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[EBPF] Ignore unchanged programs when calculating complexity changes #32015

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merged 2 commits into from
Dec 11, 2024

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gjulianm
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@gjulianm gjulianm commented Dec 11, 2024

What does this PR do?

This PR fixes the ebpf.generate-complexity-summary-for-pr task, which reports that the "highest complexity change" is 0 when complexity is reduced in some programs and others are unchanged. Now only programs that have complexity changes are taken into account for that summary, which is more in-line with how the task ignores unchanged object files, for example.

Motivation

See #31947 (comment) for an example of a PR with an erroneous comment.

Describe how you validated your changes

Tested locally.

Possible Drawbacks / Trade-offs

Additional Notes

@gjulianm gjulianm self-assigned this Dec 11, 2024
@gjulianm gjulianm added changelog/no-changelog qa/no-code-change No code change in Agent code requiring validation team/ebpf-platform labels Dec 11, 2024
@github-actions github-actions bot added the short review PR is simple enough to be reviewed quickly label Dec 11, 2024
@gjulianm gjulianm marked this pull request as ready for review December 11, 2024 13:30
@gjulianm gjulianm requested a review from a team as a code owner December 11, 2024 13:31
tasks/ebpf.py Outdated
@@ -724,6 +724,7 @@ def _try_delete_github_comment(msg: str):

current_branch_artifacts_path = Path(current_branch_artifacts_path)
complexity_files = list(current_branch_artifacts_path.glob("verifier-complexity-*.tar.gz"))
print(complexity_files)
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do you need it here?

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Woops, forgotten debug print 😅

@github-actions github-actions bot added medium review PR review might take time and removed short review PR is simple enough to be reviewed quickly labels Dec 11, 2024
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[Fast Unit Tests Report]

On pipeline 50832870 (CI Visibility). The following jobs did not run any unit tests:

Jobs:
  • tests_deb-arm64-py3
  • tests_deb-x64-py3
  • tests_flavor_dogstatsd_deb-x64
  • tests_flavor_heroku_deb-x64
  • tests_flavor_iot_deb-x64
  • tests_rpm-arm64-py3
  • tests_rpm-x64-py3
  • tests_windows-x64

If you modified Go files and expected unit tests to run in these jobs, please double check the job logs. If you think tests should have been executed reach out to #agent-devx-help

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Package size comparison

Comparison with ancestor c23991318bdae9f2137171b7d8d44e7753d2e346

Diff per package
package diff status size ancestor threshold
datadog-agent-amd64-deb 0.00MB 1271.34MB 1271.34MB 140.00MB
datadog-iot-agent-amd64-deb 0.00MB 113.22MB 113.22MB 10.00MB
datadog-dogstatsd-amd64-deb 0.00MB 78.33MB 78.33MB 10.00MB
datadog-heroku-agent-amd64-deb 0.00MB 526.49MB 526.49MB 70.00MB
datadog-agent-x86_64-rpm 0.00MB 1280.57MB 1280.57MB 140.00MB
datadog-agent-x86_64-suse 0.00MB 1280.57MB 1280.57MB 140.00MB
datadog-iot-agent-x86_64-rpm 0.00MB 113.29MB 113.29MB 10.00MB
datadog-iot-agent-x86_64-suse 0.00MB 113.29MB 113.29MB 10.00MB
datadog-dogstatsd-x86_64-rpm 0.00MB 78.41MB 78.41MB 10.00MB
datadog-dogstatsd-x86_64-suse 0.00MB 78.41MB 78.41MB 10.00MB
datadog-agent-arm64-deb 0.00MB 1005.48MB 1005.48MB 140.00MB
datadog-iot-agent-arm64-deb 0.00MB 108.71MB 108.71MB 10.00MB
datadog-dogstatsd-arm64-deb 0.00MB 55.60MB 55.60MB 10.00MB
datadog-agent-aarch64-rpm 0.00MB 1014.69MB 1014.69MB 140.00MB
datadog-iot-agent-aarch64-rpm 0.00MB 108.78MB 108.78MB 10.00MB

