From: damon AT WRONG DOT redshift DOT com (Damon Casale)
Newsgroups: comp.os.msdos.djgpp
Subject: GPROF reports zero time spent?
Date: Wed, 07 Mar 2001 20:55:57 GMT
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

Hi, it's me again.  I'm trying to get gprof to profile my compression
program correctly, and it's driving me batty.  -_-

Here's the first few lines of (relevant) output:

Flat profile:

Each sample counts as 0.0555556 seconds.
  %   cumulative   self              self     total           
 time   seconds   seconds    calls  Ts/call  Ts/call  name    
100.00    424.17   424.17                             __dpmi_int
  0.00    424.17     0.00 220774244     0.00     0.00  longest_match
  0.00    424.17     0.00 15382759     0.00     0.00  pqdownheap
  0.00    424.17     0.00  6210841     0.00     0.00  bi_reverse
  0.00    424.17     0.00  1320192     0.00     0.00
CFAT32::GetNextFATEntry(unsigned long, unsigned long &)
  0.00    424.17     0.00  1320192     0.00     0.00
CFAT32::ReadFATSector(unsigned long, unsigned short &)
... (etc.)

I'd like to know how gprof calculates time.  (I've tried wading
through gprof's source and I haven't found the function call to get
the current time yet.)  Why would it be reporting zero time spent for
every function except __dpmi_int?

Damon Casale, damon AT WRONG DOT redshift DOT com (remove the obvious)
Brother, can you spare some time?