lightweight function for measuring time ( better than clock

Sponsored Content

Operating Systems Linux Red Hat lightweight function for measuring time ( better than clock_getime ) Post 302539401 by manustone on Sunday 17th of July 2011 07:07:16 AM

07-17-2011

Registered User

lightweight function for measuring time ( better than clock_getime )

HI
I have a Red Hat Enterprise with Real Time kernel.

Are you aware if there are C functions for this kernel or some code/library for this OS for measuring time more lightweight than clock_gettime and gettimeofday? THe hardware I have is NUMA.

Reading forums I found gethrtime but it is available on Solaris only; this last spends few cycles compared to clock_gettime and gettimeofday eating the CPU.

Do you know if for Red Hat someomene did something similar?
My distro is the following

THanks a lot

Code:

     uname -a
     Linux lndbxdev01 2.6.24.7-108.el5rt #1 SMP PREEMPT RT 
     Mon Mar 23 10:58:10 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux

     cat/etc/redhat-release
     Red Hat Enterprise Linux Server release 5.3 (Tikanga)

manustone

View Public Profile for manustone

Find all posts by manustone

7 More Discussions You Might Find Interesting

1. Programming

Measuring System Call Time

Can anyone please help me in measuring the system call timings! How do I do it if I have to measure the timing of an operation, say getpid system call. What different functions can I use for that and what would be the difference using each of them? Thanx!

2. Programming

C time in milliseconds function.

I need a c function which return the time in: hour min sec and mil sec I am writing on unix os.

3. Shell Programming and Scripting

time function

Hi, I would like to display the exact time taken to complete running a particular tool or function or program to user I don't know the exact time functions in unix, please help me thanks in advance Example: $test.ksh output should be The...

4. Programming

function time

Hello I have problem with function 'time' to test my program for file copying . How to run the function in my source code ? I try something like that: system("time"); < -- but this don't working

5. Shell Programming and Scripting

Nawk Time Function

Hi All, I am using solaris and nawk. Is there any time function in nawk which is simliar to the shell `date` function ? Can any experts show any examples?

6. UNIX for Dummies Questions & Answers

time function

hello everybody! i want to post a question. So, I use the command 'time a.out' to time the duration of the program a.out. The return value of this function was: real 0m4.116s user 0m4.112s sys 0m0.016s What i want is! I try to find a way to get (NOT manually) the value of real time....

7. Ubuntu

Measuring the correctness of ndelay() function.

I wrote this kernel module to test the correctness of ndelay() function. Kernel mdoule: #include <linux/module.h> #include <linux/init.h> #include <linux/kernel.h> #include <linux/time.h> #include <linux/delay.h> static int __init initialize(void) { ktime_t start, end; s64...

LEARN ABOUT CENTOS

ksc

KSC(1)								   User Commands							    KSC(1)

NAME

       ksc - Linux kernel module source checker

SYNOPSIS

       ksc [ -d | --directory ] DIRECTORY

       ksc [ -k | --ko ] FILE

OPTIONS

       KSC   accepts  command-line  arguments,	and  has  both	a  long and short form usage.  You can use either style or combine them to specify
       options. When the tool is run with kernel module sources it checks for all four architectures, and when run with binary kernel modules,	it
       checks for the specific architecture for which the binary was built.
       Valid RHEL whitelist releases are rhel6.0, rhel6.1, rhel6.2, rhel6.3, rhel6.4

       -h, --help
	      show this help message and exit

       -c CONFIG, --config=CONFIG
	      path  to	the  local  ksc.conf file. If not specified the tool tries to read from ~/ksc.conf and if that is also not found then from
	      /etc/ksc.conf

       -d DIRECTORY, --directory=DIRECTORY
	      path to the directory

       -i, --internal
	      to create text files to be used internally.

       -k KO, --ko=KO
	      path to the ko file.  You should either  use -d or -k to run the KSC tool, but not both.	If both -d and -k option is  used  at  the
	      same time then only -d is used and the -k option is discarded.

       -n RELEASENAME, --name=RELEASENAME
	      Red Hat release against which the bug is to be filed. Default value is 6.5

       -p PREVIOUS, --previous=PREVIOUS
	      path to the previous resultset file and submit it as a bug to Red Hat Bugzilla.

       -r RELEASE, --release=RELEASE
	      RHEL whitelist release used for comparison

       -s, --submit
	      Submits the report to the Red Hat bugzilla (https://bugzilla.redhat.com).  The credentials need to be in the /etc/ksc.conf file. The
	      tool will prompt for bugzilla password.

	      The configuration file looks like below:

	      [bugzilla]
	      user=user@redhat.com
	      partner=partner-name
	      partnergroup=partner-group
	      server=https://bugzilla.redhat.com/xmlrpc.cgi

       -v, --version
	      Prints KSC version number

ksc - Version 0.9.11						     Feb 2014								    KSC(1)

7 More Discussions You Might Find Interesting

1. Programming

Measuring System Call Time

Discussion started by: chacha

2. Programming

C time in milliseconds function.

Discussion started by: kamil

3. Shell Programming and Scripting

time function

Discussion started by: hsekol

4. Programming

function time

Discussion started by: scotty_123

5. Shell Programming and Scripting

Nawk Time Function

Discussion started by: Raynon

6. UNIX for Dummies Questions & Answers

time function

Discussion started by: nicos

7. Ubuntu

Measuring the correctness of ndelay() function.

Discussion started by: BHASKAR JUPUDI

LEARN ABOUT CENTOS

ksc