linux-kernel - Re: [PATCH V5 0/13] perf: Intel uncore pmu counting support

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Message-ID: <4FEA6B3D.9010905@intel.com>
Date:	Wed, 27 Jun 2012 10:09:01 +0800
From:	"Yan, Zheng" <zheng.z.yan@...el.com>
To:	Stephane Eranian <eranian@...gle.com>
CC:	Peter Zijlstra <a.p.zijlstra@...llo.nl>, mingo@...e.hu,
	jolsa@...hat.com, andi@...stfloor.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH V5 0/13] perf: Intel uncore pmu counting support

On 06/27/2012 09:05 AM, Stephane Eranian wrote:
> Hi,
> 
> If you compile the uncore support in 32-bit mode, you will
> get a warning on the hrtimer_start_range_ns() functions
> because the interval is passed as ktime_t whereas the
> function expects unsigned long.  With 64-bit, no problem
> ktime_t is a union with s64. But in 32-bit mode, there is
> a possible truncation of the delta. This needs to be
> fixed.
> 
thank you for mention. but I think someone has already submitted a patch.

Yan, Zheng

> On Thu, Jun 14, 2012 at 7:41 AM, Stephane Eranian <eranian@...gle.com> wrote:
>> On Thu, Jun 14, 2012 at 4:18 AM, Yan, Zheng <zheng.z.yan@...el.com> wrote:
>>> On 06/13/2012 05:02 PM, Peter Zijlstra wrote:
>>>> On Wed, 2012-06-13 at 09:41 +0800, Yan, Zheng wrote:
>>>>> Peter suggests keeping the uncore names as they're listed in the intel
>>>>> doc. For Sandybirdge-EP, uncore names are something like: Cbo, iMC,
>>>>> QPI.
>>>>
>>>> No they're not, they're C-Box etc.. but I'm fine with doing a tolower on
>>>> all of it.
>>>>
>>>
>>> The reason I choose CBox instead of C-Box is that '-' is a separate symbol
>>> in the flex rules. '-' is used for matching events such as LLC-load-misses.
>>> I don't know how to allow letter '-' in the pmu name, but without leading
>>> to ambiguity.
>>>
>> I would drop the -, just call it cbox.


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