On Fri, 2017-09-01 at 12:54 +0200, Jesper Dangaard Brouer wrote: > The ixgbe driver have page recycle scheme based around the RX-ring > queue, where a RX page is shared between two packets. Based on the > refcnt, the driver can determine if the RX-page is currently only > used > by a single packet, if so it can then directly refill/recycle the > RX-slot by with the opposite "side" of the page. > > While this is a clever trick, it is hard to determine when this > recycling is successful and when it fails. Adding a counter, which > is > available via ethtool --statistics as 'alloc_rx_page'. Which counts > the number of times the recycle fails and the real page allocator is > invoked. When interpreting the stats, do remember that every alloc > will serve two packets. > > The counter is collected per rx_ring, but is summed and ethtool > exported as 'alloc_rx_page'. It would be relevant to know what > rx_ring that cannot keep up, but that can be exported later if > someone experience a need for this. > > Signed-off-by: Jesper Dangaard Brouer <bro...@redhat.com>
Since Alex has a suggested change for this patch, when you resubmit v2, can you make sure you CC intel-wired-lan mailing list, so that my patchwork project picks up this patch? Thanks in advance Jesper.
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