Hi Ben, Thanks a lot for response.
data flow means Ethernet net packet traversing, so my doubt is: 1) After the packet receiving from Ethernet driver packet will traverse in kernel space or in user space. 2) This rule is applicable for all packet or first packet Thanks, Vivek -----Original Message----- From: Ben Pfaff [mailto:b...@nicira.com] Sent: Wednesday, November 20, 2013 10:41 PM To: Vivek Kumar (EPG) Cc: disc...@openvswitch.org; dev@openvswitch.org Subject: Re: Datpath in openVswitch On Wed, Nov 20, 2013 at 10:40:31AM +0000, Vivek Kumar (EPG) wrote: > 1) could you please confirm in OpenVswitch data flow to be @ kernel level or > user level. What's a data flow? > 2) As some document says that When the first packet of a flow comes to > the datapath, the datapath transmit it to the userspace using netlink. > Does the datapath buffer the packet? Or it is just buffered in > userspace? The datapath does not buffer. > 3) Will this (first)packet traversing from kernel to user space and > user space to kernel space affect the performance. Yes. > 4) It seems that datapath flow entry is 5 seconds time-out, then how > soon is the facet time_out? Where can I find the code of time_out? Or > can we change time out value. The maximum timeout is 5 seconds. ofproto-dpif.c. Modify the code. _______________________________________________ dev mailing list dev@openvswitch.org http://openvswitch.org/mailman/listinfo/dev
