> -----Original Message----- > From: Ben Pfaff [mailto:b...@nicira.com] > Sent: Tuesday, April 21, 2015 4:08 PM > To: Loftus, Ciara > Cc: dev@openvswitch.org > Subject: Re: [ovs-dev] [PATCH RFC 0/1] dpif-netdev: Make EMC Size > Configurable > > On Tue, Apr 21, 2015 at 01:47:12PM +0100, Ciara Loftus wrote: > > This patch allows the user to specify the number of Exact Match Cache > > entries they wish to have available for their instance of the vswitch. > > This is a achieved by means of a 'configure' flag. > > > > At the moment, the default number of EMC entries is 1024, for which > > the switch should perform optimally up to this number of flows. > > However, if the user expects say roughly 2000 flows of traffic, an EMC > > with 2048 entries will perform better, allbeit with a larger demand on > > memory and time spent flushing the cache. If these requirements are > > acceptable to the user, they may choose to allocate 2048 entries like so, > > and in turn receive improved performance for their specific use case: > > > > './configure --with-emcsize=11' > > > > The number of entries is calculated as 2^11 = 2048. > > configure flags are really inconvenient. Is there a reason that this > can't be made configurable at runtime? It would be better yet if the > EMC size could automatically adjust itself.
Thanks for the feedback. The implementation is naturally more complex for a runtime configurable but I think achievable - I'll look into it. Thanks, Ciara _______________________________________________ dev mailing list dev@openvswitch.org http://openvswitch.org/mailman/listinfo/dev
