Re: [PATCH v5 12/12] Documentation/x86: Update resctrl_ui.rst for new features

From: Moger, Babu
Date: Mon Oct 03 2022 - 10:28:32 EST

Hi Reinette,

On 9/29/22 17:10, Reinette Chatre wrote:
> Hi Babu,
> In subject: resctrl_ui.rst -> resctrl.rst
> On 9/27/2022 1:27 PM, Babu Moger wrote:
>> Update the documentation for the new features:
>> 1. Slow Memory Bandwidth allocation (SMBA).
>> With this feature, the QOS enforcement policies can be applied
>> to the external slow memory connected to the host. QOS enforcement
>> is accomplished by assigning a Class Of Service (COS) to a processor
>> and specifying allocations or limits for that COS for each resource
>> to be allocated.
>> 2. Bandwidth Monitoring Event Configuration (BMEC).
>> The bandwidth monitoring events mbm_total_bytes and mbm_local_bytes
>> are set to count all the total and local reads/writes respectively.
>> With the introduction of slow memory, the two counters are not
>> enough to count all the different types are memory events. With the
> types are memory events -> types of memory events?
Ok Sure
>> feature BMEC, the users have the option to configure mbm_total_bytes
>> and mbm_local_bytes to count the specific type of events.
>> Also add configuration instructions with examples.
>> Signed-off-by: Babu Moger <babu.moger@xxxxxxx>
>> ---
> ...
>> +
>> +"mbm_total_config", "mbm_local_config":
>> + These files contain the current event configuration for the events
>> + mbm_total_bytes and mbm_local_bytes, respectively, when the
>> + Bandwidth Monitoring Event Configuration (BMEC) feature is supported.
>> + The event configuration settings are domain specific. Changing the
>> + configuration on one CPU in a domain would affect the whole domain.
> This contradicts the implementation done in this series where the
> configuration is changed on every CPU in the domain.

How about this?

The event configuration settings are domain specific and will affect all the CPUs in the domain.