Add some information about the DPDK -c and -n parameters.
Signed-off-by: Kevin Traynor <[email protected]>
Reported-by: Zoltan Kiss <[email protected]>
---
INSTALL.DPDK.md | 14 ++++++++++++--
1 files changed, 12 insertions(+), 2 deletions(-)
diff --git a/INSTALL.DPDK.md b/INSTALL.DPDK.md
index 96b686c..ee016da 100644
--- a/INSTALL.DPDK.md
+++ b/INSTALL.DPDK.md
@@ -145,8 +145,18 @@ Using the DPDK with ovs-vswitchd:
DPDK configuration arguments can be passed to vswitchd via `--dpdk`
argument. This needs to be first argument passed to vswitchd process.
- dpdk arg -c is ignored by ovs-dpdk, but it is a required parameter
- for dpdk initialization.
+ The DPDK configuration arguments are passed to DPDK during DPDK
+ initialization.
+
+ The DPDK -c coremask is a required argument. To avoid wasted resources
+ only one core should be set. The standard OVS threads (e.g. main
+ process, handler, revalidator) will run on the core that is specified.
+
+ Note: Ideally the -c coremask should not overlap with any pmd-cpu-mask
+ setting where the DPDK polling threads will run to avoid cpu contention.
+
+ The DPDK -n argument is a required argument that is a DPDK optimization
+ for the number of memory channels. It is typically set to 4.
```
export DB_SOCK=/usr/local/var/run/openvswitch/db.sock
--
1.7.4.1
_______________________________________________
dev mailing list
[email protected]
http://openvswitch.org/mailman/listinfo/dev
