linux-kernel - Re: [PATCH v2 4/4] perf/x86/uncore: modularize Intel uncore driver

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Message-ID: <535A6070.90803@intel.com>
Date:	Fri, 25 Apr 2014 21:17:36 +0800
From:	"Yan, Zheng" <zheng.z.yan@...el.com>
To:	Peter Zijlstra <peterz@...radead.org>,
	Stephane Eranian <eranian@...gle.com>
CC:	Ingo Molnar <mingo@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	Andi Kleen <andi@...stfloor.org>
Subject: Re: [PATCH v2 4/4] perf/x86/uncore: modularize Intel uncore driver

On 04/24/2014 07:27 PM, Peter Zijlstra wrote:
> On Thu, Apr 24, 2014 at 12:36:01PM +0200, Stephane Eranian wrote:
>>> Most of hardware specific codes in the Intel uncore driver are for
>>> SandyBridge/IvyBridge/Haswell. Uncore subsystem in these CPUs are
>>> similar. One module per CPU type means we have to duplicate lots of
>>> code. I don't think it's a good idea.
>>>
>> Then, at least split nhm_ex from the rest. It is very big.
> 
> Aren't the EX parts in general far more complex and different from the
> EP parts? Or will the SNB/IVB/HSW-EX parts also be similar again? (this
> would be a good thing).

SNB/IVB/HSW-EX are almost identical to SNB/IVB/HSW-EP. NHM/WSM-EX are complete
different from SNB/IVB/HSW-EX

Regards
Yan, Zheng


> 
> But yes, it makes sense to at least split the EP and EX parts, and split
> where the families are different.
> 

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