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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What does Process/CPU metric in atop really mean?
I've been using the excellent atop for reviewing load test impact in detail, and the distinction between the SystemLevel/CPU metric in the top (system-wide) section and the ProcessLevel/CPU metric in ...
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Consecutive CPU numbering on multi-socket NUMA Linux system
I've noticed that CPUs are numbered by Linux according to quite different schemes on different multi-socket NUMA systems.
I mean the CPU numbers you use in kernel parameters such as isolcpus= or when ...
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interpreting cpuinfo
I have to figure out what kind of cpu my HS20 have. Its /proc/cpuinfo output is below. Is that mean It has two IntelXeon units with two cores each ?
processor : 0
vendor_id : GenuineIntel
...
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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 ...
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Bad performance on better hardware
I have postgresql streaming replication on 2 hosts and I've faced with the problem of different performance compared between two servers. It looks like all sql queries on one host are slower on 70-90% ...
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What is QPI Isochronous Mode in x86 platforms?
I'm just wondering what exactly QPI Isochronous mode stands for? On some server motherboards, specially Supermicro ones there's one option that comes disabled by default under QPI General ...
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find out NUMA locality of process RAM
I am doing an application benchmark with multiple instances of the same application. I found out that pinning their processes (with sched_setaffinity under Linux, with TaskManager under Windows) to ...
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TCP packets dropped in ipv6 loopback
Just logged in to a Windows host, I noticed an unexpected CPU usage. I quickly found out the processor was being hogged by the Windows firewall services.
I enabled logging, and I started to see ...
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Automatic CPU load balancing for program or program group under Linux?
assume the following setup: system (Ubuntu 14.04 LTS) with 40 cores, lots of RAM. Additionally a program which is only partly multithreaded. That is, it constantly switches between running on multiple ...
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When I ssh to my oracle server, the CPU load reduces
I am facing strange issue on an Oracle server. The server is on high CPU load everyday for around 5hrs.
This starts everyday at around 03:46 AM and continues for next 5 hrs. CPU load reduces ...
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Ubuntu | Mysql Server 300-750% CPU
I have already done a lot of adjustments to the MySQL Configuration,
but unfortunately I always get back to time utilization very high CPU.
Multiple MySQL processes partially between 200-750% CPU / ...
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IIS Worker Process Thread Count
I've seen this question asked but the answer given was either insufficient or unrelated. I feel like this is a pretty simple question(s).
We have a Classic ASP app running on IIS7.5 on a Windows 2k8 ...
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WPF application issues on AMD CPU vs Intel
I'm not sure if I should toss this on SO or not, I don't think its code based, so I'll start here.
We are having an issue in the testing of our new product when using on an AMD CPU vs Intel. The app ...
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Debian 100% cpu every 30 minutes but not loggable?
I have a Debian 7 x64 machine running with Digital Ocean that has every 30 Minutes a 100% cpu usage for about 1 minute. A couple of days ago it stayed there for a couple of hours so the server finally ...
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IBM xSeries 306 CPU Speed
I have an IBM xSeries 306. The system has been flawless until a week ago. It's a Pentium 4 Dual Core CPU. The CPU speed is 3.20 gHz. Now, it shows 4.26 gHz or 2.16 gHz when the POST screen comes ...
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Dtrace Oracle show high fsflush on solaris 10
Solaris 10 - Oracle 11G in a zone
Running mpstat , i've noticed that one CPU was at 100% used every 5 seconds for 5 seconds while all other CPU were fine, in used but nicely spread.
1 0 0 0 ...
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ksoftirqd and events process high CPU load
Centos 6.9 (64gb Ram)
Running nginx, mariadb, php-fpm, iptables, java
The server is having random but frequent bursts of 100% system cpu load on only 1 core, crippling network connections to the ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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Limit processes resources usage with (PowerShell) script
(Sorry for duplicate of https://stackoverflow.com/questions/57704486/limit-processes-resources-usage-with-powershell-script)
I'm setting up a shared computer (up to 50 concurrent users) and I'd like ...
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mixing Intel CPU of same FCLGA socket type and scalability?
I have a 4 socket server, calling for FCLGA 2011-3.
It was built using four Intel E5-4667v3 (16 cores).
If one cpu fails, can it be replaced with one E5-4667v4 (18 cores) and still work with the 3 ...
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What does "Status: Populated, idle" in dmidecode output mean?
I have a dual-xeon HP ProLiant DL160 Gen8 server that I'm in the process of setting up, running CentOS 7, and I noticed in my dmidecode output that the second processor is listed as Populated, idle ...
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Which CPU is utilized when seraching a server from an end user machine?
When an end user desktop that is connected to a network runs a normal Windows Explorer search of a network location (\\server-name), which CPU is utilized? The CPU on the end user machine, or the CPU ...
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Any difference between "siblings" in /proc/cpuinfo and "threads" in intel official documentations?
/proc/cpuinfo provides such info:
...
vendor_id : GenuineIntel
cpu family : 6
model : 63
model name : Intel(R) Xeon(R) CPU E5-2630 v3 @ 2.40GHz
stepping : 2
microcode : 59
cpu MHz :...
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ProLiant DL580 G7 E7 Upgrade Issue version 2
I am responsible for ProLiant DL580 upgrade to four E7-4870 processors.
