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Message-ID: <6d982d5a-5313-40ff-85b2-aeba5429a47b@amd.com>
Date: Tue, 16 Apr 2024 14:52:55 -0500
From: "Moger, Babu" <babu.moger@....com>
To: Peter Newman <peternewman@...gle.com>
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Subject: Re: [RFC PATCH v3 09/17] x86/resctrl: Introduce assign state for the
mon group
Hi Peter,
On 4/16/24 13:52, Peter Newman wrote:
> Hi Babu,
>
> On Thu, Mar 28, 2024 at 6:08 PM Babu Moger <babu.moger@....com> wrote:
>>
>> +/*
>> + * monitor group's state when ABMC is supported
>> + */
>> +#define ASSIGN_NONE 0
>> +#define ASSIGN_TOTAL BIT(0)
>> +#define ASSIGN_LOCAL BIT(1)
>
> We already have an enumeration for the monitoring events (i.e.,
> QOS_L3_MBM_TOTAL_EVENT_ID), which should already be suitable for
> maintaining a bitmap of which events have assigned monitors.
>
/*
* Event IDs, the values match those used to program IA32_QM_EVTSEL before
* reading IA32_QM_CTR on RDT systems.
*/
enum resctrl_event_id {
QOS_L3_OCCUP_EVENT_ID = 0x01,
QOS_L3_MBM_TOTAL_EVENT_ID = 0x02,
QOS_L3_MBM_LOCAL_EVENT_ID = 0x03,
};
I think you are referring to this definition. We need just one bit for
each event. The QOS_L3_MBM_LOCAL_EVENT_ID definition(both bit 0 and bit 1
set here) does not work for us here.
I can change the definition to something like this.
+#define ASSIGN_NONE 0
+#define ASSIGN_TOTAL BIT(QOS_L3_MBM_TOTAL_EVENT_ID)
+#define ASSIGN_LOCAL BIT(QOS_L3_MBM_LOCAL_EVENT_ID)
Is that what you meant?
--
Thanks
Babu Moger
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