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[bbond007]

I have done some tests with various A1200 networking options and here are the results:

Hardware:

A1200 Ver 1D4
DCE Blizzard 1260 80MB RAM
Subway USB
SMC EZ Connect USB Fast Ethernet Adapter
Linksys WPC11 V3 Prism 2.5 PCMCIA 802.11b Wifi Adapter
Dlink DFE-670 10/100 PCMCIA Network Adapter
Netgear WNCE2001 universal RJ45 to WiFI adapter
Netgear XET104 Powerline ethernet port with 4 port switch(up to 85MB)

USB
GET / PUT (KBPS)
131.45 / 124.05 (XET104)
104.73 / 78.21 (WNCE2001)

WPC11
329.83 / 273.55

DFE-670
468.55 / 334.16 (XET104)
373.05 / 332.29 (WNCE2001)

Tests were performed on :
- OS 3.1
- MiamiDX stack
- MiamiFTP
- SimpleFTP (server/windows)
- Resolution 1024x768 HGFX 4BPP@16 Colors
- 64MB test file
- RAM:

[amyren]

Thanks for the test data.

By using capital letters KBPS you mean kilobytes (kBps) per seconds and not kilobits (kbps), right?

Normally network speeds specs are given in Mbps (megabit per second), so in your case the fastest rate would equal 3.66 Mbps and the slowest 0.6 Mbps.

The biggest bottleneck here seemes to be the USB option. From wikipedia even USB 1.0 lowspeed mode should manage 1.5 Mbps. But maybe the combination of the subway/SMC EZ/WNCE2001 is the problem.
It would be interesting to know what causes this slowdown.
Have you tested the Subway USB/SMC EZ with ethernet cable direct to your windows server og via your router?
If its still very slow, test the subway for USB transfer speeds (direct to a usb storage).
Then test the SMC EZ itself on another computer (windows/mac), just to see if the amiga drivers could be the problem.

[Zac67]

USB adapters are very prone to stalling in certain conditions. When a network packet is received by the adapter it's buffered locally, then the host needs to poll the adapter to find out there's data to collect. The data is read over a - supposedly - slow bus (don't think clockport offers any significant throughput) which empties the buffer and enables the next packet to be buffered. A larger buffer (=better, more expensive adapter design) provides for receiving packets while transferring previous ones to the host, but there's only so much you can do.

Even with a much faster USB 2.0 host adapter on a modern machine it's hard to reach Fast Ethernet limits, let alone Gigabit - there's simply too much overhead and all the latencies add up. Plus, USB doesn't really help missing overlapped I/O, decent interrupts, etc.

I remember my experiments with a Fast Ethernet ISA(!) card many years ago: it simply had no point.

A native Zorro II card (or Z III - I'm dreaming) should be able to get somewhat higher speeds by lowering the overhead and increasing bus speed. However, to get near-maximum throughputs you need to give your NIC direct memory access on a low-latency no-hassle basis (like PCI or PCIe).

[bbond007]

Originally Posted by amyren

The biggest bottleneck here seemes to be the USB option. From wikipedia even USB 1.0 lowspeed mode should manage 1.5 Mbps. But maybe the combination of the subway/SMC EZ/WNCE2001 is the problem.
It would be interesting to know what causes this slowdown.
Have you tested the Subway USB/SMC EZ with ethernet cable direct to your windows server og via your router?C
If its still very slow, test the subway for USB transfer speeds (direct to a usb storage).
Then test the SMC EZ itself on another computer (windows/mac), just to see if the amiga drivers could be the problem.

USB mass storage on subway only goes 250k/sec max. Even though subway supports USB 2.0 protocol standard, it can't achieve even 1.0 speeds over the clock port. I doubt other USB adapters would do much better.

I could run the test with a long Ethernet cable and eliminate the power line adapter but the computer running the FTP server is also on a power line adapter. I only have one extra long cable,