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Topic: 64-bit


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 64-bit - Wikipedia, the free encyclopedia
Without further qualification, however, a computer architecture described as "64-bit" generally has integer registers that are 64 bits wide and thus directly supports dealing both internally and externally with 64-bit "chunks" of integer data.
In computer architecture, 64-bit is an adjective used to describe integers, memory addresses or other data units that are at most 64 bits (8 octets) wide, or to describe CPU and ALU architectures based on registers, address buses, or data buses of that size.
While 64-bit architectures indisputably make working with huge data sets in applications such as digital video, scientific computing, and large databases easier, there has been considerable debate as to whether they or their 32-bit compatibility modes will be faster than comparably-priced 32-bit systems for other tasks.
en.wikipedia.org /wiki/64-bit   (2868 words)

  
 AMD64 - Wikipedia, the free encyclopedia
LLP64 data model: "int" and "long" types are still 32 bits wide, while pointers and types derived from pointers are 64 bits wide.
However, on AMD64, 32 bit x86 applications may still benefit from a 64-bit recompile, due to the additional registers in 64-bit code, which a high-level compiler can use for optimization.
This is unlike Intel's IA-64, where differences in the underlying ISA means that running 32-bit code is like using an entirely different processor.
en.wikipedia.org /wiki/AMD64   (2227 words)

  
 VolkerW's WebLog : Who needs 64-bit?
My point is that with 64 bit the costly and time consuming redesign that we are facing just would not have been needed.
I think that the change to 64 bit will happen faster that 16 to 32 bit, beacuse AMD already is selling 64 bit proccesors that are backward-compatible, so people won't mind bying them.
My gut tells me that by the time XP 64 is fully implemented my hardware will be obsolete anyway whether I buy a 64 or 32 bit processor today.
blogs.msdn.com /volkerw/archive/2005/02/11/371108.aspx   (3745 words)

  
 Ars Technica: An Introduction to 64-bit Computing and x86-64 - Page 1 - (3/2003)
When I first heard that AMD had plans to extend the x86 ISA to 64 bits, I thought it was a terrible idea.
Rather, the data sizes are mixed, with 64 bits being the widest.
You should notice that not all of the data in either memory, the cache, or the registers is 64-bit data.
arstechnica.com /cpu/03q1/x86-64/x86-64-1.html   (1251 words)

  
 Making code 64 bit clean
On a 32 bit machine this structure would be a nice convenient 16 bytes in length; however on a 64 bit machine it turns out that it is 24 bytes and actually the best thing would be to leave dummy out.
64 bit Linux machine use an organisation called LP64 where 'long's and pointers are 64 bit in length but everything else is 32 bit; long long's are also 64 bit.
So care must be taken with long's, in addition for pointers %p should always be used rather than %x (since this would have to be %lx on 64 bit systems).
www.advogato.org /article/97.html   (3240 words)

  
 TheKSBWChannel.com - Technology - The 64-Bit Question
The move from 32 bits to 64 is unlikely to bring the same sort of quantum jump in speed or capabilities that we got moving from 16 bits to 32.
While 64 bits is new to the world of x86, other microprocessors made the transition to 64 bits back in the 1990s.
Having lived through the jump from 8 to 16 bits, then 16 to 32, and now 32 to 64, it’s only natural to think that sometime in the distant future we’ll be making the transition from 64-bit to 128-bit systems.
www.theksbwchannel.com /technology/3382556/detail.html   (2832 words)

  
 LinuxHardware.org LinuxHardware.org 64-Bit Desktop Battle!
The Athlon 64 processors still beat out the Intel competitors, the 64-bit OS on Intel chips is slower than the 32-bit OS, and AMD's processors receive a small boost here from the 64-bit optimized code.
There is a bit of debate as to whether these new 64-bit instructions are tacked on above the 32-bit processor core as translation logic or whether the processor has true 64-bit functionality.
There are some other differences, but since I don't have a 64 bit linux distro I like yet, I figure there my be other things that favor the the older chipset.
www.linuxhardware.org /article.pl?sid=05/02/24/1747228   (3335 words)

