07 +0000 (+0100)
Subject: HOWTO: note that crc32c will automatically use hw
X-Git-Tag: fio-2.99~29
X-Git-Url: https://git.kernel.dk/?p=fio.git;a=commitdiff_plain;h=a58963007a3416b61a72fa3df7e140eca7aa9a87

HOWTO: note that crc32c will automatically use hw

- Add note that crc32c checksumming will automatically use hardware
  acceleration if possible.
- Add note that crc32c-intel is just a synonym for crc32c.

Signed-off-by: Sitsofe Wheeler <sitsofe@yahoo.com>
---

diff --git a/HOWTO b/HOWTO
index 7dc08e26..2007dc04 100644
--- a/HOWTO
+++ b/HOWTO
@@ -2373,13 +2373,14 @@ Verification
 			header of each block.
 
 		**crc32c**
-			Use a crc32c sum of the data area and store it in the header of each
-			block.
+			Use a crc32c sum of the data area and store it in the header of
+			each block. This will automatically use hardware acceleration
+			(e.g. SSE4.2 on an x86 or CRC crypto extensions on ARM64) but will
+			fall back to software crc32c if none is found. Generally the
+			fatest checksum fio supports when hardware accelerated.
 
 		**crc32c-intel**
-			Use hardware assisted crc32c calculation provided on SSE4.2 enabled
-			processors. Falls back to regular software crc32c, if not supported
-			by the system.
+			Synonym for crc32c.
 
 		**crc32**
 			Use a crc32 sum of the data area and store it in the header of each