LinuxQuestions.org
Visit Jeremy's Blog.
Go Back   LinuxQuestions.org > Forums > Linux Forums > Linux - Newbie
User Name
Password
Linux - Newbie This Linux forum is for members that are new to Linux.
Just starting out and have a question? If it is not in the man pages or the how-to's this is the place!

Notices


Reply
  Search this Thread
Old 07-14-2015, 11:23 PM   #1
MahendraL
LQ Newbie
 
Registered: Jul 2009
Posts: 29

Rep: Reputation: 0
Query about a strange 'perf top' output


Hi,
I'm running a C++ program (HPCG benchmark) on an ARM processor based board (Juno) with 64-bit Fedora 21 OS.
When I run perf top in another terminal to find which functions are taking more CPU time, I get an output like below.

75.84 xhpcg [.] ComputeSYMGS_ref
22.27% xhpcg [.] ComputeSPMV_ref
1.14% xhpcg [.] ComputeWAXPBY_ref
0.40% xhpcg [.] ComputeDotProduct_ref
0.12% xhpcg [.] ComputeRestriction_ref
0.11% xhpcg [.] ComputeProlongation_ref
0.08% xhpcg [.] ComputeDotProduct_ref

The function ComputeDotProduct_ref is printed twice, once on line 4 and again on line 7 (last line).
I thoroughly checked source code and found that there is no function overloading for this function and it's defined only once.
Then why "perf top" is showing the same function twice ?

Thank you.
MahendraL

Last edited by MahendraL; 07-14-2015 at 11:24 PM.
 
  


Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off



Similar Threads
Thread Thread Starter Forum Replies Last Post
what does the columns of perf report (command of perf tool in linux) signifies? viv05 Linux - Software 2 06-01-2012 06:25 AM
Query regarding top & virtual memory vasco.debian Linux - Server 1 05-05-2010 04:53 PM
Strange Query pinga123 Linux - Newbie 5 10-27-2009 04:32 AM
strange AAAA lookup query xnetua Linux - Networking 4 09-06-2009 09:11 AM
mysql use output of one query in another query secretlydead Programming 2 11-19-2007 01:25 AM

LinuxQuestions.org > Forums > Linux Forums > Linux - Newbie

All times are GMT -5. The time now is 03:16 AM.

Main Menu
Advertisement
My LQ
Write for LQ
LinuxQuestions.org is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
Syndicate
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Open Source Consulting | Domain Registration