bitbake: cooker: Log config and parse cache status changes

It can be hard to tell why bitbake does some things slowly. Log the changes
to the base configuration and parse cache status so that it becomes clear
from the logs when the cache invalidation causes a slowdown.

(Bitbake rev: 6e99d89f3c00a5f53c24d687eaef24f52fe0ef99)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/cooker.py

@@ -151,6 +151,8 @@ class BBCooker:
 
     def __init__(self, featureSet=None, server=None):
         self.recipecaches = None
+        self.baseconfig_valid = False
+        self.parsecache_valid = False
         self.eventlog = None
         self.skiplist = {}
         self.featureset = CookerFeatures()
@@ -264,11 +266,25 @@ class BBCooker:
                     n.read_events()
                     n.process_events()
 
+    def _baseconfig_set(self, value):
+        if value and not self.baseconfig_valid:
+            bb.server.process.serverlog("Base config valid")
+        elif not value and self.baseconfig_valid:
+            bb.server.process.serverlog("Base config invalidated")
+        self.baseconfig_valid = value
+
+    def _parsecache_set(self, value):
+        if value and not self.parsecache_valid:
+            bb.server.process.serverlog("Parse cache valid")
+        elif not value and self.parsecache_valid:
+            bb.server.process.serverlog("Parse cache invalidated")
+        self.parsecache_valid = value
+
     def config_notifications(self, event):
         if event.maskname == "IN_Q_OVERFLOW":
             bb.warn("inotify event queue overflowed, invalidating caches.")
-            self.parsecache_valid = False
-            self.baseconfig_valid = False
+            self._parsecache_set(False)
+            self._baseconfig_set(False)
             bb.parse.clear_cache()
             return
         if not event.pathname in self.configwatcher.bbwatchedfiles:
@@ -281,12 +297,12 @@ class BBCooker:
                 bb.parse.clear_cache()
         if not event.pathname in self.inotify_modified_files:
             self.inotify_modified_files.append(event.pathname)
-        self.baseconfig_valid = False
+        self._baseconfig_set(False)
 
     def notifications(self, event):
         if event.maskname == "IN_Q_OVERFLOW":
             bb.warn("inotify event queue overflowed, invalidating caches.")
-            self.parsecache_valid = False
+            self._parsecache_set(False)
             bb.parse.clear_cache()
             return
         if event.pathname.endswith("bitbake-cookerdaemon.log") \
@@ -300,7 +316,7 @@ class BBCooker:
                 bb.parse.clear_cache()
         if not event.pathname in self.inotify_modified_files:
             self.inotify_modified_files.append(event.pathname)
-        self.parsecache_valid = False
+        self._parsecache_set(False)
 
     def add_filewatch(self, deps, watcher=None, dirs=False):
         if not watcher:
@@ -422,8 +438,8 @@ class BBCooker:
         for mc in self.databuilder.mcdata.values():
             self.add_filewatch(mc.getVar("__base_depends", False), self.configwatcher)
 
-        self.baseconfig_valid = True
-        self.parsecache_valid = False
+        self._baseconfig_set(True)
+        self._parsecache_set(False)
 
     def handlePRServ(self):
         # Setup a PR Server based on the new configuration
@@ -489,7 +505,7 @@ class BBCooker:
 
         self.handleCollections(self.data.getVar("BBFILE_COLLECTIONS"))
 
-        self.parsecache_valid = False
+        self._parsecache_set(False)
 
     def updateConfigOpts(self, options, environment, cmdline):
         self.ui_cmdline = cmdline
@@ -1509,7 +1525,7 @@ class BBCooker:
                     bb.event.fire(bb.event.BuildCompleted(len(rq.rqdata.runtaskentries), buildname, item, failures, interrupted), self.databuilder.mcdata[mc])
                     bb.event.disable_heartbeat()
                 # We trashed self.recipecaches above
-                self.parsecache_valid = False
+                self._parsecache_set(False)
                 self.configuration.limited_deps = False
                 bb.parse.siggen.reset(self.data)
                 if quietlog:
@@ -1678,7 +1694,7 @@ class BBCooker:
                 self.add_filewatch([[dirent]], dirs=True)
 
             self.parser = CookerParser(self, mcfilelist, total_masked)
-            self.parsecache_valid = True
+            self._parsecache_set(True)
 
         self.state = state.parsing
 
@@ -1796,8 +1812,7 @@ class BBCooker:
            self.data = self.databuilder.data
         # In theory tinfoil could have modified the base data before parsing,
         # ideally need to track if anything did modify the datastore
-        self.parsecache_valid = False
-
+        self._parsecache_set(False)
 
 class CookerExit(bb.event.Event):
     """