Hi! Marcus,
The sample rate is 4MHz. I also tried 1MHz and 10MHz. On my laptop, the
frequency of 'O' is related with sampling rate and is quite common. On the
desktop, I always have to wait quite a while before an 'O' is printed. But
it is printed even when the sampling rate is 200kHz.
Following
Modern disk subsystems can easily sustain 80MB or more per second
even on relativley wimpy hardware
What is the sample rate involved
here? Seriously, I've been able to stream multi-MHz of bandwidth to disk
for long periods without any 'O' happening.
-Marcus
On Fri, 24 Feb
2012 11:23:05 -0
I tried the code without write(), and it still has the problem. But it
seems to be less frequent. I will try your method. Thank you!
> You are writing to a file in a blocking thread, its not the CPU it's
> the hard drive. You should try the program without the write. Then if
> it is the problem yo
You are writing to a file in a blocking thread, its not the CPU it's
the hard drive. You should try the program without the write. Then if
it is the problem you should write out to a file on a ram disk then
save it to a real disk later.
2012/2/24 Wu Ting :
> Hi! Thank you for your suggestions!
>
>
Hi! Thank you for your suggestions!
I realized it is a problem related with computer speed. Today I used a
laptop to run the same code, and 'O' is printed much more frequently.
However, the computer I'm using is a quite good one. It has intel i7
3.4GHz 8-core, and when the code is running, CPU is
2012/2/23 Wu Ting
> Hi! Thank you for your response. I've kept working on this problem for two
> days, but still cannot find a way to solve it.
>
> I simplified the program and have determined that the 'O' is produced is
> this while loop:
>
> while msgCount<1:
>msg = tb.queue.delete_head
it happens? Any
suggestions
> will be greatly appreciated.
>
> Wu
>
> -----Original Message-
> From: Andrew Davis [mailto:glneolistm...@gmail.com]
> Sent: 2012年2月23日 0:15
> To: Wu Ting; discuss-gnuradio@gnu.org
> Subject: Re: [Discuss-gnuradio] Strange output of &quo
or at least catch this error when it happens? Any suggestions
will be greatly appreciated.
Wu
-Original Message-
From: Andrew Davis [mailto:glneolistm...@gmail.com]
Sent: 2012年2月23日 0:15
To: Wu Ting; discuss-gnuradio@gnu.org
Subject: Re: [Discuss-gnuradio] Strange output of "0&qu
io-bounces+wu.ting=comf5.comm.eng.osaka-u.ac...@gnu.org]
> On Behalf Of Wu Ting
> Sent: 2012年2月22日 14:48
> To: discuss-gnuradio@gnu.org
> Subject: [Discuss-gnuradio] Strange output of "0" at the terminal
>
>
>
> Hi all,
>
>
>
> I’m now using message_sink a
.comm.eng.osaka-u.ac...@gnu.or
g] On Behalf Of Wu Ting
Sent: 2012年2月22日 14:48
To: discuss-gnuradio@gnu.org
Subject: [Discuss-gnuradio] Strange output of "0" at the terminal
Hi all,
I’m now using message_sink and msg_queue to receive data from USRP. I do
some calculation for all the d
Hi all,
I'm now using message_sink and msg_queue to receive data from USRP. I do
some calculation for all the data in the msg_queue one by one and write some
of them into a file. Everything seems to be working smoothly. But once in a
while, a "0" is printed in the terminal. (There is no code to
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