Changes between Version 9 and Version 10 of Internal/NewNodeAgent

Timestamp:

Dec 15, 2014, 9:48:21 PM (9 years ago)

Author:

ssugrim

Comment:

—

Internal/NewNodeAgent

@@ -139 +139 @@
 ----
 ''' 9/22/2014 '''
- * It may be necissary to have multiple driver modules for a single device. The recurrent case is the iwldvm module. It gets loaded if we load iwlwifi but it depends on iwlwifi. Thus when you load iwlwifi, you can not unload it with out first unloading iwldvm. Because iwlwifi and athXk both depend on cfg802, when the iwldvm module is unloaded with ''modprobe -r iwldvm'', iwlwifi is not unloaded. 
+ * It may be necessary to have multiple driver modules for a single device. The recurrent case is the iwldvm module. It gets loaded if we load iwlwifi but it depends on iwlwifi. Thus when you load iwlwifi, you can not unload it with out first unloading iwldvm. Because iwlwifi and athXk both depend on cfg802, when the iwldvm module is unloaded with ''modprobe -r iwldvm'', iwlwifi is not unloaded. 
 
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@@ -158 +158 @@
 In http://www.orbit-lab.org/browser/omf/omf-expctl/ruby/omf-expctl/node/nodeSetPath.rb
 the set of possible properties that can be set is listed in an array. The original agent command code is here: http://www.orbit-lab.org/browser/omf/omf-resctl/ruby/omf-resctl/omf_agent/agentCommands.rb
+
+----
+''' 12/15/2015 '''
+
+We ran into a race condition of sorts where commands may come in after the connect call was issued. We've decided that the "start_application" directive is the decision point where we've given all the parameters we expect to get. To this end in the node-agent maintains a parameter model of the connection to be made. As parameters come in the node agent updates these parameters from the default. When the "start_application" directive is received, the agent will initiate a connect command. At this point the applicationStarted flag will = true. Once this flag is set, any parameter changes will be applied immediately. Parameters must be split into two types. Those that can be applied immedately (like freq) and those that require a reconnect like mode ibss). Once the applicationStarted flag is set if a reconnect is required when a parameter is changed it is do immedately.
+
+As a side note the different mode connect methods should check if the device is already connected and if so do nothing (regardless of which mode it is connected in).