CPU Busy Time Calculator
Definitions
- CPU Busy Time (B): The amount of time the CPU is actively processing tasks.
- Total Time (T): The total time period being considered.
- Idle Time (I): The amount of time the CPU is idle.
Example
Let's say the total time (T) is 100 seconds and the idle time (I) is 30 seconds. Using the formula:
\[
B = 100 - 30
\]
We get:
\[
B = 70 \text{ seconds}
\]
So, the CPU busy time is 70 seconds.
Extended information about "CPU-Busy-Time-Calculator"
How is CPU Time Calculated
Formula: \( \text{CPU Time} = \text{CPU Clock Cycles} \times \text{Clock Cycle Time} \)
- CPU Time: Total time the CPU spends processing instructions
- CPU Clock Cycles: Number of cycles the CPU completes
- Clock Cycle Time: Duration of each clock cycle
Example: \( \text{CPU Time} = 10^6 \times 10^{-9} \)
Formula for CPU Time
Formula: \( \text{CPU Time} = \frac{\text{Instruction Count} \times \text{CPI}}{\text{Clock Rate}} \)
- Instruction Count: Total number of instructions executed
- CPI: Cycles per instruction
- Clock Rate: Speed of the CPU in cycles per second
Example: \( \text{CPU Time} = \frac{10^6 \times 2}{2 \times 10^9} \)
CPU Execution Time Formula
Formula: \( \text{Execution Time} = \text{CPU Time} \times \text{Number of Processors} \)
- Execution Time: Total time taken to execute a program
- CPU Time: Time the CPU spends processing instructions
- Number of Processors: Total number of processors used
Example: \( \text{Execution Time} = 0.5 \times 4 \)
User CPU Time and System CPU Time
Formula: \( \text{Total CPU Time} = \text{User CPU Time} + \text{System CPU Time} \)
- User CPU Time: Time spent executing user instructions
- System CPU Time: Time spent executing system instructions
Example: \( \text{Total CPU Time} = 0.3 + 0.2 \)
CPU Hours to Hours
Formula: \( \text{Hours} = \text{CPU Hours} \times \text{Number of CPUs} \)
- Hours: Total hours of CPU usage
- CPU Hours: Hours of CPU usage per CPU
- Number of CPUs: Total number of CPUs used
Example: \( \text{Hours} = 5 \times 2 \)
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