Bull dozer transport software#
Bull dozer transport code#

Bull dozer transport code#

In terms of hardware complexity and functionality, a Bulldozer CMT module is equal to a dual-core processor in its integer calculation capabilities, and to either a single-core processor or a handicapped dual-core in terms of floating-point computational power, depending on whether the code is saturated in floating point instructions in both threads running on the same CMT module, and whether the FPU is performing 128-bit or 256-bit floating point operations. Prior examples of such an approach to unconventional multithreading can be traced way back to the 2005 Sun Microsystems' UltraSPARC T1 CPU. Architecture Bulldozer core Block diagram of a complete Bulldozer module, showing 2 integer clusters Block diagram of a 4 module design with 8 integer clusters Memory topology of a Bulldozer server Bulldozer die shot with highlighted partsīulldozer made use of 'Clustered Multithreading' (CMT), a technique where some parts of the processor are shared between two threads and some parts are unique for each thread. Mentioned reasons for regaining the profitability were the earlier divesting of in-house manufacturing into GlobalFoundries and then outsourcing the manufacturing to TSMC and making a new Ryzen CPU design.

The company later managed to return to profit. By his observation, issues caused a big loss for AMD, that the company lost over 1 billion USD in 2012, and that some industry observers were predicting the bankruptcy by mid-2015.

Bull dozer transport software#

In a retrospective review, Jeremy Laird of APC magazine commented on Bulldozer issues, noted that it was slower than outgoing Phenom II K10 design, and that the PC software ecosystem had not yet 'embraced' the multi-threaded model. Each physical integer core, two per module, is single threaded, in contrast with Intel's Hyperthreading, where two virtual simultaneous threads share the resources of a single physical core. The modular architecture consists of multithreaded shared L2 cache and FlexFPU, which uses simultaneous multithreading. A 16-core processor design would feature eight of these 'modules', but the operating system will recognize each 'module' as two logical cores. Bulldozer also introduced shared L2 cache in the new architecture. This design is accompanied by two integer clusters, each with 4 pipelines (the fetch/decode stage is shared). īulldozer is the first major redesign of AMD’s processor architecture since 2003, when the firm launched its K8 processors, and also features two 128-bit FMA-capable FPUs which can be combined into one 256-bit FPU. The server segment included the dual chip (16-core) Opteron processor codenamed Interlagos (for Socket G34) and single chip (4, 6 or 8 cores) Valencia (for Socket C32), while the Zambezi (4, 6 and 8 cores) targeted desktops on Socket AM3+. Only Bulldozer GEN4 ( Excavator) supports AVX2 instruction sets.Īccording to AMD, Bulldozer-based CPUs are based on GlobalFoundries' 32 nm Silicon on insulator (SOI) process technology and reuses the approach of DEC for multitasking computer performance with the arguments that it, according to press notes, 'balances dedicated and shared computer resources to provide a highly compact, high units count design that is easily replicated on a chip for performance scaling.' In other words, by eliminating some of the 'redundant' elements that naturally creep into multicore designs, AMD has hoped to take better advantage of its hardware capabilities, while using less power.īulldozer-based implementations built on 32nm SOI with HKMG arrived in October 2011 for both servers and desktops.

The Bulldozer cores support most of the instruction sets implemented by Intel processors ( Sandy Bridge) available at its introduction (including SSE4.1, SSE4.2, AES, CLMUL, and AVX) as well as new instruction sets proposed by AMD ABM, XOP, FMA4 and F16C. AMD claims dramatic performance-per-watt efficiency improvements in high-performance computing (HPC) applications with Bulldozer cores.

The core is specifically aimed at computing products with TDPs of 10 to 125 watts. It was released on October 12, 2011, as the successor to the K10 microarchitecture.īulldozer is designed from scratch, not a development of earlier processors. Bulldozer is the codename for this family of microarchitectures. The AMD Bulldozer Family 15h is a microprocessor microarchitecture for the FX and Opteron line of processors, developed by AMD for the desktop and server markets.