Itai Nahshon <[EMAIL PROTECTED]> writes:
> Transferring files using ftp worked fine (most of the times). Transfer rate
> was 7.5-8 Kb/sec. That's OK for a 115.2 KB connection (I assume IrLAN
> has more overhead than PPP)
Well, that depends. PPP uses 8 bytes of header/trailer and IrLAN uses 14
bytes (Ethernet) which you might notice at low speeds. However if you run
at 4Mbps then the HDLC, CRC of PPP will give you _much_ worse service than
IrLAN. I can get over 340Kbytes/s using IrLAN, but PPP over IrCOMM has
never got itself over 250 Kbytes/s.
> but I would expect alittle more if compression
> is used. I had irda_deflate.o loaded from the beginning but I did not see
> a use count on it. Des compression need a special tweak to be effective?
Compression should work for 2.2 kernels, but not for 2.3 kernels. You need
to load the compression module on both machines before trying to connect.
Compression is not a part of the IrDA standard and is in fact on its way
out of the Linux IrLAP layer. I might add it above the TTP layer, but time
will tell.
> Ping time was very inconsistent. Between 90 and 600 msec. That's not
> a problem for file transfer but very bad if I want to telnet or to start an
> X connection. Is there a place for tuning the packet scheduling to
> minimize the ping time?
Have you enabled "Fast RR's" when you configured your kernel? I get less
than 50 ms using SIR speeds.
> Trying more than one activity on the connection did not work that well.
> Ping while transferring a file got errors (lots of messages about wrong
> data in byte #8). I also tried to run 2 ftp sessions (each computer gets
> a large file from the other computer). The IrLAN connection went down after
> some unexpected errors (happened after about 2MB).
Thats strange. I can run IrLAN for weeks without any problems. Could you
mail me your exact setup? I need to know kernel version, kernel config, did
you run Linux on both machines etc.
-- Dag
--
/ Dag Brattli | The Linux-IrDA Project /
// University of Tromsoe, Norway | Infrared communication for Linux //
/// http://www.cs.uit.no/~dagb | http://www.cs.uit.no/linux-irda/ ///
_______________________________________________
Linux-IrDA mailing list - [EMAIL PROTECTED]
http://www4.pasta.cs.UiT.No/mailman/listinfo/linux-irda
