Ajith sock_wmalloc fails when system resources are exhausted, this is not tuneable via pf_ring. You probably saw the comment that invite you to "do your own algorithmic backoffs".
Regards Alfredo On Oct 17, 2012, at 11:35 AM, Ajith Adapa <[email protected]> wrote: > At packet size 1500 bytes I have observed that ring_sendmsg call fails as > sock_wmalloc is failed .. > > might be becos I have used more than the memory allotted for send buffer of > the socket. > > So should I increase the socket buffer size ?? currently I am using the > default values. > > Regards, > Ajith > > > On Wed, Oct 17, 2012 at 1:59 PM, Luca Deri <[email protected]> wrote: > On 10/17/2012 10:19 AM, Ajith Adapa wrote: >> But does NAPI comes into picture in case of packet transmission ?? > it does not > >> >> Yeah I have observed that PF_RING has an advantage of 10-15% but both the >> application hardly can generate at half the rate. > I know, standard PF_RING focuses on RX > > Luca > >> But seems PF_RING uses more processing power sometimes around 20-30% more >> than a PACKET_MMAP application. >> >> Regards, >> Ajith >> >> >> On Wed, Oct 17, 2012 at 1:28 PM, Luca Deri <[email protected]> wrote: >> Ajith, >> PF_RING is 5-10% faster so they are basically alike as with NAPI the >> performance penalty is there >> >> Luca >> >> >> On 10/17/2012 08:33 AM, Ajith Adapa wrote: >>> Hi, >>> >>> I am trying to understand the basic performance differences between linux >>> kernel supported PACKET_MMAP and PF_RING (without any DNA and modified >>> drivers). >>> >>> Have you got any numbers regarding transmission performance with basic >>> PF_RING and PACKET_MMAP ?? >>> >>> Regards, >>> Ajith >>> >>> >>> _______________________________________________ >>> Ntop-misc mailing list >>> [email protected] >>> http://listgateway.unipi.it/mailman/listinfo/ntop-misc >> >> >> _______________________________________________ >> Ntop-misc mailing list >> [email protected] >> http://listgateway.unipi.it/mailman/listinfo/ntop-misc >> >> >> >> >> _______________________________________________ >> Ntop-misc mailing list >> [email protected] >> http://listgateway.unipi.it/mailman/listinfo/ntop-misc > > > _______________________________________________ > Ntop-misc mailing list > [email protected] > http://listgateway.unipi.it/mailman/listinfo/ntop-misc > > > _______________________________________________ > Ntop-misc mailing list > [email protected] > http://listgateway.unipi.it/mailman/listinfo/ntop-misc
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