core, opentelemetry: Implement Attempt-Level RPC Delay Observability (Proposal A121) - #12807

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AgraVator merged 26 commits into

grpc:masterfrom

AgraVator:lb-policy-delay

Jul 27, 2026

Commits on May 13, 2026

core,api,xds: Implement load balancing policy delay plumbing
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committed

Commits on May 14, 2026

fix: tests
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Commits on May 19, 2026

fix: minor changes
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Commits on Jun 8, 2026

add missing endDelay()
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Commits on Jun 19, 2026

core,api,rls,util,xds: Implement dual Load Balancer delay APIs and cadence invariants
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core: Add 100% test coverage for dual LB delay APIs and cadence rules
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Commits on Jun 22, 2026

Commits on Jun 23, 2026

Commits on Jun 24, 2026

Commits on Jun 29, 2026

core, xds: Populate explicit attempt delay annotations in initial pickers (Proposal A121)
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Commits on Jul 6, 2026

Fix thread-safety in DelayedClientTransport and remove Thread.sleep in E2E delay tests
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Commits on Jul 13, 2026

Address review comments on PR #12807: inline CONNECTING_RESULT in RoundRobinLoadBalancer and refine PendingStream delay telemetry synchronization
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Commits on Jul 14, 2026

Simplify setStreamAndEndDelay in DelayedClientTransport per review comment
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