[dpdk-dev] ixgbe vector mode not working.

[Thomas Monjalon]

2015-02-28 03:33, Liang, Cunming:
> Hi Stephen,
> 
> The root cause is about the rx descriptor number.
> As we use below code to quick process the rx_tail wrap, it require rxd value is a 2^n.
> "rxq->rx_tail = (uint16_t)(rxq->rx_tail & (rxq->nb_rx_desc - 1));"
> We should add more checking on the input rxd, if checking fail, then tend to use scalar pmd.
> Thanks for the report, I'll send fix patch soon.

Fixed in http://dpdk.org/browse/dpdk/commit/?id=352078e8e196
Thanks

> > -----Original Message-----
> > From: Stephen Hemminger [mailto:stephen at networkplumber.org]
> > Sent: Thursday, February 26, 2015 9:07 AM
> > To: Liang, Cunming
> > Cc: Nemeth, Balazs; Richardson, Bruce; Neil Horman; dev at dpdk.org
> > Subject: Re: ixgbe vector mode not working.
> > 
> > On Wed, 25 Feb 2015 08:49:48 +0000
> > "Liang, Cunming" <cunming.liang at intel.com> wrote:
> > 
> > > Hi Stephen,
> > >
> > > Thanks for the info, with rxd=4000, I can reproduce it.
> > > On that time, it runs out of mbuf.
> > > I'll follow up this issue.
> > 
> > The first time I ran it, the code was configure rx/tx conf
> > which was leftover from older versions.
> > 
> > Second time I ran it and the same hang happened.
> > Looking at mbuf pool statistics I see that it gets exhausted,
> > even when extra mbuf's are added to the pool.
> > 
> > Looks like a memory leak.