Thank you Billy. On Thu, Aug 30, 2018 at 12:24 PM O Mahony, Billy <billy.o.mah...@intel.com> wrote:
> Hi Sara, > > > > A colleague of mine had a lot of difficulty using dpctl/add-flow to add > flow directly to the datapath. And the man-page is a little lukewarm on > it’s usage too albeit you are just debugging (ovs-vswitchd (8)- DATAPATH > FLOW TABLE DEBUGGING COMMANDS) . Also you will find that whatever rules you > can insert will be very shortly deleted again by the revalidator thread as > they will not correspond to any existing ofproto rule. > > > > You should set up flows using ofctl then generate packets to match those > flows and you should be able to monitor the netlink messages exchanged > between vswitchd and the vswitch .ko as the megaflow is installed to the > kernel module. I don’t know how you might monitor the netlink messages - > ip-monitor (8) is a possibility. Turning on vswitchd debug in the relevant > module is another possibility. > > > > Hope some of that helps, > > > > Billy. > > > > > > > > *From:* Sara Gittlin [mailto:sara.gitt...@gmail.com] > *Sent:* Thursday, August 30, 2018 9:44 AM > *To:* O Mahony, Billy <billy.o.mah...@intel.com> > *Cc:* Ben Pfaff <b...@ovn.org>; ovs-discuss@openvswitch.org > *Subject:* Re: [ovs-discuss] Mega-flow generation > > > > i think i can 'ride on' the callback "dpctl_put_flow" - which is invoked > whenever the cli 'ovs-dpctl add-flow' is executed.correct ? > > > > On Thu, Aug 30, 2018 at 10:32 AM Sara Gittlin <sara.gitt...@gmail.com> > wrote: > > Billy, > > Can you please refer me to the code where we start the megaflow creation > to the kernel upon an upcall, and where we send it to the kernel via the > netlink socket ? > > what i want to do is - to generate megaflows, based on openflow tables, > not neccesararily upon an upcall, that is not reactive mode and to send to > the kernel. > > Another question is, who is responsible to associate a specific > megaflow to the appropriate table in the cache ? is it the kernel > module or vswitchd ? > > Thank you > > -Sara > > > > > > On Tue, Aug 28, 2018 at 1:12 PM Sara Gittlin <sara.gitt...@gmail.com> > wrote: > > Thank you Ben and Billy > > -Sara > > > > On Tue, Aug 28, 2018 at 11:27 AM O Mahony, Billy <billy.o.mah...@intel.com> > wrote: > > Hi Sara, > > This article > https://software.intel.com/en-us/articles/ovs-dpdk-datapath-classifier > gives practical overview of how megaflows, aka wildcarded or datapath > flows, work at least in the ovs-dpdk (userspace datapath) context. > > Regards, > Billy > > > -----Original Message----- > > From: ovs-discuss-boun...@openvswitch.org [mailto:ovs-discuss- > > boun...@openvswitch.org] On Behalf Of Ben Pfaff > > Sent: Monday, August 27, 2018 5:10 PM > > To: Sara Gittlin <sara.gitt...@gmail.com> > > Cc: ovs-discuss@openvswitch.org > > Subject: Re: [ovs-discuss] Mega-flow generation > > > > On Mon, Aug 27, 2018 at 02:46:19PM +0300, Sara Gittlin wrote: > > > Can someone refer me to the code of the megaflow generation process ? > > > Is this process invoked by an upcall from the kernel module ? like in > > > microflow ? > > > > Did you read the OVS paper? It's all about megaflows. > > http://www.openvswitch.org/support/papers/nsdi2015.pdf > > _______________________________________________ > > discuss mailing list > > disc...@openvswitch.org > > https://mail.openvswitch.org/mailman/listinfo/ovs-discuss > >
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