Quick Answer
The ids/ips per-packet processing latency calculator computes per-packet processing latency from the input values you provide.
Calculator
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Find Engineering Solutions →Result Interpretation
IDS/IPS Per-Packet Processing Latency Calculator computes Per-Packet Processing Latency in s using the defined engineering formula and the input values provided. Per-Packet Processing Latency is expressed in s. No universal acceptance threshold is defined by this calculator.
Worked Example
Verified calculation
Given:
- Average Rule Complexity (cycles per rule) = 1000
- Signature Matching Cycles per Packet = 750
- Fixed Inspection Overhead Cycles = 280
- CPU Clock Frequency = 2800000000
- Hardware Offload Fraction = 0.3
Expected Result:
- Per-Packet Processing Latency = 5.1071428571429E-7
Engineering Interpretation:
Under the given input conditions, the calculated result is: Per-Packet Processing Latency = 5.1071428571429E-7 s.
The actual numerical result is computed by the Runtime engine using the persisted tool definition. The values shown here come from automatically validated test cases.
Formula / Method
per-packet processing latency = (cycles per rule * signature matching cycles per packet + fixed inspection overhead cycles) / cpu clock frequency * (1.0 - hardware offload fraction)Per-Packet Processing Latency.
Variables
| Symbol | Label | Role | Description |
|---|---|---|---|
| rule_complexity | Average Rule Complexity (cycles per rule) | INPUT | Average Rule Complexity (cycles per rule) |
| signature_match_cycles | Signature Matching Cycles per Packet | INPUT | Signature Matching Cycles per Packet |
| packet_inspection_overhead | Fixed Inspection Overhead Cycles | INPUT | Fixed Inspection Overhead Cycles |
| cpu_clock_frequency_hz | CPU Clock Frequency | INPUT | CPU Clock Frequency |
| hardware_offload_fraction | Hardware Offload Fraction | INPUT | Hardware Offload Fraction |
| packet_processing_latency | Per-Packet Processing Latency | OUTPUT | Per-Packet Processing Latency |
Calculation Steps
- Enter the average rule complexity (cycles per rule) in cycle.
- Enter the signature matching cycles per packet in cycle.
- Enter the fixed inspection overhead cycles in cycle.
- Enter the cpu clock frequency in Hz.
- Enter the hardware offload fraction in 1.
- Step 1: Compute per-packet processing latency.
- Read the per-packet processing latency (s) from the results.
Frequently Asked Questions
What does this calculator calculate?
The IDS/IPS Per-Packet Processing Latency Calculator estimates Per-Packet Processing Latency based on the input parameters you provide
Why is average rule complexity (cycles per rule) important in this calculation?
average rule complexity (cycles per rule) is directly proportional to per-packet processing latency. When you enter average rule complexity (cycles per rule) in cycle, the calculator uses it in the engineering formula to compute the output
How should I interpret the result per-packet processing latency?
The calculator outputs per-packet processing latency in s. The result is computed directly from the input values using the defined engineering formula
What units should I use for the inputs?
Enter each value in the units shown next to the input field: Average Rule Complexity (cycles per rule) (cycle), Signature Matching Cycles per Packet (cycle), Fixed Inspection Overhead Cycles (cycle), CPU Clock Frequency (Hz). Make sure all inputs use the specified units for consistent results
What assumptions does this calculator use?
This calculator uses automatically validated engineering formulas. Results are approximate and should be validated against site-specific conditions, applicable codes, and professional engineering judgment
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