[root@ora10g ~]# mpstat -P ALL 2 5

4,字段含义如下

英文解释：

CPU：Processor number. The keyword all indicates that statistics are calculated as averages among all processors.

%user：Show the percentage of CPU utilization that occurred while executing at the user level (application).

%nice：Show the percentage of CPU utilization that occurred while executing at the user level with nice priority.

%sys：Show  the  percentage  of CPU utilization that occurred while executing at the system level (kernel). Note that

this does not include time spent servicing interrupts or softirqs.

%iowait：Show the percentage of time that the CPU or CPUs were idle during which the system had an outstanding disk  I/O request.

%irq：Show the percentage of time spent by the CPU or CPUs to service interrupts.

%soft：Show  the  percentage  of time spent by the CPU or CPUs to service softirqs.  A softirq (software interrupt) is

one of up to 32 enumerated software interrupts which can run on multiple CPUs at once.

%steal：Show the percentage of time spent in involuntary wait by the virtual CPU or CPUs while the hypervisor was  ser-vicing another virtual processor.

%idle：Show  the percentage of time that the CPU or CPUs were idle and the system did not have an outstanding disk I/O request.

intr/s：Show the total number of interrupts received per second by the CPU or CPUs.

参数解释 从/proc/stat获得数据

CPU 处理器 ID

user 在internal时间段里，用户态的CPU时间(%)，不包含 nice值为负 进程 (usr/total)*100

nice 在internal时间段里，nice值为负进程的CPU时间(%)   (nice/total)*100

system 在internal时间段里，核心时间(%)   (system/total)*100

iowait 在internal时间段里，硬盘IO等待时间(%) (iowait/total)*100

irq 在internal时间段里，硬中断时间(%)      (irq/total)*100

soft 在internal时间段里，软中断时间(%)    (softirq/total)*100

idle 在internal时间段里，CPU除去等待磁盘IO操作外的因为任何原因而空闲的时间闲置时间(%)(idle/total)*100

intr/s 在internal时间段里，每秒CPU接收的中断的次数intr/total)*100

CPU总的工作时间=total_cur=user+system+nice+idle+iowait+irq+softirq

total_pre=pre_user+ pre_system+ pre_nice+ pre_idle+ pre_iowait+ pre_irq+ pre_softirq

user=user_cur – user_pre

total=total_cur-total_pre

其中_cur 表示当前值，_pre表示interval时间前的值。上表中的所有值可取到两位小数点。