A ridiculous observation when running the benchmark_tx.py program!

GNU Radio
1

Hi, all

     When I ran the benchmark program, I input the following two

commands to transmit a data file.

     One is:

     ./benchmark_tx.py -f 170000000

     The other is:

     ./benchmark_tx.py -f 170000000 -S 2



     In fact, by reading the program, I noticed the default value of

samples_per_symbol is 2. So I think by using the argument -S 2, there
should
be no impact on the program execution. But I found that the program
runtime
decreased from about 17s to 5s. Have anyone met this problem before and
told
me the reason for that? I am doing experiments on the performance
analysis
of the GNU Radio and can’t figure out the reason for that.

Thanks a lot

Shucai

2

Can anyone give me some help about the following problem?

Thanks a lot

Shucai

From: discuss-gnuradio-bounces+shucai=removed_email_address@domain.invalid
[mailto:discuss-gnuradio-bounces+shucai=removed_email_address@domain.invalid] On Behalf Of
Shucai
Xiao
Sent: 2008Äê9ÔÂ15ÈÕ 10:17
To: [email protected]
Subject: [Discuss-gnuradio] a ridiculous observation when running
thebenchmark_tx.py program!

Hi, all

     When I ran the benchmark program, I input the following two

commands to transmit a data file.

     One is:

     ./benchmark_tx.py ¨Cf 170000000

     The other is:

     ./benchmark_tx.py ¨Cf 170000000 ¨CS 2



     In fact, by reading the program, I noticed the default value of

samples_per_symbol is 2. So I think by using the argument ¨CS 2, there
should be no impact on the program execution. But I found that the
program
runtime decreased from about 17s to 5s. Have anyone met this problem
before
and told me the reason for that? I am doing experiments on the
performance
analysis of the GNU Radio and can¡¯t figure out the reason for that.

Thanks a lot

Shucai

3

On Mon, Sep 15, 2008 at 7:17 AM, Shucai X. [email protected] wrote:

     When I ran the benchmark program, I input the following two

commands to transmit a data file.

     One is:

     ./benchmark_tx.py –f 170000000

     The other is:

     ./benchmark_tx.py –f 170000000 –S 2

Which example directory are you running in? What is your full command
line?

–
Johnathan C.
Corgan Enterprises LLC
http://corganenterprises.com/

4

The directory I am running in is:
/gnuradio/gnuradio-examples/python/digital
The following are the full command line I am using
1 ./benchmark_tx.py ¨Cf 170000000
2. ./benchmark_tx.py ¨Cf 170000000 -S 2

Thanks a lot

Shucai