Spawn the sidecar via linker instead of trampoline by bwoebi · Pull Request #3869 · DataDog/dd-trace-php

bwoebi · 2026-05-08T17:20:01Z

Alternative to #3711 and #3713

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datadog-datadog-prod-us1 · 2026-05-08T17:55:16Z

🎉 All green!

❄️ No new flaky tests detected
🧪 All tests passed

🎯 Code Coverage (details)
• Patch Coverage: 100.00%
• Overall Coverage: 60.67% (-0.05%)

_{This comment will be updated automatically if new data arrives.

🔗 Commit SHA: 2d856bd | Docs | Datadog PR Page | Give us feedback!}

Signed-off-by: Bob Weinand <[email protected]>

Leiyks · 2026-05-13T15:26:32Z


 // Let time to write the telemetry log
-usleep(10000);
+usleep(300000);


Is this normal ? Why such a bump in value is needed

I think some occasional recent loader test flakiness from that. We have other tests, which also have 300ms here, and which do actually not flake.

Ultimately, this test waits on the sidecar to fully initialize and submit this telemetry. This isn't strictly related to this PR.

Signed-off-by: Bob Weinand <[email protected]>

pr-commenter · 2026-05-13T21:18:51Z

Benchmarks [ tracer ]

Benchmark execution time: 2026-05-13 21:16:55

Comparing candidate commit 2d856bd in PR branch bob/direct-exec with baseline commit 7bb186d in branch master.

Found 2 performance improvements and 20 performance regressions! Performance is the same for 161 metrics, 11 unstable metrics.

scenario:ContextPropagationBench/benchInject64Bit-opcache

🟥 execution_time [+9.653µs; +9.929µs] or [+74.075%; +76.198%]

scenario:HookBench/benchHookOverheadTraceMethod-opcache

🟥 execution_time [+6.900µs; +10.389µs] or [+4.049%; +6.097%]

scenario:MessagePackSerializationBench/benchMessagePackSerialization

🟩 execution_time [-5.450µs; -2.910µs] or [-5.159%; -2.754%]

scenario:MessagePackSerializationBench/benchMessagePackSerialization-opcache

🟩 execution_time [-7.041µs; -5.919µs] or [-6.534%; -5.493%]

scenario:PDOBench/benchPDOOverhead

🟥 execution_time [+8.837µs; +12.090µs] or [+3.556%; +4.865%]

scenario:PDOBench/benchPDOOverhead-opcache

🟥 execution_time [+11.544µs; +12.955µs] or [+4.698%; +5.273%]

scenario:PDOBench/benchPDOOverheadWithDBM

🟥 execution_time [+8.987µs; +11.582µs] or [+3.625%; +4.671%]

scenario:PDOBench/benchPDOOverheadWithDBM-opcache

🟥 execution_time [+9.838µs; +12.240µs] or [+3.978%; +4.950%]

scenario:PHPRedisBench/benchRedisOverhead

🟥 execution_time [+42.137µs; +54.956µs] or [+4.357%; +5.682%]

scenario:PHPRedisBench/benchRedisOverhead-opcache

🟥 execution_time [+43.035µs; +55.577µs] or [+4.259%; +5.500%]

scenario:SamplingRuleMatchingBench/benchGlobMatching1

🟥 execution_time [+10.092µs; +10.321µs] or [+401.923%; +411.012%]

scenario:SamplingRuleMatchingBench/benchGlobMatching2

🟥 execution_time [+9.941µs; +10.138µs] or [+377.196%; +384.677%]

scenario:SamplingRuleMatchingBench/benchGlobMatching2-opcache

🟥 execution_time [+10.283µs; +10.491µs] or [+376.596%; +384.231%]

scenario:SamplingRuleMatchingBench/benchGlobMatching3

🟥 execution_time [+9.992µs; +10.253µs] or [+373.169%; +382.911%]

scenario:SamplingRuleMatchingBench/benchGlobMatching3-opcache

🟥 execution_time [+10.331µs; +10.568µs] or [+362.379%; +370.713%]

scenario:SamplingRuleMatchingBench/benchGlobMatching4

🟥 execution_time [+10.162µs; +10.374µs] or [+383.795%; +391.799%]

scenario:SpanBench/benchDatadogAPI

🟥 execution_time [+13.413µs; +14.741µs] or [+20.550%; +22.585%]

scenario:SpanBench/benchDatadogAPI-opcache

🟥 execution_time [+12.848µs; +14.340µs] or [+19.602%; +21.879%]

scenario:SpanBench/benchOpenTelemetryAPI

🟥 execution_time [+33.536µs; +44.155µs] or [+4.643%; +6.113%]

scenario:SpanBench/benchOpenTelemetryAPI-opcache

🟥 execution_time [+33.946µs; +42.250µs] or [+5.035%; +6.266%]

scenario:SpanBench/benchOpenTelemetryInteroperability

🟥 execution_time [+106.962µs; +110.184µs] or [+56.760%; +58.470%]

scenario:SpanBench/benchOpenTelemetryInteroperability-opcache

🟥 execution_time [+111.747µs; +115.129µs] or [+63.780%; +65.710%]

