> > On Aug 6, 2009, at 1:00 PM, Lutz Jaenicke wrote: > >> With the mpc8...@400mhz I get a throughput of approx. > 24500 frames/s > >> using the predefined firewall rules. > > >> With the MPC8313 I get a significantly lower value: > >> mpc8...@250mhz 12500fps > >> mpc8...@333mhz 14500fps > >> mpc8...@416mhz 15500fps (333MHz type, overclocked) > > > What DDR frequencies (and width) are you running the 8343 > vs 8313 at. > > This can have a significant impact on performance. > > The 8343 is running DDR2 32bit at 266MHz (CSB 266MHz) > The 8313 is running DDR2 32bit at 333MHz (CSB 166MHz) > > The test were performed with 128byte frames so that the overall > bandwidth needed is far below even 100Mbit/s.
The CSB bus freq is key for the throught. CSB freq of 8313 is lower than 8343, it will cause the performance degrade. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
