Hi Donald,
Thanks you for response. Here i have one more question. I separated two
function for rx and tx Q vectors likes ixgbe_msix_clean_rx and
ixgbe_msix_clean_tx in the as below in a ixgbe_request_msix_irqs. Now it
didn't hits kdb. But i kept print statements in _clean_rx and _clean_tx.
But it prints q_vector->tx.ring and q_vector->rx.ring values were NULL. I
could see values of q_vector,q_vector->name,q_vector,q_vector->rx.ring and
q_vector->tx.ring values in ixgbe_request_msix_irqs. I don't understand why
q_vector->tx.ring value was NULL in the ixgbe_msix_clean_tx and
q_vector->rx.ring value was NULL ixgbe_msix_clean_rx.
#define SET_HANDLER(_v) (((_v)->rx.ring && (_v)->tx.ring) \
? &ixgbe_msix_clean_ring : \
(_v)->rx.ring ? &ixgbe_msix_clean_rx : \
(_v)->tx.ring ? &ixgbe_msix_clean_tx : \
NULL)
if(handler == &ixgbe_msix_clean_rx) {
snprintf(q_vector->name, sizeof(q_vector->name) - 1,
"%s-%s-%d", netdev->name, "rx", ri++);
}else if(handler == &ixgbe_msix_clean_tx) {
snprintf(q_vector->name, sizeof(q_vector->name) - 1,
"%s-%s-%d", netdev->name, "tx", ti++);
}else if (handler == &ixgbe_msix_clean_rings){
snprintf(q_vector->name, sizeof(q_vector->name) - 1,
"%s-%s-%d", netdev->name, "TxRx", ri++);
ti++;
} else{
/* skip this unused q_vector */
continue;
}
err = request_irq(entry->vector, handler, 0,
q_vector->name, q_vector);
Now I could see rx and tx interrupts in "cat /proc/interrupts" also.
Thanks and Regard's
venkat
On Tue, Oct 1, 2013 at 10:32 PM, Skidmore, Donald C <
[email protected]> wrote:
> > -----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]>
>
>
>
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