This is an automated email from the git hooks/post-receive script. It was generated because a ref change was pushed to the repository containing the project "GNU Radio block for interfacing with various radio hardware". The branch, master has been updated via 164a09fc11cec2d8b15b38e8b512fa542d6cecc7 (commit) via b206a90f494cf07389d1f24467964afe89f5c111 (commit) via e6f46a1c04f3f6daa48d2a49b00592a6e1f32b5c (commit) via 2b798113503be73d67348dec5ed9f944de6fe7b6 (commit) via d230397957603a026c688dd462d349f8dcb645c8 (commit) from ac15e7897bb740d083c71bf02729467ca6528635 (commit) Those revisions listed above that are new to this repository have not appeared on any other notification email; so we list those revisions in full, below. - Log ----------------------------------------------------------------- http://cgit.osmocom.org/gr-osmosdr/commit/?id=164a09fc11cec2d8b15b38e8b512f… commit 164a09fc11cec2d8b15b38e8b512fa542d6cecc7 Author: Dimitri Stolnikov <horiz0n(a)gmx.net> Date: Sun Feb 28 17:52:01 2016 +0100 airspy: Option pack={0,1} to enable USB bit packing Patch provided by Martin Smith. Last July there were several changes made to the Airspy firmware and libairspy that added support for a new bit packing mode where 4 sets of 12 bit samples are packed into 3 sets of 16 bits for the transfer across the USB bus ( https://i.imgur.com/qXnWoEK.png?1 ). 25% less data is transferred across the bus and this is good for some computers with cheap USB chipsets. There is an overhead of extra memory bandwidth required on the host side to unpack the data into a useful format, so for optimal performance bit packing is disabled by default. The data is automatically unpacked within libairspy before being passed along, so no changes are required anywhere else if packing is enabled (or not enabled). Airspy firmware older than v1.0.0-rc6 does not have the function, but that is detected and handled by libairspy. I wrote the attached patch to enable packing in gr-osmosdr, which I tested and it works. It is basically a clone of the bias=0|1 lines as pack=0|1 and calls the needed libairspy function. ref: https://github.com/airspy/firmware/commit/7e1806b https://github.com/airspy/firmware/commit/5b7dcab https://github.com/airspy/host/commit/a51eccb --- Do some Baseline test with Airspy command line tools to have something to compare USB throughput results -------------------------------------------------------------------------------------------------------- $ sudo mount -t debugfs none /sys/kernel/debug $ sudo modprobe usbmon $ wireshark -i usbmod3 & $ airspy_info ; sleep 120 ; \ airspy_rx -t 4 -r /dev/null -n 2400000000 ; sleep 120 ; \ airspy_rx -t 4 -r /dev/null -p 1 -n 2400000000 ; sleep 120 ; \ airspy_info Wireshark->Statistics->IO Graph The Bytes/Tick are double the actual data rate because of way wireshark collects the USB packets, I could have added a filter to fix this. But the relationship is valid 25% less with packing enabled. The data rate in the IO Grahp drops from 80MB/sec (in+out) [really 40MB/sec] to 60MB/second (in+out) [really 30MB/sec] from unpacked to packed. 