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fn: lb-agent: Add Runner Scheduler/Execution Stats (#1107)

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LB agent reports lb placer latency. It should also report
how long it took for the runner to initiate the call as
well as execution time inside the container if the runner
has accepted (committed) to the call.
This commit is contained in:
Tolga Ceylan
2018-07-02 17:15:43 -07:00
committed by GitHub
parent e0ae9cc679
commit 317de18e6b
8 changed files with 172 additions and 53 deletions
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6
api/runnerpool/placer_stats.go
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@@ -38,18 +38,18 @@ func newAttemptTracker(ctx context.Context) *attemptTracker {
}
}
func (data *attemptTracker) finalizeAttempts(isSuccess bool) {
func (data *attemptTracker) finalizeAttempts(isCommited bool) {
stats.Record(data.ctx, attemptCountMeasure.M(data.attemptCount))
// IMPORTANT: here we use (lastAttemptTime - startTime). We want to exclude TryExec
// latency *if* TryExec() goes through with success. Placer latency metric only shows
// latency *if* TryExec() goes through with commit. Placer latency metric only shows
// how much time are spending in Placer loop/retries. The metric includes rtt/latency of
// *all* unsuccessful NACK (retriable) responses from runners as well. For example, if
// Placer loop here retries 4 runners (which takes 5 msecs each) and then 5th runner
// succeeds (but takes 35 seconds to finish execution), we report 20 msecs as our LB
// latency.
endTime := data.lastAttemptTime
if !isSuccess {
if !isCommited {
endTime = time.Now()
}