Streamline bloat reports, part 2 of 2 (#33716)

* Streamline bloat reports, part 2

Remove the early attempt to aggregate FLASH vs RAM based on whether
ELF segments are writable or not, which turned out not to be useful
because several platforms mark flash segments as writable. Now that
explicit section groups are in use (#33642), there is no additional
value to segment aggregation even on platforms that mark them
accurately.

* Streamline bloat reports, part 2

Remove the early attempt to aggregate FLASH vs RAM based on whether
ELF segments are writable or not, which turned out not to be useful
because several platforms mark flash segments as writable. Now that
explicit section groups are in use (#33642), there is no additional
value to segment aggregation even on platforms that mark them
accurately.

* Filter down to region reports only.

scripts/tools/memory/gh_report.py

@@ -276,6 +276,10 @@ def report_matching_commits(self) -> Dict[str, pd.DataFrame]:
                 continue
 
             df = pd.DataFrame(changes.rows, columns=changes.columns)
+
+            # Filter down to region reports only.
+            df = df[df['kind'] == 'region'].drop('kind', axis=1)
+
             df.attrs = {
                 'name': f'{pr},{parent},{commit}',
                 'title': (f'PR #{pr}: ' if pr else '') +

scripts/tools/memory/gh_sizes.py

@@ -58,9 +58,9 @@
           {"section": ".data", "size": 1648},
           {"section": ".text", "size": 740236}
         ],
-        "wr": [
-          {"wr": 0, "size": 262144},
-          {"wr": 1, "size": 74023}
+        "region": [
+          {"region": "FLASH", "size": 262144},
+          {"region": "RAM", "size": 74023}
         ]
     }
   }
@@ -77,8 +77,7 @@
 import memdf.report
 import memdf.select
 import memdf.util
-import numpy as np  # type: ignore
-from memdf import Config, ConfigDescription, DFs, SectionDF, SegmentDF
+from memdf import Config, ConfigDescription, DFs, SectionDF
 
 PLATFORM_CONFIG_DIR = pathlib.Path('scripts/tools/memory/platform')
 
@@ -162,7 +161,8 @@ def main(argv):
             **CONFIG,
         }
         # In case there is no platform configuration file, default to using a popular set of section names.
-        config_desc['section.select']['default'] = ['.text', '.rodata', '.data', '.bss']
+        config_desc['section.select']['default'] = [
+            '.text', '.rodata', '.data', '.bss']
 
         config = Config().init(config_desc)
         config.put('output.file', output)
@@ -197,32 +197,17 @@ def main(argv):
 
         collected: DFs = memdf.collect.collect_files(config, [binary])
 
-        # Aggregate loaded segments, by writable (RAM) or not (flash).
-        segments = collected[SegmentDF.name]
-        segments['segment'] = segments.index
-        segments['wr'] = ((segments['flags'] & 2) != 0).convert_dtypes(
-            convert_boolean=False, convert_integer=True)
-        segment_summary = segments[segments['type'] == 'PT_LOAD'][[
-            'wr', 'size'
-        ]].groupby('wr').aggregate(np.sum).reset_index().astype(
-            {'size': np.int64})
-        segment_summary.attrs['name'] = "wr"
-
         sections = collected[SectionDF.name]
-        sections = sections.join(on='segment',
-                                 how='left',
-                                 other=segments,
-                                 rsuffix='-segment')
-        section_summary = sections[['section', 'size',
-                                    'wr']].sort_values(by='section')
+        section_summary = sections[['section',
+                                    'size']].sort_values(by='section')
         section_summary.attrs['name'] = "section"
 
-        region_summary = memdf.select.groupby(config, collected['section'], 'region')
+        region_summary = memdf.select.groupby(
+            config, collected['section'], 'region')
         region_summary.attrs['name'] = "region"
 
         summaries = {
             'section': section_summary,
-            'memory': segment_summary,
             'region': region_summary,
         }
 

scripts/tools/memory/memdf/sizedb.py

@@ -109,13 +109,6 @@ def add_sizes_from_json(self, s: Union[bytes, str], origin: Dict):
                     'size': i['size'],
                     'kind': frame
                 })
-        # Add segment sizes.
-        for i in r['frames'].get('wr', []):
-            r['sizes'].append({
-                'name': ('(read only)', '(read/write)')[int(i['wr'])],
-                'size': i['size'],
-                'kind': 'wr'
-            })
         self.add_sizes(**r)
 
     def add_sizes_from_zipfile(self, f: Union[IO, Path], origin: Dict):
@@ -182,6 +175,7 @@ def select_changes(self, parent: str, commit: str) -> ChangeInfo:
             pb.id AS parent_build,
             cb.id AS commit_build,
             t.platform, t.config, t.target,
+            cs.kind AS kind,
             cs.name AS name,
             ps.size AS parent_size,
             cs.size AS commit_size,
@@ -196,7 +190,7 @@ def select_changes(self, parent: str, commit: str) -> ChangeInfo:
                      cs.name, cb.time DESC, pb.time DESC
         ''', (commit, parent))
 
-        keep = ('platform', 'target', 'config', 'name', 'parent_size',
+        keep = ('platform', 'target', 'config', 'kind', 'name', 'parent_size',
                 'commit_size')
         things: set[int] = set()
         artifacts: set[int] = set()
@@ -229,7 +223,7 @@ def select_changes(self, parent: str, commit: str) -> ChangeInfo:
                 artifacts.add(row['artifact'])
                 builds.add(row['commit_build'])
 
-        return ChangeInfo(('platform', 'target', 'config', 'section',
+        return ChangeInfo(('platform', 'target', 'config', 'kind', 'section',
                            parent[:8], commit[:8], 'change', '% change'), rows,
                           things, builds, stale_builds, artifacts,
                           stale_artifacts)