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The T1 is a new-from-the-ground-up SPARC microprocessor implementation that conforms to the UltraSPARC Architecture 2005 specification [1] and executes the full SPARC V9 instruction set. Sun has produced two previous multicore processors ( UltraSPARC IV and IV+), but UltraSPARC T1 was its first microprocessor that is both multicore and ...
The UltraSPARC has two levels of cache, primary and secondary. There are two primary caches, one for instructions and one for data. Both have a capacity of 16 KB. The UltraSPARC required a mandatory external secondary cache. The cache is unified, has a capacity of 512 KB to 4 MB and is direct-mapped. It can return data in a single cycle.
The UltraSPARC T1 based Sun Fire T2000 and T1000 servers were launched in December 2005 and early 2006, respectively. [ 1 ] [ 3 ] They were later rebranded to match the name of the UltraSPARC T2 and T2 Plus based Sun SPARC Enterprise T5**0 servers.
Sun has published a number of Sun BluePrints to assist application programmers in developing and deploying software on T1 or T2-based CoolThreads servers. The main article, Tuning Applications on UltraSPARC T1 Chip Multithreading Systems, [5] addresses issues for general application programmers. There is also a BluePrints article on using the ...
SPARC architecture has provided continuous application binary compatibility from the first SPARC V7 implementation in 1987 through the Sun UltraSPARC Architecture implementations. Among various implementations of SPARC, Sun's SuperSPARC and UltraSPARC-I were very popular, and were used as reference systems for SPEC CPU95 and CPU2000 benchmarks.
OpenSPARC is an open-source hardware project, started in December 2005, for CPUs implementing the SPARC instruction architecture. The initial contribution to the project was Sun Microsystems' register-transfer level (RTL) Verilog code for a full 64-bit, 32-thread microprocessor, the UltraSPARC T1 processor.
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