Not long ago, under the friend's egged, I also DIY computer. Although the spirit of "practical, adequate." "Principle, but a few sets of plans to save machine in my mind around, make me indecisive. Hey! What about it--take money to the computer city for a spin.Saturday, I went to the computer city two laps, finally set a "package": CPU with CELERON433, Pan English motherboard (3VBA), Phillip Display (105G), 8.4G hard disk, xiaoying pa tnt16m graphics
The method of adjusting affinity
This section describes how to improve process-to-CPU affinity, CPU and memory affinity, and the affinity of virtual CPUs to physical CPUs.
1. Binding process
For dedicated CPU mode, the binding process can be applied to the specified CPU.
2. Adjust
Yesterday, with Ros, Iperf, Nettest tested the bandwidth and CPU occupancy of the CMM02NODE06-->CMM02NODE01, sending a packet length of 2KB, the test results are:Bandwidth send-side CPU utilization at the receiving end CPU usageROS 4.42gb/s, 80% 100%Iperf 4.66gb/s, 100% 70%Nettest 4.38gb/s, 100% 71%found that both Iperf and nettest are send-side
Article Title: CPU for Linux performance monitoring. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source.
As we discussed earlier, the performance of any system is baseline-based, and the performance of CPU monitoring is the above three points. The running queue,
Sar-u 1 2Iostat-c 1 2Vmstat 1 2TopUptimeLinux monitors CPU overall performance commonly used tools are:# Mpstat:mpstat not only can view the average information of all CPUs, but also can view the information of the specified CPU.# Vmstat: Can only view the average information of all CPUs; View CPU queue information;# Iostat: Can only view average information for
A common programming problem:
Which one is faster than traversing arrays and linked lists of the same size?According to the algorithm analysis method in university textbooks, you will conclude that these two are as fast as they are because the time complexity is O (n ). However, in practice, the two are very different. The following analysis shows that arrays are much faster than linked lists.
First, we will introduce a concept: Memory Hierarchy (storage hierarchy). There are various types of
In the Linux system, the software and hardware information of proc file system display system is provided.If you want to know the provider of the CPU and related configuration information in the system, you can get it through the /proc/cpuinfo file.Unlike the/proc/cpuinfo files generated by CPUs based on different instruction sets (ISA), the/proc/cpuinfo file based on the X86 instruction set (most of which is the instruction set) contains the followin
When a Linux system is occupied by one process, it cannot handle requests from other processes. The remaining requests waiting to be processed must wait until the CPU is idle. This time, the system will become very slow. The following commands will help you to identify CPU utilization to resolve CPU-related issues.Identifying
water-cooled Radiator I believe that many friends will not be unfamiliar with the universal water-cooled radiator, water-cooled radiator The biggest bright spot is that, compared with the traditional air-cooled radiator, with a stronger cooling capacity, effectively solve the problem of computer cooling in the summer. Now water-cooled cooling prices are increasingly cheap, but also more popular, water-cooled is no longer the exclusive high-end computer, a lot of attention to computer cooling cap
Boring time to see a CPU and GPU feel like, CPU and GPU a letter difference, but in the physical up a lot of difference. I believe we all know that the CPU is our computer's CPU, then we should also know that the GPU is a graphics processor. So what is the difference between them, the following small series for everyon
Http://blog.leanote.com/post/github-yihengliucc/linux-cpu%E5%8D%A0%E7%94%A8%E7%8E%87%E5%88%86%E6%9E%90
Use the top command to see that there may be a very high rate of process occupancy, which is the cumulative amount of CPU accumulated by each thread in the process.
The understanding of the third line of CPU (s) is:%us user space consumes a percentage of the
DreamHost as a shared host, usually has some restrictions on the user's CPU utilization, if some users of the site use too much CPU resources and affect the performance of the server, then this user account may be disabled, so Users using the DreamHost host need to know how much CPU resources they are using to prevent the host from being blocked.
How much
/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
1. clock speed
The clock speed is also called the clock frequency. The unit is MHz, which indicates the computing speed of the CPU. CPU clock speed = frequency X frequency doubling coefficient. Many people think that the clock speed determines the CPU running speed. This is not only one-sided, but also a misunderstanding of the server. So far, there is no definit
Tag: Service return activity produces STR output file system report htmObjectiveWhat is performance optimization? Personally, performance optimization is intended to improve application or system capabilities. So how can you achieve tuning your application performance? A lot of content is designed here, including the Linux kernel, CPU architecture, and the allocation and management of resources to the Linux kernel, understanding the process creation p
The following content comes from the reprint and its own initial experience.
Vmstat
[Root@master ~]# vmstat-n 3procs-----------Memory-------------Swap-------io------system-- -----CPU------R b swpd free buff cache si so bi bo in CS US sy ID WA St0 0 115516 6043024 430340 8691840 0 0 2 22 1-1 1 0 99 0 00 0 115516 6043024 430340 8691840 0 0 0 0 1124-751 0 0 100 0 00 0 115516 6043148 430344 8691840 0 0 0 25 1070-762 0 0 100 0 0
PROC
If the sequence runni
Article Title: View CPU information in Linux. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source.
The top command is a common performance analysis tool in Linux. It can display the resource usage of various processes in the system in real time, similar to the Windows Task Manager. The following describes how to use it.
When using a system, we must look at the system configuration, while the CentOS system looks at the configuration, it is not as intuitive as windows. You can only view them one by one. Many people are overwhelmed by how to view the CPU of the CentOS system. Next, let's learn how to view the CPU in the CentOS system. I. CentOS cpu [root @ srv/] # more/proc/cpuinfo
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