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ntp: add maximum PHC poll interval

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Specify maxpoll for HW timestamping (default minpoll + 1) to track the
PHC well even when there is little NTP traffic on the interface. After
each PHC reading schedule a timeout according to the maxpoll. Polling
between minpoll and maxpoll is still triggered by HW timestamps.

Wait for the first HW timestamp before adding the timeout to avoid
polling PHCs on interfaces that are enabled in the configuration but
not used for NTP. Add a new scheduling class to separate polling of
different PHCs to avoid too long intervals between processing I/O
events.
This commit is contained in:
Miroslav Lichvar
2023-03-14 12:23:21 +01:00
parent b0a2ad2535
commit 5160f14fdc
6 changed files with 124 additions and 26 deletions
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31
test/simulation/133-hwtimestamp
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@@ -47,9 +47,10 @@ for client_conf in \
check_log_messages "Received error.*message.*tss=KH" 195 200 || test_fail
check_log_messages "Updated RX timestamp.*tss=1" 1 1 || test_fail
check_log_messages "Updated RX timestamp.*tss=2" 195 200 || test_fail
check_log_messages "Polling PHC" 195 220 || test_fail
if echo "$client_conf" | grep -q nocrossts; then
check_log_messages "update_tx_timestamp.*Updated" 180 200 || test_fail
check_log_messages "update_tx_timestamp.*Unacceptable" 0 10 || test_fail
check_log_messages "update_tx_timestamp.*Unacceptable" 0 13 || test_fail
else
check_log_messages "update_tx_timestamp.*Updated" 50 140 || test_fail
check_log_messages "update_tx_timestamp.*Unacceptable" 50 140 || test_fail
@@ -57,4 +58,32 @@ for client_conf in \
fi
done
server_conf+="
server 192.168.123.2 minpoll 1 maxpoll 1 noselect"
for maxpoll in -1 0 1; do
client_conf="hwtimestamp eth0 minpoll -1 maxpoll $maxpoll nocrossts"
run_test || test_fail
check_chronyd_exit || test_fail
check_source_selection || test_fail
check_sync || test_fail
if check_config_h 'FEAT_DEBUG 1'; then
case $maxpoll in
-1)
check_log_messages "Polling PHC on eth0$" 360 380 || test_fail
check_log_messages "Polling PHC.*before" 3 25 || test_fail
;;
0)
check_log_messages "Polling PHC on eth0$" 8 45 || test_fail
check_log_messages "Polling PHC.*before" 150 190 || test_fail
;;
1)
check_log_messages "Polling PHC on eth0$" 1 1 || test_fail
check_log_messages "Polling PHC.*before" 194 199 || test_fail
;;
esac
fi
done
test_pass