2 Commits

Author	SHA1	Message	Date
Percy Wegmann	5095efd628	prober: make histogram buckets cumulative ... Histogram buckets should include counts for all values under the bucket ceiling, not just those between the ceiling and the next lower ceiling. See https://prometheus.io/docs/tutorials/understanding_metric_types/\#histogram Updates tailscale/corp#24522 Signed-off-by: Percy Wegmann <percy@tailscale.com>	2024-12-20 10:28:37 -06:00
Percy Wegmann	00a4504cf1	cmd/derpprobe,prober: add ability to perform continuous queuing delay measurements against DERP servers ... This new type of probe sends DERP packets sized similarly to CallMeMaybe packets at a rate of 10 packets per second. It records the round-trip times in a Prometheus histogram. It also keeps track of how many packets are dropped. Packets that fail to arrive within 5 seconds are considered dropped. Updates tailscale/corp#24522 Signed-off-by: Percy Wegmann <percy@tailscale.com>	2024-12-19 10:45:56 -06:00