experiment(agent-data-plane): use sampled allocator for DDA host profiler

[tobz]

Summary

Work in progress.

Change Type

• Bug fix
• New feature
• Non-functional (chore, refactoring, docs)
• Performance

How did you test this PR?

References

[pr-commenter]

Regression Detector (Agent Data Plane)

Run ID: 0ef06adc-3186-4fed-ba2f-c37dabb690f3
Baseline: 2715682b · Comparison: d3da6271 · diff

Optimization Goals: ✅ No significant changes detected

Fine details of change detection per experiment (5)

Experiments configured erratic: true are tagged (ignored) and skipped when determining which experiments regressed or improved. Experiments which are detected as erratic at runtime are tagged (erratic) to flag that the run's sample dispersion was high, but their regression / improvement signal still counts.

experiment	goal	Δ mean %	links
quality_gates_rss_dsd_heavy	memory	⚪ -0.10	metrics profiles logs
quality_gates_rss_dsd_ultraheavy	memory	⚪ -0.17	metrics profiles logs
quality_gates_rss_dsd_low	memory	⚪ -0.40	metrics profiles logs
quality_gates_rss_dsd_medium	memory	⚪ -0.42	metrics profiles logs
quality_gates_rss_idle	memory	⚪ -0.97	metrics profiles logs

Bounds Checks: ✅ Passed (5)

experiment	check	replicates	observed	links
quality_gates_rss_dsd_heavy	memory_usage	10/10	✅ 133 MiB ≤ 140 MiB	metrics profiles logs
quality_gates_rss_dsd_low	memory_usage	10/10	✅ 42.9 MiB ≤ 50 MiB	metrics profiles logs
quality_gates_rss_dsd_medium	memory_usage	10/10	✅ 64.9 MiB ≤ 75 MiB	metrics profiles logs
quality_gates_rss_dsd_ultraheavy	memory_usage	10/10	✅ 191 MiB ≤ 200 MiB	metrics profiles logs
quality_gates_rss_idle	memory_usage	10/10	✅ 28.7 MiB ≤ 40 MiB	metrics profiles logs

Explanation

A change is flagged as a regression when |Δ mean %| > 5.00% in the regressing direction for its optimization goal AND SMP marks the experiment as a regression (is_regression: true). Improvements use the matching criteria for the improving direction. Experiments configured erratic: true (tagged (ignored)) are skipped outright; experiments detected as erratic at runtime (tagged (erratic)) still count, since that flag describes sample dispersion rather than directional certainty. The Δ mean % cell is colored accordingly: 🟢 = improvement, 🔴 = regression, ⚪ = neutral. Reduction in CPU or memory is an improvement; reduction in ingress throughput is a regression.

[pr-commenter]

Binary Size Analysis (Agent Data Plane)

Baseline: 2715682 · Comparison: d3da627 · diff
Analysis Configuration: stripped binaries · Pass/Fail Threshold: +5%
Sizes: 41.54 MiB (baseline) vs 41.43 MiB (comparison)
Size Change: -112.73 KiB (-0.27%)

✅ Binary size difference within threshold

Changes by Module

Module	File Size	Symbols
core	+308.36 KiB	8460
alloc	-183.04 KiB	2620
prost	+85.13 KiB	212
tokio	-51.00 KiB	1645
anyhow	-35.26 KiB	760
tonic	-18.28 KiB	374
chumsky	+18.11 KiB	41
axum	-17.98 KiB	279
figment	-15.59 KiB	276
tower	-14.73 KiB	219
rustls	-14.01 KiB	319
std	-13.50 KiB	269
http	-13.17 KiB	218
futures_channel	-12.55 KiB	99
aho_corasick	-8.56 KiB	44
crossbeam_channel	-7.83 KiB	84
saluki_components::encoders::datadog	-7.53 KiB	57
tracing	+6.23 KiB	54
http_body_util	+5.91 KiB	120
hyper_util	-5.77 KiB	70

