Questions tagged [multi-core]

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multi-core CPU usage

I am using the Windows Subsystem for Linux (WSL), and I am unexperimented in the capabilites of linux. Recently, I've been wanting to get better insight in the CPU usage of processes, but I am getting ...
Barbaud Julien's user avatar
4 votes
0 answers
9k views

How to enable all the cores available in ubuntu 18.04

When I executed the command: sudo lshw | grep core It's showing following output: cores:2 cores_enabled:1 threads:2 How can I enable both cores? (Ubuntu 18.04). Edit: No options visible in BIOS ...
karun j's user avatar
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3 votes
0 answers
186 views

At what point should I worry about high temperatures?

I just got a new system76 galago pro. It's nice. It has 8 threads and lots of memory. I do a lot of multicore computing in R, and a lot of my jobs are borderline between something that I'd do ...
generic_user's user avatar
3 votes
0 answers
138 views

One of my two cores suddenly flatlines at zero percent

I've been using Ubuntu for about three months, and twice now the first core of my dual-core laptop suddenly flatlined at zero percent for no apparent reason, while the second one seemed unaffected. ...
Wayward_One's user avatar
2 votes
1 answer
228 views

CPUs are overused with internet browsers, maybe Ubuntu+i5+JS don's work well

I'm having trouble with the Ubuntu 14.04 on PCs Intel NUC i5 8 GB RAM SSD HD. They are used mostly with Google Spreadhseets and are high usage of internet browsers and JS applications. PCs are quite ...
Emilio Nicolás's user avatar
2 votes
0 answers
3k views

Why aren't all of my CPU cores always detected in ubuntu 14.04 with an Intel Core Duo 2 CPU?

I'm using Ubuntu 14.04.2 LTS with kernel 3.16.0-38-generic #52~14.04.1-Ubuntu SMP Fri May 8 09:43:57 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux. Computer model: iMac Late 2009 ( https://support.apple....
SKp's user avatar
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2 votes
0 answers
128 views

Reserving a core for system processes to prevent wedging

I am working on a multi-core machine (running Ubuntu 14.04 server), where some programs seem to use up all resources causing wedging. Is there a way I can reserve one core for the os processes to ...
Devil's user avatar
  • 175
1 vote
0 answers
87 views

OS Schedules almost all work on a single CPU core after upgrading from Ubuntu 20.05 LTS to Ubuntu 22.05 LTS

As stated in the title, my OS automatically schedules almost all work on a single CPU core after upgrading from Ubuntu 20.05 LTS to Ubuntu 22.05 LTS. I've provided a few screen shots from htop to ...
samzapo's user avatar
  • 11
1 vote
0 answers
112 views

why the number of cores is different than expected?

I am trying this solution to a similar answer , in order to determine how many cores my systems have so I try the following commands 1) cat /proc/cpuinfo | grep processor | wc -l cat /proc/cpuinfo | ...
KansaiRobot's user avatar
1 vote
1 answer
361 views

AMD A10-4600M has 2 cores instead 4 problem!

I have Ubuntu 19.04(this problem occurs in 18.04 and 12.04 too), AMD-4600M processor. A lscpu command, settings and /proc/cpuinfo say that my processor has 2 cores, 2 threads, 2048M l2 cache. But I ...
Mihail HRS's user avatar
1 vote
0 answers
674 views

OS showing only one processor

I have 4 core processor but the system is only showing one core. Note: I am using acpi=off in grub entry. If I don't use it, my system crashes. What to do now? $ inxi -C CPU: Single core Intel ...
hrishikesh umralia's user avatar
1 vote
0 answers
984 views

How to forcefully run two thread on two cores

I have a C Code in linux, in which I have two Pthreads. What I have to do is that, I want every thread running on different Cores. For Example, I have two cores, so one thread should execute on core1 ...
Aniq's user avatar
  • 111
1 vote
0 answers
2k views

Support for cores revisions 0x17 and 0x18 disabled by module param allhwsupport=0

I was wondering if there is a fix for this problem, as every time I boot my laptop this message comes up. Is there any way to get rid if it? Thanks.
Nazir's user avatar
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1 vote
1 answer
493 views

How can I create ISOs quickly using all 16 cores of a Parallella board?

