Messages in this thread | | | Subject | Re: skb->truesize > sk->rcvbuf == Dropped packets | From | mike_phillips@urscorp ... | Date | Thu, 3 May 2001 20:24:07 -0300 |
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>> I can implement one solution by copying the received packets into skb's
>> with the correct length, but that eliminates the performance gains from
>> simply swapping buffers around (and would definately mean no zero-copy).
> Generally it is a win to copy rather than swap buffers when the frame does > not occupy most of the buffer. Most traffic is very small or MTU sized > frames (and on TR of course ethernet not TR mtu frames are popular)
Any suggestions on heuristics for this ? Say maybe copy if skb->len <= eth_max_mtu, skb->len <= skb->truesize * .5, or just copy the packets no matter what size.
Mike
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