Re: [PATCH v3 15/21] sched/cache: Disable cache aware scheduling for processes with high thread counts

[Peter Zijlstra]

On Tue, Feb 10, 2026 at 02:18:55PM -0800, Tim Chen wrote:

> +static bool exceed_llc_nr(struct mm_struct *mm, int cpu)
> +{
> +	int smt_nr = 1;
> +
> +#ifdef CONFIG_SCHED_SMT
> +	if (sched_smt_active())
> +		smt_nr = cpumask_weight(cpu_smt_mask(cpu));

cpu_smt_num_threads ?

> +#endif
> +
> +	return !fits_capacity((mm->sc_stat.nr_running_avg * smt_nr),
> +			per_cpu(sd_llc_size, cpu));
> +}