linux-kernel - RE: [RFC PATCH v2 0/5] Add hardware prefetch driver for A64FX and Intel processors

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Message-ID: <OSBPR01MB20375EEEA0B9EFBD3FAF853180919@OSBPR01MB2037.jpnprd01.prod.outlook.com>
Date:   Mon, 8 Nov 2021 02:36:44 +0000
From:   "tarumizu.kohei@...itsu.com" <tarumizu.kohei@...itsu.com>
To:     'Peter Zijlstra' <peterz@...radead.org>
CC:     "catalin.marinas@....com" <catalin.marinas@....com>,
        "will@...nel.org" <will@...nel.org>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "bp@...en8.de" <bp@...en8.de>,
        "dave.hansen@...ux.intel.com" <dave.hansen@...ux.intel.com>,
        "x86@...nel.org" <x86@...nel.org>, "hpa@...or.com" <hpa@...or.com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [RFC PATCH v2 0/5] Add hardware prefetch driver for A64FX and
 Intel processors

Hi,

Thanks for your comment.

> Here you talk about applications..

> Here you talk about CPUs..
> 
> How does that work?

Does your question mean how users tune their applications? We intend
to use it as follows:
1.) User tunes the hardware prefetch parameters of a particular CPUs
    via sysfs interface.
2.) Execute the application bound to the specific CPUs set above.