Tino Keitel wrote:
On Sat, Dec 02, 2006 at 10:16:28 +0100, Tino Keitel wrote:
Hi folks,
since 2.6.19 I have the problem that I get lousy transmit speeds of < 1
mbit/s.
Here is a quick test, the 5th column is the transfer speed in mbit/s:
From the affected machine to my laptop over WLAN (the affected machine
is connected to a Fast Ethernet switch):
$ nttcp -r -l 1400 -n 500 dose
l 700000 8.16 0.04 0.6867 155.5469 824 101.04 22887.6
1 700000 8.15 0.00 0.6873 560000.0000 500 61.37 50000000.0
Only 0,68 mbit/s during transmit. :-(
From my laptop to the affected machine:
$ nttcp -l 1400 -n 5000 dose
l 7000000 2.21 0.03 25.3427 1999.8572 5000 2262.74 178558.7
1 7000000 2.25 0.07 24.8363 823.4810 9268 4110.41 136286.1
This is ok, 25 mbit/s during receive, limited by the WLAN in the
laptop.
After reboot:
$ nttcp -l 1400 -n 5000 dose
l 7000000 2.04 0.03 27.5005 1749.8906 5000 2455.40 156240.2
1 7000000 2.08 0.06 26.9843 999.9464 9455 4556.00 168830.2
Now I got 27 mbit/s during receive, that's ok for WLAN.
Sorry, I should give the number for _transmit_ here. This was ok, too.
Regards,
Tino
Most likely, the problem is similar to one I am working. The
device_resume code gets run before
BIOS. And the BIOS wakeup screws up the device. The proper fix will
happen in 2.6.20.
If you are using MSI, turn that off.
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