10MSPS no packing, packing https://i.imgur.com/pA9LPdE.png?1 2.5MSPS no packing, packing https://i.imgur.com/lA8q5aq.png?1 Verification test with my patched gr-osmosdr -------------------------------------------- $ sudo mount -t debugfs none /sys/kernel/debug $ sudo modprobe usbmon $ wireshark -i usbmod3 & $ osmocom_fft -a "airspy=0" -s 10000000 --fft-rate=1 $ osmocom_fft -a "airspy=0,pack=1" -s 10000000 --fft-rate=1 $ osmocom_fft -a "airspy=0" -s 2500000 --fft-rate=1 $ osmocom_fft -a "airspy=0,pack=1" -s 2500000 --fft-rate=1 $ osmocom_fft -a "airspy=0" -s 2500000 --fft-rate=1 $ osmocom_fft -a "airspy=0,pack=0" -s 2500000 --fft-rate=1 I ran all of the above tests and the wireshark USB throughput graphs showed exactly what was expected. 40MB/sec(10MSPS+normal),30MB/sec(10MSPS+packing),10MB/sec(2.5MSPS +normal),7.5MB/sec(2.5MSPS+packing),10MB/sec(2.5MSPS+normal),10MB/ sec(2.5MSPS+normal). 25% less when packing was enabled and if you did not specify the "pack=1", then no bit packing is performed by libairspy. All the magnitudes within the FFT windows looked exactly the same as they do without bit packing. http://cgit.osmocom.org/gr-osmosdr/commit/?id=b206a90f494cf07389d1f24467964… commit b206a90f494cf07389d1f24467964afe89f5c111 Author: Dimitri Stolnikov <horiz0n(a)gmx.net> Date: Sun Feb 28 17:50:54 2016 +0100 apps: implement --peak-hold option for fft http://cgit.osmocom.org/gr-osmosdr/commit/?id=e6f46a1c04f3f6daa48d2a49b0059… commit e6f46a1c04f3f6daa48d2a49b00592a6e1f32b5c Author: Dimitri Stolnikov <horiz0n(a)gmx.net> Date: Sun Feb 28 17:46:55 2016 +0100 apps: added --clock-source option to fft and siggen http://cgit.osmocom.org/gr-osmosdr/commit/?id=2b798113503be73d67348dec5ed9f… commit 2b798113503be73d67348dec5ed9f944de6fe7b6 Author: Dimitri Stolnikov <horiz0n(a)gmx.net> Date: Sun Feb 28 17:45:54 2016 +0100 bladerf: implement options for clock configuration Since firmware 2016.01-rc1 bladeRF has the ability to lock to an external reference as well as produce arbitrary frequency signal (25 MHz here) on its clock output. Use gr-osmosdr source with the following arguments to produce 25 MHz on the SMB connector: osmocom_fft -a bladerf,smb=25e6 smb=25e6 To lock the bladeRF itself to an external GPSDO reference, use additional arguments tamer=external for 10MHz or tamer=external_1pps for 1PPS GPSDO signals. osmocom_fft -a bladerf,smb=25e6,tamer=external tamer={internal,external_1pps,external} The described method requires https://github.com/Nuand/bladeRF/releases/ tag/2016.01-rc1 Carefully *read the instructions for external reference locking* (especially max allowed voltage levels) on Nuand's blog https:// www.nuand.com/blog/2016-01-rc1-release/ http://cgit.osmocom.org/gr-osmosdr/commit/?id=d230397957603a026c688dd462d34… commit d230397957603a026c688dd462d349f8dcb645c8 Author: Jiří Pinkava <j-pi(a)seznam.cz> Date: Mon Feb 15 14:22:04 2016 +0100 allow both 3.7.* and git version of GnuRadio ----------------------------------------------------------------------- Summary of changes: CMakeLists.txt | 7 +++- apps/osmocom_fft | 9 +++++ apps/osmocom_siggen_base.py | 6 +++ grc/gen_osmosdr_blocks.py | 3 +- lib/airspy/airspy_source_c.cc | 10 +++++ lib/bladerf/bladerf_common.cc | 81 +++++++++++++++++++++++++++++++++++++++++ lib/bladerf/bladerf_common.h | 7 ++++ lib/bladerf/bladerf_sink_c.cc | 15 ++++++++ lib/bladerf/bladerf_sink_c.h | 4 ++ lib/bladerf/bladerf_source_c.cc | 15 ++++++++ lib/bladerf/bladerf_source_c.h | 4 ++ 11 files changed, 159 insertions(+), 2 deletions(-) hooks/post-receive -- GNU Radio block for interfacing with various radio hardware