The Alpha Roadmap How it applies to Alpha clusters阿尔法的路线图，它如何适于α簇.pptVIP

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The Alpha Roadmap How it applies to Alpha clusters阿尔法的路线图，它如何适于α簇.ppt

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The Alpha Roadmap How it applies to Alpha clusters阿尔法的路线图，它如何适于α簇

The Alpha RoadmapHow it applies to Alpha clusters Ray Hookway Compaq Computer Corporation Littleton, MA Ray.Hookway@ Map Features Alpha Processor Roadmap Alpha Systems Alpha Clusters Processor Roadmap References: Pete Bannon, “Alpha 21364: A Scalable Single-chip SMP”, Microprocessor Forum 1998, /alphaoem/microprocessorforum.htm Joel Emer, “Simultaneous Multithreading: Multiplying Alpha Performance”, Microprocessor Forum 1999 Alpha Roadmap Alpha 21264 is performance leader Alpha 21264 Systems AlphaServer 8400 with EV6/575 IA-64 .vs. Alpha Philosophy Alpha 21364 Goals Improve Single processor performance, operating frequency, and memory system SMP scaling System performance density (computes/ft3) Reliability and availability Decrease System cost System complexity Estimated time for TPC-C Alpha 21364 Features Alpha 21264 core with enhancements Integrated L2 Cache Integrated memory controller Integrated network interface Support for lock-step operation to enable high-availability systems. 21364 Chip Block Diagram 21364 Core Integrated L2 Cache 1.5 MB 6-way set associative 16 GB/s total read/write bandwidth 16 Victim buffers for L1 - L2 16 Victim buffers for L2 - Memory ECC SECDED code 12ns load to use latency Integrated Memory Controller Direct RAMbus High data capacity per pin 800 MHz operation 30ns CAS latency pin to pin 6 GB/sec read or write bandwidth 100s of open pages Directory based cache coherence ECC SECDED Integrated Network Interface Direct processor-to-processor interconnect 10 GB/second per processor 15ns processor-to-processor latency Out-of-order network with adaptive routing Asynchronous clocking between processors 3 GB/second I/O interface per processor 21364 System Block Diagram Alpha 21364 Technology 0.18 mm CMOS 1000+ MHz 100 Watts @ 1.5 volts 3.5 cm2 6 Layer Metal 100 million transistors 8 million logic 92 million RAM Alpha 21364 Performance/Status 70 SPECint95 (estimated) 140 SPECfp95 (estimated) RTL model running Tapeout 4Q99 21364 Summar