OMG Real Time Workshop

Transcription

1 OMG Real Time Workshop ORB Inter-Operability Testing Traci McDonald NSWCDD Charlie Fudge NSWCDD 1

2 Purpose Purpose of the Presentation Present motivation for the task and a sample of the results of inter-operability testing between two ORBs Purpose of the Task Assess the amount of effort involved in getting: Two ORBs to communicate Porting benchmark applications to another OS Changing compilers Integrating in another ORB Quantify how the performance scales when ORBs interoperate with different hardware, OSs and other ORBs

3 OA Goals Open Architecture (OA) Goals Reduce total ownership cost Make system change and upgrade easier and faster Lower the impact of COTS refresh Reduce interoperability and compatibility problems Two Implementation Concepts to Achieve OA Goals Common set of warfighting functions A layered standards based Open Architecture Computing Environment (the OACE) 3

4 OA Scope Unique Next Generation Components UNIQUE UNIQUE UNIQUE UNIQUE UNIQUE INTERFACE INTERFACE INTERFACE INTERFACE INTERFACE Common Design Design Guidance Guidance COMMON FUNCTIONS ACROSS ALL SHIP CLASSES Build in FY3-5 COMPUTING PLANT (Common Standards & Guidance) Architecture, Architecture, technologies, technologies, standards, standards, specifications specifications and and products products 4

5 Motivation What Does OA Bring to the Table Regarding the Computing Environment Technical Architecture Layered approach Standards OMG, IEEE, ISO etc. Guidance/Requirements Motivation for the Task was to Validate that a Standardized Middleware such as CORBA Could Assist in Achieving OA Goals 5

6 Configuration Server Host X86 CPU: 1 Pentium 3, 8 MHZ Memory: 18 Mbytes OS: Lynx 3.1 Compiler: gcc.9 NIC: Intel Pro ACE Version: 5. TAO Version: 1. ORBexpress Version:.3. Client Host Fast Ethernet Mbps HP ProCurve 4 /-T Switch Server Host Client Host Memory: 51 Mbytes OS: Solaris.8 Compiler: gcc.95., Sun CC 5.1 NIC: Sun Fast Ethernet ACE Version: 5. TAO Version: 1. ORBexpress Version:.5.1 Sun Microsystems UltraEnterprise CPUs: MHz Sparc Sun Microsystems Ultra CPUs: - MHz UltraSPARC 6

7 Test Methodology IDL Operations (Throughput) static one-way pass octets and structures as in parameters and returns a void total of 64MB of data transferred using various buffer sizes Data Collected Throughput measured for a group of messages sent averages, std devs, mins and maxs for samples IDL Operations (Latency) static one-way and two-way pass octets and structures as in parameters and returns a void 3 to 4 byte buffer sizes in increments of 3 bytes passed noparams and returned void Data Collected latency measured for each message sent averages, std devs, mins and maxs for samples Two-way Latency Request Server Response Client Timeresponse recvd - Timerequest sent End to End Thruput Server Client Timelast recv - Timefirst send / Quantity Data Sent 7

8 Throughput Results Throughput Octet - Same ORB Same OS Second letter = Host (Client, Server) TCL/TSS combination did not work Throughput Octet - Same ORB Different OS TCL/TSS TCS/TSL OCL/OSS OCS/OSL 48 4 Mbps Third letter = OS (Solaris, Lynx) TCL/TSL TCS/TSS OCL/OSL OCS/OSS TCP Lynx TCP Solaris 48 4 Mbps First letter = ORB (TAO, ORBexpress)

9 Throughput Results First letter = ORB (TAO, ORBexpress) Second letter = Host (Client, Server) Third letter = OS (Solaris, Lynx) TCL/OSL OCL/TSL OCS/TSS TCS/OSS 48 4 Throughput Octet - Different ORB Different OS 8 Mbps TCL/OSS OCS/TSL OCL/TSS TCS/OSL Mbps Throughput Octet - Different ORB Same OS 9

10 Roundtrip Latency Results Roundtrip Latency Octet - Same ORB Same OS 3.5 First letter = ORB (TAO, ORBexpress) 3 Third letter = OS (Solaris, Lynx) TCL/TSL TCS/TSS TCP Lynx TCP Solaris TCL/TSS combination did not work Roundtrip Latency Octet - Same ORB Different OS Msec Msec Second letter = Host (Client, Server) OCL/OSL OCS/OSS.5 TCL/TSS 1 TCS/TSL OCL/OSS.8.6 OCS/OSL

11 Roundtrip Latency Results Roundtrip Latency Octet - Different ORB Same OS First letter = ORB (TAO, ORBexpress) 3 Second letter = Host (Client, Server) Third letter = OS (Solaris, Lynx) TCL/OSL 1.5 OCL/TSL OCS/TSS 1 TCS/OSS Roundtrip Latency Octet - Different ORB Different OS Msec Msec TCL/OSS OCS/TSL OCL/TSS TCS/OSL

12 Conclusions Porting Effort Was Relatively Easy Integrating in Another ORB Was Straight Forward ORB APIs and functionality behind the APIs were consistent Moving from the Sun To gcc Compiler was not as Easy gcc not as forgiving as the Sun compiler ORBs Successfully Inter-Operated in Multiple Configurations Configuration has Significant Effect on Performance Particular OS and CORBA server combinations can dominate performance 1

13 Summary Results Support Spirit and Intent in OA Guidance Documents As OA System Architecture moves into the Implementation and Design Phase, ORB/OS/Hardware and CORBA Client/Server Configuration Decisions will be important Full Set of Results will be Published in an NSWC Technical Report 13

14 Back-up Slides 14

15 Technical Architecture Layers Application Computer Programs (Domain Unique) Standards Based Government / Industry Design Industry Builds Sensors / Sensor Control Track Formation Comms Control Command & Control Weapons Control Others: Trng, Readiness Damage Control R e s o u r c e Power & Propulsion Control Isolated Common Services Synchronization (Timing) / Data recording / O/I Control / Power Management Middleware (Standards Based) *Standards defined by OMG COTS Computing Technology (Standards Based) *Standards defined by IEEE Isolated Example: CORBA Distribution Middleware Frameworks Adaptation Middleware M a n a g e m e n t Multiple COTS Vendors Isolated Example: POSIX Technology Changes Frequently Real-Time Operating System Computing Equipment Cable Plant Commercial Computer Industry Provided Cabinets Switches Drivers Processors Multiple COTS Vendors Multiple COTS Vendors 15

16 Throughput Results Throughput Octet - All Mbps Lynx/Lynx Solaris/Solaris TCL/OSL OCL/TSL OCS/TSS TCS/OSS TCL/OSS OCS/TSL OCL/TSS TCS/OSL TCP Lynx TCP Solaris TCL/TSS E+5 TCS/TSL OCL/OSS OCS/OSL 16

17 Roundtrip Latency Results Roundtrip Latency Octet - TAO Msec Lynx/Lynx Solaris/Solaris TCL/OSL OCL/TSL OCS/TSS TCS/OSS TCL/OSS OCS/TSL OCL/TSS TCS/OSL TCP Lynx TCP Solaris TCL/TSS TCS/TSL OCL/OSS OCS/OSL 17