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Use simpler locking in the Go 1.17 collector (#975) A previous PR made it so that the Go 1.17 collector locked only around uses of rmSampleBuf, but really that means that Metric values may be sent over the channel containing some values from future metrics.Read calls. While generally-speaking this isn't a problem, we lose any consistency guarantees provided by the runtime/metrics package. Also, that optimization to not just lock around all of Collect was premature. Truthfully, Collect is called relatively infrequently, and its critical path is fairly fast (10s of µs). To prove it, this change also adds a benchmark. name old time/op new time/op delta GoCollector-16 43.7µs ± 2% 43.2µs ± 2% ~ (p=0.190 n=9+9) Note that because the benchmark is single-threaded it actually looks like it might be getting slightly faster, because all those Collect calls for the Metrics are direct calls instead of interface calls. Signed-off-by: Michael Anthony Knyszek mknyszek@google.com Configuration menu Browse the repository at this point in the history
API client: make http reads more efficient (#976) Replace io.ReadAll with bytes.Buffer.ReadFrom. Both need to resize a buffer until they have finished reading; the former increases by 1.25x each time while the latter uses 2x. Also added a benchmark to demonstrate the benefit: name old time/op new time/op delta Client/4KB-8 35.9µs ± 4% 35.3µs ± 3% ~ (p=0.310 n=5+5) Client/50KB-8 83.1µs ± 8% 69.5µs ± 1% -16.37% (p=0.008 n=5+5) Client/1000KB-8 891µs ± 6% 750µs ± 0% -15.83% (p=0.016 n=5+4) Client/2000KB-8 1.74ms ± 2% 1.35ms ± 1% -22.72% (p=0.008 n=5+5) name old alloc/op new alloc/op delta Client/4KB-8 20.2kB ± 0% 20.4kB ± 0% +1.26% (p=0.008 n=5+5) Client/50KB-8 218kB ± 0% 136kB ± 0% -37.65% (p=0.008 n=5+5) Client/1000KB-8 5.88MB ± 0% 2.11MB ± 0% -64.10% (p=0.008 n=5+5) Client/2000KB-8 11.7MB ± 0% 4.2MB ± 0% -63.93% (p=0.008 n=5+5) name old allocs/op new allocs/op delta Client/4KB-8 75.0 ± 0% 72.0 ± 0% -4.00% (p=0.008 n=5+5) Client/50KB-8 109 ± 0% 98 ± 0% -10.09% (p=0.079 n=4+5) Client/1000KB-8 617 ± 0% 593 ± 0% -3.89% (p=0.008 n=5+5) Client/2000KB-8 1.13k ± 0% 1.09k ± 0% -3.27% (p=0.008 n=5+5) Signed-off-by: Bryan Boreham bjboreham@gmail.com Configuration menu Browse the repository at this point in the history
Reduce granularity of histogram buckets for Go 1.17 collector (#974) The Go runtime/metrics package currently exports extremely granular histograms. Exponentially bucket any histogram with unit "seconds" or "bytes" instead to dramatically reduce the number of buckets, and thus the number of metrics. This change also adds a test to check for expected cardinality to prevent cardinality surprises in the future. Signed-off-by: Michael Anthony Knyszek mknyszek@google.com Configuration menu Browse the repository at this point in the history
Apply review suggestions Signed-off-by: Kemal Akkoyun kakkoyun@gmail.com Configuration menu Browse the repository at this point in the history
Fix deprecated NewBuildInfoCollector API Update examples/random/main.go: prometheus.NewBuildInfoCollector is deprecated. Use collectors.NewBuildInfoCollector instead. Signed-off-by: alissa-tung alissa-tung@outlook.com Configuration menu Browse the repository at this point in the history
gocollector: Added options to Go Collector for diffetent collections. Fixes #983 Also:
fixed TestMemStatsEquivalence, it was noop before (:
Removed gc_cpu_fraction metric completely, since it's not working completely for Go1.17+ Signed-off-by: Bartlomiej Plotka bwplotka@gmail.com Configuration menu Browse the repository at this point in the history
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Remove -Inf buckets from go collector histograms Signed-off-by: Kemal Akkoyun kakkoyun@gmail.com
Update prometheus/collectors/go_collector_latest_test.go Co-authored-by: Bartlomiej Plotka bwplotka@gmail.com Signed-off-by: Kemal Akkoyun kakkoyun@gmail.com
Simplify Signed-off-by: Kemal Akkoyun kakkoyun@gmail.com Co-authored-by: Bartlomiej Plotka bwplotka@gmail.com Configuration menu Browse the repository at this point in the history
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Update CHANGELOG.md Co-authored-by: Bartlomiej Plotka bwplotka@gmail.com Signed-off-by: Kemal Akkoyun kakkoyun@gmail.com Co-authored-by: Bartlomiej Plotka bwplotka@gmail.com Configuration menu Browse the repository at this point in the history
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