Hi Tom, Johnathan,
Thanks your reply.
Hi Marcus,
Seems your conclusion is make sense.
I think it might relate with buffer size which was allocated in
"flat_flowgraph.cc / allocate_buffer"
// *2 because we're now only filling them 1/2 way in order to
// increase the available parallelism when using the TPB scheduler.
// (We're double buffering, where we used to single buffer)
int nitems = s_fixed_buffer_size * 2 / item_size
But I don't know why do it can increase parallelism?
在 2015年06月19日 22:48, Johnathan Corgan 写道:
On Fri, Jun 19, 2015 at 6:09 AM, Tom Rondeau <[email protected]
<mailto:[email protected]>> wrote:
On Thu, Jun 18, 2015 at 8:29 AM, Tiankun Hu
<[email protected] <mailto:[email protected]>> wrote:
Hi Tom,
Thanks your reply, I have another question, in function
"min_available_space" why buffer_size/2 is best ?
I'm not really sure. That's a question for Eric.
The scheduler aims to keep the buffer no more than half full, so that
in the steady state the producing block can write into the free half
and the downstream consuming block(s) read from the filled half.
--
Johnathan Corgan
Corgan Labs - SDR Training and Development Services
Intro to SDR Class - June 29-30, El Segundo, CA
http://corganlabs.com
--
Thanks
Tiankun
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