7.55.3 final PR

[Pythyu]

What does this PR do?

7.55.3 final PR

Motivation

Additional Notes

Possible Drawbacks / Trade-offs

Describe how to test/QA your changes

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 44.93%. Comparing base (2fffda3) to head (42a547a).

Additional details and impacted files

@@            Coverage Diff             @@
##           7.55.x   #28136      +/-   ##
==========================================
- Coverage   44.93%   44.93%   -0.01%     
==========================================
  Files        2354     2354              
  Lines      272910   272910              
==========================================
- Hits       122643   122642       -1     
  Misses     140591   140591              
- Partials     9676     9677       +1     

Flag	Coverage Δ
amzn_aarch64	45.78% <ø> (-0.01%)	⬇️
centos_x86_64	45.69% <ø> (-0.01%)	⬇️
ubuntu_aarch64	45.78% <ø> (-0.01%)	⬇️
ubuntu_x86_64	45.77% <ø> (-0.01%)	⬇️
windows_amd64	50.76% <ø> (-0.01%)	⬇️

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[pr-commenter]

Regression Detector

Regression Detector Results

Run ID: 6a455bcc-83b2-416a-8379-9b7188427e41

Baseline: 2fffda3
Comparison: 42a547a

Performance changes are noted in the perf column of each table:

• ✅ = significantly better comparison variant performance
• ❌ = significantly worse comparison variant performance
• ➖ = no significant change in performance

No significant changes in experiment optimization goals

Confidence level: 90.00%
Effect size tolerance: |Δ mean %| ≥ 5.00%

There were no significant changes in experiment optimization goals at this confidence level and effect size tolerance.

Fine details of change detection per experiment

perf	experiment	goal	Δ mean %	Δ mean % CI	links
➖	pycheck_1000_100byte_tags	% cpu utilization	+0.36	[-4.44, +5.17]
➖	idle	memory utilization	+0.26	[+0.23, +0.29]
➖	basic_py_check	% cpu utilization	+0.12	[-2.50, +2.74]
➖	file_tree	memory utilization	+0.08	[-0.00, +0.16]
➖	trace_agent_msgpack	ingress throughput	+0.00	[-0.00, +0.00]
➖	uds_dogstatsd_to_api	ingress throughput	-0.00	[-0.20, +0.20]
➖	trace_agent_json	ingress throughput	-0.01	[-0.04, +0.02]
➖	tcp_dd_logs_filter_exclude	ingress throughput	-0.02	[-0.07, +0.03]
➖	otel_to_otel_logs	ingress throughput	-0.04	[-0.39, +0.32]
➖	tcp_syslog_to_blackhole	ingress throughput	-0.16	[-21.56, +21.24]
➖	uds_dogstatsd_to_api_cpu	% cpu utilization	-1.25	[-4.06, +1.57]

Explanation

A regression test is an A/B test of target performance in a repeatable rig, where "performance" is measured as "comparison variant minus baseline variant" for an optimization goal (e.g., ingress throughput). Due to intrinsic variability in measuring that goal, we can only estimate its mean value for each experiment; we report uncertainty in that value as a 90.00% confidence interval denoted "Δ mean % CI".

For each experiment, we decide whether a change in performance is a "regression" -- a change worth investigating further -- if all of the following criteria are true:

1. Its estimated |Δ mean %| ≥ 5.00%, indicating the change is big enough to merit a closer look.

2. Its 90.00% confidence interval "Δ mean % CI" does not contain zero, indicating that if our statistical model is accurate, there is at least a 90.00% chance there is a difference in performance between baseline and comparison variants.

3. Its configuration does not mark it "erratic".

[cswatt]

relnote lgtm