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SubjectRe: [PATCH 9/9] perf c2c report: Add cacheline address count column
On Fri, Mar 09, 2018 at 11:56:43AM -0300, Arnaldo Carvalho de Melo wrote:
> Em Fri, Mar 09, 2018 at 11:14:42AM +0100, Jiri Olsa escreveu:
> > Adding the 'PA cnt' column grouped under data cacheline address.
> >
> > It shows how many times the physical addresses changed for the
> > hist entry. It does not show the number of different physical
> > addresses for entry, because we don't store those. We only track
> > the number of times we got different address than we currently
> > hold, which is not expensive and gives similar info.
> >
> > $ perf c2c report --stdio
> >
> > # ----------- Cacheline ---------- Total Tot ----- LLC Load Hitm -----
> > # Index Address Node PA cnt records Hitm Total Lcl Rmt
> > # ..... .................. .... ...... ....... ....... ....... ....... .......
> > #
>
>
> I'm adding this to the docs, ack?

nope.. those fields are c2c report only.. hardcoded

I'm preparing a change to share c2c fields with the
general report.. should come with other perf mem
changes later

jirka

>
> diff --git a/tools/perf/Documentation/perf-report.txt b/tools/perf/Documentation/perf-report.txt
> index cba16d8a970e..f4a280428e28 100644
> --- a/tools/perf/Documentation/perf-report.txt
> +++ b/tools/perf/Documentation/perf-report.txt
> @@ -127,7 +127,7 @@ OPTIONS
>
> If the --mem-mode option is used, the following sort keys are also available
> (incompatible with --branch-stack):
> - symbol_daddr, dso_daddr, locked, tlb, mem, snoop, dcacheline.
> + symbol_daddr, dso_daddr, locked, tlb, mem, snoop, dcacheline, dcacheline_count.
>
> - symbol_daddr: name of data symbol being executed on at the time of sample
> - dso_daddr: name of library or module containing the data being executed
> @@ -137,6 +137,7 @@ OPTIONS
> - mem: type of memory access for the data at the time of the sample
> - snoop: type of snoop (if any) for the data at the time of the sample
> - dcacheline: the cacheline the data address is on at the time of the sample
> + - dcacheline_count: the number of physical addresses sampled for this dcacheline
> - phys_daddr: physical address of data being executed on at the time of sample
>
> And the default sort keys are changed to local_weight, mem, sym, dso,

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