CPU load in video decoding using SAR Post: 302849961

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Top Forums UNIX for Dummies Questions & Answers CPU load in video decoding using SAR Post 302849961 by John_giova on Tuesday 3rd of September 2013 04:30:01 PM

09-03-2013

Registered User

CPU load in video decoding using SAR

Hi, I'm John_giova and I'm new in this Forum. Sorry my english, it's not my first language.

So, I'm trying to check the CPU utlization during the video encoding and decoding (making a comparison between SW and HW ) using the SAR tool. According to a past thread I saw as CPU utilization I should have to consider %user+%nice+%system.
The questions are 2:
The first, more important, is: is the video co-decoding a user activity, and I need to consider just %user+%nice as CPU load or I have to consider also %system?
Second: why when I do the SW encoding almost the total load is on %nice column(few in user) and when I do HW encoding and both SW and HW decoding the main utilization CPU is in the %user column and the %nice column is totally zero??

I hope I have been clear enough, I'm not really pacticed with this.

John_giova

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LEARN ABOUT FREEBSD

libngatm

LIBNGATM(3)						   BSD Library Functions Manual 					       LIBNGATM(3)

NAME

     libngatm -- ATM signalling library

LIBRARY

     Begemot ATM signalling library (libngatm, -lngatm)

DESCRIPTION

     The Begemot UNI signalling library handles message decoding and encoding as well as the Q.2110 and Q.2120 transport protocols and adaptation
     layers, and ATM-Forum UNI 4.0 compliant signalling.  Because of this complexity the description is broken down in several man pages:

     unimsg(3)
	   Describes a data structure and functions for handling of variable sized messages.

     unistruct(3)
	   describes data structures for the decoding, encoding and printing functions in the library.

     unifunc(3)
	   describes the decoding, encoding and printing functions.

     uniaddr(3)
	   describes address structures and handling functions.

     unisap(3)

SEE ALSO

     sscop(1)

STANDARDS

     This implementation conforms to the applicable ITU-T recommendations and ATM Forum standards.

AUTHORS

     Hartmut Brandt <harti@FreeBSD.org>

BSD
								   May 23, 2005 							       BSD

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