a2233bfe46
Fixes #4425 * add more logging for responses and sync process * adjust time sync constants * change the way poll interval is chosen (increasing on good sync, decreasing on variation) * filter out spikes Based on flow in https://github.com/systemd/systemd/blob/main/src/timesync/timesyncd-manager.c Signed-off-by: Andrey Smirnov <andrey.smirnov@talos-systems.com>
26 lines
1.1 KiB
Go
26 lines
1.1 KiB
Go
// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this
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// file, You can obtain one at http://mozilla.org/MPL/2.0/.
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package ntp
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import "time"
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const (
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// MinAllowablePoll is the minimum time allowed for a client to query a time server.
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MinAllowablePoll = 32 * time.Second
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// MaxAllowablePoll is the maximum allowed interval for querying a time server.
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MaxAllowablePoll = 2048 * time.Second
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// RetryPoll is the interval between retries if the error is not Kiss-o-Death.
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RetryPoll = time.Second
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// AdjustTimeLimit is a maximum time drift to compensate via adjtimex().
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//
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// Deltas smaller than AdjustTimeLimit are gradually adjusted (slewed) to approach the network time.
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// Deltas larger than AdjustTimeLimit are set by letting the system time jump.
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AdjustTimeLimit = 400 * time.Millisecond
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// EpochLimit is a minimum time difference to signal that change as epoch change.
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EpochLimit = 15 * time.Minute
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// ExpectedAccuracy is the expected time sync accuracy, used to adjust poll interval.
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ExpectedAccuracy = 200 * time.Millisecond
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)
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