  
 Porting Linux applications to 64-bit systems
The effort to port an application from 32 bits to 64 bits might range from trivial to very difficult, depending on how these applications were written and maintained.
As far as language implementation is concerned, the current C language standard allows the "long long" data type to be at least 64 bits.
As with UNIX® and other UNIX-like operating systems, Linux uses the LP64 standard, where pointers and long integers are 64 bits but regular integers remain 32-bit entities.
www.ibm.com /developerworks/linux/library/l-port64.html?ca=dgr-lnxwPort64   (2693 words)

  
 AMD64 Solutions
AMD64 is designed to enable simultaneous 32- and 64-bit computing with no degradation in performance.
The AMD Opteron&; processor, the AMD Athlon&; 64 processor, and AMD Turion™ 64 mobile technology comprise the AMD64 family.
AMD64 processors like the AMD Opteron and AMD Athlon 64 processors are compatible with today’s hardware and software and smooth the transition to the next crucial step in the evolution of the personal computer, workstation, server, and supercomputing cluster.
www.amd.com /us-en/Processors/ProductInformation/0,,30_118_9331,00.html   (683 words)

  
 NewsForge 64-bit Linux and BSD are maturing steadily
We knew about Intel's 64 bit contingency plans for years, and we knew that the writing was on the wall for 32 bit silicon.
We didn't want to be stuck with 64 bit as an add-on, instead of as the primary mode of operation.
For example, we use a 64 bit time_t throughout the system, both in the kernel and userland.
os.newsforge.com /os/05/03/30/1242206.shtml?tid=152&tid=2&tid=150&tid=74   (3379 words)

  
 AskTom "32 bit or 64 bit"
Because in so many Oracle documentation I found "32 bit Oracle 7.x" "64 bit Oracle 7.x" "32 bit Oracle 8.x" "64 bit Oracle 8.x" also sometime in migration related documentaion I found people are talking about 32 bit and 64 bit Oracle.
When I run Oracle on a 64 bit platform, shouldn't I get a better throughput because internally Oracle is processing more data as compared to 32 bit.
On 64 Bit Oracle we found that no. of rows generated were higher (approx.
asktom.oracle.com /pls/ask/f?p=4950:8:::::F4950_P8_DISPLAYID:1512005480694   (1923 words)

  
 EUI64.html
The 64-bit identifier is a concatenation of the 24-bit company_id value assigned by the IEEE Registration Authority and a 40 bit extension identifier assigned by the organization with that company_id assignment.
The byte and bit representations for this EUI-64 value are illustrated below:
The IEEE defined 64-bit global identifier (EUI-64) is assigned by a manufacturer who has been assigned a company_id value by the IEEE Registration Authority.
standards.ieee.org /regauth/oui/tutorials/EUI64.html   (1085 words)

  
 Real World Technologies - AMD's 64 Bit Gamble
To extend the addressing range of the x86 architecture beyond 64 Kbytes, Morse arranged it so that the contents of special 16-bit registers would be shifted left by 4 bits, then added to the 8080-like 16-bit logical address to generate a 20 bit physical address.
One of the most extraordinary announcements of last year’s Microprocessor Forum was that of AMD’s intention to extend the Intel x86 architecture from 32 to 64 bits.
The new instruction set architecture, which AMD calls x86-64, will be implemented by their future K8 processor, the heir apparent to their highly successful and widely praised K7 Athlon family.
www.realworldtech.com /page.cfm?ArticleID=RWT071800000000   (510 words)

  
 64-BIT PROGRAMMING MODELS
LP64 (also known as 4/8/8) denotes long and pointer as 64 bit types, ILP64 (also known as 8/8/8) means int, long and pointer are 64 bit types and LLP64 (also known as 4/4/8) adds a new type (long long) and pointer as 64 bit types.
Key issues facing the industry are the interchange of data between 64 and 32-bit systems (in some cases on the same system) and the cost of maintaining software in both environments.
In such cases, the extra 32 bits of data in a 64-bit integer are wasted.
www.unix.org /version2/whatsnew/lp64_wp.html   (3367 words)

