From b270adc1835b7ccdc21ecaa5996e0574c088154d Mon Sep 17 00:00:00 2001
From: Brad Bishop <bradleyb@fuzziesquirrel.com>
Date: Tue, 14 Nov 2017 23:32:59 -0500
Subject: 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 | 1 +
 1 file changed, 1 insertion(+)

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 @@ class ObjectMapper(dbus.service.Object):
             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')
 
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