On Thu, Oct 21, 2010 at 12:41:16AM -0400, Marcus D. Leech wrote: > I had a flow-graph that earlier today had a latency of roughly 1 second > or so. > > When I tested it this evening, after it had been running for several > hours, the latency was > back up to *several tens of seconds*!!!. Which means that external > events at the source take > several tens of seconds to show up at the sinks -- two graphical, and > one filesink. WTF? !! > > The CPU load at the time was modest -- about 38%
38% of what? How many cores? What kind of machine? It's possible that there's a computation in a single block that requires > 1 core to compute in realtime. Have you tried oprofile to see where the graph is spending its time? Are you i/o bound? What's the rate that you're writing to the file sink? I believe htop will show you all the threads of the process. Are any of them consuming on the order of 100% of a single core? Eric _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio