linux-kernel - Re: [PATCH 1/2] perf/Power7: Save dcache

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Date:	Mon, 10 Jun 2013 14:48:48 -0700
From:	Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>
To:	Anshuman Khandual <khandual@...ux.vnet.ibm.com>
Cc:	mingo@...nel.org, Paul Mackerras <paulus@...ba.org>,
	linuxppc-dev@...abs.org, Anton Blanchard <anton@....ibm.com>,
	linux-kernel@...r.kernel.org, Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH 1/2] perf/Power7: Save dcache_src fields in sample record.

Anshuman Khandual [khandual@...ux.vnet.ibm.com] wrote:
| > The former approach seems less confusing and this patch uses that approach.
| > 
| 
| Yeah, the former approach is simpler and makes sense.

Ok. Seems to make sense at least on Power.

<snip>

| > + * We use the table, dcache_src_map, to map this value 1 to PERF_MEM_LVL_L3,
| > + * the arch-neutral representation of the L3 cache.
| > + *
| > + * Similarly, in case of marked data TLB miss, bits 14..17 of the MMCRA
| > + * indicate the load source of a marked DTLB  entry. dtlb_src_map[] gives
| > + * the mapping to the arch-neutral values of the TLB source.
| 
| 
| Where did you define dtlb_src_map[] ?

Ah, the comment belongs in another patch that I am working on. That patch
maps the PERF_MEM_TLB* flags to Power7.

Thanks for the comments.

Sukadev

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