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A Futures-aware metrics library for recording statistics about your running system.

License: Apache License 2.0

Rust 100.00%

rust tokio-rs linkerd metrics prometheus

tacho's Introduction

Tacho

A Prometheus-focused metrics library for Future-aware Rust applications.

Inspired by finagle-stats.
Supports Prometheus-style labels and formatting.
Supports scoped.
Future-aware timing histograms.
Thread-safe.

License

Licensed under the Apache License, Version 2.0 (the "License"); you may not use these files except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

tacho's People

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alexxnica kryndex danburkert knsd sgrankin isabella232

tacho's Issues

Trimming down time to process work items

In an attempt to fix linkerd/linkerd-tcp#35 I'm benchmarking master vs ver/synchro-system (using time cargo run --release --example multithread | tee output.txt and want to share some numbers.

ver/synchro-system output (this is the last report from the metrics reporter)

metrics_count 5
loop_iters_count{role="worker"} 1000000000
loop_iters_curr{role="worker"} 999999999
total_time_ms{role="worker"} 654672
heartbeats{role="heartbeat"} 653
loop_time_us{stat="count", role="worker"} 1086186
loop_time_us{stat="mean", role="worker"} 0.0055248364460598835
loop_time_us{stat="min", role="worker"} 0
loop_time_us{stat="max", role="worker"} 414
loop_time_us{stat="stddev", role="worker"} 0.42562936784848004
loop_time_us{stat="p50", role="worker"} 0
loop_time_us{stat="p90", role="worker"} 0
loop_time_us{stat="p95", role="worker"} 0
loop_time_us{stat="p99", role="worker"} 0
loop_time_us{stat="p999", role="worker"} 0
loop_time_us{stat="p9999", role="worker"} 0

real	10m54.844s
user	8m5.564s
sys	2m49.460s

master output. (note our last report doesn't show the last batch of items being processed)

metrics_count 4
loop_iters_count{role="worker"} 999826348
loop_iters_curr{role="worker"} 999826347
heartbeats{role="heartbeat"} 5377
loop_time_us{stat="count", role="worker"} 374274
loop_time_us{stat="mean", role="worker"} 1.7634861091072316
loop_time_us{stat="min", role="worker"} 0
loop_time_us{stat="max", role="worker"} 137
loop_time_us{stat="stddev", role="worker"} 2.118960934392008
loop_time_us{stat="p50", role="worker"} 0
loop_time_us{stat="p90", role="worker"} 0
loop_time_us{stat="p95", role="worker"} 0
loop_time_us{stat="p99", role="worker"} 0
loop_time_us{stat="p999", role="worker"} 0
loop_time_us{stat="p9999", role="worker"} 0

real	89m39.084s
user	102m42.164s
sys	63m15.424s

The example in master is 9x slower than the version in very/synchro-system. I'll build some flame graphs so compare the two.

Measuring latency hyper async (based on tokio-rs)

Can you provide an example of how to use this to measure latency for hyper (0.0.11 async - based on tokio-rs) ?

Can we work together

github.com/posix4e/rust-metrics <- I am currently working on getting this integrated into tokio itself. Anyway we can join forces @durch should be able to help develope as well.

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