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Steve Markgraf steve at steve-m.deHi Robert, On 15.08.19 17:50, Hudspeth, Robert Lee wrote: > I'm trying to run utilities that capture 978 > <https://github.com/mutability/dump978> & 1090Mhz > <https://github.com/mutability/dump1090> traffic simultaneously, but I > can't seem to stop rtl_sdr from allocating too many zero-copy buffers > and preventing both programs from running simultaneously (I'd like to > cut down from 15). I've been through librtlsdr.c and rtl_adsb.c with the > hope of manually changing some variable that will let me accomplish this > to no avail. Just increase the usbfs memory limit, the default is only 16MB. Either write the new size, or completely disable the limit with: echo 0 > /sys/module/usbcore/parameters/usbfs_memory_mb Regards, Steve