We are running Windows Server 2012 R2.
The situation is very similar to what has already been discussed here:
ProLiant DL580 G7 ...
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HP RX6600 - Possible Processor carrier board failure
So there is an HP Integrity RX6600 server, which simply cannot be turned on. When user power-on the chassis, It'll be hanged at POST process and cannot reach EFI and booting OS.
After reviewing logs (...
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Xeon 5649 doesn't POST in Supermicro X8DTE-F motherboard
I have a Supermicro board running dual Xeon chips for different little projects. When I originally put it together, I used l5520 chips that are still working in it. With the price drop of 1366 chips, ...
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Slow server performance. Is it the hardware's fault?
We recently ordered a new server machine to beef up page load times of the websites we are hosting. The hardware is provided and partially managed by a hosting company. The dedicated machine has two ...
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VMWare Host Processor Status persistent
We have a new Host that we just added and put a new VM on. There is a red exclamation point with the error Host processor status. It says to check the Hardware status tab for more details but there is ...
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Enable Resource Governor
I have setup an SQL Server 2008 R2 SP1 in my infrastructure. One of my SQL jobs consumes much CPU usage and when this happens all other queries take too long to respond.
After research I read about ...
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CPU Affinity for Linux VM
I have a Ubuntu Linux VM running on VMWare, and I have changed the CPU affinity for multiple processes using the taskset command. The VM has 16 cores allocated to it, and so does the actual server ...
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Inconsistent CPU load on debian
This server runs Apache2, Tomcat6 and MySQL.(if that makes any difference you tell me :)
Using htop i can see the cpu load on each of the 4 cores.
What I do not understand is witch processes are ...
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Dell 2970 Server dual Opteron 2435's_Ubuntu OS incorrectly reporting CPU's
The 2970 has BIOS version 4.2.1.
lshw -c processor gives me correct cpu information and core count = 12 cores.
cat /proc/cpuinfo and lscpu both give me 8 cores (incorrect).
OS = Ubuntu 14.04 LTS
I had ...
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Nginx/PHP5-FPM master process - high CPU usage
I've been having some weird issues with PHP-FPM and high CPU usage from the master process. I normally have CPU spikes from traffic since we have a lot of websites but I also run heavy caching with ...
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Mapping uWSGI processes to specific cpu cores
I have 2 sites on my server (debian) with 4 cpu cores.
For both of them I use workers=2 and cpu-affinity=1 so workers are
mapped to cpu 0 and 1 for both sites like that:
spawned uWSGI master process (...
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High CPU Usage and hangs randomly with HHVM
I'm using phpbb on Centos 7 with 512mb of ram and 1 core.
And I'm having randomly hangs and high cpu usage when I get some url of my clean phpbb installation.
This is my server.hdf file:
idFile = /...
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Single E5-1600v2 on Dual Socket motherboad
Is it possible to install one E5-1650 v2 on each node on twin 1U, dual socket supermicro 1027TR-TF server?
I know that E5-1600 series cannot run in dual socket configuration. The question is that ...
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Turbo boost is on even when CPU utilization is at 0 percent
My new server is behaving strangely, it seems that turbo boost is always on even when there's no utilization. The OS is windows server 2012 r2 and power option is set to balanced with default BIOS ...
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Website performance sluggish - High CPU and Disk Usage
Over the past couple of days my website's performance has been very sluggish, with queries taking a lot of time to execute. My CPU usage hit around 100% 4 times this week. Here is the output of top at ...
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HIGH CPU usage by PHP on a VPS Magento Server
My server running magento is 4gb ram and 4 core cpu. But still i am struggling with the high CPU usage. I only have 10 visitors at any given point of time. I am not sure if the PHP has to take this ...
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Why my amazon m1.small ec2 instance goes 100% everyday at exact time
Not sure what is happening, my instance goes 100% CPU usage two exact times during the day
one at 11:33 UTC and another at 3:38 otherwise rest of the day usage is under 10%.
I didn't find:
1. Any ...
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SNMP OID for CPU model information
I am currently trying to find the oid / way to gather the CPU model name from a server using SNMP. I have tried looking up the specific oid for it however all I could find were ones that related to ...
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Why does Ruby on Rails run slowly on VMWare
We are experiencing slow performance of our Ruby on Rails application on a hosted server.
Neither us nor our hosting provider have been able to accurately diagnose the reason for this.
Indicators of ...
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/sys/kernel/debug/tracing/per_cpu shows way more cpus than I have
I have 8 logical CPUs in my linux box. (As seen from /proc/cpuinfo). When I look in
/sys/kernel/debug/tracing/per_cpu
it shows 32 CPUs.
Why the difference? If it matters, I have hyperthreading ...
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Which CPU metrics are more important for a 3D render node?
We're looking into adding about 50 nodes to our render farm at about $2,000 (+-$300) each. What I'm trying to figure out is which specs on a CPU are the most important for 3D rendering. We use 3DMax ...
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Using Perfmon counters only, how can I determine host CPU contention / overload?
I'm running VMWare and have an ESX host that is running at 100% CPU. I also have two Exchange 2010 CAS servers that are running at 100% CPU,
Here are some additiona observations:
The sum of the ...
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