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perf script python: Add script to profile and resolve physical mem type

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There could be different types of memory in the system. E.g normal
System Memory, Persistent Memory. To understand how the workload maps to
those memories, it's important to know the I/O statistics of them.  Perf
can collect physical addresses, but those are raw data.  It still needs
extra work to resolve the physical addresses.  Provide a script to
facilitate the physical addresses resolving and I/O statistics.

Profile with MEM_INST_RETIRED.ALL_LOADS or MEM_UOPS_RETIRED.ALL_LOADS
event if any of them is available.

Look up the /proc/iomem and resolve the physical address.  Provide
memory type summary.

Here is an example output:

  # perf script report mem-phys-addr
  Event: mem_inst_retired.all_loads:P
  Memory type                                    count   percentage
  ----------------------------------------  -----------  -----------
  System RAM                                        74        53.2%
  Persistent Memory                                 55        39.6%
  N/A

  ---

Changes since V2:
 - Apply the new license rules.
 - Add comments for globals

Changes since V1:
 - Do not mix DLA and Load Latency. Do not compare the loads and stores.
   Only profile the loads.
 - Use event name to replace the RAW event

Signed-off-by: Kan Liang <Kan.liang@intel.com>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Philippe Ombredanne <pombredanne@nexb.com>
Cc: Stephane Eranian <eranian@google.com>
Link: https://lkml.kernel.org/r/1515099595-34770-1-git-send-email-kan.liang@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Kan Liang 2018-01-04 12:59:55 -08:00 • committed by Arnaldo Carvalho de Melo
parent dd8bd53ab8
commit 41013f0c09
4 changed files with 119 additions and 0 deletions
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19
tools/perf/scripts/python/bin/mem-phys-addr-record Normal file
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#!/bin/bash
#
# Profiling physical memory by all retired load instructions/uops event
# MEM_INST_RETIRED.ALL_LOADS or MEM_UOPS_RETIRED.ALL_LOADS
#
load=`perf list | grep mem_inst_retired.all_loads`
if [ -z "$load" ]; then
load=`perf list | grep mem_uops_retired.all_loads`
fi
if [ -z "$load" ]; then
echo "There is no event to count all retired load instructions/uops."
exit 1
fi
arg=$(echo $load | tr -d ' ')
arg="$arg:P"
perf record --phys-data -e $arg $@

3
tools/perf/scripts/python/bin/mem-phys-addr-report Normal file
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#!/bin/bash
# description: resolve physical address samples
perf script $@ -s "$PERF_EXEC_PATH"/scripts/python/mem-phys-addr.py