Questions tagged [central-processing-unit]

The central processing unit (CPU) is the portion of a computer system that carries out the instructions of a computer program, to perform the basic arithmetical, logical, and input/output operations of the system. The CPU plays a role somewhat analogous to the brain in the computer.

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the value of cpufreq-info -w and cpufreq-info -f are very different

Environment: # uname -r 5.15.0-91-generic # lscpu Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Address sizes: 52 bits physical, 57 bits virtual Byte Order: ...
xiaojueguan's user avatar
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How to get the CPU micro-architecture name on virtual machines running in the cloud?

I have some servers (VMs) running on Digital Ocean, and I'm looking to retrieve the name of the CPU architecture, I know it's Intel but I guess that the information is not easily available. Here is ...
 Annis99's user avatar
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How do I increase Threads per core for an Ubuntu VM in VMware?

I recently purchased a VMware dedicated server and I created my first VPS on it with Ubuntu 22 server OS . Using lscpu in Ubuntu , I'm seeing the following : steam@steam:/root$ lscpu Architecture: ...
lostsoul6's user avatar
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AWS Graviton Processors: which encryption specs are hardware accelerated?

In testing Graviton instances there seems to be significantly more CPU overhead from AES/SHA functions compared to the same on cheaper/smaller Intel/AMD instances. Do these procs supports hardware ...
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Performance governor does not set the maxmum frequency

I am trying to use the governor on performance mode, but everytime I check the frequency values I see a frequency less than the CPU frequency. I am using a Intel(R) Xeon(R) CPU E5-2650 v4 @ 2.20GHz $ ...
herox's user avatar
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CPU spikes on Ubuntu using RunCloud / AWS Lightsail

I am regularly getting alerts from my AWS Lightspeed server for high CPU usage. The configuration is 2vpu, 4gb ram, 80gb ssd. I use RunCloud for server management and have around 10 very low traffic ...
WP Shala's user avatar
-3 votes
1 answer
274 views

Why should I choose Xeon or Epic when Ryzen are way faster? [closed]

I'm selecting 2 servers to run a world-facing web application for a customer. One will host the web server, the other the DB. I can choose between Xeon and Ryzen CPUs and.. oh, my! Xeons are way more ...
Dr. Gianluigi Zane Zanettini's user avatar
2 votes
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Dynamic CPU allocation/scaling in QEMU KVM

How can I dynamically allocate/scale CPU resources to my QEMU VM according to the workload of the VM? Would this require a script? Is it even possible to change CPU allocation at runtime? I have a ...
Anm's user avatar
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Copied/Imported Xen Server VM can't see all CPUs?

I have installed a new Xen Host Server with more cores. I attempted both a copy and import of the VM from the old Host. When I attempt to increase the CPUs, the option only shows me what was available ...
ATG's user avatar
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Ubuntu 22.04, Intel Xeon E5-2640 v3, getting "Illegal instruction" and "core dumped" error from apt

I have Ubuntu 22.04 Server, running on Intel(R) Xeon(R) CPU E5-2640 v3 @ 2.60GHz When trying to install packages apt complains about unment dependencies and suggests running apt --fix-broken install: #...
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Is there any tool or any way to get all processes which are queued in windows?

Is there any tool or any way to get all processes which are queued in windows? i have value of CPU Queue very high i have few apps running on server. the CPU Queue continue to reach sometimes 3000, ...
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Bridge interface causes high CPU utilization

We are facing a weird issue with a server we have on our laboratory. Specifically, the server shows high CPU utilization from low priority processes (blue color in htop) with 50% of the cores ...
Dimos Masouros's user avatar
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How to get cpu hardware id on Android systems?

I need get CPU voltage and temperature from /sys/class/hwmon but need find the CPU ID to find the correct directory, by example: $ ll /sys/class/hwmon/hwmon2/device lrwxrwxrwx 1 root root 0 sep 3 13:...
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CPU hardware: more cores means lower frequency at some point? [closed]

When taking a look at intel processor product list for servers, it seems like there is a correlation between the base frequency and the number of cores. Take this list, there is no processor with base ...
mihca's user avatar
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What is the AMD equivalent of Intel’s Node Manager

I’m looking to better understand server telemetry. On all platforms Intel currently provides more robust telemetry with a separate on-dye processor called node manager: https://www.intel.com/content/...
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Installing Hyper-V on Windows Server 2022 reduces host system CPU to 1 core 1 thread

Bit of an odd situation, I've installed Windows Server 2022 (desktop experience) on a server, installed MegaStorage MSM and the relevant drivers from Supermicro and any Windows updates. When I install ...
Intk's user avatar
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Run a docker container over 2 physical computers

It is possible with docker cli to limit the number of CPUs for running container (--cpus option)? It it possible to change this limit when the container is running? Or should I delete the container ...
Bob5421's user avatar
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CLI Tool for Machine Stats

Are there good CLI utilities to see things like CPU, RAM, and Network Traffic over time? I know CPU can be looked at via a command like top but curious if there is any way to collect historical trends ...
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Can CPUs run with constant boosted speed?

