svn commit: r268837 - head/sys/netinet
Author: adrian
Date: Fri Jul 18 08:22:13 2014
New Revision: 268837
URL: http://svnweb.freebsd.org/changeset/base/268837
Log:
Update the default RSS hash to the Chelsio T5 firmware one - it provides
markedly better distribution of IPv6 address/ports than the previous key.
The previous key would hash large swaths of the port space for a given
source/destination IP address to the same low handful of bits, effectively
mapping them to the same queue. This made testing very .. special.
Modified:
head/sys/netinet/in_rss.c
Modified: head/sys/netinet/in_rss.c
==============================================================================
--- head/sys/netinet/in_rss.c Fri Jul 18 08:08:45 2014 (r268836)
+++ head/sys/netinet/in_rss.c Fri Jul 18 08:22:13 2014 (r268837)
@@ -149,16 +149,16 @@ SYSCTL_INT(_net_inet_rss, OID_AUTO, base
*
* XXXRW: And that we don't randomize it yet!
*
- * XXXRW: This default is actually the default key from Chelsio T3 cards, as
+ * XXXRW: This default is actually the default key from Chelsio T5 cards, as
* it offers reasonable distribution, unlike all-0 keys which always
* generate a hash of 0 (upsettingly).
*/
-static uint8_t rss_key[RSS_KEYSIZE] = {
+static uint8_t rss_key[RSS_KEYSIZE] = {
+ 0xbe, 0xac, 0x01, 0xfa, 0x6a, 0x42, 0xb7, 0x3b,
+ 0x80, 0x30, 0xf2, 0x0c, 0x77, 0xcb, 0x2d, 0xa3,
+ 0xae, 0x7b, 0x30, 0xb4, 0xd0, 0xca, 0x2b, 0xcb,
0x43, 0xa3, 0x8f, 0xb0, 0x41, 0x67, 0x25, 0x3d,
0x25, 0x5b, 0x0e, 0xc2, 0x6d, 0x5a, 0x56, 0xda,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
};
/*
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