While I would not expect sleep to fail consistently, it *can* return a non zero value when not sleeping for the entire time.
Try checking the return value for success. Its not likely this is the cause if it happens every time, but error checking is your friend :) -----Original Message----- From: USRP-users <usrp-users-boun...@lists.ettus.com> On Behalf Of Fabian Schwartau via USRP-users Sent: Tuesday, April 23, 2019 9:47 AM To: usrp-users <usrp-users@lists.ettus.com> Subject: [USRP-users] USRPs time wrong by factor of two *** WARNING *** EXTERNAL EMAIL -- This message originates from outside our organization. Hi everyone, I just found a very strage bug and would like to confirm that this is a bug and if someone can explain/fix this. I read the time from the USRP using get_time_now() and do a lot of stuff with it. Mainly to time commands like frequency hopping and starting of streams. I noticed that the time in the USRP seemed to run slower than expected, actually by a factor of two. Please find a program attached that demonstrates this effect. It prints the internal USRP time roughly every second (using sleep) but the USRP time increments only by 0.5 seconds in each step. What is going on? The program can be compiled using: g++ -std=c++14 -O2 main.cpp -luhd -lboost_system -o main I am using a single (or multiple - does not have an effect) X310 with two TwinRX. UHD is "linux; GNU C++ version 5.5.0 20171010; Boost_105800; UHD_3.15.0.git-89-gf93c5227" from yesterday. FPGA image is also from yesterday using the download script - where can I find the version number? I am running an up-to-date Ubuntu 16.04. -- -------------------------------------------------- M.-Sc. Fabian Schwartau Technische Universität Braunschweig Institut für Hochfrequenztechnik Schleinitzstr. 22 38106 Braunschweig Germany Tel.: +49-(0)531-391-2017 Fax: +49-(0)531-391-2045 Email: fabian.schwar...@ihf.tu-bs.de WWW: http://www.tu-braunschweig.de/ihf -------------------------------------------------- _______________________________________________ USRP-users mailing list USRP-users@lists.ettus.com http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
