Change in osmo-bts[master]: osmo-bts-trx: Change default for clock_advance to 3

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daniel gerrit-no-reply at lists.osmocom.org
Thu Apr 9 16:14:58 UTC 2020


daniel has uploaded this change for review. ( https://gerrit.osmocom.org/c/osmo-bts/+/17766 )


Change subject: osmo-bts-trx: Change default for clock_advance to 3
......................................................................

osmo-bts-trx: Change default for clock_advance to 3

osmotrx fn-advance (which is the clock_advance variable here) and
osmotrx rtx-advance together make up the minimum delay the BTS can react
to a channel request, etc.

The default of 25 are around 115ms which is clearly too much. With
modern hardware and using SCHED_RR a lower value should not be an issue.

Fixes: OS#4487
Fixes: SYS#4885
Change-Id: I7da3d0948f38e12342fb714b29f8edc5e9d0933d
Related: SYS#4881
---
M src/osmo-bts-trx/main.c
1 file changed, 1 insertion(+), 1 deletion(-)



  git pull ssh://gerrit.osmocom.org:29418/osmo-bts refs/changes/66/17766/1

diff --git a/src/osmo-bts-trx/main.c b/src/osmo-bts-trx/main.c
index ab0472e..7e71236 100644
--- a/src/osmo-bts-trx/main.c
+++ b/src/osmo-bts-trx/main.c
@@ -134,7 +134,7 @@
 	plink->u.osmotrx.remote_ip = talloc_strdup(plink, "127.0.0.1");
 	plink->u.osmotrx.base_port_local = 5800;
 	plink->u.osmotrx.base_port_remote = 5700;
-	plink->u.osmotrx.clock_advance = 20;
+	plink->u.osmotrx.clock_advance = 3;
 	plink->u.osmotrx.rts_advance = 5;
 	/* attempt use newest TRXD version by default: */
 	plink->u.osmotrx.trxd_hdr_ver_max = TRX_DATA_FORMAT_VER;

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Gerrit-Project: osmo-bts
Gerrit-Branch: master
Gerrit-Change-Id: I7da3d0948f38e12342fb714b29f8edc5e9d0933d
Gerrit-Change-Number: 17766
Gerrit-PatchSet: 1
Gerrit-Owner: daniel <dwillmann at sysmocom.de>
Gerrit-MessageType: newchange
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