Performance improvements for recordingSpan SetAttributes and addOverCapAttrs
#5864
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benchstat:
```
goos: linux
goarch: amd64
pkg: go.opentelemetry.io/otel/sdk/trace
cpu: 11th Gen Intel(R) Core(TM) i5-11400H @ 2.70GHz
│ new.txt │ new1.txt │
│ sec/op │ sec/op vs base │
TraceStart/with_a_simple_span-12 451.0n ± 5% 375.0n ± 1% -16.85% (p=0.000 n=10)
TraceStart/with_several_links-12 595.8n ± 3% 501.7n ± 1% -15.80% (p=0.000 n=10)
TraceStart/with_attributes-12 644.5n ± 10% 569.5n ± 4% -11.63% (p=0.000 n=10)
geomean 557.4n 474.9n -14.79%
│ new.txt │ new1.txt │
│ B/op │ B/op vs base │
TraceStart/with_a_simple_span-12 496.0 ± 0% 496.0 ± 0% ~ (p=1.000 n=10) ¹
TraceStart/with_several_links-12 672.0 ± 0% 672.0 ± 0% ~ (p=1.000 n=10) ¹
TraceStart/with_attributes-12 752.0 ± 0% 752.0 ± 0% ~ (p=1.000 n=10) ¹
geomean 630.5 630.5 +0.00%
¹ all samples are equal
│ new.txt │ new1.txt │
│ allocs/op │ allocs/op vs base │
TraceStart/with_a_simple_span-12 2.000 ± 0% 2.000 ± 0% ~ (p=1.000 n=10) ¹
TraceStart/with_several_links-12 3.000 ± 0% 3.000 ± 0% ~ (p=1.000 n=10) ¹
TraceStart/with_attributes-12 4.000 ± 0% 4.000 ± 0% ~ (p=1.000 n=10) ¹
geomean 2.884 2.884 +0.00%
¹ all samples are equal
```
Grow increases the slice's capacity, if necessary, to guarantee space for another n elements. This change now ensures that `n` is the amount of elements to grow and not the capacity amount.
boekkooi-impossiblecloud
requested review from
MrAlias,
XSAM,
dashpole,
pellared,
hanyuancheung and
dmathieu
as code owners
|
Could you post benchstat results showing the improvements? |
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Codecov ReportAll modified and coverable lines are covered by tests ✅
Additional details and impacted files@@ Coverage Diff @@
## main #5864 +/- ##
=======================================
- Coverage 84.6% 84.5% -0.1%
=======================================
Files 272 272
Lines 22779 22800 +21
=======================================
+ Hits 19272 19283 +11
- Misses 3165 3171 +6
- Partials 342 346 +4 |
dashpole
approved these changes
Oct 3, 2024
|
Hey @dashpole Benchstat for f6fd877 are as follows. |
dmathieu
approved these changes
Oct 4, 2024
Co-authored-by: Damien Mathieu <42@dmathieu.com>
dmathieu
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Oct 9, 2024
Good day, Thanks for review this PR! This PR follows from #5864 and avoid multiple locks in `End`, `RecordError`, `AddEvent` and `AddLink`. Benchstats result are: ``` goos: linux goarch: amd64 pkg: go.opentelemetry.io/otel/sdk/trace cpu: 11th Gen Intel(R) Core(TM) i5-11400H @ 2.70GHz │ event-3cbd9671.txt │ event-pr-e9744b48.txt │ │ sec/op │ │ SpanEnd-12 63.07n ± 1% 53.63n ± 1% -14.97% (p=0.000 n=10) │ event-3cbd9671.txt │ event-pr-e9744b48.txt │ │ B/op │ B/op vs base │ SpanEnd-12 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹ ¹ all samples are equal │ event-3cbd9671.txt │ event-pr-e9744b48.txt │ │ allocs/op │ allocs/op vs base │ SpanEnd-12 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹ ¹ all samples are equal ``` --------- Co-authored-by: David Ashpole <dashpole@google.com> Co-authored-by: Damien Mathieu <42@dmathieu.com>
dashpole
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Oct 11, 2024
### Added - Add `go.opentelemetry.io/otel/sdk/metric/exemplar` package which includes `Exemplar`, `Filter`, `TraceBasedFilter`, `AlwaysOnFilter`, `HistogramReservoir`, `FixedSizeReservoir`, `Reservoir`, `Value` and `ValueType` types. These will be used for configuring the exemplar reservoir for the metrics sdk. (#5747, #5862) - Add `WithExportBufferSize` option to log batch processor.(#5877) ### Changed - Enable exemplars by default in `go.opentelemetry.io/otel/sdk/metric`. Exemplars can be disabled by setting `OTEL_METRICS_EXEMPLAR_FILTER=always_off` (#5778) - `Logger.Enabled` in `go.opentelemetry.io/otel/log` now accepts a newly introduced `EnabledParameters` type instead of `Record`. (#5791) - `FilterProcessor.Enabled` in `go.opentelemetry.io/otel/sdk/log/internal/x` now accepts `EnabledParameters` instead of `Record`. (#5791) - The `Record` type in `go.opentelemetry.io/otel/log` is no longer comparable. (#5847) - Performance improvements for the trace SDK `SetAttributes` method in `Span`. (#5864) - Reduce memory allocations for the `Event` and `Link` lists in `Span`. (#5858) - Performance improvements for the trace SDK `AddEvent`, `AddLink`, `RecordError` and `End` methods in `Span`. (#5874) ### Deprecated - Deprecate all examples under `go.opentelemetry.io/otel/example` as they are moved to [Contrib repository](https://github.com/open-telemetry/opentelemetry-go-contrib/tree/main/examples). (#5854) ### Fixed - The race condition for multiple `FixedSize` exemplar reservoirs identified in #5814 is resolved. (#5819) - Fix log records duplication in case of heterogeneous resource attributes by correctly mapping each log record to it's resource and scope. (#5803) - Fix timer channel drain to avoid hanging on Go 1.23. (#5868) - Fix delegation for global meter providers, and panic when calling otel.SetMeterProvider. (#5827) - Change the `reflect.TypeOf` to use a nil pointer to not allocate on the heap unless necessary. (#5827)
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Good day,
While working on #5858 I found some other possible improvements.
This PR:
SetAttributeswhen no attributes are provided.s.attributesto guarantee that there is enough space for elements to be added.truncateAttrwas not used when a attribute was being updated inaddOverCapAttrs.Thanks for reviewing and please let me know if any changes are needed.