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12
votes
7answers
3k views

Are binaries portable across different CPU architectures?

I am a newbie on Linux and my goal is to be able to develop for embedded linux. I have experience on bare-metal embedded systems using ARM. I have some general questions about developing for ...
1
vote
3answers
52 views

Chroot into a different architecture?

I have a filesystem image that's going to be used for an ARM processor, but I want to install some things on it first, like a Desktop, etc. So I want to mount the filesystem on my Linux machine and ...
1
vote
1answer
64 views

Why is 64bit Ubuntu running Slower? [closed]

I have 2 mostly identical machines, and Acer and a Lenovo, both with Intel Atom 230 CPU @ 1.60GHz and 1GB of DDR2 RAM. The acer has a fresh install of 64Bit Ubuntu 14.04 LTS while the Lenovo has the ...
8
votes
1answer
457 views

Why is my system architecture i386 on a 64-bit processor? [closed]

Recently, a small message appeared on my Gmail, notifying me that my google chrome version isn't compatible anymore. So I tried to update my chrome (I didn't take care about my chrome version from ...
1
vote
1answer
84 views

Understanding the top command output on an ARM multicore computer

Ran the top command to check CPU performances and memory usage on the New RPi3 while running a browser. Since we have a 4× ARM Cortex-A53, 1.2GHz, how should I read the result? $ top Mem: 327132K ...
2
votes
1answer
52 views

Difference between architecture and platform in linux kernel

I want to know the difference between architecture and platform in Linux kernel. When I had downloaded the latest kernel tarball, observed that a directory named with arch, it contains different names ...
7
votes
1answer
115 views

Debian: what instructions do x86-64 binaries use?

I'd like to know whether binaries use (are compiled for) special instruction sets like SSE 4.1/4.2, AVX, F16C or not. How can I find out whether a binary in a package uses certain instruction sets? I ...
2
votes
1answer
606 views

Added i386 support for wine, removed it now I can't remove the architecture

I've previously added i386 support in order to install wine32 with: sudo dpkg --add-architecture i386 Now I don't need wine32 anymore and removed it, then wanted to remove the i386 architecture ...
3
votes
2answers
1k views

how to find out intel architecture family from command line

I get access to some xeon machines for checking performance. I want to find out what architecture they are using such as Haswell, Sandybridge , Ivybridge. Is there a command to find this out?
-1
votes
2answers
475 views

How do I find out if my processor is 32-bit or 64-bit? [duplicate]

I am currently running a 32-bit OS, but I'm not really sure if I have to. According to some articles on the Web, there are no flags in my output that indicate that my CPU is a 64-bit. But according to ...
2
votes
2answers
326 views

Meaning of hardware platform in uname command ouput

man uname -m, --machine print the machine hardware name -i, --hardware-platform print the hardware platform or "unknown" What exactly is meant by hardware platform here and how ...
1
vote
1answer
120 views

Get list of supported opcodes

Is there a way to get a list of supported opcodes for a given architecture? Such as a listing in /proc similar to /proc/cpuinfo.
0
votes
2answers
220 views

Writing a Script to match the architecture of system and software

I am trying to write a script where it will cross check to things: 1.The architecture for which the setup file was intended (32 or 64 bit) 2.The Architecture of the system. The second part is quite ...
1
vote
1answer
278 views

Socket and Core information - How do I check empty sockets?

I am trying to grab the number of sockets and core information. Till now I found that one socket can have multiple cores. http://rcritical.blogspot.com/2010/09/finding-cpu-socket-and-core-using.html ...
2
votes
1answer
116 views

How to get all CPU cache information without SU access

I am trying to find out the cache mapping scheme for all the levels of class of a linux server, however I do not have root access. I would just use DMIdecode for this but you need root access. Is ...
2
votes
1answer
1k views

Easy command line method to determine specific ARM architecture string?

I'm trying to write a script which will determine actions based on the architecture of the machine. I already use uname -m to gather the architecture line, however I do not know how many ARM ...
3
votes
2answers
185 views

Test if valid executable

Is there a (relatively) simple way to test if an executable not only exists, but is valid? By valid, I mean that an x86_64 Mach-O (OS X) executable will not run on an ARM Raspberry Pi. However, ...
2
votes
2answers
526 views

Need help finding the CPU id numbers to use with cpu sets

The man for cpuset doesn't seem to clearly list how to figure out which numbers map to which processing units. My current machine has two Intel Xeon E5645s, each of which has 6 cores and ...
16
votes
2answers
17k views

What is the difference between i686 and x86_64 packages?

