32bit vs 64bit

Thread Tools Search this Thread
Top Forums UNIX for Dummies Questions & Answers 32bit vs 64bit
# 1  
Old 07-26-2002
32bit vs 64bit

Whats the difference between 32bit and 64bit OS's or applications. I understand it a little but its just not clicking the way the teacher explained to me

thanks, any info would be much appreciated
# 2  
Old 07-27-2002
All OSes can can process 32-bit and 64-bit numbers (actually, even longer ones). And, if the hardware supports, say, 64-bit integers natively, then it is possible for a compiler to support those instructions on any OS.

But, what one usually means by a "64-bit OS" is that the OS itself exploits the newer features of a 64-bit processor. That is, if native data moves are in 64-bit chunks, then the OS moves data that way. If a huge amount of memory can be addressed, then the OS can use it. If device drivers can be faster because of higher bandwidth, then the OS has such drivers. And so on.

But, even on such an OS, whether applications use the "64-bit features" is entirely up to the design of the program and/or the compiler that's generating the code.
Marc Rochkind
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. SuSE

Libcap.so.2 for SuSE 10 (32bit)

Hello, I am trying to use a worktool on SLES 10 (32-bit) and it is saying I do not have libcap.so.2: error while loading shared libraries: libcap.so.2: cannot open shared object file: No such file or directory Is there an easy way for me to install this library? A quick Google search... (4 Replies)
Discussion started by: bstring
4 Replies

2. Shell Programming and Scripting

maintain 32bit and 64bit C code

Hi, I have a C code which builds and works fine on 32bit linux machine. Now i want to convert that code to build and run on 64 bit linux machine. I dont want to maintain two separate sources for 32 and 64 bit build. Same source should get build on 32 as well as 64 bit machine (when a... (2 Replies)
Discussion started by: bhushan123
2 Replies

3. Solaris

Compiler - 32bit or 64bit?

Hi Gurus, I need to check whether the compiler installed in my system supports 64bit compilation. Server - Sun fire v490 OS - Solaris 5.9 Processor - Sparcv9 (64bit) Install Directory - /opt/SUNWSpro Compiler Model - Sun Forte C Compiler. My development team is claiming that there... (20 Replies)
Discussion started by: Hari_Ganesh
20 Replies

4. Red Hat

Pthread problems, 32bit vs 64bit

I have an application which builds and executes without error on a 32bit implementation of Linux. When I transferred the code to a new project on a 64bit implementation, the code will build without error, but the pthread functions, such as pthread_attr_setschedparam() return an 'Invalid Argument'... (3 Replies)
Discussion started by: jpelletier116
3 Replies

5. Solaris

32bit or 64 bit

Not really a Unix question as such :o, but what advantages or disadvantages are there between using 32bit or 64bit applications on a T5220 running Solaris 10? What about mixing them e.g. 64 bit app using 32 bit libraries or vice versa? (1 Reply)
Discussion started by: JerryHone
1 Replies

6. Solaris

32bit / 64bit issue with x86 solaris

i have solaris 10 x86 64bit installed on my pc (dell 3100). i then decided to move my hard drive to another pc (dell 4600). I noticed that each time i boot up, the OS show as 32 bit (instead of 64bit) and i can't even get past this stage to the login page. when i moved it back to dell 3100 it... (13 Replies)
Discussion started by: seyiisq
13 Replies

7. Programming

32bit to 64bit conversion.

Is there an 'easy' way to convert 32Bit code to 64Bit code. I have this benchmark i need to run on different machines and it would be nice if i could run it on the 64 bit machines ass wel. The output when compiling(1) and running(2) are the following: (1) linux:/home/user1/subbench/heapsort #... (7 Replies)
Discussion started by: demuynckr
7 Replies

8. Linux

Linux version v.s. 32bit/64bit

Where can I get a list that maps the each Linux version to corresponding 32/64 bits model? e.g. OS -> Model (ILP32, LP64, ...) RHLE3 -> ? RHLE4 -> ? RHLE5 -> ? ... It would be better if there is such a list that contains most of current UNIX OS versions. ... (1 Reply)
Discussion started by: princelinux
1 Replies

9. Linux

Linux 32bit or 64bit

Hi, I want to know what is command to know which will tell wheather linux is 32 or 64 bit (5 Replies)
Discussion started by: manoj.solaris
5 Replies

10. UNIX for Dummies Questions & Answers

64bit- or 32bit- processor

when using the command : cat /proc/cpuinfo I get some basic info back on the cpu.. but it doesn't tell me if I am using a 64 or 32 bit processor .. a) is this the right command to find this ? b) if it is not what is ? and how do I get that information.. thanx moxxx68 (2 Replies)
Discussion started by: moxxx68
2 Replies
Login or Register to Ask a Question