Here is yet another way of doing the parsing...

#!/usr/bin/perl -w
use strict;

while (<DATA>)
{
    next unless /^@/;
    my $header = ($_ =~ m/([\w:\s]+)/)[0]; #tweak as necessary
    $header =~ s/\s*$//;
    $header =~ s/^\s*//;
    
    my @lines = get_data_4_header($header);
    print "** lines for \"$header\" **\n";
    print @lines;
    print "\n";
}

sub get_data_4_header
{
   my $header = shift; #not used here, but could be if needed..
   my @result=();

   <DATA>;  #throw away a line (i.e., the next --- line)
   while ( ($_ = <DATA>) !~ m/^-/) 
   {
      push @result,$_;
   }
   return @result;
}

=Prints:
** lines for "Callsites: 2" **
ID Lev File/Address        Line Parent_Funct          MPI_Call
 1  0 0x8048ad5               [unknown]                Reduce
 2  0 0x8048a3b               [unknown]                Bcast

** lines for "Aggregate Time" **
Call                 Site       Time    App%    MPI%     COV
Bcast                   2        9.5   24.71   65.75    0.59
Reduce                  1       4.95   12.87   34.25    1.35
=cut

__DATA__
-------------------------------------------------------------------
@--- Callsites: 2 -------------------------------------------------
------------------------------------------------------------------
ID Lev File/Address        Line Parent_Funct          MPI_Call
 1  0 0x8048ad5               [unknown]                Reduce
 2  0 0x8048a3b               [unknown]                Bcast
------------------------------------------------------------------
@--- Aggregate Time (top twenty, descending, milliseconds) ---
-----------------------------------------------------------------
Call                 Site       Time    App%    MPI%     COV
Bcast                   2        9.5   24.71   65.75    0.59
Reduce                  1       4.95   12.87   34.25    1.35
----------------------------------------------------------------
[download]

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