before epoll can handle signals, the calling thread needs to block
them. the blocking needs to happen before any other threads get
spawned so they inherit the mask.
the Tx SDU has been set to 128 PDUs because this gives approx.
150kByte UL buffer state (max value for Rel 8 BSR).
Previously, however, we've always reported too much pending UL
data because we weren't subtracting the transmitted data from
the reported data.
with this newer BSR reporting, however, even with full buffers we would
never report full buffers because the queues size is too short.
This seems to cause issues for iperf TCP sessions not resulting
in full DL rate, see isse #1703. It seems that the TCP bandwitdh
probing works better with larger buffers (in our case this can
only be achieved with more PDUs in the pool).
This should fix#1703
this patch refactors the MAC PDU class, the main changes are:
* add to_string() method to pretty print PDU and subheaders
This allows to have a single log entry per MAC PDU with all its
contents.
It removes the C-style fprint() method
* Simplity payload vs. w_payload_ce
Before we've used payload when reading the PDU and w_payload_ce
as a buffer when writing. In all getters we needed to differentiate
between both. Now payload points to w_payload_ce initially and is
only updated when parsing a new PDU.
* add various helpers, e.g. to get subheader index, update a BSR, ..
* fix PDU test to use new to_string() method
simplify logic to check whether a BSR fits and, if so, which type.
before the check has been done in two places.
we now also accomodate for the CE subheader size.
with the B210 and 2 RF ports, i.e. MIMO mode, we have stopped the
Rx stream after changing the rx_samp_rate but didn't start it again.
Either the issue doesn't exist in SISO mode or we never saw it but for MIMO
it can be reproduced easily with rate changes during streaming, i.e.:
$ ./lib/src/radio/test/benchmark_radio -p 2 -t 10 -x -y -s 23.04e6
Instantiating objects and allocating memory...
Initialising instances...
Opening 2 channels in RF device= with args=default
[INFO] [UHD] linux; GNU C++ version 9.2.1 20200304; Boost_107100; UHD_3.15.0.0-2build5
[INFO] [LOGGING] Fastpath logging disabled at runtime.
Opening USRP channels=2, args: type=b200,master_clock_rate=23.04e6
[INFO] [B200] Detected Device: B210
[INFO] [B200] Operating over USB 3.
[INFO] [B200] Initialize CODEC control...
[INFO] [B200] Initialize Radio control...
[INFO] [B200] Performing register loopback test...
[INFO] [B200] Register loopback test passed
[INFO] [B200] Performing register loopback test...
[INFO] [B200] Register loopback test passed
[INFO] [B200] Asking for clock rate 23.040000 MHz...
[INFO] [B200] Actually got clock rate 23.040000 MHz.
[INFO] [MULTI_USRP] 1) catch time transition at pps edge
[INFO] [MULTI_USRP] 2) set times next pps (synchronously)
Warning: TX gain was not set. Using open-loop power control (not working properly)
Setting manual TX/RX offset to 0 samples
Start capturing 10000 frames of 23040 samples...
Changing sampling rate to 23.04 Msamps/s
Setting manual TX/RX offset to 0 samples
Changing sampling rate to 1.92 Msamps/s
Setting manual TX/RX offset to 0 samples
/home/anpu/src/srsLTE/lib/src/phy/rf/rf_uhd_imp.cc.1211: Error timed out while receiving samples from UHD.
/home/anpu/src/srsLTE/lib/src/phy/rf/rf_uhd_imp.cc.1211: Error timed out while receiving samples from UHD.
/home/anpu/src/srsLTE/lib/src/phy/rf/rf_uhd_imp.cc.1211: Error timed out while receiving samples from UHD.
/home/anpu/src/srsLTE/lib/src/phy/rf/rf_uhd_imp.cc.1211: Error timed out while receiving samples from UHD.
/home/anpu/src/srsLTE/lib/src/phy/rf/rf_uhd_imp.cc.1211: Error timed out while receiving samples from UHD.
faluco
Xavier Arteaga
Andre Puschmann
faluco
yagoda
Ismael Gomez
Pedro Alvarez
Francisco Paisana