On 5/15/2025 6:48 AM, Sean Christopherson wrote:
> On Mon, Mar 24, 2025, Mingwei Zhang wrote:
>> +/*
>> + * Currently invoked at VM creation to
>> + * - Check whether there are existing !exclude_guest events of PMU with
>> + * PERF_PMU_CAP_MEDIATED_VPMU
>> + * - Set nr_mediated_pmu_vms to preve
On Mon, Mar 24, 2025, Mingwei Zhang wrote:
> +/*
> + * Currently invoked at VM creation to
> + * - Check whether there are existing !exclude_guest events of PMU with
> + * PERF_PMU_CAP_MEDIATED_VPMU
> + * - Set nr_mediated_pmu_vms to prevent !exclude_guest event creation on
> + * PMUs with PERF
From: Kan Liang
Currently, the guest and host share the PMU resources when a guest is
running. KVM has to create an extra virtual event to simulate the
guest's event, which brings several issues, e.g., high overhead, not
accuracy and etc.
A new mediated PMU method is proposed to address the issu
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