From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andi Kleen <ak@linux.intel.com>
Subject: Re: event group without multiplexing
Date: Mon, 16 Nov 2015 16:39:37 -0800
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To: Vince Weaver <vincent.weaver@maine.edu>
Cc: linux-perf-users@vger.kernel.org, Michael Petlan <mpetlan@redhat.com>, Yuanfang Chen <cyfmxc@gmail.com>

On Thu, Nov 12, 2015 at 01:00:09PM -0500, Vince Weaver wrote:
> 
> ccing Andi Kleen as he's the one who introduced the Haswell constraint 
> code in 3a632cb229bfb18b6d09822cc842451ea46c013e so maybe he knows why
> it is contraining all L1D_PEND_MISS.* events rather than just 
> L1D_PEND_MISS.PENDING on IVB and BDW.

Yes it looks like Haswell could use the more limited constraint as Broadwell
or IvyBridge. I don't remember why it ended up this way.
Please submit a patch.

-Andi