Re: [PATCH sched_ext/for-6.15] sched_ext: idle: Introduce node-aware idle cpu kfunc helpers
From: Tejun Heo
Date: Tue Feb 18 2025 - 14:02:05 EST
On Tue, Feb 18, 2025 at 07:04:41PM +0100, Andrea Righi wrote:
> Introduce a new kfunc to retrieve the node associated to a CPU:
>
> int scx_bpf_cpu_node(s32 cpu)
>
> Add the following kfuncs to provide BPF schedulers direct access to
> per-node idle cpumasks information:
>
> const struct cpumask *scx_bpf_get_idle_cpumask_node(int node)
> const struct cpumask *scx_bpf_get_idle_smtmask_node(int node)
> s32 scx_bpf_pick_idle_cpu_node(const cpumask_t *cpus_allowed,
> int node, u64 flags)
> s32 scx_bpf_pick_any_cpu_node(const cpumask_t *cpus_allowed,
> int node, u64 flags)
>
> Moreover, trigger an scx error when any of the non-node aware idle CPU
> kfuncs are used when SCX_OPS_BUILTIN_IDLE_PER_NODE is enabled.
>
> Cc: Yury Norov [NVIDIA] <yury.norov@xxxxxxxxx>
> Signed-off-by: Andrea Righi <arighi@xxxxxxxxxx>
Applied to sched_ext/for-6.15.
Thanks.
--
tejun