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authorAhmed Zaki <ahmed.zaki@intel.com>2023-12-13 03:33:16 +0300
committerJakub Kicinski <kuba@kernel.org>2023-12-14 09:07:16 +0300
commit13e59344fb9d3c9d3acd138ae320b5b67b658694 (patch)
tree3f7a839e6f1077c04088aa3cdafa18e659357821 /Documentation/netlink
parentdcd8dbf9e734eb334113ea43186c1c26e9f497bb (diff)
downloadlinux-13e59344fb9d3c9d3acd138ae320b5b67b658694.tar.xz
net: ethtool: add support for symmetric-xor RSS hash
Symmetric RSS hash functions are beneficial in applications that monitor both Tx and Rx packets of the same flow (IDS, software firewalls, ..etc). Getting all traffic of the same flow on the same RX queue results in higher CPU cache efficiency. A NIC that supports "symmetric-xor" can achieve this RSS hash symmetry by XORing the source and destination fields and pass the values to the RSS hash algorithm. The user may request RSS hash symmetry for a specific algorithm, via: # ethtool -X eth0 hfunc <hash_alg> symmetric-xor or turn symmetry off (asymmetric) by: # ethtool -X eth0 hfunc <hash_alg> The specific fields for each flow type should then be specified as usual via: # ethtool -N|-U eth0 rx-flow-hash <flow_type> s|d|f|n Reviewed-by: Wojciech Drewek <wojciech.drewek@intel.com> Signed-off-by: Ahmed Zaki <ahmed.zaki@intel.com> Link: https://lore.kernel.org/r/20231213003321.605376-4-ahmed.zaki@intel.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'Documentation/netlink')
-rw-r--r--Documentation/netlink/specs/ethtool.yaml4
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/netlink/specs/ethtool.yaml b/Documentation/netlink/specs/ethtool.yaml
index 5c7a65b009b4..197208f419dc 100644
--- a/Documentation/netlink/specs/ethtool.yaml
+++ b/Documentation/netlink/specs/ethtool.yaml
@@ -908,6 +908,9 @@ attribute-sets:
-
name: hkey
type: binary
+ -
+ name: input_xfrm
+ type: u32
-
name: plca
attributes:
@@ -1598,6 +1601,7 @@ operations:
- hfunc
- indir
- hkey
+ - input_xfrm
dump: *rss-get-op
-
name: plca-get-cfg