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.
Re-tested with 2.6.18.2 after a suspend/resume cycle:
$ nttcp -l 1500 -n 5000 dose
l 7500000 2.15 0.05 27.9219 1249.9219 5000 2326.83 104160.2
1 7500000 2.20 0.04 27.2441 1499.9250 5178 2351.16 129443.5
$ nttcp -r -l 1500 -n 5000 dose
l 7500000 2.07 0.09 28.9676 681.7794 5182 2501.83 58883.0
1 7500000 1.98 0.03 30.2748 2142.7806 5000 2522.90 178565.1
lspci output:
01:00.0 Ethernet controller: Marvell Technology Group Ltd. 88E8053
PCI-E Gigabit Ethernet Controller (rev 22)
Any hints what I could try to get the full performance in 2.6.19?
Regards,
Tino
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