linux-kernel - [PATCH 0/3] perf_event: enable overflow interrupts on KNC

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Date:	Wed, 17 Oct 2012 13:02:03 -0400 (EDT)
From:	Vince Weaver <vincent.weaver@...ne.edu>
To:	linux-kernel@...r.kernel.org
cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	eranian@...il.com,
	"Meadows, Lawrence F" <lawrence.f.meadows@...el.com>,
	vincent.weaver@...ne.edu
Subject: [PATCH 0/3] perf_event: enable overflow interrupts on KNC

Hello

the following patchset enables overflow interrupts on Knights Corner,
the initial KNC PMU driver that was included in 3.7-rc1 did not
support this.

The first patch should be straightforward.
The second should be too, but it relates to a problem with the p6 PMU
    that I brought up in a separate thread.
The third patch copies code over from the perf_event_intel.c interrupt
    handler.  Unfortunately KNC and x86 architectural perfmon use
    different MSR numbers.  The proper fix might be to make this
    generic and have function vectors for the status/ack functions,
    but since they are inline and probably performance critical
    I took the easy way out and just duplicated the code.

Thanks,

Vince Weaver
vincent.weaver@...ne.edu
-- 
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int x){while(x>-1)printf("\033[4%dm  ",x%2*7),x-=2;}int main(){while(*O){for(x=
30;x--;)_=*O-48,X(_>>6?59:(_>>x%6)&1),x*=_<64,O+=!(x%6);X(5),X(0),puts("");}}
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