I have a machine with both glibc i686 and x86_64, and a very annoying problem with glibc. Is it normal to have two libraries of the same name installed on one computer? How can I know which library ...
0
votes
1answer
329 views

What is the difference between ARM architecture and ARM core? [closed]

I read the data sheet of the TI - DM385 , in which they have mentioned as: ARM Cortex-A8 Core - ARMv7 Architecture What's the difference?
4
votes
1answer
136 views

Find out if CPU supports dynamic speed setting

I need to find out in my script if a (potentially legacy) CPU supports dynamic speed setting, and eventually get value of maximum and current speed. What makes it more complicated is that I need to ...
7
votes
2answers
5k views

64-bit kernel, but all 32-bit ELF executable running processes, how is this?

The output from uname: root@debian:~ # uname -a Linux 5asnb 2.6.32-5-amd64 #1 SMP Mon Jun 13 05:49:32 UTC 2011 x86_64 GNU/Linux However the /sbin/init executable shows up as 32-bit: root@debian:~ #...
4
votes
2answers
7k views

32-bit vs 64-bit vs ARM in regards to programs and OSes

So when I run Raspbian (basically a ARM Debian derivative with LXDE), I can install any normal package using aptitude. But if, for example, I wanted to download a .deb file, I would have to choose 32-...
3
votes
1answer
111 views

Is there a tool that I can use to create a diagram of my system's architecture?

I'm looking for a tool that can create both graphical files as well as text based ASCII representations of my system's CPU & motherboard architectures.
6
votes
2answers
13k views

Is there a way to dump a CPU's CPUID information?

I'm familiar with lshw, /proc/cpuinfo, etc. But is there a method for getting at a CPU's CPUID opcode?
-1
votes
1answer
353 views

Is the ELF format bound to a CPU architecture or not? [closed]

If you go through wikipedia it states that "ELF is flexible and extensible by design, and it is not bound to any particular processor or architecture." Then why are there so many packages like ...
0
votes
0answers
240 views

Differences between Chromium OS overlays?

In the ChromiumOS source, there are currently the following build overlays offered: overlay-amd64-corei7 overlay-amd64-drm overlay-amd64-generic overlay-amd64-host overlay-arm-generic overlay-...
0
votes
1answer
65 views

Debian package available for ia64 but not for x86_64?

I want to download aptitude to build it from source on my 64bit machine. It is a Thinkpad with a normal x86_64 CPU, nothing special. The download page only has: alpha amd64 armel armhf hppa hurd-...
20
votes
4answers
10k views

Is there a system command, in Linux, that reports the endianness?

Does anyone know of a command that reports whether a system is Big Endian or Little Endian, or is the best option a technique like this using Perl or a string of commands? Perl # little $ perl -...
2
votes
1answer
497 views

debootstrap from Intel Atom (i686) to AMD Sempron (AMD 64)

I'm working on setting up a minimal Debian install on a USB stick, and am just trying to wrap my head around debootstrap and differences in architectures. I want to create a system to run on AMD64 (...
4
votes
3answers
2k views

default wordsize in UNIX/Linux

I was inspecting the preprocessed output of my C program and happened to look at the header file wordsize.h It is located in /usr/include/i386-linux-gnu/bits/wordsize.h the file contains only one ...
2
votes
7answers
867 views

Determining Linux architecture from files

I have a system with an unrecoverable /usr partition. Terrified the drives are going bad, I've got it booted into a LiveCD environment, and I can't remember what the install architecture was, the ...
3
votes
1answer
6k views

How to get past “Loading Initial Ramdisk” hang after going from x86_64 to i686 cpu

Long story short, I have a Ubuntu 12.04 64-Bit Server setup as a virtual machine with VirtualBox (4.1.18). I migrated the guest machine from an AMD chipset (a gaming machine) to an Intel Xeon (server ...
2
votes
1answer
1k views

Huge page and performance improvemnt

How can using huge page improve performance? I have read that huge pages improve performance by reducing TLB lookups and reducing the size of the page table. Can someone tell me how this helps with ...
2
votes
1answer
4k views

Can one install an armel Ubuntu package on armhf Ubuntu system?

My particular concern is about installing "coq" in Ubuntu 12.04 for Toshiba AC100 (armhf distro), which hasn't been built successfully for armhf, but is available for armel -- https://answers....
8
votes
3answers
2k views

Difference between “machine hardware”, “processor type” and “hardware platform”

My Linux machine reports "uname -a" outputs as below: [root@tom i386]# uname -a Linux tom 2.6.9-89.ELsmp #1 SMP Mon Apr 20 10:34:33 EDT 2009 i686 i686 i386 GNU/Linux [root@tom i386]# As per man ...
53
votes
8answers
155k views

How to determine Linux kernel architecture?

uname -m gives i686 and uname -m gives i686 i386 output in Red Hat Enterprise Linux Server release 5.4 (Tikanga) machine. I need to install Oracle Database 10g Release 2 on that machine. So, how can I ...