linux-kernel - Re: [PATCH 1/8] Documentation, x86: Documentation for Intel Mem b/w allocation user interface

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Message-ID: <alpine.DEB.2.10.1701241409270.3301@vshiva-Udesk>
Date:   Tue, 24 Jan 2017 14:10:33 -0800 (PST)
From:   Shivappa Vikas <vikas.shivappa@...el.com>
To:     Thomas Gleixner <tglx@...utronix.de>
cc:     Shivappa Vikas <vikas.shivappa@...el.com>,
        Vikas Shivappa <vikas.shivappa@...ux.intel.com>,
        linux-kernel@...r.kernel.org, x86@...nel.org, hpa@...or.com,
        mingo@...nel.org, peterz@...radead.org, ravi.v.shankar@...el.com,
        tony.luck@...el.com, fenghua.yu@...el.com, h.peter.anvin@...el.com
Subject: Re: [PATCH 1/8] Documentation, x86: Documentation for Intel Mem b/w
 allocation user interface



On Mon, 23 Jan 2017, Thomas Gleixner wrote:

> On Mon, 23 Jan 2017, Shivappa Vikas wrote:
>> On Wed, 18 Jan 2017, Thomas Gleixner wrote:
>>> If it's going to stay, then Intel should be able to provide simple tables
>>> which give us the required information for a particular CPU model.
>>
>> By sample table - does this mean we can map a throttle value in non-linear
>> scale to its percentage ?
>
> Exactly. And that map should be provided by Intel simply because it's a
> royal pain in the neck if users have to map random power of 2 values to
> something useful. And of course every user has to do the same thing on
> their own. That'd be more than silly.

Ok. Right now we dont have this capability on any SKUs, so i will just do a call 
to say get_throttle_map() for non_linear scale and fail if there is a nonlinear 
scale and later we can update to API to actually return the map for SKUs that 
support it.

Thanks,
Vikas

>
> Thanks,
>
> 	tglx
>
>
>
>