* Add direct exec capabilities of the sidecar via dynamic linker Signed-off-by: Bob Weinand <[email protected]> * Fix race condition Signed-off-by: Bob Weinand <[email protected]> * Fix race condition Signed-off-by: Bob Weinand <[email protected]> * DEBUG Signed-off-by: Bob Weinand <[email protected]> * Weaken on mac and linux Signed-off-by: Bob Weinand <[email protected]> * Remove mockgen Signed-off-by: Bob Weinand <[email protected]> * Dummy Signed-off-by: Bob Weinand <[email protected]> * Dummy Signed-off-by: Bob Weinand <[email protected]> * Fix test Signed-off-by: Bob Weinand <[email protected]> * Cleanup Signed-off-by: Bob Weinand <[email protected]> * Disable direct exec for benchmarks --------- Signed-off-by: Bob Weinand <[email protected]>

bwoebi requested review from a team as code owners May 8, 2026 17:20

chatgpt-codex-connector Bot reviewed May 8, 2026

View reviewed changes

Comment thread config.m4

Comment thread components-rs/php_sidecar_mockgen/src/bin/php_sidecar_mockgen.rs Outdated

bwoebi force-pushed the bob/direct-exec branch 3 times, most recently from 3a6adfc to f613be8 Compare May 8, 2026 17:48

bwoebi force-pushed the bob/direct-exec branch 18 times, most recently from 0ca8690 to 9677294 Compare May 10, 2026 01:25

bwoebi added 4 commits May 11, 2026 20:18

Add direct exec capabilities of the sidecar via dynamic linker

ec57d29

Signed-off-by: Bob Weinand <[email protected]>

Fix race condition

cae0a24

Signed-off-by: Bob Weinand <[email protected]>

Fix race condition

1b04239

Signed-off-by: Bob Weinand <[email protected]>

DEBUG

5034949

Signed-off-by: Bob Weinand <[email protected]>

Weaken on mac and linux

19e5208

Signed-off-by: Bob Weinand <[email protected]>

bwoebi force-pushed the bob/direct-exec branch from cd9023b to 5932697 Compare May 11, 2026 18:20

Remove mockgen

7b64c78

Signed-off-by: Bob Weinand <[email protected]>

bwoebi force-pushed the bob/direct-exec branch 3 times, most recently from 8a7b8f5 to 6ebbff3 Compare May 12, 2026 13:25

Dummy

a78b9fe

Signed-off-by: Bob Weinand <[email protected]>

bwoebi force-pushed the bob/direct-exec branch from 6ebbff3 to a78b9fe Compare May 12, 2026 13:52

Dummy

c0d82de

Signed-off-by: Bob Weinand <[email protected]>

bwoebi force-pushed the bob/direct-exec branch from 25689e8 to c0d82de Compare May 12, 2026 16:24

Fix test

1ab9bd1

Signed-off-by: Bob Weinand <[email protected]>

bwoebi force-pushed the bob/direct-exec branch 4 times, most recently from 8929d0c to 210eb54 Compare May 13, 2026 12:16

This was referenced May 13, 2026

ExecSolib strategy: make ddtrace.so directly executable #3711

Closed

Add standalone datadog-ipc-helper binary #3713

Closed

bwoebi force-pushed the bob/direct-exec branch from 210eb54 to ba76279 Compare May 13, 2026 12:33

Leiyks approved these changes May 13, 2026

View reviewed changes

Cleanup

0b346ad

Signed-off-by: Bob Weinand <[email protected]>

bwoebi force-pushed the bob/direct-exec branch from ba76279 to 0b346ad Compare May 13, 2026 17:01

Disable direct exec for benchmarks

2d856bd

bwoebi merged commit 9c22110 into master May 13, 2026
2115 of 2122 checks passed

bwoebi deleted the bob/direct-exec branch May 13, 2026 23:35

github-actions Bot added this to the 1.20.0 milestone May 13, 2026

automationforthepeople mentioned this pull request Jun 16, 2026

ddtrace 1.20.0: intermittent HTTP header loss under PHP-FPM (curl data race + rinit ordering) #3995

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Spawn the sidecar via linker instead of trampoline#3869

Spawn the sidecar via linker instead of trampoline#3869
bwoebi merged 11 commits into
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bob/direct-exec

bwoebi commented May 8, 2026

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datadog-datadog-prod-us1 Bot commented May 8, 2026 •

edited by datadog-datadog-prod-us1-2 Bot

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datadog-datadog-prod-us1 Bot commented May 8, 2026 • edited by datadog-datadog-prod-us1-2 Bot Loading Uh oh! There was an error while loading. Please reload this page.

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Benchmarks [ tracer ]

scenario:ContextPropagationBench/benchInject64Bit-opcache

scenario:HookBench/benchHookOverheadTraceMethod-opcache

scenario:MessagePackSerializationBench/benchMessagePackSerialization

scenario:MessagePackSerializationBench/benchMessagePackSerialization-opcache

scenario:PDOBench/benchPDOOverhead

scenario:PDOBench/benchPDOOverhead-opcache

scenario:PDOBench/benchPDOOverheadWithDBM

scenario:PDOBench/benchPDOOverheadWithDBM-opcache

scenario:PHPRedisBench/benchRedisOverhead

scenario:PHPRedisBench/benchRedisOverhead-opcache

scenario:SamplingRuleMatchingBench/benchGlobMatching1

scenario:SamplingRuleMatchingBench/benchGlobMatching2

scenario:SamplingRuleMatchingBench/benchGlobMatching2-opcache

scenario:SamplingRuleMatchingBench/benchGlobMatching3

scenario:SamplingRuleMatchingBench/benchGlobMatching3-opcache

scenario:SamplingRuleMatchingBench/benchGlobMatching4

scenario:SpanBench/benchDatadogAPI

scenario:SpanBench/benchDatadogAPI-opcache

scenario:SpanBench/benchOpenTelemetryAPI

scenario:SpanBench/benchOpenTelemetryAPI-opcache

scenario:SpanBench/benchOpenTelemetryInteroperability

scenario:SpanBench/benchOpenTelemetryInteroperability-opcache

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datadog-datadog-prod-us1 Bot commented May 8, 2026 •

edited by datadog-datadog-prod-us1-2 Bot

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