Hello Kevin, On Thu, 11 Sept 2025 at 15:33, Kevin Traynor <ktray...@redhat.com> wrote: > > 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 | 19 ++++++++++++++----- > 1 file changed, 14 insertions(+), 5 deletions(-) > > diff --git a/vswitchd/vswitch.xml b/vswitchd/vswitch.xml > index 332d8890d..ba0b8e839 100644 > --- a/vswitchd/vswitch.xml > +++ b/vswitchd/vswitch.xml > @@ -335,11 +335,20 @@ > </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
Nit: its* > + <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, all OVS main, handler, and revalidator > + threads will be pinned to the selected DPDK main thread core. > + This means that potentially many threads will share a single CPU > + core, which may not be desirable for performance reasons. > + </p> > + <p> > + If this option is not specified the value for DPDK initialization > + will be auto-determined and all OVS main, revalidator and handler > + threads will float on the OVS cpu affinity list. > </p> > </column> Reviewed-by: David Marchand <david.march...@redhat.com> -- David Marchand _______________________________________________ dev mailing list d...@openvswitch.org https://mail.openvswitch.org/mailman/listinfo/ovs-dev
