[lwip-users] help! Problem in udp performance between with_os and no_os.

[wang youramulet]

hi,

I have ported the lwip into philips PNX1500 with psos.

there is a problem:

 

The udp demo programmed with rawAPI.

It can send data on 11Mbytes/sec and receive on 9Mbytes/sec without os.

But with the psos, it can only send on 6M/byte and receive on 5.5Mbytes/sec.

 

Why is there a so sharp decrease ? Is it reasonable?

 

Thanks.

 

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