Detailed Symbol Changes

    FILE SIZE        VM SIZE    
 --------------  -------------- 
  [NEW] +41.6Ki  [NEW] +41.4Ki    agent_data_plane::cli::run::handle_run_command::_{{closure}}::hb7509bde1fe8c2a1
  [NEW] +30.1Ki  [NEW] +29.9Ki    agent_data_plane::cli::dogstatsd::handle_dogstatsd_command::_{{closure}}::ha2ef2e36578baf17
  [NEW] +28.9Ki  [NEW] +28.8Ki    agent_data_plane::cli::run::create_topology::_{{closure}}::h149ccbd3009029ea
  [NEW] +24.9Ki  [NEW] +24.7Ki    agent_data_plane::internal::remote_agent::run_remote_agent_registration_loop::_{{closure}}::he3f705104b8a28eb
  [NEW] +23.4Ki  [NEW] +23.1Ki    _<agent_data_plane::components::host_tags::HostTagsConfiguration as saluki_core::components::transforms::builder::SynchronousTransformBuilder>::build::_{{closure}}::hbab9aeb89d74ff12
  [NEW] +21.5Ki  [NEW] +21.4Ki    agent_data_plane::internal::env::ADPEnvironmentProvider::from_configuration::_{{closure}}::hdcba8d2d0ebd7cee
  [NEW] +21.0Ki  [NEW] +20.8Ki    agent_data_plane::cli::debug::handle_debug_command::_{{closure}}::hc988735afebb8d60
  [NEW] +19.6Ki  [NEW] +19.3Ki    datadog_agent_commons::ipc::client::RemoteAgentClient::from_client_configuration::_{{closure}}::_{{closure}}::_{{closure}}::h58fe162554f98ae5
  [NEW] +19.2Ki  [NEW] +19.1Ki    agent_data_plane::internal::env::workload::build_collector::_{{closure}}::h76a24940626e5069
  [NEW] +18.5Ki  [NEW] +18.4Ki    agent_data_plane::main::_{{closure}}::h9d1e42c39e847afd
  [DEL] -17.7Ki  [DEL] -17.6Ki    agent_data_plane::main::_{{closure}}::hecc5209da13e7b3b
  [DEL] -19.5Ki  [DEL] -19.4Ki    agent_data_plane::internal::env::workload::build_collector::_{{closure}}::h68269a7c75296660
  [DEL] -19.6Ki  [DEL] -19.4Ki    datadog_agent_commons::ipc::client::RemoteAgentClient::from_client_configuration::_{{closure}}::_{{closure}}::_{{closure}}::hfe5418ff83bea119
  [DEL] -21.1Ki  [DEL] -20.9Ki    agent_data_plane::internal::env::ADPEnvironmentProvider::from_configuration::_{{closure}}::h2a4d118040535a27
  [DEL] -21.1Ki  [DEL] -21.0Ki    agent_data_plane::cli::debug::handle_debug_command::_{{closure}}::h52186509e2e9628d
  [DEL] -23.0Ki  [DEL] -22.8Ki    _<agent_data_plane::components::host_tags::HostTagsConfiguration as saluki_core::components::transforms::builder::SynchronousTransformBuilder>::build::_{{closure}}::h7d89934f63b89648
  [DEL] -24.8Ki  [DEL] -24.6Ki    agent_data_plane::internal::remote_agent::run_remote_agent_registration_loop::_{{closure}}::hf458fedae78eed58
  [DEL] -28.0Ki  [DEL] -27.9Ki    agent_data_plane::cli::run::create_topology::_{{closure}}::hb59d6631923a902b
  [DEL] -30.0Ki  [DEL] -29.9Ki    agent_data_plane::cli::dogstatsd::handle_dogstatsd_command::_{{closure}}::hf69bf5e5176a850d
  [DEL] -41.4Ki  [DEL] -41.2Ki    agent_data_plane::cli::run::handle_run_command::_{{closure}}::h244a74d1ea5c869f
  -0.5%  -114Ki  -0.3% -44.2Ki    [24388 Others]
  -0.3%  -112Ki  -0.1% -42.0Ki    TOTAL