My default AWS server CPU speed is 2.5GHz but somehow I did manage to boost it to 3.1GHz. However, when I run watch -n.1 'cat /proc/cpuinfo | grep -i mhz' they are not constantly working with 3.1GHz. ...
korimusk's user avatar
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Why are server CPUs so weak and expensive? [closed]

So looking at CPUs with good single core performance. One example would be AMD EPYC 73F3 which is (according to passmark) on par with Ryzen 5950X, but 10 times more expensive and it's rated over x2 ...
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MariaDB High CPU load after Crash

I have a problem with MariaDB 10.3.16. I was trying to convert a rather large table (26GB) from MyISAM to InnoDB and unfortunately the disk space ran out during this process. When it got full, it ...
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Uneven CPU usage with NGINX

On my CentOS 7 server, the load on each core is unequally distributed, as seen in the screenshot: some nginx worker seem to take way more load than other. irqbalanceis enabled, hyperthreading disabled....
NicoAdrian's user avatar
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Does configuring BIOS really solve ESXi CPU Contention?

There's alert coming up on our server saying CPU Contention even if we already isolate that VMguest from another high CPU consuming VMguest: Alert Definition Name: Virtual Machine on a host with BIOS ...
VR-4's user avatar
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VPS performance apparently low - how can I verify?

I apologize wholeheartedly but this is probably as unspecified as it can get as for a question. I run a linux VPS and...I think it has an important performance problem, but I can't pin point what it ...
unsafe_where_true's user avatar
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How to calculate CPU utilization for an application in a multicore system

On 8-core server, 0-3 are configured as isolcpus and remaining cores (4-7) are available for system and user processes to run. My application has multiple processes which will run on any one of the ...
surya's user avatar
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How can I get my CPU to run at maximum speed by circumventing CPU scaling? [closed]

I am running CentOS 7 (7.9.2009) (kernel 3.10.0-1160.49.1.el7.x86_64) on a rather old laptop (Lenove T61) with a dual core CPU (Intel(R) Core(TM)2 Duo CPU T7300 @ 2.00GHz). The driver for CPU scaling ...
Mitch's user avatar
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2 answers
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Hardware errors in either CPU or RAM, what to do?

I have a server that, every now and then reports Hardware Errors to the OS, but otherwise runs without any noticeable issues. Today I found this while walking by the monitor attached to it. Can anyone ...
EaranMaleasi's user avatar
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How to calculate the QuickPath Interconnect (QPI) bandwidth?

For Xeon E5-2697 v2, Intel lists: Bus Speed = 8 GT/s # of QPI Links = 2 According to Wikipedia, one must know the QPI frequency and link width to calculate the QPI bandwidth, but these don't seem to ...
MWB's user avatar
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Why does server throw Q Code 19 only when both CPUs installed?

I've got two identical intel CPUs in an Asus board with one stick of ram each. On power up, board immediately throws code 19 ("SB initialize before installed memory"). I've tested each CPU ...
Hover Horse's user avatar
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what are the risks when mixing different DELL servers and how to know supported rhel versions

we are using the following DELL servers and this server is part of the cluster SERVER - R730 we want to add new servers as R740 to our cluster ( R740 is with Intel Xeon Silver 4110 8c Processor) so ...
King David's user avatar
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1 answer
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Websites getting down every day on VPS Server

I have a VPS server using 4 CPU and 4GB RAM shared across 10 PHP websites of which 2 website(website and set cron jobs) are using sometime more than 6 CPU core of 4 CPU core available. And because of ...
Zinal Shah's user avatar
1 vote
1 answer
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high CPU usage of MySQL and recommendation from Mysqltunner

we have noticed that our database server is getting so high CPU (more than 90 % used by mysqld process), the output of mysqltunner is shown below, can you help me please, i'm okay about the ...
Hamza AZIZ's user avatar
3 votes
1 answer
2k views

Setting CPU frequency to hardware minimum limit - will it harm the hardware?

I'm running on a Intel Celeron N4120. I can easily set the CPU governor for all 4 cores to powersave using: for n in {0..3} do sudo cpufreq-set -g powersave -c $n done Now, using cpufreq-info I ...
q-codes's user avatar
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vCPU/pVCPU Calculation

I am trying to calculate the vCPU/pVCPU information in Dell PowerEdge MX740c using the Intel Xeon Gold 6148 Processor (SKU 6148) with Hyperthreading. Does this seems correct? pCPU Calculation (# ...
Andre's user avatar
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Can Intel Turbo Boost frequency for all cores be lower than the base frequency?

