CPU utilization refers to the amount of CPU that is utilized to execute tasks assigned by the OS, the tasks are assigned via APPLICATION PROGRAM and SYSTEM PROGRAM, which are hosted by the OS.
CPU utilization is a metric that provides the usage data of CPU resources, CPU utilization is directly proportional to the computational tasks, the higher the computational task, the higher the CPU utilization will be.
CPU time and CPU utilization are deeply linked and are observed simultaneously. The higher the computation tasks, the higher the CPU utilization will be. Both CPU TIME and CPU utilization go hand in hand as some computational tasks will require more CPU TIME than others, all this comes under the purview of CPU UTILIZATION.
By measuring the CPU UTILIZATION the CPU performance can be measured and forecasted so that capacity estimation can be carried out in real-time and provisional manner.
CPU UTILIZATION is directly proportional to the CPU LOAD, the higher higher CPU utilization means the CPU is heavy lifting.
AROUND 50 PERCENT CPU UTILIZATION IS OPTIMUM, BUT MORE THEN 50 PERCENT CAN RESULT IN COMPUTING / PROCESSING BOTTLE-NECK and can reduce the processing efficiency by increasing both the space complexity and time complexity in the computational system.
If the CPU utilization reaches 100 percent, then the system will crash as it is overworked. The CPU utilization information will be provided by the resource manager of the OS.
Resource manager WILL SHARE THE percentage OF CPU RESOURCES THAT are being CONSUMED BY THE Running SERVICES along with this it will also share the power consumption, and meta-data via GUI / CLI interface to carry out both software level and hardware level diagnostics.
CPU utilization will contain the no of processes running, process types, CPU time, no of handles, no of threads, clock frequency, no of cores, and much more vital information that is utilized by the software and the hardware team for maintaining, troubleshooting, and maintenance tasks.
CPU utilization is linked with CPU scheduling, as the CPU -> task scheduling needs to be carried out by the OS to deliver optimized processing and storing capabilities.
Here are a few factors that are linked to CPU UTILIZATION :
Throughput -> will define the process execution in a certain amount of time.
TAT – > For a process a TAT is assigned this helps in CPU SCHEDULING and process optimization.
TAT = Completion time – Arrival Time.
Waiting time – the waiting time is the time spent waiting for a process to get access to CPU TIME, it can be defined as the difference between the TAT and BURST TIME.
Waiting time = TAT – Burst time
Completion time – the amount of time taken to complete the process is referred to as completion time.
Predictability – It is a probability factor that renders a prediction of how long a process will run, keeping the load data highly predictable.
Priority – Priority scores are assigned and based on the CPU TIME given to each process, the system process has higher priority as the CPU, GPU, and storage will not work and the system will crash without system processes.
Response time –Application programs and system programs are complex programs and the output can be generated sequentially and incrementally so that the response time is the first output response generated during the CPU TIME allotted to the process.
It can be defined by the following formula:
Response time = CPU TIME – Arrival Time
Major CPU SCHEDULING algorithms are:
1) Priority Scheduling
2) Round Robin
3) Shortest job first
4) Longest job first
5) Longest remaining time first
6) SHORTEST REMAINING TIME FIRST
7) First come first served
Thus the CPU utilization as mentioned above is the percentage of the CPU RESOURCES utilized for processing applications and system programs.
Here are the following KPIs in CPU UTILIZATION:
Utilization percentage | Percentage
Speed of clock | GHZ
No of processes | INT value
Threads | INT value
Handle | INT value
CPU UPTIME | Time Data
Max Speed | GHZ
Sockets | INT Value
Cores | INT value
Logical Processors | INT value
Virtualization | Boolean
The caching system data will have integer values in KBs, and MBs, these are internal caches which are L1 | L2 | L3
CPU utilization is a very important parameter to gauge CPU performance and carry out maintenance and diagnostic activities.
Diagrams
The article above is rendered by integrating outputs of 1 HUMAN AGENT & 3 AI AGENTS, an amalgamation of HGI and AI to serve technology education globally.