msvc6 port is sloooooowI have tested LWIP wth win pcap on window2000 and its
giving me more than 40Mbps both Tx and Rx, but i have created my own socket
layer and my own thread safe mechanism usning Raw API. With some minor tuning
one can achieve very high thruputs with lwip for sure.
Regards
----- Original Message -----
From: Goldschmidt Simon
To: [email protected]
Sent: Friday, March 09, 2007 12:39 AM
Subject: [lwip-users] msvc6 port is sloooooow
Hi all,
I've been recently working getting the mscv6 port to work so that I can
tryout patches at home where I have no embedded hardware to test.
Getting the current code to run was not that hard. I have added an OS layer
to be able to test socket api based applications.
I have implemented a TCP server test which waits for a client to send some
test parameters. After receiving the parameters (mainly number of packets to
send), the server sends X 'packets' with 1460 bytes data each (with 'packets' I
mean it calls lwip_send X times with 1460 bytes each time).
Now, I have the following question: On my embedded system (altera NIOS
running at 60 MHz), I achieve lwIP send rate of about 2MByte/s. However, on my
PC (1.3 GHz Windows XP SP2), I only get ~4-8 packets per second!!! (While
processor is always around 100%)
And no, the socket interface it not the bottleneck here. I've had a look at
the processor consumation of each thread: tcpip_thread is the highest with
about 60 %, then comes the input thread (winpcap->pbufs) with about 40%, after
that the socket thread with nearly 0% (it does not do really much for a 1.3 GHz
PC, anyway...)
Does anyone have experience with the winpcap network driver? Did I make some
mistake here? Or is there any problem with that XP service pack network
limitations I heard of somewhere?
Simon
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