scx_bpf_now
BTF_ID_FLAGS(func, scx_bpf_now)
u64 scx_bpf_now(void) __ksym __weak;
(bpf_ksym_exists(scx_bpf_now) ? \
scx_bpf_now() : \
*started_at = scx_bpf_now() ?: 1; /* 0 indicates idle */
u64 now = scx_bpf_now();
u64 now = scx_bpf_now();
u64 now = scx_bpf_now();