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64-bit vs 32-bit
- Thread starter Synonym
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ah ha!
"...[edit] Windows XP Professional x64 Edition
This edition supports the x86-64 extension of the Intel IA-32 architecture. x86-64 is implemented by AMD as "AMD64", found in AMD's Opteron and Athlon 64 chips, and implemented by Intel as "Intel 64" (formerly known as IA-32e and EM64T), found in some of Intel's Pentium 4 and all of Intel's later chips.
Windows XP Professional x64 Edition uses version 5.2.3790.1830 of core operating system binaries, [21] the same version used by Windows Server 2003 SP1 (and Windows XP 64-bit Edition version 2003) as they were the latest versions during the operating system's development. Even service packs and updates for Windows XP x64 and Windows Server 2003 x64 are distributed in unified packages, [22] much in the manner as Windows 2000 Professional and Server editions for x86.
During the initial development phases (2003â2004), Windows XP Professional x64 Edition was named Windows XP 64-bit Edition for x86 Extended systems and later, Windows XP 64-bit Edition for Extended systems, as opposed to 64-bit Edition for Itanium systems.
..."
from http://en.wikipedia.org/wiki/Windows_XP_Pro_x64#Windows_XP_Professional_x64_Edition
So are we not getting Server 2003 by purchasing XP Pro X64?
"...[edit] Windows XP Professional x64 Edition
This edition supports the x86-64 extension of the Intel IA-32 architecture. x86-64 is implemented by AMD as "AMD64", found in AMD's Opteron and Athlon 64 chips, and implemented by Intel as "Intel 64" (formerly known as IA-32e and EM64T), found in some of Intel's Pentium 4 and all of Intel's later chips.
Windows XP Professional x64 Edition uses version 5.2.3790.1830 of core operating system binaries, [21] the same version used by Windows Server 2003 SP1 (and Windows XP 64-bit Edition version 2003) as they were the latest versions during the operating system's development. Even service packs and updates for Windows XP x64 and Windows Server 2003 x64 are distributed in unified packages, [22] much in the manner as Windows 2000 Professional and Server editions for x86.
During the initial development phases (2003â2004), Windows XP Professional x64 Edition was named Windows XP 64-bit Edition for x86 Extended systems and later, Windows XP 64-bit Edition for Extended systems, as opposed to 64-bit Edition for Itanium systems.
..."
from http://en.wikipedia.org/wiki/Windows_XP_Pro_x64#Windows_XP_Professional_x64_Edition
So are we not getting Server 2003 by purchasing XP Pro X64?
Quote from cokezero:
You might run into a lot of compatibilitiy issues if you go 64bit. Of course that depends on what software you use but chances are down the road you would run into a piece of software you must have that doesn't support 64 bit.
My solution is to go for windows 2003 server enterprise edition. It's 32 bit but supports up to 32GB of memory using Physical Address Extension (4bits extra for addressing). Windows 2003 server has the same core as windows XP and software compatibility is excellent. Unless the software you use is specifically designed not to support windows server (such as antivirus software, they make you pay more for server OS) you're unlikely to run into compatibility problem.
I bought a Dell 2900 server with windows 2003 server enterprise for trading purpose and is very happy with this configuration. Windos 2003 server enterprise cost an arm and cost as much money as the server hardware but I think it's well worth the money.
As I understand it, a program has to be specifically written to take advantage of memory using physical address system and only some database programs are, ordinary programs such as Tradestation cannot benefit, right?
Quote from mokwit:
As I understand it, a program has to be specifically written to take advantage of memory using physical address system and only some database programs are, ordinary programs such as Tradestation cannot benefit, right?
In general that is not correct. Java software doesn't care if it's 32 bit or 64 bit - just run the correct JVM. C/C++ software in general SHOULD be portable between 32 bit and 64 bit. But it must be compiled for the appropriate target architectue. This is just a matter of giving a target directive to the compiler. Physical addresses are not used (and should not be used) - the operating system takes care of that.
Vast amounts of free software is available for linux distros such as Ubuntu in both 32 and 64 bit flavours and in most cases the source code is the same and it is just compiled with appropriate compiler C/C++ compiler command lime switch.
If a program wants lots of memory, then it just keeps asking the OS for more. Eventually the OS will refuse but the limit will be higher on a 64 bit box. The application programmer does not need to make any special changes to their code for each of the environments.
Quote from mokwit:
As I understand it, a program has to be specifically written to take advantage of memory using physical address system and only some database programs are, ordinary programs such as Tradestation cannot benefit, right?
I believe a single process can only address 2GB of memory with or without PAE. If it's loaded with the /3GB switch then it can address 3GB.
PAE is only advantageous when you run multiple processes.
Do you want to know what the difference between a 64bit processor and 32bit processor is?
32 bit processors can process 2^32 bits per second.
64 bit processors can process 2^64 bits per second.
To use a 64 bit processor for a system that will be purely used for trading is like killing a bug with a nuclear bomb.
So unless you are performing complex mathematical calculations that require hours or even days to process, Donât get drawn into the hype of a 64 bit processor and pay extra for something that you will never use to even its 20% potential.
32 bit processors can process 2^32 bits per second.
64 bit processors can process 2^64 bits per second.
To use a 64 bit processor for a system that will be purely used for trading is like killing a bug with a nuclear bomb.
So unless you are performing complex mathematical calculations that require hours or even days to process, Donât get drawn into the hype of a 64 bit processor and pay extra for something that you will never use to even its 20% potential.
I want to save some money. Where can I buy a 32 bit processor?Quote from balzano:
Do you want to know what the difference between a 64bit processor and 32bit processor is?
32 bit processors can process 2^32 bits per second.
64 bit processors can process 2^64 bits per second.
To use a 64 bit processor for a system that will be purely used for trading is like killing a bug with a nuclear bomb.
So unless you are performing complex mathematical calculations that require hours or even days to process, Donât get drawn into the hype of a 64 bit processor and pay extra for something that you will never use to even its 20% potential.
Quote from balzano:
Do you want to know what the difference between a 64bit processor and 32bit processor is?
32 bit processors can process 2^32 bits per second.
64 bit processors can process 2^64 bits per second.
To use a 64 bit processor for a system that will be purely used for trading is like killing a bug with a nuclear bomb.
I'm assume you're joking with respect to processing speeds of 2^32 and 2^64 above.
Processing speed and throughput is a function of clock speed, memory speed, cache and memory configuration, etc, and not the size of the addressable memory space of the CPU/MMU.
The biggest benefit of 64 bits is the larger address space assuming you're on a 64 bit OS (Linux or W2003 for instance). 64 bit also helps the virtual memory subsystem significantly.