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What is CPU WA in top?

What is CPU WA in top?

id – Time spent in idle operations. wa – Time spent on waiting on IO peripherals (eg. disk) hi – Time spent handling hardware interrupt routines. (

What is Ni in Linux top?

ni – user nice cpu time (or) % CPU time spent on low priority processes. id – idle cpu time (or) % CPU time spent idle.

What is us in top command?

us: user cpu time (or) % CPU time spent in user space sy: system cpu time (or) % CPU time spent in kernel space ni: user nice cpu time (or) % CPU time spent on low priority processes id: idle cpu time (or) % CPU time spent idle wa: io wait cpu time (or) % CPU time spent in wait (on disk) hi: hardware irq (or) % CPU …

What is WA in Linux top?

Follow RSS feed Like. CPU consumption in Unix/Linux operating systems are studied using 8 different metrics: User CPU time, System CPU time, nice CPU time, Idle CPU time, Waiting CPU time, Hardware Interrupt CPU time, Software Interrupt CPU time, Stolen CPU time.

What is PR and Ni in top command?

NI (Nice Value): Also depicts the priority of the task. The difference between PR and NI is that PR is the real priority of a process as seen by the kernel, while NI is just a priority hint for the kernel. A negative nice value means higher priority, whereas a positive nice value means lower priority.

What does ni mean in top?

What is PR in top command Linux?

PR is the process’s actual priority, as viewed by the Linux kernel. For normal processes, the kernel priority is simply +20 from the nice value. Thus a process with the neutral nice value of zero has a kernel priority of 20.

What is load average in top command?

The load average is the average system load on a Linux server for a defined period of time. Typically, the top or the uptime command will provide the load average of your server with output that looks like: These numbers are the averages of the system load over a period of one, five, and 15 minutes.

How do I see CPU usage?

How to check CPU usage

  1. Right-click the Taskbar and click on Task Manager.
  2. Open Start, do a search for Task Manager and click the result.
  3. Use the Ctrl + Shift + Esc keyboard shortcut.
  4. Use the Ctrl + Alt + Del keyboard shortcut and click on Task Manager.

Which nice value has the best scheduling?

PR — Priority The scheduling priority of the task. If you see ‘rt’ in this field, it means the task is running under ‘real time’ scheduling priority. NI is nice value of task.

What is Softirq?

A very important softirq is the timer softirq ( include/linux/timer. h ): you can register to have it call functions for you in a given length of time. Softirqs are often a pain to deal with, since the same softirq will run simultaneously on more than one CPU. For this reason, tasklets ( include/linux/interrupt.

How do you run a nice command?

nice command in Linux helps in execution of a program/process with modified scheduling priority. It launches a process with a user-defined scheduling priority. In this, if we give a process a higher priority, then Kernel will allocate more CPU time to that process.

How to run the top command in Linux?

1 run top command 2 press 1, this will display per CPU usage 3 Type W and press Enter to save configuration to file 4 Next time running top will display per CPU usage. 5 This way we can configure top to our custom requirement

What do the PID and ni stand for in Linux?

PID: the process id, a unique identifier for addressing the processes USER: the user running the process PR: the task’s priority NI: a nicer representation of the priority

What is the third line of the Linux top command?

The third line displays the following central processing unit (CPU) values: us: Amount of time the CPU spends executing processes for people in “user space.” sy: Amount of time spent running system “kernel space” processes. ni: Amount of time spent executing processes with a manually set nice value. id: Amount of CPU idle time.

What do you mean by top in Linux?

The display is best described as functional, rather than intuitive, and abbreviations abound. When you first encounter top, it feels cramped, cryptic, and off-putting. With a few keypresses, though, you can tune the contents and format of the display according to what’s important to you.