The Intel Xeon 6208U CPU is advertised to have a base frequency of 2.9 GHz and Turbo Boost frequency of 3.9 GHz - but that is for one core, which is not very useful (and IMO, highly misleading). I'm ...
EM0's user avatar
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1 answer
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worker_processes value for Nginx/Openresty running on Kubernetes

Based on the documentation here, https://nginx.org/en/docs/ngx_core_module.html#worker_processes The worker_processes is defined as the number of worker processes. The optimal value depends on many ...
Kshitij Joshi's user avatar
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1 answer
762 views

Why one of the cores is running full on (100%) during development? [closed]

I'm developing an app (Python) which uses face recognition and OpenCV libraries. I can see even after the app finished processing one of the cores keeps running full on for another 10 mins or so. ...
Mark's user avatar
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KVM Ubuntu host - Ubuntu guest: high cpu playing youtube videos

Goal is to lower cpu load in an Ubuntu 20.04.2 vm when playing youtube videos. OS is Ubuntu 20.04.2 for host and kvm guests. Cpu is intel i7-3820qm @ 2.70ghz - ivy bridge - 4 cores - 8 threads. Have ...
Alexander Sofianos's user avatar
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2 answers
1k views

Load average explanation for multi-core systems

I'm trying to understand the Load average in my Debian system. I've read some explanations of the displayed values and I came to understand that the number represents how "overloaded" my ...
Get Schwifty's user avatar
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CPU frequency in KVM vps

Is it possible to display CPU max and min frequency in a KVM vps using Libvirt on server ? It only shows CPU mhz in vps and not max and min mhz as seen on server in lscpu command output.
Jevin Gala's user avatar
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Intel Skylake Gold 6154 CPU genuine or Engineering Sample? Intel Diagnostic tool passes but CPU-Z and HWInfo shows "ES"

I am testing a GPU Compute Server (ASUS ESC8000 G4) with 2 Intel Xeon Gold 6154 CPUs and I ran the newest version of the Intel Diagnostic Tool (IPDT, Version 4.1.4.36.W.MP) and the tool passes all ...
Matt's user avatar
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matching second hand cpus for dual cpu system

I have a need to replace some CPUs in an HP DL360 server (g8 or g9 I believe). FWIW the new CPU will be V1 or V2 E5-26xx CPU's (most likely E5-2697v2 or similar - something that gives the maximum ...
davidgo's user avatar
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2 votes
2 answers
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Dual Intel Xeon E5-2670 (current) vs AMD Ryzen 9 3900 (new box), for combined web/database server

Due to upgrading from Centos 7 to 8 (no in-place upgrade is supported) I need to get a new dedicated server. Naturally, having had the current one a few years, an upgrade would be nice. The question ...
Codemonkey's user avatar
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Does high cpu load make apache reject incoming requests?

I am deploying a laravel app on a RHEL7.x server with apache as the underlyiing web server. Part of the functionality of the application is to accept http POST requests from other servers and save ...
jharme's user avatar
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What is a software prefetcher (processor setting)?

Configuring the CPU(s) of a DELL Server (via iDrac) I have run accross the term software prefetcher. I have an idea that prefetching is to "fetch" in advance data from the memory in to the ...
fraleone's user avatar
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Unable to get access IMPI / BIOS / Intel Xeon Gen2 compatibility issue?

I've bought new( not used ) SuperMicro MBD-X11DPI and x2 - Intel Xeon Silver 4210R OEM Micron [MTA72ASS8G72PSZ-2S6E1] 64Gb Samsung [M393A8G40MB2-CTD] 64Gb When I'm booting, 10 different ...
raZV8grEkesXk's user avatar
1 vote
0 answers
408 views

KVM heavy CPU usage

I have own kvm on my dedicated server. I create five kvms. On one of them I have problem with CPU. Sometimes top looks like that: TOP image ps aux show a one procces which use 100% of all available ...
Tom Furca's user avatar
1 vote
1 answer
716 views

Server performance upgrade for 500 users [duplicate]

I have an application(Moodle platform) with 50 users. The actual performances of the server are: RAM is 2 GB Storage is 10 GB CPU is AMD 2.1 GHz with 2 Core The server is hosted in amazon, instance ...
3UMF's user avatar
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2 votes
2 answers
240 views

Replacing HP ML30 G10 Processor

Dears, I currently have the HPE ML30 G10 with Intel® Xeon® E-2124 processor installed in it. I wonder if it is possible to replace the processor with Intel® Xeon® E-2288G or Intel® Xeon® E-2236 ...
Aboodnet's user avatar
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347 views

Could an incompatable Xeon processer cause only two of four RAM slots to be used?

Issue With everything installed correctly, only two of my four RAM sticks are being recognized with the BIOS. I checked the QVL for the motherboard, and the Xeon E5-2628L v3 that I am using is not ...
Ehryk's user avatar
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