[srslte-users] Debug build and LV_HAVE_SSE and LV_HAVE_AVX

[J Giovatto]

Hi,

I was running a Debug build to bring in debug symbols for a crash I was
seeing.

To make a long story short I was not able to make a connection between
the ue and enb when using n_prb 6 or 15, while 25 did work.

The only thing I've noticed so far is this in ...

"lib/src/phy/fec/rm_turbo.c"

#ifdef DEBUG_MODE
#warning FIXME: Disabling SSE/AVX turbo rate matching
#undef LV_HAVE_SSE
#undef LV_HAVE_AVX
#endif

One caveat here is that I'm an running with a faux_rf (no hardware)
meaning the calls to the rf_device for send/recv are actually a call to
a unix socket send/recv, so

the samples in should be exactly the same as samples in almost all cases
with the exception of a few timing hiccups at a 1msec TTI, so I kind of
expected that

if n_prb 25 worked, 6 or 15 would be supported with even less processing
overhead.

I have NOT tried the same on real hardware so cant say for sure.

Anyway here is a portion of the ue log...

4:11:13.241316 [MAC ] [I] [10235] SCHED: Searching for DL grant for
SI-RNTI window_st=0, window_len=20
14:11:13.242349 [MAC ] [I] [10236] SCHED: Searching for DL grant for
SI-RNTI window_st=0, window_len=20
14:11:13.243398 [MAC ] [I] [10237] SCHED: Searching for DL grant for
SI-RNTI window_st=0, window_len=20
14:11:13.246231 [MAC ] [I] [00000] BSR:   QUEUE status: 0 (0), 0 (0), 0
(0), 0 (0), 0 (0), 0 (0),
14:11:13.255872 [MAC ] [I] [00009] SCHED: Searching for DL grant for
SI-RNTI window_st=160, window_len=20
14:11:13.405340 [RRC ] [I] RRC Cell Selecting: timeout expired. Starting
Cell Search...
14:11:13.405373 [PHY0] [W] [00161] SYNC:  Can't start cell search
procedure while camping on cell
14:11:13.415759 [MAC ] [I] [00169] SCHED: Searching for DL grant for
SI-RNTI window_st=320, window_len=20
14:11:13.575418 [MAC ] [I] [00329] SCHED: Searching for DL grant for
SI-RNTI window_st=480, window_len=20
14:11:13.735650 [MAC ] [I] [00489] SCHED: Searching for DL grant for
SI-RNTI window_st=640, window_len=20
14:11:13.747209 [MAC ] [I] [00501] BSR:   QUEUE status: 0 (0), 0 (0), 0
(0), 0 (0), 0 (0), 0 (0),
14:11:13.895623 [MAC ] [I] [00649] SCHED: Searching for DL grant for
SI-RNTI window_st=800, window_len=20

I tried to remove the above check but got a build error

/lib/src/phy/fec/rm_turbo.c:373:19: error: selector must be an integer
constant in the range 0..7
           int16_t x  = (int16_t)  _mm_extract_epi16(xVal,   j);
                   ^
so there is more of a difference in a Debug vs Release build that I
figured might be worth mentioning.

In Release builds I am able to connect using n_pbr 6,15,25 and 50.

Regards

Joe