Although assembling a computer is not difficult, but DIY hardware collocation is still a lot of novice friends more headaches. For example, CPU with what motherboard issues, how to match the compatibility and cost-effective solutions. Some netizens think to check CPU interface and motherboard slot is very troublesome, and the cost-performance aspect also is not good to handle. Today's small series to bring
These two days to assist operations to locate 1 monitoring program CPU occupancy rate of 150%, the process twists and turns, the conclusion is simple, very interesting:)First, let's look at the high CPU:You can see the red box of the monitoring program CPU consumption is very high, but in fact, the implementation of these monitors is very simple: Send 1 HTTP requests, receive a response after a simple judgm
Mpstat
Mpstat is the abbreviation of multiprocessor statistics, a real-time system monitoring tool. Some statistical information about the report and CPU, which is stored in the/proc/stat file. In a CPUs system, it is not only possible to view the average information of all CPUs, but also to view information about a particular CPU. The biggest feature of Mpstat is the fact that you can view the statistics
First, optimize the CPU in the BIOS
1, open CPU level two cache
For some special motherboards, some features of the CPU are not turned on by default, and they need to be turned on in the BIOS, such as internal CPU cache and Hyper-Threading technology. The way to open the internal cache for the
In order to make the computer more diligent work, first must maintain the computer the CPU Oh. Since the CPU is the heart of the computer, it operates continuously from computer startup to shutdown.
Heat dissipation CPU work with the production of heat, heat dissipation must be less, the normal operating temperature of the C
When using the top command, we will see this line: What do the values in it mean? I was asked this question today and found that the answer is not very clear. Sure enough, the most frequently used top commands every day are still unknown... Shame... So I checked some information: The official explanation of Cpu (s) indicates cpu information. The meaning of each value is: us: usercputime (or) % CPUtimespenti
We 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 identifier of the logical processor.
(2) physical id: including the unique id
0. Prepare knowledgeHyper-Threading Technology (hyper-threading): Using special hardware instructions, the two logical cores (CPU core) are simulated into two physical chips,Allows a single processor to use thread-level parallel computing, which is compatible with multi-threaded operating systems and software, reducing the idle time of the CPU and improving the efficiency of
Add by Zhj: Here's a good explanation of what WA means in the top command, and we know that when Io is blocked, the operating system changes the process to a blocking state, and the CPU is scheduled to run other processes.When the CPU is idle, it checks for blocked IO (disk or network), and if so, it is WA; if not, that is the real idle. In the top command, 85.1%id is the true idle ratio, and has the follow
Php code for obtaining CPU usage
Share a few php code to get the cpu usage in the current system. if you need it, give it a reference.In php, you can use getrusage () to obtain CPU usage. this method is only applicable to linux systems. Example:
0 [ru_inblock] => 0 [ru_msgsnd] => 2 [ru_msgrcv] => 3 [ru_maxrss] => 12692 [ru_ixrss] => 764 [ru_idrss] =
have been thinking about whether the program deliberately let the thread run on the specified CPU, which can improve operational efficiency, so specifically to write a code for CPU usage to draw a sine curve experiment, I use the AMD X4 641 CPU, four core four threads of the film.The code is as follows#include"stdafx.h"#include#include#include#includeusing namesp
Use an automated shell script to find detailed thread information used by the CPU.
After some interceptor code is added to the project, the CPU alarm shows that the CPU usage exceeds 100%;
If you want to find out which code consumes too much resources, find a blog post on the Internet and repost it as follows:
Http://blog.csdn.net/guixunlong/article/details/84508
In Linux, we know thatNice, reniceCommands change the execution priority of processes, and high-priority processes give priority to execution, so as to ensure the running of important tasks to a certain extent.
In addition to Nice and renice, you can use CPU affinity to specify the processors on which processes are running. CPU affinity indicates the tendency of a process to run on a given
From http://blog.csdn.net/Treeyan
In fact, it is not original. The materials are mostly from the Internet through Google.
Some time ago I bought a hp-dv1702 laptop, core Single Core CPU, 5400 turn hard disk, watch a movie very good. the core CPU supports the speedstep technology. When you are not busy, it always works at around 800 MHz, with a low calorific value. The BIOS sets the fan start temperature to
To adjust the use of a CPU for a program:
First, use Taskset to make full use of multi-core CPU, so that the utilization of the CPU is balanced to each CPU
#taskset-P, set an existing PID instead of reopening a new task-C, specify a processing, you can specify multiple, comma-delimited, or specify a range, such as: 2
CPU, generally think that write-C + + needs to understand, write high-level language (Java/c#/pathon ...) There is no need to understand the underlying stuff. I thought so at first, but until I met Lmax's disruptor, as well as Martin's blog post, I found that Java was more than a CPU to ignore. After a period of reading, hope to summarize their reading after the sentiment. This paper mainly talks about the
This article primarily records the Tomcat process, which causes the CPU to take up too high a number of problems with TCP connections. Problem Description
Under Linux, a Tomcat Web service has a very high CPU footprint and the top display results over 200%. The request cannot be answered. Repeated restart is still the same phenomenon. Problem Troubleshooting 1. Get process information
The JPS command provid
Starting with Java 5, the JDK provides some JVM detection APIs, a well-known java.lang.management package that provides many Mxbean interface classes that are easily accessible to the JVM's memory, GC, Thread, lock, class, Even the operating system level of various information, this article simply introduces a Java process using JMX CPU, heap memory use of monitoring. Some people may feel that there is no need to do this, because tools such as jconsol
Recently, the company server has always been cpu100% occupied, the server is configured as dual-core xeon3.0x2,2g ECC memory.
The discovery is that w3wp.exe takes up a large amount of CPU for a long time. This situation should be caused by the death cycle of the website program.
You can temporarily limit the w3wp process CPU usage before you find a problem to ensure that the site can work:
Under IIS6, frequ
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