Linux command ---- analyze CPU bottlenecks to measure CPU performance indicators: 1. CPU usage; CPU running regular user processes CPU running nicedprocessCPU running real-time processes 2. CPU usage; for IO management: interrupt
Since Intel's 90um technology was launched, its new CPU does not use the previous clock speed to mark the CPU, but uses a number to mark the CPU, which causes Intel's CPU to have a model problem, intel uses this product to fully cover the high-end and low-end markets, but it also raises the consumer's blind choice of
View CPU information in CentOSWe can use/proc/cpuinfo to view CPU information. This file contains the data section of each processor on the system. There are six entries in the/proc/cpuinfo description for multi-core and super-thread (HT) technical checks: processor, vendor id, physical id, siblings, core id and cpu cores.(1) processor: including the unique ident
About CPU Cache--The program apes need to know.
This article will describe some of the CPU cache related knowledge that a program ape or it practitioner should know
Article welcome reprint, but reproduced when please retain this paragraph text, and placed on the top of the articleLu Junyi (Cenalulu)This text address: http://cenalulu.github.io/linux/all-about-
first, processor CPU knowledge
Classification of ①CPU
CPU brands have two camps, respectively, Intel (Intel) and AMD, the two industry bosses almost monopolize the CPU market, we take apart the computer to see, but also Intel and AMD brand (of course, not excluding the extremely small cottage of the
In QEMU/KVM, QEMU provides a simulation of the CPU, showing a certain number of CPUs and CPU characteristics of the client, and in the case of KVM Open, the execution of CPU instruction in the client has the hardware processor's virtualization function to assist the execution, which is very effective.QEMU/KVM provides the client with a complete set of hardware sy
Multi-core CPU
A central processor has two or more cores! Pretty Head, with two or more brains! However, the running speed is not double that of a single-core CPU, because a single-core CPU is 100% running, and a dual-core CPU is 60% multiplied by 2 running. It requires three cores, 50% multiplied by three cores, 40% m
During system maintenance, it may be necessary to review the CPU usage at any time, and to analyze the system condition according to the corresponding information. In CentOS, you can view CPU usage by using the top command. After running the top command, the CPU usage status is displayed in full-screen mode, and will be in the dialog-using top-based commands, you
Do not know if you have no sense, nearly one or two years of DIY hardware field, the CPU water-cooled radiator has a trend of increasing fire. Search on the Internet to know that, at present many manufacturers have launched a CPU water-cooled radiator, including the mainland manufacturers of the figure.
CPU water-cooled Radiator Why has the fire come
We just know the CPU frequency, the core number, two cache and other parameters can be, the higher the frequency of high-frequency operation, the core number of the more the better, two-level cache the more about good.
For graphics cards too, we just need to know the graphics card frequency memory and brand, the main frequency is also the speed of the graphics card, the higher the better, video memory is the display performance of the graphics card,
To solve the CPU usage is too high, first of all, we should understand what is the cause of high CPU, we mainly from the software and hardware to start with:
1, the software caused by the high CPU utilization rate
This is mainly related to system problems, such as the system is too bloated, open too many programs and computer virus Trojan, etc. will
Cause the CPU temperature is too high:
First, the ambient temperature
Virtual CPU
Especially in summer, CPU idle is its temperature can reach more than 50 degrees, full-speed work is more than 70, although this kind of temperature can be accepted in a short time, but if used for a long time, it will affect the life of the
/proc/pid/task directory. They are interfaces that read thread information./proc/cpuinfo fileThis file contains information about the CPU (model number, cache size, etc.).[Email protected] ~]$ Cat/proc/cpuinfoprocessor:0Vendor_id:genuineintelCPU Family:15Model:4Model Name:intel (R) Xeon (TM) CPU 3.00GHzStepping:10CPU mhz:3001.177Cache size:2048 KBPhysical id:0Siblings:2Core id:0CPU Cores:1Fdiv_bug:noHlt_bug
Meaning of cpu usage in linux top Command, linuxtop
Meaning of cpu usage in linux top Command[Respect for original articles from: http://www.iteye.com/topic/1110848]CPU usage of 0.3% us user space1.0% sy CPU usage in kernel space0.0% percentage of CPU used by processes that
The kernel often requests and frees a single page box. To improve system performance, each memory management area defines a per-CPU page box cache. All "per CPU" caches contain pre-allocated page boxes that are used to satisfy a single memory request made by the local CPU.Provides two caches per memory area and per CPU: a hot cache, which holds content contained
Do system operation, monitoring CPU is a frequent thing, then need to pay attention to what indicators?????Run Queue StatisticsIf you want to see how busy the CPU is, we can make a simple judgment by looking at the status of the process in the system, for example, by looking at the number of runnable processes and the number of blocked processes to CPU utilizatio
During system maintenance, it may be necessary to review the CPU usage at any time, and to analyze the system condition according to the corresponding information. In CentOS, you can view CPU usage by using the top command. After running the top command, the CPU usage status is displayed in full-screen mode, and will be in the dialog-using top-based commands, you
During system maintenance, it may be necessary to review the CPU usage at any time, and to analyze the system condition according to the corresponding information. In CentOS, you can view CPU usage by using the top command. After running the top command, the CPU usage status is displayed in full-screen mode, and will be in the dialog-using top-based commands, you
During system maintenance, it may be necessary to review the CPU usage at any time, and to analyze the system condition according to the corresponding information. In CentOS, you can view CPU usage by using the top command. After running the top command, the CPU usage status is displayed in full-screen mode, and will be in the dialog-using top-based commands, you
During system maintenance, it may be necessary to review the CPU usage at any time, and to analyze the system condition according to the corresponding information. In CentOS, you can view CPU usage by using the top command. After running the top command, the CPU usage status is displayed in full-screen mode, and will be in the dialog-using top-based commands, you
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