Looks good, thanks. Ethan
On Mon, May 14, 2012 at 11:18 AM, Ben Pfaff <b...@nicira.com> wrote: > Signed-off-by: Ben Pfaff <b...@nicira.com> > --- > vswitchd/ovs-vswitchd.8.in | 43 +++++++++++++++++++++++++++++++++++++++++++ > 1 files changed, 43 insertions(+), 0 deletions(-) > > diff --git a/vswitchd/ovs-vswitchd.8.in b/vswitchd/ovs-vswitchd.8.in > index 6c9f3e4..bfd70fb 100644 > --- a/vswitchd/ovs-vswitchd.8.in > +++ b/vswitchd/ovs-vswitchd.8.in > @@ -207,6 +207,49 @@ enabled. > .so ofproto/ofproto-unixctl.man > .so lib/vlog-unixctl.man > .so lib/stress-unixctl.man > +. > +.SH "LIMITS" > +. > +.PP > +We believe these limits to be accurate as of this writing. These > +limits assume the use of the Linux kernel datapath. > +. > +.IP \(bu > +Approximately 256 bridges given the allowance of 5,000 file > +descriptors that \fBovs\-ctl\fR(8) configures. (\fBovs\-vswitchd\fR > +requires 17 file descriptors per datapath.) > +. > +.IP \(bu > +65,280 ports per bridge. Performance will degrade beyond 1,024 ports > +per bridge due to fixed hash table sizing. > +. > +.IP \(bu > +2,048 MAC learning entries per bridge. > +. > +.IP \(bu > +Kernel flows are limited only by memory available to the kernel. > +Performance will degrade beyond 1,048,576 kernel flows per bridge with > +a 32-bit kernel, beyond 262,144 with a 64-bit kernel. > +(\fBovs\-vswitchd\fR should never install anywhere near that many > +flows.) > +. > +.IP \(bu > +OpenFlow flows are limited only by available memory. Performance is > +linear in the number of unique wildcard patterns. That is, an > +OpenFlow table that contains many flows that all match on the same > +fields in the same way has a constant-time lookup, but a table that > +contains many flows that match on different fields requires lookup > +time linear in the number of flows. > +. > +.IP \(bu > +255 ports per bridge participating in 802.1D Spanning Tree Protocol. > +. > +.IP \(bu > +32 mirrors per bridge. > +. > +.IP \(bu > +15 bytes for the name of a port. (This is a Linux kernel limitation.) > +. > .SH "SEE ALSO" > .BR ovs\-appctl (8), > .BR ovs\-brcompatd (8), > -- > 1.7.2.5 > > _______________________________________________ > dev mailing list > dev@openvswitch.org > http://openvswitch.org/mailman/listinfo/dev _______________________________________________ dev mailing list dev@openvswitch.org http://openvswitch.org/mailman/listinfo/dev
