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Port mem-phys-addr.py to a standalone script in tools/perf/python/
using the perf.session API to read perf.data files and profile physical
memory access types against /proc/iomem.
Improvements compared to the legacy script:
- Parse the full indentation hierarchy of /proc/iomem into a parent-child
tree of frozen IomemEntry dataclasses (instead of only top-level
indent-0 ranges), resolving physical addresses to the most specific
sub-range (such as Kernel code/data/bss inside System RAM) and rolling
child counts up into parent totals.
- Support profiling multiple memory events in a single perf.data session
(keyed by evsel name) instead of assuming a single global event.
- Add argparse CLI options (-i/--input and --iomem to allow supplying an
offline /proc/iomem snapshot from a target system).
Add a shell test (test_mem_phys_addr_python.sh) to verify the standalone
script.
Assisted-by: Antigravity:gemini-3.1-pro
Signed-off-by: Ian Rogers <irogers@google.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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