Re: Hierarchical blocks in a flowgraph

[Jeff Long]

[replying back on the list]

Make sure the audio sources have "allow blocking" set to "yes", and the sinks to "no". Something in each flow has to control the sample rate.

I can't tell what the null -> freq -> null part of your top level flow does, but a stream with no throttle or hardware blocks can use up a lot of processor and make the system unresponsive.

My guess is that your processor is so busy doing nothing at a high rate that it doesn't have time to respond to the UI.

On Mon, Jan 18, 2021 at 7:54 PM Elmore Family <wa4ywm@comcast.net> wrote:

Jeff,

 

Thanks for getting back to me.

 

Attached are the 3 flowgraphs.

 

Jim

 

From: Jeff Long

Sent: Monday, January 18, 2021 5:42 PM

To: GNURadio Discussion List

Subject: Re: Hierarchical blocks in a flowgraph

 

Hard to tell without seeing the flowgraph. Do you need a throttle?

 

On Mon, Jan 18, 2021 at 4:31 PM Elmore's <wa4ywm@comcast.net> wrote:

I have created a flowgraph which includes 2 hierarchical blocks which I created myself.

 

The entire flowgraph is a transceiver. The hierarchical blocks are a receiver and transmitter.

 

When I tested the hierarchical blocks separately, they function correctly. However, when I enable both in the top flowgraph, the flowgraph executes extremely slowly. It does not respond to clicks until perhaps as much as 30 seconds later.

 

I tried taking one of the hierarchical blocks to the most basic level possible by simply using a Null Source and Sink. I still get the hang-up.

 

Is there something I am not doing in the flowgraph to enable it to run with 2 blocks? Is there some sort of configuration I need to perform to get it to run?

 

I have looked all over forums and in the docs but can’t find anything to solve my problem.

 

Thanks for any help.

 

Jim

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