Re: [RFC -tip] perf, x86: Add PERF_COUNT_HW_NMI_WATCHDOG event v2

From: Cyrill Gorcunov
Date: Tue Jun 21 2011 - 11:40:37 EST

On Tue, Jun 21, 2011 at 7:23 PM, Don Zickus <dzickus@xxxxxxxxxx> wrote:
> On Thu, Apr 28, 2011 at 07:37:25PM +0400, Cyrill Gorcunov wrote:
>> Due to restriction and specifics of Netburst PMU we need a separated
>> event for NMI watchdog. In particular every Netburst event consume not
>> just a counter and config register, but also an additional ESCR register.
>> Since ESCR registers are grouped upon counters (i.e. if ESCR is occupied
>> for some event there is no room for another event to enter the room until
>> it's released) we need to pick up "least" used ESCR (or most available)
>> for nmi-watchdog purpose -- MSR_P4_CRU_ESCR2/3 was chosen.
>> Note that on all other PMUs which support relocation of events between
>> counters this event is a simple alias for PERF_COUNT_HW_CPU_CYCLES.
> Cyril,
> What ever happened with this patch?
> Cheers,
> Don

Well, it's flowing around, I didn't get any more Ack's other than your. Since it
introduces kind of abi I presume more ack's would be welcome before it
(possibly) get merged.
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