  
 Understanding 64-bit PowerPC architecture
Capable of addressing an astronomical 18 billion GB, or 18 exabytes, of memory, 64-bit integers also accelerate complex mathematical calculations through their ability to perform calculations directly on 64-bit numbers, as well as performing multiple operations on smaller numbers within a single CPU cycle (see Resources for the definition of exabyte).
The IBM white paper, "An Introduction to 64-bit Computing and the IBM PowerPC 970FX", provides an overview of 64-bit computing and discusses the advantages of a 64-bit operating system environment (IBM, April 2004).
"PowerPC Microprocessor Family: Programming Environments Manual for 64 and 32-bit Microprocessors" (in PDF) Software Reference Manual can help you develop software that is compatible across the entire family of 64 and 32-bit PowerPC processors (IBM, June 2003).
www-106.ibm.com /developerworks/library/pa-microdesign/?ca=dgr-lnxw0164BitPowerPC   (3819 words)

  
 X-bit labs - Articles - AMD Athlon 64 Performance Preview
All information about the alleged performance of Athlon 64, which had leaked into the web so far, was either very poor and insufficient for any more or less definite conclusions, or concerned AMD Athlon 64 processors working at very low clock frequencies.
In this article we are not going to go into details concerning the Athlon 64 architecture, that is why we suggest that you check our article called “A Glance at the Future: AMD Hammer Processors and x86-64 Technology”, before you continue reading this review.
We would like to remind you that officially, the launch of AMD Athlon 64 is scheduled for September this year.
www.xbitlabs.com /articles/cpu/display/athlon64.html   (715 words)

  
 BetaNews Microsoft Completes 64-Bit Windows
I hope the 64 bit xp operating system is written better than the web page representing a trial version that can be downloaded free of charge.
Besides Xeon, Intel processors are 32 bit based processors, so, to have any serious advantage in a 64 bit based platform you need 64 bit length memory words and 64 bit processing chunks...
The only difference between the two is that 64 bit supports mor than 4 GB of RAM.
www.betanews.com /article/Microsoft_Completes_64Bit_Windows/1112279825   (1512 words)

  
 Athlon 64 FX-53 Gets 64-bit Far Cry - MegaGames hardware
Specifically designed for gamers and PC enthusiasts, the AMD Athlon 64 FX processor has not been able, yet, to fully utilize its advantages due to lack of 64-bit application support.
The AMD Athlon 64 FX processor delivers what no other PC processor, for the time being can: 32 and 64-bit computing.
Leading video game publisher Ubisoft will release a 32-bit version of the much-anticipated action game later this month, and plans to introduce a 64-bit beta version shortly thereafter.
www.megagames.com /news/html/hardware/athlon64fx-53gets64-bitfarcry.shtml   (416 words)

  
 A first look at AMD's Athlon 64 - ZDNet UK Reviews
The Athlon 64 is not the first major 64-bit desktop processor.
Today's announcement is significant because the Athlon 64 is the first 64-bit processor for PCs based on the x86 instruction set.
The chip delivers excellent 32-bit performance today, along with the promise of 64-bit computing tomorrow.
reviews.zdnet.co.uk /hardware/processorsmemory/0,39024015,39116618,00.htm   (601 words)

  
 64-bit Computing
When reading about PCs and servers, you'll often see the CPU described by the number of bits (e.g., 32-bit or 64-bit), here's a little info about what that means.
refers to the number of bits (the smallest unit of information on a machine) that can be processed or transmitted in parallel, or the number of bits used for single element in a data format.
A 32-bit microprocessor can process data and memory addresses that are represented by 32 bits.
www.webopedia.com /DidYouKnow/Computer_Science/2004/64_bit.asp   (839 words)

  
 Eileen Brown's WebLog : Exchange 12 - 64 bit only!
I also unserstand that during the betas, there will be both a 32 bit and 64 bit version of Exchange 12 so you can compare the performance gains.
The product team have been testing E12 on 32 bit and 64 bit, and have found some significant gains and a reduction of IOs per second which results in really good performance gains.
They tested Exchange on 64 bit and found almost a 75% reduction in IOs per second compared with Exchange 2003.
blogs.technet.com /eileen_brown/archive/2005/11/15/e12_64bit_only.aspx   (829 words)

  
 zseries
Of course 64 bit architectures are not new, Compaq (or Digital as it was then) released the 64 bit Alpha chip back in the early 90s, and the proprietary Unix vendors are no strangers to them either.
The ESA announcement of the 90s was not a major change at all, nor was the repackaging of the MVS operating system as OS/390, but embracing 64 bits is a significant modification.
Well in many cases, the answer might very well be hardly anything at all, especially given that the 64 bit support relates to REAL storage support rather than VIRTUAL storage support.
www.aig.qc.ca /mvs/zseries.html   (544 words)

