Hi Anand, Each of the VF would get the default traffic TC so they would all share the same FC, much like applications using the same port on the PF. So you are correct one very active VM could force FC on another VM even if it is doing very little traffic. If you wanted each VM to avoid sharing the FC you could directly assign a given port to a give VM. Of course that would mean you would need one port for each VM which may be problematic for you.
Thanks, -Don Skidmore <donald.c.skidm...@intel.com> > -----Original Message----- > From: anandvelu thulasiram [mailto:anand...@gmail.com] > Sent: Wednesday, July 31, 2013 4:53 PM > To: e1000-devel@lists.sourceforge.net > Subject: [E1000-devel] 82599 Flow control functionality for VF > > Hi , > Greetings! > This mail regarding Flow control. > We know that the 82599 supports flow control as defined in 802.3x, as well as > the specific operation of asymmetrical flow control defined by 802.3z. The > 82599 also supports Priority Flow Control (PFC), sometimes referred to as > Class Based Flow Control or (CBFC), as part of the DCB architecture > > What we would like to know is how it work if we have multiple VF's > > For example if we have created 2 VF's (VF1 & VF2) belonging to the same > port > 1) Each of the VF is assigned to a different VM > 2) Each VF is having its own MAC > 3) if one of the VF1 is flooded with More traffic and ran out of descriptor. > on > the other hand there is minimal traffic on VF2 > 4) since we ran out descriptor on VF1, how the flow control will be sent to > the PEER who is trasmitting the packet to VF1 > 5) Will it affect VF2 data flow. > > Thanks in advance! > --Anand ------------------------------------------------------------------------------ Get your SQL database under version control now! Version control is standard for application code, but databases havent caught up. So what steps can you take to put your SQL databases under version control? Why should you start doing it? Read more to find out. http://pubads.g.doubleclick.net/gampad/clk?id=49501711&iu=/4140/ostg.clktrk _______________________________________________ E1000-devel mailing list E1000-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/e1000-devel To learn more about Intel® Ethernet, visit http://communities.intel.com/community/wired
