OCSM System with Napatech Card Runs with Single CPU Thread - Cores/HT Not Recognized by OS (Doc ID 2163943.1)

Last updated on MARCH 23, 2017

Applies to:

Oracle Communications Session Monitor - Version 3.1.x and later
Information in this document applies to any platform.

Symptoms

Scope

This article is applicable for systems with Napatech card only as other systems may use a newer 3.2 or 3.16 kernels (for more information on versions and available kernels please see Doc ID 2081750.1 article - relevant is its first section, the explanation and not the actions noted in the KM). The reason is that an OCOM with Napatech card present needs to boot into the older 2.6 kernel that is present on any OCOM system and cannot use the 3.2/3.16.
Further, this article is applicable on the newer servers like a HP308 G9 as the older servers have better compatibility with the legacy 2.6 kernel.

 

Issue

The OCOM server needs a minimum of 8 CPU threads to run (or more - depending on the sizing of particular system). There is a know issue on some newer servers (like HP380 G9) with newer processors where the system does not recognize a multiple threads of the CPU (its cores or hyper-threading) and essentially OS has only one CPU thread available.

 

Symptoms

Since the system in such case runs with a single CPU thread (as opposed to 8+), it affects it performance severely and may lead to packet drops on the Napatech, processes restarts or general slowness of the GUI, delays on the data presence/retrieval.

Changes

 N/A

Cause

Sign In with your My Oracle Support account

Don't have a My Oracle Support account? Click to get started

My Oracle Support provides customers with access to over a
Million Knowledge Articles and hundreds of Community platforms