I have a large video collection (over 900 disks). Using Handbrake to rip to .mp4 is painfully slow, especially when ripping BRD. I found another solution that will play back ISOs, but I want to be ...
WayfaringStranger's user avatar
0 votes
0 answers
70 views

how to get dar with multi-threading enabled

I'm using a on a System76 Silverback desktop machine dual Xeon with 16 cores (32 hyperthreads) with large hard drives, and thinking to use dar(1) for my backups. I see that the man page mentions its ...
ForDummies's user avatar
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0 answers
54 views

Round Robin Query Reply

Hi Dear i set multipe ips on ubuntu 18 in netplan i want send any network dns qury on ubuntu by round robin protocol multiple ip first query by ip 1 second query by ip 2 third query by ip 3 How do ...
Ramin Malekghasemi's user avatar
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0 answers
400 views

Ubuntu 20.04 Multicore CPU scaling/frequency issues on i7-10510U

Firstly, I will state my specs: Intel i7-10510u with Intel UHD 620 graphics, AMD Radeon 610 dGPU, 256 GB Kioxia SSD,8GB RAM I have a Dell Vostro 3590. From my observations, individual cores do boost ...
thenemesis586's user avatar
0 votes
2 answers
480 views

How to manage number of cores used on my institution's server

I'm using a remote server where I'm not supposed to request more than 24 of the 100 cores. I'm running a couple of R scripts which seem to be using too many... How can I tell, in htop, how many cores ...
Michael Smith's user avatar
0 votes
0 answers
457 views

Parallel processing isn't working with multi cores in ubuntu 20.04

My laptop has 4 cores. Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Byte Order: Little Endian Address sizes: 39 bits ...
Abuthahir Karupadanna's user avatar
0 votes
1 answer
199 views

One CPU works more harder than others

Recently I have a problem with my CPU. Without opening any other program, a CPU starts working harder than normal. Characteristics:
Brian Maxi's user avatar
0 votes
1 answer
2k views

Why is Libreoffice using only one core?

When I use libreoffice calc for big table (around 100 000 lines), when I make operations on the filters, libreoffice freezes for some times while calculating, and i've seen in the CPU use that it's ...
limmt's user avatar
  • 41
0 votes
1 answer
640 views

Ubuntu 18.04 Xeon E5450 on p43-a7 socket 775 only one core working

I am new to Ubuntu, so i screwed something and idk what. After manually installing nvidia drivers, my Ubuntu recognize only one of four cpu cores. Architecture: x86_64 CPU op-mode(s): 32-...
Dario Lešćan's user avatar
0 votes
0 answers
502 views

Ubuntu automatically clean zombie and sleeping process

Is there a way how I can cleanup zombie process automatically? How can I clean up the zombie and sleeping process automatically?
jennifer ruurs's user avatar
0 votes
1 answer
498 views

Application does not display with Core i5 7400

I'm using a core i5 7400, no off board video card, the motherboard is Asus B250M-PLUS-BR, Ubuntu 16.4 16.10 or 17.4 which has the bug of not opening in the desktop some application, for example ...
Alexandre Silver's user avatar
0 votes
0 answers
674 views

How can I experience CPU steal time on co-existent VMs?

I've already had an Openstack cloud with two compute nodes each having 8 physical cores. I intend to make a scene that two or more VMs contend for the same shared core on a single host so CPU steal ...
Ali's user avatar
  • 93
0 votes
2 answers
665 views

my internet is suddenly slow

im running Ubuntu 12.10 and it works like a charm... but one problem, when i updated my software everything seemed OK until i noticed that my internet speed very slow. i had about 5-6 MBPS but it ...
user132482's user avatar