[dpdk-dev] [PATCH 1/3] cxgbe: Fix RX performance for cxgbe PMD.

[Rahul Lakkireddy]

Hi Thomas,

On Tue, Jul 07, 2015 at 23:30:38 +0200, Thomas Monjalon wrote:
> 2015-07-07 22:42, Rahul Lakkireddy:
> > CXGBE PMD rx allocates a new mbuf everytime, which could lead to performance
> > hit.  Instead, do bulk allocation of mbufs and re-use them.
> > 
> > Also, simplify the overall rx-handler, and update its logic to fix rx perf.
> 
> For such change, it would be nice to provide some benchmark numbers.
> Thanks

On my setup having T580-CR card which is 2-port 40G, I see Rx PPS improving for
64 byte size from ~25Mpps to ~37Mpps on single port.  Similarly, roughly 10
Mpps improvement is seen for dual port also.

And for IO size 128 bytes, approx. 3Mpps improvement is seen.
Of course, my setup is not a powerful one as used by our QA team.
Nevertheless, the improvement is visible in my setup also.

Thanks,
Rahul