Thanks, Jeff! I did your experiment and figured out that the setKnobs I do to test for settability hits the throttle and apparently resets it, even if there is no change. I added an additional command line argument to tell the script whether to check settability and then only do that the first time I execute the script.
Mark. May the source be with you! -----Original Message----- From: Discuss-gnuradio [mailto:discuss-gnuradio-bounces+mark.w.christiansen=l3t....@gnu.org] On Behalf Of Jeff Long Sent: Saturday, March 3, 2018 4:29 PM To: discuss-gnuradio@gnu.org Subject: [EXT] Re: [Discuss-gnuradio] control port problem with incorrect throttle rate I don't see any obvious reason this would happen, but maybe the flowgraph glitches each time you connect and that does something to the throttle's algorithm. Try changing your program so it connects once, then iterates over the knobs in a loop with a 1-sec sleep. That will tell you whether which part of the program is causing this behavior. On 03/03/2018 02:22 PM, Christiansen, Mark W. @ CSG - CSW wrote: > I would like some help sorting out a problem I have with control port. > I have a python script that runs every second to gather the current > status of control port variables. It looks like that causes the > flow-graph to speed up somewhat. I set up a simple flow-graph to test it. > > signal_source -> throttle -> probe_rate > > I have the throttle set to 32k. If I don't probe with my python > script, the probe rate settles in close to 32k on control port monitor window. > If I do have my python script running every second, then it averages > about 34k but bouncing around from 33 to 35k on control port monitor > window. I included my python script below. > > Thanks. > > Mark. > > "Simplicity is prerequisite for reliability." > > ~ Edsger W. Dijkstra > > ----------------------------------------- > > #!/usr/bin/python > > # -*- coding: utf-8 -*- > > import sys, os, time, struct > > class MyApp(object): > > def __init__(self, args): > > from gnuradio.ctrlport.GNURadioControlPortClient import > GNURadioControlPortClient > > program = sys.argv[0] > > hostIP = sys.argv[1] > > hostPort = sys.argv[2] > > fileName = sys.argv[3] > > GNURadioControlPortClient([program, hostIP, hostPort], > 'thrift', self.store_radioclient) > > knobs_dict = self.radioclient.getKnobs([]) > > f = open(fileName, 'w') > > for prop in knobs_dict: > > try: > > > self.radioclient.setKnobs(self.radioclient.getKnobs([prop])) > > settable = True; > > except: > > settable = False; > > print >> f, prop, '#', settable , '#', > str(knobs_dict[prop].value) > > # print prop, ' has value ', str(knobs_dict[prop].value) > > f.close() > > def store_radioclient(self, client): > > self.radioclient = client; > > # print '"',self.radioclient,'"' > > if __name__ == '__main__': > > MyApp(sys.argv) > > CONFIDENTIALITY NOTICE: This email and any attachments are for the > sole use of the intended recipient and may contain material that is > proprietary, confidential, privileged or otherwise legally protected > or restricted under applicable government laws. Any review, > disclosure, distributing or other use without expressed permission of > the sender is strictly prohibited. If you are not the intended > recipient, please contact the sender and delete all copies without > reading, printing, or saving. > Beginning April 1, 2018, L3 Technologies, Inc. will discontinue the > use of all @L-3Com.com email addresses. To ensure delivery of your > messages to this recipient, please update your records to > usemark.w.christian...@l3t.com. > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio Beginning April 1, 2018, L3 Technologies, Inc. will discontinue the use of all @L-3Com.com email addresses. To ensure delivery of your messages to this recipient, please update your records to use mark.w.christian...@l3t.com. _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
