bitbake: runqueue/siggen: Optimise hash equiv queries

We only have hash equivalence for setscene tasks so only query the server
for those, reducing the number of connections needed.

(Bitbake rev: 22082c7b3ca0cffcedb7d1d8c6681d35286376db)

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

bitbake/lib/bb/runqueue.py

@@ -1173,6 +1173,7 @@ class RunQueueData:
                     self.prepare_task_hash(tid)
 
         bb.parse.siggen.writeout_file_checksum_cache()
+        bb.parse.siggen.set_setscene_tasks(self.runq_setscene_tids)
 
         #self.dump_data()
         return len(self.runtaskentries)

bitbake/lib/bb/siggen.py

@@ -91,6 +91,8 @@ class SignatureGenerator(object):
     def save_unitaskhashes(self):
         return
 
+    def set_setscene_tasks(self, setscene_tasks):
+        return
 
 class SignatureGeneratorBasic(SignatureGenerator):
     """
@@ -106,6 +108,7 @@ class SignatureGeneratorBasic(SignatureGenerator):
         self.taints = {}
         self.gendeps = {}
         self.lookupcache = {}
+        self.setscenetasks = {}
         self.basewhitelist = set((data.getVar("BB_HASHBASE_WHITELIST") or "").split())
         self.taskwhitelist = None
         self.init_rundepcheck(data)
@@ -151,6 +154,9 @@ class SignatureGeneratorBasic(SignatureGenerator):
 
         return taskdeps
 
+    def set_setscene_tasks(self, setscene_tasks):
+        self.setscenetasks = setscene_tasks
+
     def finalise(self, fn, d, variant):
 
         mc = d.getVar("__BBMULTICONFIG", False) or ""
@@ -394,6 +400,10 @@ class SignatureGeneratorUniHashMixIn(object):
 
         taskhash = self.taskhash[tid]
 
+        # If its not a setscene task we can return
+        if self.setscenetasks and tid not in self.setscenetasks:
+            return taskhash
+
         key = self.__get_task_unihash_key(tid)
 
         # TODO: This cache can grow unbounded. It probably only needs to keep