From: Miroslav Lichvar <mlichvar@redhat.com>
Date: Thu, 2 Jun 2022 14:06:04 +0000 (+0200)
Subject: sys_linux: increase number of PHC readings
X-Git-Tag: 4.3-pre1~33
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d5300559170c15647f49f36d826dfc051b7ca074;p=thirdparty%2Fchrony.git

sys_linux: increase number of PHC readings

Increase the number of requested readings from 10 to 25 - the maximum
accepted by the PTP_SYS_OFFSET* ioctls. This should improve stability of
HW clock tracking and PHC refclock.
---

diff --git a/sys_linux.c b/sys_linux.c
index 762bf0a4..fd818e3e 100644
--- a/sys_linux.c
+++ b/sys_linux.c
@@ -794,7 +794,7 @@ SYS_Linux_CheckKernelVersion(int req_major, int req_minor)
 
 #if defined(FEAT_PHC) || defined(HAVE_LINUX_TIMESTAMPING)
 
-#define PHC_READINGS 10
+#define PHC_READINGS 25
 
 static int
 process_phc_readings(struct timespec ts[][3], int n, double precision,