Re: [Discuss-gnuradio] Speed test went wrong.

[Marcus Müller]

Hi Booth,

the throttle block is an "average rate" limiter, not a measurement block
- it simply pauses copying the input to the output if your sample
generation is faster on long-term average than set in the throttle rate.

So, if you set a throttle rate that is higher than what your PC can do,
the Throttle will just not pause and copy in- to output. It does
nothing. (Ok, it wastes CPU time and memory bandwidth...).

What you want is the "probe rate" block connected to a "message debug"
block, for an easy assessment.

PS: Don't subscribe using Nabble (this is not a forum, but an email
list), but simlpy directly via
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio using your email
address. It works much better and is easier to use. Nabble tends to not
correctly represent discussions.


Best regards,

Marcus


On 25.04.2017 12:18, Booth wrote:
> Dear all,
>  I wondered what would be the maximum sample rate that my PC can handle for
> a basic psk mod-demod. I have used the “prbs_test.grc” from gr-mapper as it
> contains all the necessary blocks. I changed the sample rate for the
> throttle to 32k, 320k,10M, 100M even 10G but the system did not break down.
> I repeated the experiment using different examples but the result was the
> same.
> What went wrong and do you know any appropriate projects for speed
> measurements.
>
>
>
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