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
Many people in the process of using a notebook, often pay attention to their CPU performance, we will see the notebook CPU model behind the usual "U", "M" and other words, and "u" is the meaning of low pressure, "M" is the meaning of the standard pressure. Recently, a lot of net users of notebook CPU low-voltage and high-pressure difference is not very understand
Objective:Performance optimization is a commonplace topic, typical performance problems such as slow page response, interface timeout, high server load, low number of concurrency, database frequent deadlock and so on. Especially in the "rough fast" Internet development model of the big line today, with the increasing number of system access and code bloated, a variety of performance problems began to pour.There are three factors that can affect application performance at the system level:
In the absence of nagios monitoring software, as long as the server can be on the Internet, you can send mail to remind the Administrator system load and CPU usage.
First, install the following Linux mail client msmtp software (similar to a foxmail tool)
1. Download and install:Http://downloads.sourceforge.net/msmtp/msmtp-1.4.16.tar.bz2?modtime=1217206451big_mirror=0
Copy Code code as follows:
# tar JXVF msmtp-1.4.16.tar.bz2
# C
Computer use for a long time, it is inevitable that such a failure. In many computer failures, board card class appears the most likely. Although the CPU is an important part of the computer, but the probability of failure is relatively small, common CPU failures are roughly the following: thermal failure, restart failure, black screen fault and overclocking failure. Because the
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
Original link: http://blog.uwa4d.com/archives/optimzation_cpu.html
Performance optimization is an eternal topic in the development of game projects. Player needs and project requirements are constantly growing, with the number of people, screen effects and the complexity of the scene is always approaching the trend of "squeeze dry" hardware. Therefore, regardless of the level of hardware equipment development, no matter how rich experience in the development team, performance optimization is alw
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