4 Commits (79a478bb6176425c2400e949890e668a3d9a3d05)

Author	SHA1	Message	Date
Felix Lange	c539bda166	metrics: improve reading Go runtime metrics (#25886) ... This changes how we read performance metrics from the Go runtime. Instead of using runtime.ReadMemStats, we now rely on the API provided by package runtime/metrics. runtime/metrics provides more accurate information. For example, the new interface has better reporting of memory use. In my testing, the reported value of held memory more accurately reflects the usage reported by the OS. The semantics of metrics system/memory/allocs and system/memory/frees have changed to report amounts in bytes. ReadMemStats only reported the count of allocations in number-of-objects. This is imprecise: 'tiny objects' are not counted because the runtime allocates them in batches; and certain improvements in allocation behavior, such as struct size optimizations, will be less visible when the number of allocs doesn't change. Changing allocation reports to be in bytes makes it appear in graphs that lots more is being allocated. I don't think that's a problem because this metric is primarily interesting for geth developers. The metric system/memory/pauses has been changed to report statistical values from the histogram provided by the runtime. Its name in influxdb has changed from geth.system/memory/pauses.meter to geth.system/memory/pauses.histogram. We also have a new histogram metric, system/cpu/schedlatency, reporting the Go scheduler latency.	2 years ago
Håvard Anda Estensen	07508ac0e9	all: replace uses of ioutil with io and os (#24869)	3 years ago
Anton Evangelatov	3ca3fffdf0	metrics: fix flaky Example metrics test (#16222) ... * metrics: add sleep to test in order to get predictable output * metrics: relax constraints on timer test	7 years ago
Anton Evangelatov	ae9f97221a	metrics: pull library and introduce ResettingTimer and InfluxDB reporter (#15910) ... * go-metrics: fork library and introduce ResettingTimer and InfluxDB reporter. * vendor: change nonsense/go-metrics to ethersphere/go-metrics * go-metrics: add tests. move ResettingTimer logic from reporter to type. * all, metrics: pull in metrics package in go-ethereum * metrics/test: make sure metrics are enabled for tests * metrics: apply gosimple rules * metrics/exp, internal/debug: init expvar endpoint when starting pprof server * internal/debug: tiny comment formatting fix	7 years ago