Hi Bogdan, On Tue, Apr 10, 2012 at 03:48:11AM -0700, Bogdan Diaconescu wrote: > Hello gnuradio fellows, > > I have an issue that appears in all gnuradio versions I used lately (I > started with 3.3 and last week I updated to latest from git) and I thought I > should post here before allocating the time to look into it by myself. > > I'm modifying a gnuradio block that is connected from python to 6 file > sources. Everything works fine as long as the files I'm using as source for > data are relatively small (30MB). When the files become large I see that the > data received in general_work() function is corrupted. It is not massively > corrupted but enough to screw my work.
I've seen this behaviour, too. My workaround was to use a throttle block after noticing that my code works with USRPs, but not with files. However, I never managed to trace the bug to the file source. Thanks for this! > Investigating the problem, I did a small test with having the 6 files filled > with known patterns and printing an error in the general_work() if what is > received is different. The result is that if I use files with sizes over > 100MB I see 50-80 errors in total. Do you have errors, or are samples missing? > Now, to unblock my work I did observe that if I insert some printing in > general_work() I will not get the errors. Going further, inserting a boost > delay of 100uS also solves the problem. > > some more data: > 1. I know the new blocks should use work() instead of general_work() but is > it still supposed to work as long as I call consume_each(), right? That should work since general_work() calls work() and then consume_each(). Have a look at the code of gr_block (or was it gr_basic_block?) MB -- Karlsruhe Institute of Technology (KIT) Communications Engineering Lab (CEL) Dipl.-Ing. Martin Braun Research Associate Kaiserstraße 12 Building 05.01 76131 Karlsruhe Phone: +49 721 608-43790 Fax: +49 721 608-46071 www.cel.kit.edu KIT -- University of the State of Baden-Württemberg and National Laboratory of the Helmholtz Association
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