Questions tagged [multi-core]
The multi-core tag has no usage guidance.
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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 ...
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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 ...
1
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1
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Multiprocessor and 20.04
I just upgraded my bi-Xeon server with 20 cores/proc (i.e. a 40 cores server) from 18.04 to 20.04 and now the system is only viewing 1 processor!
The BIOS is correctly seeing the whole system (2 procs,...
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2
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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 ...
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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 | ...
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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 ...
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1
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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:
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2
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558
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Multiprocess per single core
I have 6 cores and want to run 12 processes in the same time in parallel .. I'm using mpirun but sucked and confused in the option that I will use for multiprocess per core .. the command of 6 ...
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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 ...
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AMD Ryzen 5 3600 + Ubuntu 20.04 problems
I have Ryzen 5 3600, Gigabyte X570 GAMING X and Radeon RX 580 Series.
I installed Ubuntu 20.04 and it is loaded with kernel parameter 'acpi=off' but now system recognize only 1 core(lspcu, cut /proc/...
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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
...
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1
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How do I disable a specific CPU core at boot?
I have a 16 core Intel Xeon processor that successfully boots into the BIOS and GRUB, but fails to load Ubuntu (or any operating system). It turns out that core #14 is the cause of all the issues (...
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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 ...
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How do I backup my file system with tar and multi-thread?
I would like to backup my file system and do it with parallel. I found this guide: https://help.ubuntu.com/community/BackupYourSystem/TAR
Where they give me the command:
tar -cvpzf backup.tar.gz --...
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2
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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 ...
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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-...
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2
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How can one restrict the number of CPU cores each user can use?
We have a computer whose CPU has 32 cores and it's going to be used for running programs by a few different users. Is there any way to restrict the number of cores each user can use at any time so ...
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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 ...
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457
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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?
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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 ...
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1
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How to list PIDs (procesees) for one CPU core only?
One CPU core is running at 100%
I have one CPU core running at 100% for a minute and then it drops to about 5%. Immediately after that a different CPU core starts running at 100%:
Using bash and ...
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5
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2
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Unable to use all cores or threads
There are several threads on this subject, however none seem to help in my specific predicament. As the title suggests, I am unable to take advantage of all four cores and threads on my Intel i5-7600T ...
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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 ...
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Ubuntu using/enabling only 1 of 4 cores?
CPU: Intel Core i7 870 ... number of cores = 4
I installed Ubuntu 17.04 64-bit (twice; and even tried Ubuntu MATE 17.04 64-bit - same thing). It seems that only 1 of 4 cores is used:
$ lscpu
...
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3
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Why does my CPU only primarily use one core?
It loads 100% from one of the CPUs at a time. Is that on purpose? Shouldn't it try to do 25/25/25/25?
It's an Intel i5-3320M - 2,60GHz x 4
My friend on a win10 is load-balancing 'correct' loading ...
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3
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5k
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unzipping multiple files at once
I have thousands of .zip files in one folder, I want to extract those using command or script, each .zip file to it own folder.
I wish to run the unzip process multiple times.
How can i do that?
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1
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How to enable 256+ cores in Yakkety Server
Yakkety Server uses generic kernel flavor. It is 4.8.0 Linux kernel.
While running on Intel KNL processor I cannot see cores above 256.
user@ubuntu02:~$ grep processor /proc/cpuinfo | wc -l
256
...
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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 ...
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How to force "archive manager" (file-roller) to use all cpu cores?
I am using Ubuntu's Archive Manager (file-roller) to compress (tar.gz) some large files and directories.
Often this takes a long time, because this program uses just one of my eight CPU cores.
Is ...
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1
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Any way to multithread dpkg-deb
Compression for a 500MB deb takes a long time. I still need the compression. Is there anyway to multithread it?
There's pxz, pigz, pbzip2. Is there any way I can get dpkg-deb to use one of these. Or ...
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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 ...
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Applications running slower with multiple threads
I have a 40-core server running Ubuntu 14.04 LTS. I am using an application with multithreading capability. I find that running the application with increasing numbers of threads improves run time ...
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2
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778
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problem during installing multi2sim simulator
I'am new to ubuntu and when I'am trying to install multi2sim I get this error:
CXX WorkItemIsa.o
WorkItemIsa.cc: In member function ‘void SI::WorkItem::ISA_V_CVT_I32_F32_Impl(SI::Instruction*)’...
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How to make Hyper tread on in Ubuntu 15 linux
What is terminal command to make 'on' a hyperthread in Ubuntu?
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Which programs on Ubuntu support 8 processor cores? [closed]
I'm now using the Ubuntu virtual machine through Google Cloud service with 8 processor cores. I want to check if these cores work simultaneously. For doing that I have to run such program which ...
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Intel Core i7-3612QM multi-core CPU not being utilised properly
I have a Dell Inspiron 7520 with an Intel Core i7-3612QM CPU that repeatedly cycles through 100% usage of each individual core while barely using any other core as shown in the screen shot below.
...
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Disable multicore in Ubuntu14.04
In windows 7 msconfig can disable different cores of the Operating System after a restart as per this link.
Is there a similar option in ubuntu that can explicitly disable all cores but one?
user464934
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Start windows application with single core in wine
I am trying to run Broken Sword 4 in wine on Ubuntu 14.04. It installed perfectly. However, the usual blackened character problem occurs. This is caused by multicore CPUs. So I have to explicitly ...
user464934
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3
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Indicator displaying current CPU frequency and usage
Unfortunately, it seems that cpufreq indicator is only showing an icon indicating proportional frequency instead of precise number I would like to see.
Is there any indicator showing actual CPU ...
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1
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Does the Linux OS run on one core in multi-core system?
If I use a multi-core processor computer, does the Linux OS run on one core or is it distributed to multiple cores? (I know that scheduled processes can be executed on multiple cores.)
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Cores vs Threads: How many threads should I run on this machine?
How many threads should I run on this machine?
My lscpu says there are 96 cores. Are those physical cores? What is the maximum and optimal thread that I can run on this machine?
https://...
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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....
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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 ...
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Not all cores registered, Ubuntu 14.04 i7-2630QM
I'm not sure when this happened, but for some reason my processor is only using two out of 4 physical/8 logical cores.
I've tried to remove acpi=off from /etc/default/grub with no luck. I've changed ...
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1
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Gimp uses only one CPU when applying a Gaussian Blur
If I use "Selective Gaussian Blur" in Gimp, only one CPU gets used. My PC has four.
Is there a way to tell Gimp to use all available CPUs?
Some operations take quite long, and this would reduce the ...
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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.
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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 ...
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avconv on multiple threads
Is it possible to run jobs on multiple processor or threads to speed up avconv?
Is there a feature in progress, if not I wonder why?
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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. ...
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How to limit users to N cores?
I have an SSH server where users login to do various tasks. The problem is I have 4 cores, and one user is running tasks on 4. How can I limit the number of cores any given user can use?
This is not ...
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