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net/netmon, net/tsdial: add some link change metrics

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Updates #9040

Change-Id: I2c87572d79d2118bcf1f0122eccfe712c1bea9d5
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick
2023-09-01 19:56:18 -07:00
committed by Brad Fitzpatrick
parent 8683ce78c2
commit 1262df0578
3 changed files with 27 additions and 1 deletions
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16
net/netmon/netmon.go
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@@ -16,6 +16,7 @@ import (
"tailscale.com/net/interfaces"
"tailscale.com/types/logger"
"tailscale.com/util/clientmetric"
"tailscale.com/util/set"
)
@@ -369,6 +370,13 @@ func (m *Monitor) debounce() {
}
}
var (
metricChangeEq = clientmetric.NewCounter("netmon_link_change_eq")
metricChange = clientmetric.NewCounter("netmon_link_change")
metricChangeTimeJump = clientmetric.NewCounter("netmon_link_change_timejump")
metricChangeMajor = clientmetric.NewCounter("netmon_link_change_major")
)
// handlePotentialChange considers whether newState is different enough to wake
// up callers and updates the monitor's state if so.
//
@@ -380,6 +388,7 @@ func (m *Monitor) handlePotentialChange(newState *interfaces.State, forceCallbac
timeJumped := shouldMonitorTimeJump && m.checkWallTimeAdvanceLocked()
if !timeJumped && !forceCallbacks && oldState.Equal(newState) {
// Exactly equal. Nothing to do.
metricChangeEq.Add(1)
return
}
@@ -410,6 +419,13 @@ func (m *Monitor) handlePotentialChange(newState *interfaces.State, forceCallbac
delta.Major = true
}
}
metricChange.Add(1)
if delta.Major {
metricChangeMajor.Add(1)
}
if delta.TimeJumped {
metricChangeTimeJump.Add(1)
}
for _, cb := range m.cbs {
go cb(delta)
}