ok.I cross connect to 10GE port and use "pfsend -i dna0 -g 8 -l 64" to send
packets on dna0, while use "silidump -i dna1 -g 15 -w /mnt/disk1/" to capture
packets and save to disk. silidump written by my self reference from pfdump
demo code. pfsend send packets at speed of nearly 13Mpps so i am sure of the
pf_ring.ko and ixgbe.ko(DNA) was loaded corectly.silidump create on thread
dedicated capture pakcet by calling pfring_recv(pd, &buff, 0, &hdr, 1) within a
dead loop, and copy buff to another 2GB memaligned buffer while receive one
packet. in this manner pfring_stats shows packet drop.
key code like this:
for(;;){
if(pfring_recv(&pd, &buff, 0, &hdr, 1)>0){
memcpy(buff, hdr.len, alignedbuffer);
++pkt_cnt;
}
}
without memcpy pfring_stats shows no packet drop.
my server os is ubuntu 12.04 64bit version running on 2 xeon E2470 @2.3GHz each
has 8 core.
give any clue if you can. thanks and best regards :-)
> Hi, please explain in detail the tests you have made with complete command
> line options Luca > On 05 Jun 2015, at 02:02, tiankun zhang <zhangtiankun1988
> at gmail.com> wrote: > > appreciate your reply luca. one more question, i
> want to do packet > capture at line rate using PF_RING+DNA, i tested my
> program with 512 byte packet at 10Gbps , there's no packet drop. BUT with
> 256, 128,64 byte packet drop increased dramatically. actually, i use memcpy
> to copy packet to user space buffer. may this be the problem at high pps ?
> any idea for fixing it? looking forward reply thx π > > tiankun zhang
> <zhangtiankun1988 at gmail.com <mailto:zhangtiankun1988 at
> gmail.com>>δΊ2015εΉ΄6ζ4ζ₯ζζεειοΌ > >
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