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net/sockstats: expose debug info

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Exposes some internal state of the sockstats package via the C2N and
PeerAPI endpoints, so that it can be used for debugging. For now this
includes the estimated radio on percentage and a second-by-second view
of the times the radio was active.

Also fixes another off-by-one error in the radio on percentage that
was leading to >100% values (if n seconds have passed since we started
to monitor, there may be n + 1 possible seconds where the radio could
have been on).

Updates tailscale/corp#9230

Signed-off-by: Mihai Parparita <mihai@tailscale.com>
This commit is contained in:
Mihai Parparita
2023-04-19 13:45:02 -07:00
committed by Mihai Parparita
parent 7c386ca6d2
commit d0906cda97
6 changed files with 88 additions and 21 deletions
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13
net/sockstats/sockstats_tsgo_test.go
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@ -37,10 +37,19 @@ func TestRadioMonitor(t *testing.T) {
"active, 10 sec idle",
func(tt *testTime, rm *radioMonitor) {
rm.active()
tt.Add(10 * time.Second)
tt.Add(9 * time.Second)
},
50, // radio on 5 seconds of 10 seconds
},
{
"active, spanning two seconds",
func(tt *testTime, rm *radioMonitor) {
rm.active()
tt.Add(1100 * time.Millisecond)
rm.active()
},
100, // radio on for 2 seconds
},
{
"400 iterations: 2 sec active, 1 min idle",
func(tt *testTime, rm *radioMonitor) {
@ -57,7 +66,7 @@ func TestRadioMonitor(t *testing.T) {
{
"activity at end of time window",
func(tt *testTime, rm *radioMonitor) {
tt.Add(2 * time.Second)
tt.Add(1 * time.Second)
rm.active()
},
50,