commit b270adc1835b7ccdc21ecaa5996e0574c088154d
author Brad Bishop <bradleyb@fuzziesquirrel.com> Tue Nov 14 23:32:59 2017 -0500
committer Brad Bishop <bradleyb@fuzziesquirrel.com> Wed Nov 15 04:40:40 2017 +0000
tree 15c531d544d706315866788434ad21599be1ae70
parent eded8f31e54c5ee4049563d0f0894d37b8c25c69

server: Reduce PropertiesChanged wakeups

The mapper subscribes to all PropertiesChanged signal events, and
then discards them if the changed interface is not the associations
interface.

Add an arg0 filter on the signal subscription to drastically reduce
the number of spurious wakeups.

Resolves openbmc/openbmc#2573

Change-Id: I5e6659c90d292a3da06c5dda148d0caed8939ecc
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>

obmc/mapper/server.py

diff --git a/obmc/mapper/server.py b/obmc/mapper/server.py
index 8817ae2..b49eeb0 100644
--- a/obmc/mapper/server.py
+++ b/obmc/mapper/server.py
@@ -267,6 +267,7 @@
             self.properties_changed_handler,
             dbus_interface=dbus.PROPERTIES_IFACE,
             signal_name='PropertiesChanged',
+            arg0=obmc.dbuslib.enums.OBMC_ASSOCIATIONS_IFACE,
             path_keyword='path',
             sender_keyword='sender')