Submit worker count. Do not route metrics thru ext

[cataphract]

Description

• Appsec helper submits per-service worker count
• This all the other existing telemetry metrics that the helper generates are now submitted directly to sidecar, rather than going through the extension.

See also DataDog/libdatadog#1400

[pr-commenter]

Benchmarks [ appsec ]

Benchmark execution time: 2026-01-23 18:50:40

Comparing candidate commit 41b2489 in PR branch glopes/sidecar-ffi-tel-metrics with baseline commit 4df27be in branch master.

Found 0 performance improvements and 0 performance regressions! Performance is the same for 12 metrics, 0 unstable metrics.

[datadog-datadog-prod-us1]

⚠️ Tests

✨ Fix all issues with Cursor

⚠️ Warnings

🧪 1024 Tests failed

    testSearchPhpBinaries from integration.DDTrace\Tests\Integration\PHPInstallerTest (Fix with Cursor)

testSimplePushAndProcess from laravel-58-test.DDTrace\Tests\Integrations\Laravel\V5_8\QueueTest (Datadog) (Fix with Cursor)

DDTrace\Tests\Integrations\Laravel\V5_8\QueueTest::testSimplePushAndProcess
Test code or tested code printed unexpected output: spanLinksTraceId: 6973d3b00000000076cdcb09be6972fd
tid: 6973d3b000000000
hexProcessTraceId: 76cdcb09be6972fd
hexProcessSpanId: ca03b2a838a44f1c
processTraceId: 8560721709410906877
processSpanId: 14556674856166117148

phpvfscomposer://tests/vendor/phpunit/phpunit/phpunit:106

testSimplePushAndProcess from laravel-8x-test.DDTrace\Tests\Integrations\Laravel\V8_x\QueueTest (Datadog) (Fix with Cursor)

DDTrace\Tests\Integrations\Laravel\V8_x\QueueTest::testSimplePushAndProcess
Test code or tested code printed unexpected output: spanLinksTraceId: 6973d3b900000000b73e114c4fd5545c
tid: 6973d3b900000000
hexProcessTraceId: b73e114c4fd5545c
hexProcessSpanId: 2d607c2ceb92e3c2
processTraceId: 13204010176951440476
processSpanId: 3269749861843657666

View all

ℹ️ Info

❄️ No new flaky tests detected

_{This comment will be updated automatically if new data arrives.
🔗 Commit SHA: 66f3a64 | Docs | Datadog PR Page | Was this helpful? Give us feedback!}

[codecov-commenter]

Codecov Report

❌ Patch coverage is 71.29630% with 62 lines in your changes missing coverage. Please review.
✅ Project coverage is 62.03%. Comparing base (4df27be) to head (41b2489).

Files with missing lines	Patch %	Lines
appsec/src/helper/service.cpp	65.34%	24 Missing and 11 partials ⚠️
appsec/src/helper/service.hpp	71.69%	10 Missing and 5 partials ⚠️
appsec/src/helper/client.cpp	75.00%	2 Missing and 3 partials ⚠️
appsec/src/helper/client.hpp	87.50%	2 Missing and 2 partials ⚠️
appsec/src/helper/sidecar_settings.hpp	0.00%	3 Missing ⚠️

❌ Your patch status has failed because the patch coverage (71.29%) is below the target coverage (90.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3530      +/-   ##
==========================================
+ Coverage   62.01%   62.03%   +0.01%     
==========================================
  Files         140      140              
  Lines       13312    13364      +52     
  Branches     1762     1756       -6     
==========================================
+ Hits         8256     8290      +34     
- Misses       4267     4275       +8     
- Partials      789      799      +10     

Files with missing lines	Coverage Δ
appsec/src/extension/commands/client_init.c	83.10% <ø> (+2.18%)	⬆️
appsec/src/extension/commands/request_shutdown.c	77.46% <100.00%> (+0.10%)	⬆️
appsec/src/extension/commands_helpers.c	69.23% <ø> (-1.58%)	⬇️
appsec/src/helper/engine.hpp	100.00% <100.00%> (ø)
appsec/src/helper/network/proto.hpp	93.22% <ø> (ø)
appsec/src/helper/telemetry.hpp	47.72% <ø> (ø)
appsec/src/helper/sidecar_settings.hpp	35.71% <0.00%> (-5.96%)	⬇️
appsec/src/helper/client.hpp	89.58% <87.50%> (-4.54%)	⬇️
appsec/src/helper/client.cpp	75.40% <75.00%> (-0.58%)	⬇️
appsec/src/helper/service.hpp	70.41% <71.69%> (+2.93%)	⬆️
... and 1 more

... and 3 files with indirect coverage changes

---

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[pr-commenter]

Benchmarks [ tracer ]

Benchmark execution time: 2026-01-23 20:49:37

Comparing candidate commit 66f3a64 in PR branch glopes/sidecar-ffi-tel-metrics with baseline commit 4df27be in branch master.

Found 0 performance improvements and 6 performance regressions! Performance is the same for 183 metrics, 5 unstable metrics.

scenario:MessagePackSerializationBench/benchMessagePackSerialization

• 🟥 execution_time [+6.086µs; +6.794µs] or [+6.042%; +6.746%]

scenario:MessagePackSerializationBench/benchMessagePackSerialization-opcache

• 🟥 execution_time [+7.854µs; +8.626µs] or [+7.952%; +8.733%]

scenario:SamplingRuleMatchingBench/benchRegexMatching1

• 🟥 execution_time [+95.302ns; +146.898ns] or [+8.262%; +12.735%]

scenario:SamplingRuleMatchingBench/benchRegexMatching2

• 🟥 execution_time [+99.310ns; +149.490ns] or [+8.633%; +12.995%]

scenario:SamplingRuleMatchingBench/benchRegexMatching3

• 🟥 execution_time [+69.256ns; +122.344ns] or [+5.848%; +10.331%]

scenario:SamplingRuleMatchingBench/benchRegexMatching4

• 🟥 execution_time [+88.157ns; +139.843ns] or [+7.645%; +12.127%]