Add some more details about dpdk-lcore-mask and remove
the recommendation to use it.
Signed-off-by: Kevin Traynor <ktray...@redhat.com>
---
vswitchd/vswitch.xml | 17 ++++++++++++-----
1 file changed, 12 insertions(+), 5 deletions(-)
diff --git a/vswitchd/vswitch.xml b/vswitchd/vswitch.xml
index 332d8890d..25b0989ac 100644
--- a/vswitchd/vswitch.xml
+++ b/vswitchd/vswitch.xml
@@ -335,11 +335,18 @@
</p>
<p>
- For performance reasons, it is best to set this to a single core on
- the system, rather than allow lcore threads to float.
+ The lowest set core will be assigned in DPDK as the DPDK main thread.
+ Other set bits will be assigned by DPDK as DPDK worker threads.
+ As OVS implements it's own threading for the datapath (see
+ <ref column="other_config" key="pmd-cpu-mask"/>), DPDK worker
+ threads will be unused.
</p>
<p>
- If not specified, the value will be determined by choosing the lowest
- CPU core from initial cpu affinity list. Otherwise, the value will be
- passed directly to the DPDK library.
+ If this option is specified, OVS main/handler/revalidator threads
+ will run on the selected DPDK main thread core.
+ </p>
+ <p>
+ If this option is not specified the value for DPDK initialization
+ will be auto-determined and OVS main/revalidator/handler threads will
+ float on the OVS cpu affinity list.
</p>
</column>
--
2.51.0
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