Decision

✅ Passed

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Regression Detector

Regression Detector Results

Metrics dashboard
Target profiles
Run ID: 64398903-2016-4cdb-a6af-947d3eb23922

Baseline: c239913
Comparison: 55ed398
Diff

Optimization Goals: ✅ No significant changes detected

Fine details of change detection per experiment

perf experiment goal Δ mean % Δ mean % CI trials links
tcp_syslog_to_blackhole ingress throughput +0.88 [+0.82, +0.94] 1 Logs
uds_dogstatsd_to_api_cpu % cpu utilization +0.44 [-0.29, +1.17] 1 Logs
quality_gate_idle memory utilization +0.33 [+0.29, +0.38] 1 Logs bounds checks dashboard
file_to_blackhole_500ms_latency egress throughput +0.00 [-0.77, +0.78] 1 Logs
tcp_dd_logs_filter_exclude ingress throughput +0.00 [-0.01, +0.01] 1 Logs
file_to_blackhole_0ms_latency_http2 egress throughput -0.01 [-0.80, +0.79] 1 Logs
uds_dogstatsd_to_api ingress throughput -0.02 [-0.13, +0.09] 1 Logs
file_to_blackhole_0ms_latency egress throughput -0.03 [-0.90, +0.84] 1 Logs
file_to_blackhole_0ms_latency_http1 egress throughput -0.03 [-0.85, +0.78] 1 Logs
file_to_blackhole_100ms_latency egress throughput -0.05 [-0.76, +0.65] 1 Logs
file_tree memory utilization -0.06 [-0.17, +0.06] 1 Logs
file_to_blackhole_300ms_latency egress throughput -0.16 [-0.79, +0.47] 1 Logs
quality_gate_logs % cpu utilization -0.22 [-3.14, +2.69] 1 Logs
quality_gate_idle_all_features memory utilization -0.38 [-0.50, -0.26] 1 Logs bounds checks dashboard
file_to_blackhole_1000ms_latency_linear_load egress throughput -0.43 [-0.89, +0.04] 1 Logs
file_to_blackhole_1000ms_latency egress throughput -0.56 [-1.35, +0.22] 1 Logs
otel_to_otel_logs ingress throughput -1.00 [-1.72, -0.28] 1 Logs

Bounds Checks: ✅ Passed

perf experiment bounds_check_name replicates_passed links
file_to_blackhole_0ms_latency lost_bytes 10/10
file_to_blackhole_0ms_latency memory_usage 10/10
file_to_blackhole_0ms_latency_http1 lost_bytes 10/10
file_to_blackhole_0ms_latency_http1 memory_usage 10/10
file_to_blackhole_0ms_latency_http2 lost_bytes 10/10
file_to_blackhole_0ms_latency_http2 memory_usage 10/10
file_to_blackhole_1000ms_latency memory_usage 10/10
file_to_blackhole_1000ms_latency_linear_load memory_usage 10/10
file_to_blackhole_100ms_latency lost_bytes 10/10
file_to_blackhole_100ms_latency memory_usage 10/10
file_to_blackhole_300ms_latency lost_bytes 10/10
file_to_blackhole_300ms_latency memory_usage 10/10
file_to_blackhole_500ms_latency lost_bytes 10/10
file_to_blackhole_500ms_latency memory_usage 10/10
quality_gate_idle memory_usage 10/10 bounds checks dashboard
quality_gate_idle_all_features memory_usage 10/10 bounds checks dashboard
quality_gate_logs lost_bytes 10/10
quality_gate_logs memory_usage 10/10

Explanation

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

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

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".

CI Pass/Fail Decision

Passed. All Quality Gates passed.

  • quality_gate_idle, bounds check memory_usage: 10/10 replicas passed. Gate passed.
  • quality_gate_idle_all_features, bounds check memory_usage: 10/10 replicas passed. Gate passed.
  • quality_gate_logs, bounds check lost_bytes: 10/10 replicas passed. Gate passed.
  • quality_gate_logs, bounds check memory_usage: 10/10 replicas passed. Gate passed.

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/merge

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dd-devflow bot commented Dec 11, 2024

Devflow running: /merge

View all feedbacks in Devflow UI.


2024-12-11 14:52:43 UTC ℹ️ MergeQueue: pull request added to the queue

The median merge time in main is 24m.


2024-12-11 16:33:00 UTC ℹ️ MergeQueue: This merge request was merged

@dd-mergequeue dd-mergequeue bot merged commit ab1dbf4 into main Dec 11, 2024
212 checks passed
@dd-mergequeue dd-mergequeue bot deleted the guillermo.julian/fix-ebpf-complexity-improvements branch December 11, 2024 16:32
@github-actions github-actions bot added this to the 7.62.0 milestone Dec 11, 2024
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