Files
integ/base/linuxptp/debian/bullseye/patches/0060-Fix-HA-clock-selection-of-priority-0-source.patch
Andre Mauricio Zelak 1fff0107f2 phc2sys: Downgrade log message about timeout reading pmc dds,
tpd and pds

Depending upon system load, the read pmc call can timeout. When
it happens the corresponding data set is reset, allowing the HA
algorithm to switch over the current source.

Although the read timeout is undesirable, the error message is
misleading because the failure is mitigated. Downgrade the error
message to notice to disable it in the default log level.

Test Plan:
PASS: Deploy T-BC with single PTP4L instance
 - Load system (stress -c 64 -m 5 -t 60)
   check user.log, phc2sys not showing the error message
   phc2sys: notice [1200995.017] phc-inst2 pmc agent index 0, timeout reading pmc tpd

PASS: Deploy T-BC with single PTP4L instance
 - Adjust the log to debug level
 system ptp-instance-parameter-add phc-inst2 logging_level=7
 - Load system (stress -c 64 -m 5 -t 60)
   check user.log, phc2sys eventually shows the error message
   phc2sys: notice [1215208.628] phc-inst2 pmc agent index 0, timeout reading pmc tpd

PASS: Build linuxptp package

Closes-Bug: 2132273

Change-Id: I3e05de4006c0e35b725178d9e56eaf8c72d52747
Signed-off-by: Andre Mauricio Zelak <andre.zelak@windriver.com>
2025-11-25 17:07:25 -03:00

38 lines
1.3 KiB
Diff

From 718853cf344bc6ebc17c06e7a6c82601d8d76365 Mon Sep 17 00:00:00 2001
From: Andre Mauricio Zelak <andre.zelak@windriver.com>
Date: Thu, 10 Oct 2024 16:56:34 -0300
Subject: [PATCH 60/67] Fix HA clock selection of priority 0 source
Fixed behavior where a clock set with ha_priority equal 0
is not select, even when it matches all the requirements.
Closes-bug: 2083981
Test plan: two sources with priority 0
PASS: Verify a clock source is selected active when it starts to match
the requirements and the current active doesn't match them.
PASS: Verify a clock source isn't selected active when it starts to
match the requirements and the current active does too match them.
Signed-off-by: Andre Mauricio Zelak <andre.zelak@windriver.com>
---
phc2sys.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/phc2sys.c b/phc2sys.c
index d89fb23..9e8751f 100644
--- a/phc2sys.c
+++ b/phc2sys.c
@@ -1091,7 +1091,7 @@ static struct clock* ha_select_clock(struct phc2sys_private *priv, struct config
}
/* one or more sources match requirements, select highest priority */
- highest_priority = 0;
+ highest_priority = -1;
LIST_FOREACH(clock, &ha_available_clocks, ha_list) {/* select highest priority clock
more than one clock with same priority, select first
don't select clocks with ha_priority 0 */
--
2.34.1