> -----Original Message----- > From: venkatakrishna pari [mailto:[email protected]] > Sent: Tuesday, October 01, 2013 7:12 AM > To: [email protected] > Subject: [E1000-devel] ixgbe drivers went to KDB when enable separate Q > vector for rx and tx > > Hi ALl, > > I am working latest ixgbe driver of 3.16.1. I changed to code in the > ixgbe_set_interrupt_capability to generates separate Q vectors rx and tx. I > configured two queues rx and tx each. It able to generates four Q vector for > rx-0,rx-1,tx-0 and tx-1. But ixgbe driver went to KDB in > ixgbe_msix_clean_rings. I debugged ixge drivers. if found that q_vector- > >tx.ring and q_vector->rx.ring goes to NULL Values. I could see values of > q_vector,q_vector->tx.ring and q_vector->rx.ring in the > ixgbe_request_msix_irqs. > > It is working fine when using single q_vector for TxRx. I don't see much code > difference between single Q vector TxRx and separate Q vector for rx and tx. > > Please i don't understand why q_vector->rx.ring and q_vector->tx.ring > values were zero. > > Please some one guide to debubg ixgbe driver of 3.16.1. > > Thanks and Regard's > venkat
The ixgbe driver is designed to take advantage that we always assign queues in queue pairs. In fact not doing so will mess up offloads that our on by default like ATR. I'm not saying it can't be done just it will take more work than just modifying ixgbe_set_interrupt_capability(). The reason you see the following conditional (if (q_vector->rx.ring || q_vector->tx.ring)) hit in ixgbe_msix_clean_rings() is that you most likely only have one of the ring structures populated since now you only have an Tx or Rx queue on that vector. Thanks, -Don <[email protected]> ------------------------------------------------------------------------------ October Webinars: Code for Performance Free Intel webinars can help you accelerate application performance. Explore tips for MPI, OpenMP, advanced profiling, and more. Get the most from the latest Intel processors and coprocessors. See abstracts and register > http://pubads.g.doubleclick.net/gampad/clk?id=60134791&iu=/4140/ostg.clktrk _______________________________________________ E1000-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/e1000-devel To learn more about Intel® Ethernet, visit http://communities.intel.com/community/wired
