[bitbake-devel] [dizzy 7/7] cooker/server: Fix up 100% CPU usage at idle
Alex DAMIAN
alexandru.damian at intel.com
Fri Apr 10 14:57:07 UTC 2015
From: Richard Purdie <richard.purdie at linuxfoundation.org>
The recent inotify changes are causing a 100% cpu usage issue in the
idle handlers. To avoid this, we update the idle functions to optionally
report a float value which is the delay before the function needs to be
called again. 1 second is fine for the inotify handler, in reality its
more like 0.1s due to the default idle function sleep.
This reverts performance regressions of 1.5 minutes on a kernel build
and ~5-6 minutes on a image from scratch.
(Bitbake rev: 0e0ba408c2dce14a0fabd3fdf61d8465a031495b)
Signed-off-by: Richard Purdie <richard.purdie at linuxfoundation.org>
---
lib/bb/cooker.py | 2 +-
lib/bb/server/process.py | 3 +++
lib/bb/server/xmlrpc.py | 3 +++
3 files changed, 7 insertions(+), 1 deletion(-)
diff --git a/lib/bb/cooker.py b/lib/bb/cooker.py
index 2f2a852..aeb3f71 100644
--- a/lib/bb/cooker.py
+++ b/lib/bb/cooker.py
@@ -142,7 +142,7 @@ class BBCooker:
# read notified events and enqeue them
n.read_events()
n.process_events()
- return True
+ return 1.0
self.configuration.server_register_idlecallback(_process_inotify_updates, [self.confignotifier, self.notifier])
diff --git a/lib/bb/server/process.py b/lib/bb/server/process.py
index d362f8d..302ee5f 100644
--- a/lib/bb/server/process.py
+++ b/lib/bb/server/process.py
@@ -135,6 +135,9 @@ class ProcessServer(Process, BaseImplServer):
nextsleep = None
elif retval is True:
nextsleep = None
+ elif isinstance(retval, float):
+ if (retval < nextsleep):
+ nextsleep = retval
elif nextsleep is None:
continue
else:
diff --git a/lib/bb/server/xmlrpc.py b/lib/bb/server/xmlrpc.py
index 4205a4c..10d4b5c 100644
--- a/lib/bb/server/xmlrpc.py
+++ b/lib/bb/server/xmlrpc.py
@@ -241,6 +241,9 @@ class XMLRPCServer(SimpleXMLRPCServer, BaseImplServer):
del self._idlefuns[function]
elif retval is True:
nextsleep = 0
+ elif isinstance(retval, float):
+ if (retval < nextsleep):
+ nextsleep = retval
else:
fds = fds + retval
except SystemExit:
--
1.9.1
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