From: Stephen Hemminger <shemminger@osdl.org>
To: Tino Keitel <tino.keitel@tikei.de>
Cc: netdev@vger.kernel.org
Subject: Re: 2.6.19: very low transmit speed after suspend/resume with Sky2
Date: Sat, 02 Dec 2006 13:16:28 -0800 [thread overview]
Message-ID: <4571ED2C.6040005@osdl.org> (raw)
In-Reply-To: <20061202131833.GA3673@thinkpad.home.local>
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.
next prev parent reply other threads:[~2006-12-02 21:16 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-12-02 9:16 2.6.19: very low transmit speed after suspend/resume with Sky2 Tino Keitel
2006-12-02 13:18 ` Tino Keitel
2006-12-02 21:16 ` Stephen Hemminger [this message]
2006-12-02 22:37 ` Tino Keitel
2006-12-07 10:32 ` Tino Keitel
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