linux multicore cpu usage

For i in ' SEQ 1 $ (cat/proc/cpuinfo |grep "Physical id" |wc-l) '; Do DD If=/dev/zero Of=/dev/null DoneDescriptionCat/proc/cpuinfo |grep "Physical ID" | Wc-l can get the number of CPUs, which we represent as N.SEQ 1 n is used to generate numbers between 1 and NFor i in ' seq 1 N '; is the loop execution command, from 1 to nDD If=/dev/zero Of=/dev/null Executes the DD command, output to/dev/null, actually consumes only CPU, no IO operation.Due to the

Linux The kernel has been tested for a long time in terms of performance, especially 2.6/3.x kernel. However, in the case of high IO, especially the network, the processing of interrupts can become a problem. We have found this problem on a high-performance system with one or more saturated 1Gbps NICs, and recently there are many small packets concurrently (about 10000packets/second ) overload on the virtual machine also found this problem. The reaso

This afternoon, the site two times the machine, the dispatch to Aliyun, found that the reason is the server's CPU 100%. After restarting the server, use the top command to see which processes are consuming so much CPU usage. Stare at a good more than 10 minutes, the main CPU-consuming process has two, one is MySQL, th

View the System Version: lsb_release-[Root @ localhost/] # lsb_release-LSB version: core-4.0-amd64: core-4.0-noarch: graphics-4.0-amd64: graphics-4.0-noarch: printing-4.0-amd64: printing-4.0-noarch:Distributor ID: centosDescription: centos release 6.1 (final)Release: 6.1 Codename: Final View kernel version: uname- Linux localhost. localdomain 2.6.32-131.0.15.el6.x86 _ 64 #1 SMP sat Nov 12 15:11:58 CST 2011 x86_64 x86_64 x86_64 GNU/

Article reprint: http://www.php-note.com/article/detail/7935. Query port is occupiedNetstat-tlnNetstat-tln | grep Port numberLsof-i: Port numberkill-9 PID Number6. Find the. jira-home.lock file[[email protected] ~]# Find/-name '. Jira-home.lock '1. View the number of physical CPUs [[email protected] ~]# cat/proc/cpuinfo |grep "Physical id" |sort |uniq|wc-l1 2. View the number of logical CPUs [Email protected] ~]# cat/proc/cpuinfo |grep "Processor" |wc-l4 3. View

Some time ago there is a maintenance of the author of the small computer room air conditioning failure, high temperature caused the system card slow, no one found. So I want to use Zabbix to monitor the CPU temperature and set the alarm threshold value, but also can monitor the fan anomaly, the wind board too dirty air, process deadlock caused high CPU usage anom

/mnt_storage_pic.txt time= ' Date +%m '. %d ""%k ":"%m ' connect= ' Netstat-na | grep "219.238.148.30:80" | Wc-l ' Echo $time $connect >>./temp/connect_count.txt 3, monitoring the host's disk space, when the use of more than 90% in space by sending mail to send a warning The code is as follows Copy Code #!/bin/bash#monitor Available disk spaceSpace= ' DF | Sed-n '//$/P ' | Gawk ' {print $} ' | Sed ' s/%//'If [$SPACE-ge 90]ThenSend mailFi 4

In linux, virtual machines are often used. What is the impact on CPU and video card?-Linux general technology-Linux technology and application information. The following is a detailed description. Everyone can speak freely. I only install Linux, and some work must be complet

(P) A P_pid_set.add (p.pid) the returnProcess_list2 + - $ defMonitor_system (self): $ psutil.cpu_percent () -Time.sleep (1) -MEM =psutil.virtual_memory () the -Mem_total = mem.total/1000000WuyiMem_available =mem.available/1000000 themem_percent = str (mem.percent) +'%' - WuCpu_count =Psutil.cpu_count () -Cpu_percent =psutil.cpu_percent () About $msg ='The total native memory is: {0}m, native available memory is: {1}m, Native memory usage