On Tue, Jul 5, 2011 at 6:13 PM, Marcus D. Leech <mle...@ripnet.com> wrote:
> Relatively simple flow-graph, not complete yet by any stretch of the > imagination. > > It starts out innocuous enough, but really gets going after a while. The > RSS grows by about 150M/minute, the Virtual Size at a somewhat > slower pace. After a few minutes of running, its RSS has grown enough > that it's consuming *most* of the physical memory on the system, > and the kernel is starting to look for solutions to the problem, the > virtual size grows to about 6.2Gbyte on my system before things get > utterly unusable, and I have to go to the console and kill it off. If I > reduce the bandwidth, it grows more slowly, but it still grows, and grows, > and grows, and grows. > > I was even well-behaved in my FFT size--4096 bins, which is a nice even > multiple of the page-size and everything. > > The Gnu Radio memory behaviour is really starting to bug me. A lot. So > much so that I'm contemplating going directly from UHD to my > application (in this case, a multi-channel riometer). I really don't want > to do that. If I had the time to dedicate to it, and the required depth > of knowledge of the scheduler guts, I'd fix it myself, and post patches. > I understand that the memory tricks are stream-performance > "optimizations", but it's rather unoptimal when your system is eaten alive > by stuff that, at least given a superficial glance, should be > fairly innocuous (except, perhaps for the 25Msps bit, which nobody would > argue is "casual" by any measure). > > -- > Marcus Leech > Principal Investigator > Shirleys Bay Radio Astronomy Consortium > http://www.sbrac.org > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > Hi Marcus, What are you using the vector sink for, I can't find anything that unloads it? If you look at the source code, this block continuously calls "push_back" on a STL vector container (element size is the GNURadio vector). So if nothing ever empties it, then it should consume all the memory space....? --Colby
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