linux-kernel - Re: [PATCH V2 20/25] perf/x86/intel: Add Alder Lake Hybrid support

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Message-ID: <20210311214315.GN4746@worktop.programming.kicks-ass.net>
Date:   Thu, 11 Mar 2021 22:43:15 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     "Luck, Tony" <tony.luck@...el.com>
Cc:     "Liang, Kan" <kan.liang@...ux.intel.com>,
        Andi Kleen <ak@...ux.intel.com>,
        "mingo@...nel.org" <mingo@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "acme@...nel.org" <acme@...nel.org>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "bp@...en8.de" <bp@...en8.de>,
        "namhyung@...nel.org" <namhyung@...nel.org>,
        "jolsa@...hat.com" <jolsa@...hat.com>,
        "yao.jin@...ux.intel.com" <yao.jin@...ux.intel.com>,
        "alexander.shishkin@...ux.intel.com" 
        <alexander.shishkin@...ux.intel.com>,
        "Hunter, Adrian" <adrian.hunter@...el.com>,
        Mark Rutland <mark.rutland@....com>,
        Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>
Subject: Re: [PATCH V2 20/25] perf/x86/intel: Add Alder Lake Hybrid support

On Thu, Mar 11, 2021 at 09:09:57PM +0000, Luck, Tony wrote:
> >> I think the "sapphire_rapids" is the code name for the server platform.
> >
> > If that's really the case, then:
> >
> > #define INTEL_FAM6_SAPPHIRERAPIDS_X     0x8F
> >
> > is wrong, those things should be uarch name, not platform name. Tony?
> 
> 0x8F is the model number of the CPU that is named Sapphire Rapids that
> goes into the Eagle Stream platform
> 
> If you want a uarch name, that might be the name of the core
> (.... something-cove ... I can't keep track of the names of all the
> coves).

uarch names used to be different from that. But looking at wikipedia,
things have gone completely apeshit after skylake :-/

We used to have one microarch and then a laptop,desktop and server sku,
but now each of those has a separately named microarch, so where we had
one new name each year, we now have at least 3. No wonder I've no
sodding clue anymore.

/me stmps off to get a beer to forget all I've seen ...