Linked Questions

3
votes
2answers
6k views

How do I find out if my computer has PAE using Linux? [duplicate]

Possible Duplicate: What do the flags in /proc/cpuinfo mean? I tried installing CentOS 6.3 on my computer only to see a complaint that my computer doesn't have PAE. I am not sure if my computer ...
23
votes
5answers
29k 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?
17
votes
4answers
18k views

32-bit, 64-bit CPU op-mode on Linux

I'm confused. Running Fedora Linux, lscpu yields: Architecture: i686 CPU op-mode(s): 32-bit, 64-bit ... But when I try to install a 64-bit program (Chrome) I get error like: ...
29
votes
2answers
14k views

What does the “bugs” section of /proc/cpuinfo actually show?

On a Debian Stretch and testing/Buster system with a current kernel and installed microcode I still see meltdown and spectre listed as bugs in /proc/cpuinfo. However, running the spectre-meltdown-...
11
votes
3answers
3k views

How do I check if my CPU supports x86-64-v2?

AMD, Intel, Red Hat, and SUSE have defined a set of "architecture levels" for x86-64 CPUs. For example x86-64-v2 means that a CPU support not only the basic x86-64 instructions set, but also ...
6
votes
4answers
4k views

Does Arch Linux work on i386 cpu architecture

Does Arch Linux work on my i386 cpu. I read on its website that it's optimized for i686, does it mean Arch Linux won't work on i386. By the way, I don't want to compile it, I want to use the ...
5
votes
2answers
5k views

How to use a 64-bit CPU in KVM?

According to tests the Mac Mini 3,1 CPU is 64-bit (grep -q "^flags.*\blm\b" /proc/cpuinfo) and supports Intel virtualization extensions (grep -q "^flags.*\bvmx\b" /proc/cpuinfo). However, after ...
13
votes
1answer
4k views

How to determine CPU features on PowerPC and Power 8 (and above)?

We can examine /proc/cpuinfo on Intel and ARM machines to learn cpu features, like AES and SHA. I need to do the same for PowerPC under both AIX and Linux. Testing with Linux is shown below. The ...
2
votes
1answer
534 views

Why do I get different cpu flags in /proc/cpuinfo between CentOS 6 and CentOS 7?

CentOS 6.9 showed the following CPU flags in /proc/cpuinfo: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss syscall nx pdpe1gb rdtscp lm ...
4
votes
1answer
121 views

How to know if a AMD cpu's SME feature is enabled?

More recent AMD CPUs have a feature named Secure Memory Encryption SME which if available can be explicitly be enabled by adding this parameter to linux' command line. mem_encrypt=on (according to ...
1
vote
0answers
458 views

CPU MSR dumper tool

I'm looking for a linux tool similar to a cpuid dumper but with a capability to read all of a processor's possible model-specific registers's and outputting them. Does such a tool exist? I'm hoping ...
4
votes
1answer
186 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 ...
0
votes
1answer
49 views

Detect if the computers hardware is capable for a 64bit system?

I'm more and more getting into trouble with my Debian 32 bit system, since some software such as the signal messenger are not written for 32 bit anymore. Operating System: Debian GNU/Linux bullseye/...
0
votes
0answers
40 views

CPU flags from the Intel ME or AMD PSP

In the /proc/cpuinfo, we can see a number of CPU flags regarding one's own hardware, providing information regarding the processor instructions set (cf What do the flags in /proc/cpuinfo mean?). Is ...