Live Optics: Optical Prime How is Latency Calculated
Summary: This article explains how latency is calculated for Live Optics Optical Prime.
This article applies to
This article does not apply to
This article is not tied to any specific product.
Not all product versions are identified in this article.
Instructions
The calculation of latency depends on the OS or platform, but generally they all track latency in a similar way:
Latency is measured as the average time (in milliseconds) for each I/O operation to travel through the host stack and back. This means that the latency reported by Live Optics often differs from the latency reported by the disk arrays. This discrepancy occurs because hosts often queue I/O operations before sending them to the SAN, and Optical Prime accounts for this queue time.
However, the latency reported by tools like Perfmon should be identical to that reported by an Optical Prime project, as both are measuring the same counter.
Additional Information
If you have any questions, reach out to Live Optics Support at Dell Support.
Affected Products
LiveOpticsArticle Properties
Article Number: 000296530
Article Type: How To
Last Modified: 05 Jun 2026
Version: 3
Find answers to your questions from other Dell users
Support Services
Check if your device is covered by Support Services.