RE: [Discuss-gnuradio] Unexplained out-of-sequence packets...

[Ian Holland]

Hi Eric

It seems this has not fixed the problem. Does anyone have any other
suggestions as to the possible cause? Note, I also found power cycling
the USRP2 can sometimes avoid the same problem.

Ian.

 

-----Original Message-----
From: address@hidden
[mailto:address@hidden On
Behalf Of Ian Holland
Sent: Tuesday, 11 May 2010 11:14 AM
To: Eric Blossom
Cc: address@hidden
Subject: RE: [Discuss-gnuradio] Unexplained out-of-sequence packets...

Thanks Eric

I checked the power management preferences and couldn't see anything
about CPU throttling, though I did verify it would never go to sleep
after inactivity. Then, I found some info on
http://blog.mpathirage.com/2009/10/04/how-to-disable-dynamic-frequency-s
calingcpu-throttling-in-ubuntu-jaunty9-04/ to disable the CPU throttling
(I know I am using 9.10, not 9.04, but I imagine it should be the same).

After rebooting (only once), I haven't yet seen the problem again.
Unfortunately, given the seemingly random nature of the problem, I guess
it is a wait-and-see matter as to whether it ever does resurface.

Cheers

Ian.


-----Original Message-----
From: Eric Blossom [mailto:address@hidden 
Sent: Tuesday, 11 May 2010 10:55 AM
To: Ian Holland
Cc: address@hidden
Subject: Re: [Discuss-gnuradio] Unexplained out-of-sequence packets...

On Tue, May 11, 2010 at 10:45:05AM +0930, Ian Holland wrote:
> Not sure if this sheds any more light on the issue, but I have found
> that if I shut down the PC and turn it on again, before retrying the
> same tests, the problem disappears. However, as I have encountered it
> before as well I am still puzzled as to why this should ever occur.
> 
> Ian.

CPU throttling.  Check power management configuration.

Eric

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