[PATCH] osmo-bts[master]: scheduler.c: Print message when burst substitution happens

[Harald Welte]

Review at  https://gerrit.osmocom.org/6870

scheduler.c: Print message when burst substitution happens

Whenever we receive discontinuous frame numbers from the TRX socket,
osmo-bts-trx is substituting zero-filled bursts for those frame numbers
which we missed.  Don't just do this silently, but actually log about
it, as it is an error.

Note: This [currently] happens when using a virtual air interface with trxcon
as opposed to a real SDR receiver with osmo-trx.

Change-Id: If79eab37c80647c9ab64f399fa4676d97af3e9ad
---
M src/common/scheduler.c
1 file changed, 4 insertions(+), 1 deletion(-)


  git pull ssh://gerrit.osmocom.org:29418/osmo-bts refs/changes/70/6870/1

diff --git a/src/common/scheduler.c b/src/common/scheduler.c
index 4e48160..e6e7eaf 100644
--- a/src/common/scheduler.c
+++ b/src/common/scheduler.c
@@ -1725,8 +1725,11 @@
 			func(l1t, tn, fn, chan, bid, bits, nbits, rssi, toa);
 		} else if (chan != TRXC_RACH && !l1cs->ho_rach_detect) {
 			sbit_t spare[GSM_BURST_LEN];
-
 			memset(spare, 0, GSM_BURST_LEN);
+			/* We missed a couple of frame numbers (system overload?) and are now
+			 * substituting some zero-filled bursts for those bursts we missed */
+			LOGPFN(DL1P, LOGL_ERROR, fn, "Substituting all-zero burst (current_fn=%u, "
+				"elapsed=%u\n", current_fn, elapsed);
 			func(l1t, tn, fn, chan, bid, spare, GSM_BURST_LEN, -128, 0);
 		}
 

-- 
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Gerrit-MessageType: newchange
Gerrit-Change-Id: If79eab37c80647c9ab64f399fa4676d97af3e9ad
Gerrit-PatchSet: 1
Gerrit-Project: osmo-bts
Gerrit-Branch: master
Gerrit-Owner: Harald Welte <laforge at gnumonks.org>