linux-kernel - Re: [PATCH] x86/intel_rdt: Implement "update" mode when writing schemata file

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Date:   Fri, 31 Mar 2017 10:40:40 -0700 (PDT)
From:   Shivappa Vikas <vikas.shivappa@...el.com>
To:     Thomas Gleixner <tglx@...utronix.de>
cc:     "Luck, Tony" <tony.luck@...el.com>,
        Vikas Shivappa <vikas.shivappa@...el.com>,
        Fenghua Yu <fenghua.yu@...el.com>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86/intel_rdt: Implement "update" mode when writing
 schemata file



On Fri, 31 Mar 2017, Thomas Gleixner wrote:

> On Fri, 24 Mar 2017, Luck, Tony wrote:
>> +Reading/writing the schemata file
>> +---------------------------------
>> +Reading the schemata file will show the state of all resources
>> +on all domains. When writing you only need to specify those values
>> +which you wish to change.  E.g.
>> +
>> +# cat schemata
>> +L3DATA:0=fffff;1=fffff;2=fffff;3=fffff
>> +L3CODE:0=fffff;1=fffff;2=fffff;3=fffff
>> +# echo "L3DATA:2=3c0;" > schemata
>> +# cat schemata
>> +L3DATA:0=fffff;1=fffff;2=3c0;3=fffff
>> +L3CODE:0=fffff;1=fffff;2=fffff;3=fffff
>
> It would be nice if the output would cover the mask width, i.e:
>
> L3DATA:0=fffff;1=fffff;2=003c0;3=fffff
> L3CODE:0=fffff;1=fffff;2=fffff;3=fffff
>
> because that makes it tabular and simpler to read.

Will add this.

A sample with MBA:

   L3DATA:0=fffff;1=fffff;2=003c0;3=fffff
   L3CODE:0=fffff;1=fffff;2=fffff;3=fffff
       MB:0=   10;1=   20;2=  100;3=  100

Thanks,
Vikas

>
> Thanks,
>
> 	tglx
>