Compaq Professional 6000 Highly Parallel System Architecture for Compaq Profes
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- Compaq Professional 6000 | Highly Parallel System Architecture for Compaq Profes - Page 1
could provide the required levels of performance, processor and I/O expandability, and bandwidth to satisfy the needs of workstation users. Compaq is therefore implementing a new architecture that delivers the greatest bandwidth available today for systems running such demanding applications under - Compaq Professional 6000 | Highly Parallel System Architecture for Compaq Profes - Page 2
FirstPaq, SolutionPaq, EasyPoint, EZ Help, MaxLight, MultiLock, QuickBlank, QuickLock, UltraView, Innovate logo, and Compaq PC Card Solution logo are trademarks and/or service marks of Compaq Computer Corporation. Microsoft, Windows, Windows NT, Windows NT Advanced Server, SQL Server for Windows NT - Compaq Professional 6000 | Highly Parallel System Architecture for Compaq Profes - Page 3
increased even more if the system configuration includes an optional Compaq drive array controller that can increase performance in disk- multiple disk drives. ADVANCED SMP It is widely recognized that SMP has been supported on both RISC/UNIX workstations and servers for a number of years. Most - Compaq Professional 6000 | Highly Parallel System Architecture for Compaq Profes - Page 4
Compaq Professional Workstation 6000. This architecture supports up to four processors in the Compaq the larger 512-KB L2 cache holds more instructions, it provides a higher cache hit rate than next generation P6 processor from Intel. Formerly code named Klamath, the Pentium II processor will - Compaq Professional 6000 | Highly Parallel System Architecture for Compaq Profes - Page 5
instructions, MMX achieves some efficiencies by using a technique called SIMD (single instruction multiple data). SIMD reduces the required number of clock cycles by performing redundant instructions Pentium II systems will support a maximum of two performance, the Compaq Professional Workstation - Compaq Professional 6000 | Highly Parallel System Architecture for Compaq Profes - Page 6
ECG066/1198 TECHNOLOGY BRIEF (cont.) ... Because each of the two memory buses in this architecture is capable of returning data to the processor at the full 533-MB/s speed of the processor bus, it could seem superfluous to have more memory bandwidth than can be sent across the processor bus. One - Compaq Professional 6000 | Highly Parallel System Architecture for Compaq Profes - Page 7
ECG066/1198 TECHNOLOGY BRIEF (cont.) ... memory size and evenly splitting those DIMMs between the two memory channels. Table 1 is a DIMM configuration guide for optimizing performance of dual memory buses. The table shows matched memory sizes on both banks. Other memory configurations are valid. - Compaq Professional 6000 | Highly Parallel System Architecture for Compaq Profes - Page 8
which is very typical), subsequent read requests from that PCI bus master can be serviced from the I/O cache rather than directly from system memory. Likewise, when a to doubling the I/O bandwidth, the dual-peer PCI buses can support more PCI slots than a single PCI bus, providing greater I/O - Compaq Professional 6000 | Highly Parallel System Architecture for Compaq Profes - Page 9
Compaq is implementing this new Highly Parallel System Architecture because other architectures do not provide equal levels of bandwidth, performance, expansion, and cost effectiveness. Typical NT/X86 Architecture Most workstations in the NT/X86 market support two processors to process instructions - Compaq Professional 6000 | Highly Parallel System Architecture for Compaq Profes - Page 10
separate memory pools concurrently. Furthermore, the ELSA Gloria-L 3D graphics board and the Diamond Fire GL 4000 3D graphics board available with the new Compaq workstations have their own frame buffer and Z-buffer/texture memory. They do not rely on a common pool of memory for most data. Since - Compaq Professional 6000 | Highly Parallel System Architecture for Compaq Profes - Page 11
chip when several buses are implemented in the crossbar switch. A crossbar switch supporting the processor bus, two PCI buses, and two memory buses is not cost effective with today's silicon technology. Compaq chose not to use a crossbar switch because a better architectural solution was possible - Compaq Professional 6000 | Highly Parallel System Architecture for Compaq Profes - Page 12
applications require large memory configurations. The Highly Parallel System Architecture, on the other hand, uses proven EDO memory technology that is supported by other Compaq enterprise products. Customers who plan to migrate to 100-MHz SDRAM next year will be able to protect and fully amortize - Compaq Professional 6000 | Highly Parallel System Architecture for Compaq Profes - Page 13
manage three video streams, something that would not be feasible using only a single PCI bus implementation. Compaq Professional Workstations using the Highly Parallel System Architecture support industry-standard PCI-based 2D- and 3D-graphics solutions. In conjunction with dual-peer PCI buses, the
T
ECHNOLOGY
B
RIEF
1
ECG066/1198
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November 1998
Compaq Computer
Corporation
ISSD Technology
Communications
C
ONTENTS
Introduction
......................
3
Architecture Overview
.......
3
Advanced SMP
..................
3
Pentium Pro Processor
........
4
Pentium II Processor
...........
4
Dual Memory Buses
..........
5
Dual-Peer PCI Buses
.........
8
Multiple Drives
..................
8
Alternative
Architectures
....................
9
Typical NT/X86
Architecture
.......................
9
Unified Memory
Architecture
.......................
9
Crossbar Switch
Architecture
.....................
11
AGPset Architecture
..........
12
Conclusion
.....................
13
Highly Parallel System Architecture for
Compaq Professional Workstations
5100, 6000, and 8000
As critical applications for financial analysis, computer-aided design (CAD), computer-
aided engineering (CAE), and digital content creation (DCC) place growing demands on
system resources, increasing system bandwidth becomes a critical business issue.
After
evaluating available system architectures, Compaq determined that only a new, highly
parallel system architecture could provide the required levels of performance, processor
and I/O expandability, and bandwidth to satisfy the needs of workstation users.
Compaq
is therefore implementing a new architecture that delivers the greatest bandwidth
available today for systems running such demanding applications under the Microsoft
Windows NT operating system.
This technology brief describes the new Highly Parallel System Architecture and
differentiates it from other architectures used in X86 systems.
Please direct comments regarding this communication to the ISSD Technology Communications Group at this Internet address: