The processor architecture of most PCs and servers, including the 386/486/Pentium/… (IA-32) 32-bit family and the amd64 64-bit family. Most x86 processors are made by Intel or AMD.
3
votes
1answer
53 views
Real mode and loading linux kernel confusing
As far as know, protected mode will activated in kernel and in grub stage it still real mode. My misunderstanding is: In real mode, total memory available for use is less than 1MB but how grub can ...
3
votes
3answers
1k views
How do I know that my CPU supports 64bit operating systems under Linux?
How can I find out that my CPU supports 64bit operating systems under Linux, e.g.: Ubuntu, Fedora?
7
votes
4answers
22k 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 ...
0
votes
2answers
54 views
Ubuntu 10.04 on 64bit
I need to download the 64bit version of Ubuntu 10.04,
I found this link http://releases.ubuntu.com/lucid/
and select this option:
PC (Intel x86) desktop CD
But it is x86? And the other 64bit ...
6
votes
2answers
134 views
Is there a command or method (other than RTFM) to determine if a system has a UEFI BIOS?
My inspiration for asking this is this other question on Ask Ubuntu.
One reason I am asking is that I am just curious. I would like to know more about this for whatever value it might have in the ...
3
votes
2answers
34 views
Running -march optimized software on another architechture?
I'm running an Athlon64 server with LFS and would like to have a local copy of the server in a virtual machine for testing purposes and building software.
My PC uses an i7 and the existing server ...
6
votes
1answer
231 views
Files bigger than max(off64_t) on Solaris, eg “/proc/../as”
How do I read or seek from a file that's bigger than the maximum off64_t? The problem arises because the address space of a process is represented in the /proc/.../as file, which is a huge sparse file ...
2
votes
2answers
689 views
Linux and Android apps on ARM vs x86
There are a plethora of low-cost ARM-based mini-devices coming out (Cotton Candy, etc). Some of these are Android-only, some Linux-only, and some allow both operating systems to run.
The only issue ...
6
votes
1answer
182 views
Can I run multiple cores at different clock speeds?
I see the cores on an Intel i5 machine I'm looking at can only be run at the same clockspeed: /sys/devices/system/cpu/cpu1/cpufreq/related_cpus lists all of the CPUs. Setting cpu1's clockspeed changes ...
1
vote
1answer
127 views
Installing GRUB from scratch
I am trying to make a scratch linux installation on a PC board that has an x86 processor running on it. It also has a compact flash drive on it to which I have copied my compiled kernel image. The ...
3
votes
2answers
349 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 ...
2
votes
0answers
486 views
32 bit appplication on 64 bit linux not working
I'm running linux mint LMDE 64 bit version, I have to install this i386 software to use my modem.
So I did it with --force-architecture mode, installation completed with errors.
Here is the log
dpkg: ...
5
votes
2answers
924 views
Which Fedora CPU architecture should I choose? i386 or i686?
I have an old Thinkpad X32 which has an Intel(R) Pentium(R) M processor 1.80GHz based on the result of cat /proc/cpuinfo and I was wondering which is better to use on it, the i386 or the i686 version ...
0
votes
0answers
157 views
Undervolting in Linux
Could you recommend me something different like Linux-PHC for undervolting in Linux?
I would like to undervolt my AMD Phenom 9850 CPU. I am using Debian squeeze x64.
For underclocking I use ...
6
votes
2answers
260 views
Overclocking tools in Linux
I am trying to overclock my machine. All the changes are made on the BIOS level, but then one needs to check all the temperatures, voltages, etc and test the stability of the overclock. Most tutorials ...
2
votes
1answer
167 views
Where is max process size specified?
I've got a RHEL4 machine with 1TB of memory and have discovered that malloc and mmap refuse to allocate any memory above 512GB. Meanwhile, I don't seem to have a problem with RHEL5 machines. I'm ...
5
votes
1answer
212 views
Compiler flags for mplayer2 to optimize it for old hardware
I just compiled mplayer2 from source (git://git.mplayer2.org/mplayer2-build.git) because the repository (ubuntu 12.04) version didn't work on my system. Since I have old hardware I was just wondering ...
2
votes
0answers
136 views
How many rings does OpenBSD use?
Usually a Windows/Linux operating system uses afaik max 2 rings
But how many rings does OpenBSD use?
0
votes
0answers
21 views
All Memory not showing up [duplicate]
Possible Duplicate:
64-bit Linux doesn’t recognize my RAM between 3 and 32 GB
I have installed Oracle Linux 6 on my alien-ware desktop. I have 9GB of DDR3 Ram on the board and the board ...
1
vote
1answer
265 views
Which “Processor family” to choose under “Processor type and features”?
I have recently compiled a minimal kernel for my Intel(R) Pentium(R) Dual CPU T3400 @ 2.16GHz, and chose CONFIG_MCORE2 (Core 2/newer Xeon) under "Processor type and features > Processor family"
I ...
5
votes
1answer
714 views
Load Linux bzImage in QEMU?
I compiled a Linux by doing "Make menuconfig" then make and now I have compiled the most recent version of Linux. How can I load the kernel into QEMU?
20
votes
2answers
6k views
What do the flags in /proc/cpuinfo mean?
How can I tell whether my processor has a particular feature? (64-bit instruction set, hardware-assisted virtualization, cryptographic accelerators, etc.) I know that the file /proc/cpuinfo contains ...
2
votes
1answer
167 views
Which edac module should I enable here?
I got a Intel(R) Core(TM) i5-2450M CPU @ 2.50GHz CPU here , not sure which module should be enabled for EDAC:
Chipset: Inter Coporation 6 Series/C2000 , driver in use: i801_smbus
1
vote
1answer
588 views
AES-NI accelerated ZFS v31 encryption in Solaris 11
I'm not quite sure if this is the right place to ask this, if not, feel free to migrate it to wherever it fits in.
I'm testing the encryption feature in ZFS v31 in a Solaris 11.11.11 VM under ESXi ...
3
votes
1answer
375 views
Do I have PCLMUL instruction set support?
Here are the flags from /proc/cpuinfo:
fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc ...
4
votes
0answers
136 views
How to make linux 'perf record' work for libc and libstdc++ symbols?
I'm using perf record -g on x86-64 Linux to profile a program. Several symbols in libc or libstdc++ have 0 as a parent: __GI___strcmp_ssse3 (libc) and strcmp@plt (libstdc++) for example. (I can ...
9
votes
1answer
784 views
How can I determine if my processor is 64 or 32 bit? [duplicate]
Possible Duplicate:
How do I know that my CPU supports 64bit operating systems under Linux?
I am running Debian Squeeze, how can I determine whether my processor is 64 or 32-bit? I'm ...
19
votes
2answers
1k views
Is it possible to compile a full Linux system with Intel's compiler instead of GCC?
Perhaps this is a stupid idea? Maybe there are some compatibility issues?
I have the impression that for Intel-based systems, the Intel compiler would potentially do a better job than GCC. Perhaps ...
1
vote
1answer
66 views
Find alternative for Debian 5 to work with big files
I have a problem using find
find ./ -mtime +7
Value too large for defined data type
because of 2 Gb file (backup) on x32 VDS and it is not possible to reinstall OS.
I need to remove old files ...
1
vote
0answers
153 views
i386 libtool conflicting with x86_64 libtool when installing Handbrake
I've been trying to install Handbrake on centos 5.8 with the help of some different guides. I'm running x86_64, and whenever I try to install packages necessary to build the binary, the arch ends up ...
5
votes
1answer
323 views
User Kernel split in 64bit Linux
What is the default user/kernel split in the 64bit linux ?
I read Documentation/x86_64/mm.txt (which someone pointed out), but I could not make out. Can somebody provide a direct answer (something ...
10
votes
2answers
2k views
Why does my system show only 3.2 GiB of RAM when I definitely have 4.0 GiB
I have 2x2 GiB sticks of RAM installed.
Running memtest86 from the grub boot menu confirms this.. memtest86 reports no errors.
However every which way I check my available memory in a running ...
-1
votes
1answer
306 views
Gifsicle on CentOS? x86_64
I am trying to install Gifsicle on my server which is CentOS x86_64. I do not know which package to use or how to install it. Can someone with experience help me out?
http://www.lcdf.org/gifsicle/
2
votes
2answers
308 views
Fedora 15 i686 report only 2.6 GB RAM
I have laptop Asus N53SV with 4 GB of RAM, i7 with integrated card and dedicated GPU. My problem on Fedora is that system reports only 2.6 GB RAM. I know that I should use kernel with PAE but even ...
2
votes
1answer
915 views
What determines whether an interrupt is IO-APIC-edge or IO-APIC-level?
Looking at the contents of /proc/interrupts on an x86 Linux, I see that some of the interrupts are IO-APIC-edge while others are IO-APIC-level.
I wonder what determines the interrupt type, is it the ...
4
votes
1answer
742 views
Use aes-ni in Debian
I am considering building a small home server. I'd like to encrypt some folders on this server, therefore using the instruction set aes-ni which is supported by newer (mostly Intel) chips would be ...
