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[NPM] Fix propagating DefaultKProbeMaxActive to CO-RE tracer

Open hmahmood opened this issue 11 months ago • 2 comments

What does this PR do?

Fix passing DefaultKProbeMaxActive while loading CO-RE tracer. We moved over to using this option in https://github.com/DataDog/datadog-agent/commit/6da3631fafae36180a71e98bb5803122e950c5e4, but did not fix this code, resulting in max active actually not being set on the kretprobes when CO-RE is used.

Motivation

Additional Notes

Possible Drawbacks / Trade-offs

Describe how to test/QA your changes

hmahmood avatar Mar 14 '24 20:03 hmahmood

Test changes on VM

Use this command from test-infra-definitions to manually test this PR changes on a VM:

inv create-vm --pipeline-id=30149022 --os-family=ubuntu

pr-commenter[bot] avatar Mar 14 '24 22:03 pr-commenter[bot]

Regression Detector

Regression Detector Results

Run ID: 9084403a-38c7-4187-9c2c-10338e84b5d4 Baseline: 3eb84063ab03066086a6578f9302aecb56598ff2 Comparison: b333e2753ce270c8d9d0ed01551cb2775dc6b065

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.

Experiments ignored for regressions

Regressions in experiments with settings containing erratic: true are ignored.

perf experiment goal Δ mean % Δ mean % CI
file_to_blackhole % cpu utilization -0.67 [-7.02, +5.68]

Fine details of change detection per experiment

perf experiment goal Δ mean % Δ mean % CI
tcp_syslog_to_blackhole ingress throughput +1.35 [+1.25, +1.45]
file_tree memory utilization +0.98 [+0.89, +1.06]
idle memory utilization +0.27 [+0.23, +0.31]
basic_py_check % cpu utilization +0.16 [-2.37, +2.68]
process_agent_standard_check_with_stats memory utilization +0.10 [+0.07, +0.13]
uds_dogstatsd_to_api ingress throughput +0.05 [-0.16, +0.26]
trace_agent_msgpack ingress throughput +0.02 [+0.01, +0.03]
trace_agent_json ingress throughput -0.01 [-0.03, +0.02]
tcp_dd_logs_filter_exclude ingress throughput -0.01 [-0.03, +0.01]
process_agent_standard_check memory utilization -0.04 [-0.07, +0.00]
process_agent_real_time_mode memory utilization -0.06 [-0.09, -0.02]
otel_to_otel_logs ingress throughput -0.19 [-0.61, +0.23]
file_to_blackhole % cpu utilization -0.67 [-7.02, +5.68]
pycheck_1000_100byte_tags % cpu utilization -1.44 [-6.32, +3.45]
uds_dogstatsd_to_api_cpu % cpu utilization -1.60 [-4.29, +1.08]

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".

pr-commenter[bot] avatar Mar 14 '24 22:03 pr-commenter[bot]

/merge

hmahmood avatar Mar 18 '24 15:03 hmahmood

:steam_locomotive: MergeQueue

Pull request added to the queue.

This build is going to start soon! (estimated merge in less than 28m)

Use /merge -c to cancel this operation!

dd-devflow[bot] avatar Mar 18 '24 15:03 dd-devflow[bot]