Re: [PATCH 9/9] perf c2c report: Add cacheline address count column
From: Arnaldo Carvalho de Melo
Date: Fri Mar 09 2018 - 09:56:56 EST
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?
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,