[lwip-users] [lwip] what speed?

[Michel Julier]

Hello everybody,

I am planning to port lwIP to the Zilog eZ80. This processor is supplied
with a (precompiled) TCP/IP: IPworks from MetroLink, with a unix-like
RTOS called "xinu". All that is big (about 100KB code size for a web
server), and very slow (less than 10KB/s transfer rate on an 8-bit CPU
running at near 20 MIPS and a RTL8019AS 10Mb/s ethernet interface).

I know that lwIP will allow me to gain access to the source (for using
in other projects) and to reduce the memory usage. But will it allow me
to increase the transfer rate over Ethernet? I hoped to transfer near
1MB/s (or at least 500Ko/s) on a 10Mb/s 10-base-T interface. Using
IPworks the speed is 100 times below that, probably because this RTOS is
too heavy for such a slow CPU. Does anyone have ideas about the speed
using lwIP?

By the way, if somebody has a manual on how to program the RTL8019AS
(this is a NE2000-compatible chip with ISA PnP support), it would be
really nice. At Realtek, they give a very short manual, and explain
mostly how to use the Plug-and-Play features, they seem to beleive that
anyone knows how to program a NE2000...

Michel Julier
Montpellier, France
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