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Sun Microsystems, Inc.
Chapter 2
The UltraSPARC T2 Processor with CoolThreads
Technology
The UltraSPARC T2 processor is the industry’s first system on a chip (SoC), supplying the
most cores and threads of any general-purpose processor available, and integrating all
key system functions.
UltraSPARC T2: The World's First Massively Threaded System
on a Chip (SoC)
The UltraSPARC T2 processor eliminates the need for expensive custom hardware and
software development by integrating computing, networking, security, and I/O on to a
single chip. Binary compatible with earlier UltraSPARC processors, no other processor
delivers so much performance in so little space and with such small power
requirements — letting organizations rapidly scale the delivery of new network services
with maximum efficiency and predictability. The UltraSPARC T2 processor is shown in
Figure 3, to the left of the previous-generation UltraSPARC T1 processor. Even with twice
the computational throughput and significantly higher levels of integration, the
UltraSPARC T2 processor is physically smaller than the UltraSPARC T1 processor.
Figure 3. The UltraSPARC T2 (left) and UltraSPARC T1 Processors with CoolThreads Technology
Each UltraSPARC T2 processor supports:
• Up to eight cores @ 1.2 Ghz – 1.4 Ghz
• Eight threads per core for a total maximum of 64 threads per processor
• 4 MB L2 cache in eight banks (16-way set associative)
• Four on-chip memory controllers for support of up to 16 FBDIMMs
• Up to 64 GB of memory (4 GB FBDIMMs) with 60 GB/s memory bandwidth
• Eight fully pipelined floating point units (1 per core)
• Dual on-chip 10 Gb Ethernet interfaces
• Integral PCI-Express interface
• Eight stream processing units (cryptographic co-processors), one per core