Hi, Ben, Thanks for your response. "You realize that this will be terrible for performance, right?" In fact, I have not got all packets sent to user space. That is the problem I am facing now. I think performance might be another problem after I can receive all packet in user space.
Thanks, Xuemei On Thu, Jul 23, 2015 at 10:13 AM, Ben Pfaff <[email protected]> wrote: > On Thu, Jul 23, 2015 at 10:04:23AM -0700, Xuemei Liu wrote: > > I am new to ovs, and I am trying to send all packets from kernel space to > > user space. I comment the "unlikely(!flow)" in datapath/datapath.c. > > However, it seems I just receive the first packet of each flow (the first > > packet that match one forwarding rule in the bridge) in user space. Could > > anyone tell me why? and is there other way to achieve my goal? > > You realize that this will be terrible for performance, right? > > It's kind of a waste to modify the kernel module for this. I'd just > modify userspace to send all packets to userspace, something like this: > > diff --git a/ofproto/ofproto-dpif-xlate.c b/ofproto/ofproto-dpif-xlate.c > index 52395a7..a98406a 100644 > --- a/ofproto/ofproto-dpif-xlate.c > +++ b/ofproto/ofproto-dpif-xlate.c > @@ -4777,7 +4777,7 @@ xlate_actions(struct xlate_in *xin, struct xlate_out > *xout) > > ctx.xin = xin; > ctx.xout = xout; > - ctx.xout->slow = 0; > + ctx.xout->slow = SLOW_ACTION; > ctx.xout->has_learn = false; > ctx.xout->has_normal = false; > ctx.xout->has_fin_timeout = false; >
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