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Fix get_cpu_id() to return actual CPU core instead of hardcoded 0 #5

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Merged
cong-or merged 1 commit into from
Mar 18, 2026
Merged

Fix get_cpu_id() to return actual CPU core instead of hardcoded 0 #5

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8 changes: 3 additions & 5 deletions hud-ebpf/src/main.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -28,7 +28,7 @@
#![allow(unused_unsafe)]

use aya_ebpf::{
helpers::{bpf_get_current_pid_tgid, bpf_ktime_get_ns},
helpers::{bpf_get_current_pid_tgid, bpf_get_smp_processor_id, bpf_ktime_get_ns},
macros::{map, perf_event, tracepoint, uprobe},
maps::{HashMap, RingBuf, StackTrace},
programs::{PerfEventContext, ProbeContext, TracePointContext},
Expand Down Expand Up @@ -301,11 +301,9 @@ fn get_worker_id(tid: u32) -> u32 {
unsafe { TOKIO_WORKER_THREADS.get(&tid).map(|info| info.worker_id).unwrap_or(u32::MAX) }
}

// Helper: Get CPU ID (using aya's helper when available)
// Helper: Get CPU ID from the BPF helper
fn get_cpu_id() -> u32 {
// aya-ebpf doesn't expose bpf_get_smp_processor_id directly yet
// For now, return 0 (we can add this later with raw bpf call)
0
unsafe { bpf_get_smp_processor_id() }
}

/// CPU Sampling Profiler - Captures stack traces via perf_event
Expand Down
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