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authorRichard Purdie <richard.purdie@linuxfoundation.org>2020-02-17 16:18:25 +0000
committerRichard Purdie <richard.purdie@linuxfoundation.org>2020-02-18 13:57:40 +0000
commitef29309d0b512b64d024e383e7baff22c727711c (patch)
tree26e98b5516d2c97ee5fd79b45586b1d33cff7d6a
parent95687be83e716220eb3893b67428f97fd59fc2c5 (diff)
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cooker/siggen: Empty siggen cache during parsing2019-10.2-zeus1.44.2
When parsing recipes its apparent the memory usage of bitbake rises linearly with number of recipes parsed. It shouldn't. Using tracemalloc (thanks for the tip Joshua Lock) it was clear that the dependency information left behind in siggen was the culprit. Add a new method to allow us to drop this information. We don't need it after the recipe has been parsed and hashes calculated (at runtime its different but only the currently executing task would be in memory). This should give signficant memory usage improvements for bitbake and that in turn should help speed on more constrained systems, as well as when used in multiconfig environments. Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
-rw-r--r--lib/bb/cooker.py3
-rw-r--r--lib/bb/siggen.py11
2 files changed, 13 insertions, 1 deletions
diff --git a/lib/bb/cooker.py b/lib/bb/cooker.py
index 911805a6..d2d308ae 100644
--- a/lib/bb/cooker.py
+++ b/lib/bb/cooker.py
@@ -1944,7 +1944,8 @@ class Parser(multiprocessing.Process):
except IndexError:
break
result = self.parse(*job)
-
+ # Clear the siggen cache after parsing to control memory usage, its huge
+ bb.parse.siggen.postparsing_clean_cache()
try:
self.results.put(result, timeout=0.25)
except queue.Full:
diff --git a/lib/bb/siggen.py b/lib/bb/siggen.py
index ffd8fcaf..c2d0c736 100644
--- a/lib/bb/siggen.py
+++ b/lib/bb/siggen.py
@@ -51,6 +51,9 @@ class SignatureGenerator(object):
def finalise(self, fn, d, varient):
return
+ def postparsing_clean_cache(self):
+ return
+
def get_unihash(self, tid):
return self.taskhash[tid]
@@ -188,6 +191,14 @@ class SignatureGeneratorBasic(SignatureGenerator):
for task in taskdeps:
d.setVar("BB_BASEHASH_task-%s" % task, self.basehash[fn + ":" + task])
+ def postparsing_clean_cache(self):
+ #
+ # After parsing we can remove some things from memory to reduce our memory footprint
+ #
+ self.gendeps = {}
+ self.lookupcache = {}
+ self.taskdeps = {}
+
def rundep_check(self, fn, recipename, task, dep, depname, dataCache):
# Return True if we should keep the dependency, False to drop it
# We only manipulate the dependencies for packages not in the whitelist