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diff --git a/trunk/TAO/docs/rtcorba/status.html b/trunk/TAO/docs/rtcorba/status.html new file mode 100644 index 00000000000..e24248985c7 --- /dev/null +++ b/trunk/TAO/docs/rtcorba/status.html @@ -0,0 +1,131 @@ +<html> +<!-- $Id$ --> + +<head> +<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> +<title>Status of Real-Time CORBA Support in TAO</title> +<meta name="GENERATOR" content="Microsoft FrontPage 4.0"> +</head> + +<body> + +<h3><a name="intro">Real-Time CORBA Support in TAO</a> </h3> +<a name="status"> + +<p>Support for <a href="http://www.omg.org">OMG</a> <a +href="http://cgi.omg.org/cgi-bin/doc?ptc/99-05-03">Real-Time CORBA 1.0 +specification</a> has been added to TAO. For an overview of Real-time +CORBA features, please see the <A +HREF="http://www.cs.wustl.edu/~schmidt/report-doc.html#rt">C/C++ Users +Journal columns</A> written by <A +HREF="http://www.cs.wustl.edu/~schmidt/">Douglas Schmidt</A> and <A +HREF="http://www.iona.com/hyplan/vinoski/">Steve Vinoski</a>. For a +detailed design discussions and results of empirical performance +analyzes of TAO's Real-time CORBA implementation, please see the <A +HREF="http://www.cs.wustl.edu/~schmidt/doc-group.html">DOC group's</a> +<A +HREF="http://www.cs.wustl.edu/~schmidt/corba-research-realtime.html">Real-time +CORBA research page</A>. + +<p>As usual, questions, comments, and contributions should be posted +to the <a href="news:comp.soft-sys.ace">comp.soft-sys.ace</a> +newsgroup, and bug reports can be submitted either through our +web-based <a +href="http://deuce.doc.wustl.edu/bugzilla/index.cgi">bug-tracking +system</a> (best) or by filling out the <A +HREF="../../PROBLEM-REPORT-FORM">TAO_ROOT/PROBLEM-REPORT-FORM</A> +and posting it to the newsgroup. Please indicate "RTCORBA" +in the component field when submitting a bug report. </p> + +<p>Points of contact for the project are: + +<ul> + <li><a href="mailto:corsaro@cs.wustl.edu">Angelo Corsaro</a> - collocation and policy + encoding into ior</li> + <li><a href="mailto:irfan@cs.wustl.edu">Irfan Pyarali</a> - POA threadpools and RT POA</li> + <li><a href="mailto:marina@cs.wustl.edu">Marina Spivak</a> - all other features and online + documentation </li> + <li><a href="mailto:yamuna@oomworks.com">Yamuna Krishnamurthy</a> - Diffserv support in RTCORBA </li> +</ul> + +<h3><a name="supported">Supported Features</a></h3> + +<p>Following is the complete list of features from the Real-Time CORBA 1.0 specification +that are currently supported in TAO. (These do not include <a href="#in progress">work +in progress</a>). + +<ul> + <li>Real-Time ORB</li> + <li>Real-Time POA</li> + <li>Real-Time Current</li> + <li>Priority Mappings</li> + <li>Client_Propagated Priority Model</li> + <li>Server_Declared Priority Model</li> + <li>Server Protocol Policy</li> + <li>Client Protocol Policy</li> + <li>Priority Banded Connections</li> + <li>Explicit Binding</li> + <li>Private Connections</li> + <li>Invocation Timeout</li> + <li>RT Mutex</li> + <li>POA Threadpools</li> +</ul> + +<h3><a name="unsupported">Unsupported Features</a></h3> + +<p>The following features are not currently supported, and there are no immediate plans +for their implementation: + +<ul> + <li>POA Threadpool request buffering</li> + <li>POA Threadpool thread borrowing </li> + <li>Priority Transforms</li> + <li>ORBinit command-line option</li> +</ul> + +<h3><a name="future">Future Work</a></h3> + +<ol> + + <li>Currently, persistent objects are not supported for RT POAs. We + need to add this feature.</li> + + <li>Currently, purging of connection only happens for the lane of + the thread that runs out of connection. We need to change this + such that we allow system wide purging.</li> + + <li>Currently, all user-created threads are part of the default + thread pool. There is nothing done to separate out these threads + into different (implicit) lanes based on their priorities. We may + need to add this separation to get better/predictable behavior + with respect to sharing of resources across threads of different + priorities.</li> + + <li>Currently, some CDR memory pools are global. We should + reevaluate them to see which of them can be made a per-lane + resource.</li> + + <li>Improve current RT CORBA implementation through benchmarking and + optimizations, resolving known bugs and issues, adding examples, + and other enhancements.</li> + + <li>Implement an alternative real-time orb architecture using a + <em>queue-per-lane</em> approach, as described in the <a + href="architecture.html">TAO Real-Time Architecture</a> + section. In this approach, each threadpool lane owns a queue, + while I/O resources are being shared among all the threadpool + lanes of the same priority within a server. Strategize TAO to use + either <em>queue-per-lane</em> or <em>reactor-per-lane</em> + implementation, and compare the two.</li> + + <li>As both real-time and fault tolerance implementations mature + separately, explore issues in combining them, and, ultimately, + enable TAO to provide applications with both real-time and fault + tolerance support at the same time. </li> </ol> + +<hr> +<i> + +<p>Last modified: $Date$</i></p> +</body> +</html> |