topic Re: CPU bits in Operating System - HP-UX

CPU bits

prasadb — Tue, 15 Apr 2008 03:46:24 GMT

hello all,
i want some information about the CPU. i wonder to know that if my system is 64 bit then does it mean that the CPU is also 64 bits.
kindly help and thanks in advance..

Re: CPU bits

Venkatesh BL — Tue, 15 Apr 2008 04:03:58 GMT

Check this: http://en.wikipedia.org/wiki/64-bit

Re: CPU bits

Prashanth Waugh — Tue, 15 Apr 2008 04:14:58 GMT

Hi,

pls try
getconf KERNAL_BITS.
As per my knowledge sytem is 64 bits means
cpu processing speed is 64 bits

Thanks

Re: CPU bits

Torsten. — Tue, 15 Apr 2008 04:23:34 GMT

From my prehistoric workstation:

# getconf KERNEL_BITS
32

unless you have a system let's say at least 8 or 10 years old you should see "64" as a result.

Re: CPU bits

prasadb — Tue, 15 Apr 2008 04:28:03 GMT

output of getconf KERNEL_BITS on my machine is 64. so please let me know which one is more advanced 32 bit or 64. please remove my confusion..

thanks all for replying and givin their valuable time..

Re: CPU bits

Sajjad Sahir — Tue, 15 Apr 2008 04:28:50 GMT

u can use getconf command for to see it
man getconf
a lot of options u can find there

data1# getconf KERNEL_BITS
64

Re: CPU bits

Torsten. — Tue, 15 Apr 2008 04:34:08 GMT

It would be easier to suggest something if you would post more information about your system, example:

# echo "sel dev all;info;wait;il"|cstm

capture the output and post.

Re: CPU bits

Sajjad Sahir — Tue, 15 Apr 2008 04:35:38 GMT

systems like pa-8000 is used 32 bit kernel
but later systems using 64 bit kernel
so 64 bit is better

Re: CPU bits

Kapil Jha — Tue, 15 Apr 2008 04:36:57 GMT

Hello prasad,
64bit is faster and powerfull than 32 bit CPU.
First of all if ur system is 64bit it only means that u have 64bit CPU.

64bit CPU means it can process 64bits at a time same with 32 bit so it means 64 bit CPU can do double work in same time what a 32 bit CPU can do.

1) When programs are written to support 64-bit processors, those programs will generally perform faster than on a 32-bit processor of the same speed. This is partially because 32-bit computers must handle 64-bit numbers in two steps, whereas 64-bit computers only need to use one step.

2) 64-bit processors can address more memory than 32-bit processors. This means your server can have more RAM, and therefore can store more data in memory, making memory-intensive programs like databases faster.

from Google.... ;)
BR,
Kapil

Re: CPU bits

Torsten. — Tue, 15 Apr 2008 04:45:54 GMT

>> 64 bit CPU can do double work in same time what a 32 bit CPU can do

Sure?

;-)

SCNR

Re: CPU bits

Venkatesh BL — Tue, 15 Apr 2008 04:54:31 GMT

64 bit means better addressiblity. You can see that most of the basic binaries on the system still are 32 bits. This is because, if not programmed properly, the application may show poor performance on 64 bits. The source code has to handle the various data types (esp longs, pointers etc) to ensure correctness.

Re: CPU bits

Venkatesh BL — Tue, 15 Apr 2008 04:58:17 GMT

Here is the official link that explains things: http://docs.hp.com/en/5966-9887/ch03s04.html

Re: CPU bits

Rasheed Tamton — Tue, 15 Apr 2008 05:02:45 GMT

Hello Prasad,

print CPU HW Support:
getconf HW_CPU_SUPP_BITS

print Kernel Support:
getconf KERNEL_BITS

Regards.

Re: CPU bits

prasadb — Tue, 15 Apr 2008 05:30:56 GMT

Thank you all for thei precious help and valubale time :-)

Re: CPU bits

Dennis Handly — Tue, 15 Apr 2008 06:22:30 GMT

>Sajjad: systems like PA-8000 is used 32 bit kernel

While some PA8000 could still run 32 bit kernels, the whole idea of PA2.0 was to be 64 bit.

Re: CPU bits

prasadb — Mon, 21 Apr 2008 10:18:17 GMT

thanx all for thei vauable support..