Different unit of timestamp in metrics_service in linux and macos #4278
Description
Description:
Envoy sends a different value for timestamps to metrics_service in linux and macos: nanos in linux and micros in macos.
Problem reproduced in 1.7.0 and in current master.
Repro steps:
Sample "metrics_service" and envoy config are here: https://github.com/lomik/envoy-issue/tree/master/metric_service_timestamp
Macos output:
&io_prometheus_client.Metric{Label:[]*io_prometheus_client.LabelPair(nil), Gauge:(*io_prometheus_client.Gauge)(nil), Counter:(*io_prometheus_client.Counter)(nil), Summary:(*io_prometheus_client.Summary)(0xc0001d61b0), Untyped:(*io_prometheus_client.Untyped)(nil), Histogram:(*io_prometheus_client.Histogram)(nil), TimestampMs:1535464990220755}
# TimestampMs:1535464990220755
Linux output:
&io_prometheus_client.Metric{Label:[]*io_prometheus_client.LabelPair(nil), Gauge:(*io_prometheus_client.Gauge)(0xc420026818), Counter:(*io_prometheus_client.Counter)(nil), Summary:(*io_prometheus_client.Summary)(nil), Untyped:(*io_prometheus_client.Untyped)(nil), Histogram:(*io_prometheus_client.Histogram)(nil), TimestampMs:1535465054722145763}
# TimestampMs:1535465054722145763