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SubjectRe: [PATCH 2/5] perf: generic intel uncore support
On 04/03/2012 10:29 PM, Peter Zijlstra wrote:
> On Tue, 2012-04-03 at 16:28 +0800, Yan, Zheng wrote:
>> On 04/03/2012 06:11 AM, Peter Zijlstra wrote:
>>> On Sun, 2012-04-01 at 11:11 +0800, Yan, Zheng wrote:
>>>>
>>>> Because using per-cpu allocation is inconvenience for PCI uncore device.
>>>
>>> What are those, where does one read about them and why?
>>>
>> PCI uncore device support was added by patch 4. If using per-cpu pointer,
>> we have to setup the per-cpu pointer after the PCI driver's probe function
>> recognizes the uncore device. It means we have to first add the PCI uncore
>> device to a list, then call a function on all cpus to scan the list, find
>> the right uncore device and setup the per-cpu pointer.
>
> Yeah, I saw that, but it was all completely lacking in where one can
> find actual detail on that stuff. What parts of the SDM do I read? Is
> there anything other than the SDM, etc..
>
The uncore performance monitoring guide:

http://www.intel.com/content/dam/www/public/us/en/documents/design-guides/xeon-e5-2600-uncore-guide.pdf

Regards
Yan, Zheng


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