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sched_ext: Add scx_bpf_now() for BPF scheduler

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scx_bpf_now() is added to the header files so the BPF scheduler
can use it.

Signed-off-by: Changwoo Min <changwoo@igalia.com>
Acked-by: Andrea Righi <arighi@nvidia.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Changwoo Min 2025-01-09 22:14:53 +09:00 • committed by Tejun Heo
parent 3a9910b590
commit 2e1ce39fde
2 changed files with 6 additions and 0 deletions
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1
tools/sched_ext/include/scx/common.bpf.h
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@ -76,6 +76,7 @@ bool scx_bpf_task_running(const struct task_struct *p) __ksym;
s32 scx_bpf_task_cpu(const struct task_struct *p) __ksym;
struct rq *scx_bpf_cpu_rq(s32 cpu) __ksym;
struct cgroup *scx_bpf_task_cgroup(struct task_struct *p) __ksym __weak;
u64 scx_bpf_now(void) __ksym __weak;
/*
* Use the following as @it__iter when calling scx_bpf_dsq_move[_vtime]() from

5
tools/sched_ext/include/scx/compat.bpf.h
View file

@ -125,6 +125,11 @@ bool scx_bpf_dispatch_vtime_from_dsq___compat(struct bpf_iter_scx_dsq *it__iter,
false; \
})
#define scx_bpf_now() \
(bpf_ksym_exists(scx_bpf_now) ? \
scx_bpf_now() : \
bpf_ktime_get_ns())
/*
* Define sched_ext_ops. This may be expanded to define multiple variants for
* backward compatibility. See compat.h::SCX_OPS_LOAD/ATTACH().