[Linux-ATM-General] Performance of ATM 8260 driver

[Peter 'p. De S. <p2...@mi...>]

Hi,

I'm having some performance problems with the ATM 8260 driver. I'm using
a custom MPC8260 based board. The CPU core runs at 300Mhz and the CPM
runs at 200Mhz. 1 FCC is configured for fast ethernet, 1 is configured
for ATM and connected to a Zarlink MT90503 via an 8bit Utopia interface.
the Utopia interface is clocked at 50Mhz. The 3th FCC is unused. The
maximum bitrate I manage to get out of the 8260 is about 2Mbit/s. I use
1 VC in UBR mode. The transmitter is configured for internal rate.=20

Any ideas why the maximum throughput I get is about 2Mbit/s ?

Thanks,

Peter.