To be completely honest, I have never understood the gain to us provided by the COST the single threaded scheduler imposed. I cannot find the service the single thread scheduler provides that cannot be done more easily and with much greater efficiency in the TPB or even before in a simpler worker thread pool thing but I am sure this is my ignorance. Of course, it is easy to criticize when I did not write it and when the author is in the middle of the Atlantic with a torn sail limping home (take it easy, he was 30 nm from the end at 7 this morning)!
Well anyway, we are there now with TPB and that is only going to get better. I would prefer to have enabled and know how to set this in the config file than to have environment variables alone. Bob ARRL SDR Working Group Chair Member: ARRL, AMSAT, AMSAT-DL, TAPR, Packrats, NJQRP, QRP ARCI, QCWA, FRC. "And yes I said, yes I will Yes", Molly Bloom -----Original Message----- From: Johnathan Corgan [mailto:jcor...@corganenterprises.com] Sent: Friday, December 12, 2008 10:49 AM To: Marcus D. Leech Cc: Bob McGwier; GNURadio Discussion List Subject: Re: [Discuss-gnuradio] Upgrade (downgrade?) to a Q6600 CPU On Thu, Dec 11, 2008 at 1:46 PM, Marcus D. Leech <mle...@ripnet.com> wrote: > Also, I looked into the process details of the process running > usrp_ra_receiver.py, and found that it had > 25 threads. That must mean that each block runs in its own thread > now? Yes. The "thread-per-block" design by Eric allows, in many cases, for the flowgraph throughput to rise until an individual block consumes 100% of a single core. This is a great improvement over the single-threaded scheduler that would rate-limit when an entire flowgraph of blocks consumed a single core. You can switch between the two for comparison: $ export GR_SCHEDULER=STS # single-threaded-scheduler (old) $ export GR_SCHEDULER=TPB # thread-per-block (new, default) -Johnathan _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
