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gprof, bprof and Time Profilers

Issue 49

From Issue #49
May 1998

May 01, 1998  By Andy Vaught
 in
Mr. Vaught shows programmers a few commands to determine which sections of their code need optimization.
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progress has been made

Anonymous's picture
Submitted by Anonymous (not verified) on Mon, 01/18/2010 - 05:38.

"The easiest profiler to use under Linux is the gprof profiler"

We've come a long way since 1998. Check out Zoom - http://www.rotateright.com or even oprofile.

> The operation of

Anonymous's picture
Submitted by Anonymous (not verified) on Mon, 08/17/2009 - 18:34.

> The operation of referencing the array consists of multiplying
> i times a scaling factor (which is implemented as binary left shifts),
> adding this value to the start of array[] and fetching from that location.
> Replacing this code with:

Any CPU since the 68000 has had addressing modes like (reg1*constant + reg2) which makes the array index and pointer cases strictly identical, unless the pointer saves you a register. Is your friend coding on 8-bit cpu or something ?

Flat Profile

V Varun's picture
Submitted by V Varun (not verified) on Tue, 12/02/2008 - 06:00.

Hi,

We are using Flat profile in order to analyse our program. But the calls column for all the functions does not show any value. We are unable to figure out what is the problem. Please tell us a solution as quickly as possible. Thanks in advance.

Thanks and Regards,
V Varun.

error on running gprof

Anonymous's picture
Submitted by Anonymous (not verified) on Wed, 01/03/2007 - 05:22.

I am using gprof for profiling my code compiled using gcc in Linux.
the code runs fine and generates gmon.out
but when i give gprof it is giving error
"gprof: datalogger(which is the name of my executable):not in a.out format"

what can be the possible reason?
anybody please suggest.

Gprof

Anonymous's picture
Submitted by Anonymous (not verified) on Tue, 05/10/2005 - 12:31.

Hi,
I am trying to profile my code on Linux using Gprof
However it is showing incomplete data
Also it is showing the cumulative sec and self sec as all 0.00
I tried profileing in HP 11i there gprof is doing name mangling
Thanks
Nidhi

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