HP Professional 6000 Highly Parallel System Architecture for Compaq Profession
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- HP Professional 6000 | Highly Parallel System Architecture for Compaq Profession - Page 1
.......3 Advanced SMP 3 Pentium Pro Processor ........4 Pentium II Processor System Architecture for Compaq Professional Workstations 5100, 6000, and 8000 As critical applications for and bandwidth to satisfy the needs of workstation users. Compaq is therefore implementing a new architecture - HP Professional 6000 | Highly Parallel System Architecture for Compaq Profession - Page 2
, Innovate logo, and Compaq PC Card Solution logo are trademarks and/or service marks of Compaq Computer Corporation. Microsoft, Windows, Windows NT, Windows NT Highly Parallel System Architecture for Compaq Professional Workstations 5100, 6000, and 8000 Second Edition (November 1998) ECG066/1198 2 - HP Professional 6000 | Highly Parallel System Architecture for Compaq Profession - Page 3
efforts, Compaq is one of the first supports dual-peer PCI buses that double I/O bandwidth and allow for more I/O expandability. The new architecture is being implemented initially in two Compaq products, the Compaq Professional Workstation 6000 and the Compaq Professional Workstation 8000 users can - HP Professional 6000 | Highly Parallel System Architecture for Compaq Profession - Page 4
up to four processors in the Compaq Professional Workstation 8000. The new Highly Parallel System Architecture implemented by Compaq provides excellent scalability for increased system performance. It supports the use of multiple Intel Pentium Pro processors or Intel Pentium II processors. Each - HP Professional 6000 | Highly Parallel System Architecture for Compaq Profession - 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 systems will support a maximum Professional go to the processor on one clock pulse, and the second - HP Professional 6000 | Highly Parallel System Architecture for Compaq Profession - Page 6
2 buses = 355 MB/s To take full advantage of the two memory buses, at least two memory requests must be issued at a time, one on each memory bus. SMP Pentium Pro processors can issue up to eight cycles at a time, which increases the likelihood of having cycles run to both memory controllers. Because - HP Professional 6000 | Highly Parallel System Architecture for Compaq Profession - 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. - HP Professional 6000 | Highly Parallel System Architecture for Compaq Profession - Page 8
Users subsequent read requests from that PCI bus master can be serviced from the I/O cache rather than directly from system memory bandwidth, the dual-peer PCI buses can support more PCI slots than a single PCI bus to the system. By using more than one disk drive, certain disk-oriented operations may - HP Professional 6000 | Highly Parallel System Architecture for Compaq Profession - Page 9
Most workstations in the NT/X86 market support two processors to process instructions concurrently (Figure 5). Overall system bandwidth so by sacrificing performance. With SGI's UMA, the processor and graphics controller share one memory pool that is connected by a single bus with a peak bandwidth of - HP Professional 6000 | Highly Parallel System Architecture for Compaq Profession - Page 10
ECG066/1198 TECHNOLOGY BRIEF (cont.) ... rate of 334 MB/s. The large amount of memory bandwidth consumed by monitor refreshing is not available to the processor and graphics controller for other tasks. In contrast, all graphics cards used in Compaq workstations use dual-ported memory that does not - HP Professional 6000 | Highly Parallel System Architecture for Compaq Profession - Page 11
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 solution was possible for the following reasons. First, the Pentium Pro processor bus is capable of running up to eight transactions simultaneously - HP Professional 6000 | Highly Parallel System Architecture for Compaq Profession - Page 12
SDRAM could result in large obsolescence costs as early as next year, when users migrate to higher performance 100-MHz SDRAM technology. This can be a on the other hand, uses proven EDO memory technology that is supported by other Compaq enterprise products. Customers who plan to migrate to - HP Professional 6000 | Highly Parallel System Architecture for Compaq Profession - Page 13
this increased bandwidth represents performance improvement of only about a one percent in most graphics-intensive applications. This very small a single PCI bus implementation. Compaq Professional Workstations using the Highly Parallel System Architecture support industry-standard PCI-based 2D- and
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: