Add RT scheduling support for ring buffer reader goroutine#271
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Add RT scheduling support for ring buffer reader goroutine#271
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Add SchedPolicy and SchedPriority fields to RingBufferOptions that allow callers to request a realtime scheduling policy for the ring buffer reader goroutine's OS thread. When SchedPolicy is set, the reader goroutine pins itself to an OS thread via LockOSThread and calls sched_setattr(2) to apply the requested realtime policy and priority. On failure, the error is sent to ErrChan and the reader continues with default scheduling (graceful degradation). This reduces eBPF ring buffer event loss under heavy syscall load by giving the reader thread priority over normal workloads.
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What does this PR do?
Add
SchedPolicyandSchedPriorityfields toRingBufferOptionsthat allow callers to request a realtime scheduling policy for the ring buffer reader goroutine's OS thread.When
SchedPolicyis set, the reader goroutine pins itself to an OS thread viaLockOSThreadand callssched_setattr(2)to apply the requested realtime policy and priority. On failure, the error is sent to ErrChan and the reader continues with default scheduling (graceful degradation).Motivation
The goal is to allow experimenting with realtime scheduling as a way to address ring buffer event loss under heavy load.
Additional Notes
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