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git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2025-09-04 20:19:47 +08:00
d78e20c081
Previously system RAM and persistent memory were hard code matched,
change so that the label of the memory region is just read from
/proc/iomem. This avoids frequent N/A samples.
Change the /proc/iomem reading, event processing and output so that
nested entries appear and their counts count toward their parent. As
labels may be repeated, include the memory ranges in the output to make
it clear why, for example, "System RAM" appears twice.
Before:
Event: mem_inst_retired.all_loads:P
Memory type count percentage
---------------------------------------- ---------- ----------
System RAM 9460 96.5%
N/A 998 3.5%
After:
Event: mem_inst_retired.all_loads:P
Memory type count percentage
---------------------------------------- ---------- ----------
100000000-105f7fffff : System RAM 36741 96.5
841400000-8416599ff : Kernel data 89 0.2
840800000-8412a6fff : Kernel rodata 60 0.2
841ebe000-8423fffff : Kernel bss 34 0.1
0-fff : Reserved 1345 3.5
100000-89dd9fff : System RAM 2 0.0
Before:
Event: mem_inst_retired.any:P
Memory type count percentage
---------------------------------------- ----------- -----------
System RAM 9460 90.5%
N/A 998 9.5%
After:
Event: mem_inst_retired.any:P
Memory type count percentage
---------------------------------------- ---------- ----------
100000000-105f7fffff : System RAM 9460 90.5
841400000-8416599ff : Kernel data 45 0.4
840800000-8412a6fff : Kernel rodata 19 0.2
841ebe000-8423fffff : Kernel bss 12 0.1
0-fff : Reserved 998 9.5
The code has been updated to python 3 with type hints and resolving
issues reported by mypy and pylint. Tabs are swapped to spaces as
preferred in PEP8, because most lines of code were modified (of this
small file) and this makes pylint significantly less noisy.
Committer testing:
root@number:/tmp# grep -m1 "model name" /proc/cpuinfo
model name : Intel(R) Core(TM) i7-14700K
root@number:/tmp#
root@number:/tmp# perf script mem-phys-addr -a find /
/bin
/lib
/lib64
/sbin
Warning:
744 out of order events recorded.
Event: cpu_core/mem_inst_retired.all_loads/P
Memory type count percentage
---------------------------------------- ---------- ----------
100000000-8bfbfffff : System RAM 364561 76.5
621400000-6223a6fff : Kernel rodata 10474 2.2
622400000-62283d4bf : Kernel data 4828 1.0
623304000-6237fffff : Kernel bss 1063 0.2
620000000-6213fffff : Kernel code 98 0.0
0-fff : Reserved 111480 23.4
100000-2b0ca017 : System RAM 337 0.1
2fbad000-30d92fff : System RAM 44 0.0
2c79d000-2fbabfff : System RAM 30 0.0
30d94000-316d5fff : System RAM 16 0.0
2b131a58-2c71dfff : System RAM 7 0.0
root@number:/tmp#
Signed-off-by: Ian Rogers <irogers@google.com>
Acked-by: Kan Liang <kan.liang@linux.intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20241119180130.19160-1-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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|---|---|---|
| .. | ||
| bin | ||
| Perf-Trace-Util | ||
| arm-cs-trace-disasm.py | ||
| check-perf-trace.py | ||
| compaction-times.py | ||
| event_analyzing_sample.py | ||
| export-to-postgresql.py | ||
| export-to-sqlite.py | ||
| exported-sql-viewer.py | ||
| failed-syscalls-by-pid.py | ||
| flamegraph.py | ||
| futex-contention.py | ||
| gecko.py | ||
| intel-pt-events.py | ||
| libxed.py | ||
| mem-phys-addr.py | ||
| net_dropmonitor.py | ||
| netdev-times.py | ||
| parallel-perf.py | ||
| powerpc-hcalls.py | ||
| sched-migration.py | ||
| sctop.py | ||
| stackcollapse.py | ||
| stat-cpi.py | ||
| syscall-counts-by-pid.py | ||
| syscall-counts.py | ||
| task-analyzer.py | ||