Hi,
sorry for cross-posting, but this issue really spans both iwl3945 and ath5k.
I have two laptops (acer 5720, and aspire one) and I see some strange speed issues.
I initially blamed iwl3945, then thought it got fixed, but now I have ath5k, and speeds are low
and I suspect that both drivers has bugs regarding to speed.
Walter Francis, once reported similar issue, so I cc'ed him too.
He says that 2.6.25 works fine for iwl3945.
I'll test this, and bisect if necessary.
So here it goes:
System setup:
a wired desktop connected to a router, I call it just router
as wired connection there is 100 Mbits/s and this can't
be the bottleneck.
two laptops, both are close to the router, signal strength is -50 dBm on laptop
and -55 dBm on aspire one (they are really close, they are on same desktop).
Also I did try to bring both laptops to router, and this really didn't help much.
Only one of laptops was on when I did speed tests between a laptop and router.
I did those tests several times, and interleaved them in different order.
For data transfers, contents of /dev/zero were send to /dev/null via TCP connection,
using netcat.
So here are the speeds:
router->iwl3945 = 2.3 Mbytes/s, solid speed, never dropped much, was consistent across tests.
iwl3945->router = 1.0 Mbytes/s max, on first test, it dropped often to 300 Kbytes/s
Then in another test for whole session it stayed at 200 Kbytes/s, it was same upload speed
to ath5k too, the speed varied a lot too.
router->ath5k = 1.4 Mbytes/s max, was pretty solid, also noticed that
iwconfig shows maximum 18M, although my router supports all B/G speeds.
attempts to set higher speed resulted in full connection loss.
also association was dropping often, and that resulted in few minutes of no transfer
at all.
ath5k->router = 1.4 Mbytes/s max, also the same 18 Mbytes/s issue ,
and same association issue.
And now for the worst part:
ath5k->iwl3945 = 800 Kbytes/s, but speed very often dropped to 600 Kbytes/s, and once it did drop to around 80~100 Kbytes/s
I did see same association drops, but they were rare.
iwl3945->ath5k = 500 Kbytes/s and often drops to 300 Mbytes/s.
Best regards,
Maxim Levitsky
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