  
 Technorati Tag: 64-bit
Compare and Save on 64 Bit Compare prices on 64 bits from a wide variety of reputable merchants, plus read user reviews.
64 Bit Find Deals on 64 Bit and other Computer Components at DealTime.
64 Bit at Smarter.com Find 64 bit at Smarter.com.
www.technorati.com /tag/64-bit   (477 words)

  
 OCModShop: 64 bits Frequently Asked Questions
For the crib sheet to that, 64 bit Integer calculations are one of the things that make 64 bit CPUs so great - they can make 64 bit calculations in hardware rather than emulating it with a bunch of 32 bit calculations.
They use 64 bit addresses and truncate them internally to save on die space.
The 40 bit physical memory addressing means a maximum of 1 TB physical memory, coupled with 256 TB of logical address space (this includes virtual memory and allows for tons of large, contiguous blocks of unused address space).
www.ocmodshop.com /ocmodshop.aspx?a=242   (466 words)

  
 LWN: The 64-bit question
In general, I think a 64 bit distro should be able to support a 32 bit runtime in parallel.
So instead of going full 32/64 bit mixed mode amd64 in one big step pure64 was started to get 64 bit support fully available with minimum impact to sarge.
You are a developer, and you want to create and test binaries for both 32 and 64 bit system without rebooting.
lwn.net /Articles/89825   (1722 words)

  
 64-bit computing in theory and practice - The Tech Report - Page 1
Read on for our take on the move to 64 bits, including a look at the performance of the latest CPUs in Windows XP Pro x64 Edition with both 32 and 64-bit applications.
The essence of the move to 64-bit computing is a set of extensions to the x86 intruction set pioneered by AMD and now known as AMD64.
In order to help you navigate through the hype, we nabbed a pair of 64-bit processors from AMD and Intel and tested them with the latest release candidate of the 64-bit version of Windows XP.
techreport.com /reviews/2005q1/64-bits/index.x?pg=1   (995 words)

  
 AnandTech: Windows XP 64-Bit Preview: First Look at Athlon 64 Performance
Epic was demonstrating UT 2004 64-bit at the release of the Athlon 64 last September, and by all reports the performance was amazing.
The Athlon 64 quickly distinguished itself as the Gaming CPU with its outstanding performance in almost every 32-bit game.
AnandTech: Windows XP 64-Bit Preview: First Look at Athlon 64 Performance
www.anandtech.com /systems/showdoc.html?i=1961&p=4   (864 words)

  
 Adaptec Article: PCI, 64-Bit and 66-MHz Benefits
Since the OS plays a huge role in system performance by addressing and transferring data to and from memory, when the OS supports only 32-bits when the hardware supports 64 bits, the system is still somewhat limited.
To create a 64-bit driver, you must modify the DMA descriptors to address 64 bits of memory so the hardware can access the pointers to the data in this memory range.
During an address phase, AD[64::32] is used to send the upper 32-bits of a 64-bit address or during a data phase, an additional 32-bits of data.
www.adaptec.com /worldwide/product/markeditorial.html?prodkey=pci64bit&cat=/Technology/SCSI/&type=SCSI   (2144 words)

  
 InformationWeek 64-bit Windows Gates' 64-Bit Pitch April 25, 2005
With 64 bits, it's blue sky above: 128 Gbytes of RAM and a potential for 16 terabytes of virtual memory.
www.informationweek.com /story/showArticle.jhtml?articleID=161501499   (1188 words)

  
 BBC NEWS Programmes Click Online 64-bit launch showcases Longhorn
Crudely the amount of bits a system can use describes how much information it can take in or manipulate with each tick of the very fast clock that helps co-ordinate everything a computer does.
And to many people's surprise, just after it announced the new Windows 64, it presented a work in progress of the next version of Windows - code-named Longhorn.
Brad Goldberg says: "With Longhorn we're trying to enable people to both work with their PC the way they are comfortable working with it today, yet enable them to do dramatically new things.
news.bbc.co.uk /1/hi/programmes/click_online/4521013.stm   (838 words)

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