trivial stat collection script

- for each job, count number of files that used collectives, independent
  operations, or posix

darshan-test/darshan-gather-mpi-posix-usage.pl

+#!/usr/bin/perl -w
+
+# This script will go through all of the darshan logs in a given
+# subdirectory and summarize a few basic statistics about data usage and
+# performance, producing a text file with text in columns
+
+#<jobid> <version> <start ascii> <end ascii> <start unix> <end unix> <nprocs> <bytes read> <bytes written> <perf estimate> 
+
+use strict;
+use File::Find;
+
+sub wanted
+{
+    my $file = $_;
+    my $line;
+    my $version = 0.0;
+    my $nprocs = 0;
+    my $start = 0;
+    my $end = 0;
+    my $start_a = "";
+    my $end_a = "";
+    my $jobid = 0;
+    my $bytes_r = 0;
+    my $bytes_w = 0;
+    my $perf = 0.0;
+    my @fields;
+    my $mpi_coll_count = 0;
+    my $mpi_indep_count = 0;
+    my $posix_count = 0;
+
+    # only operate on darshan log files
+    $file =~ /\.darshan\.gz$/ or return;    
+
+    # grab jobid from name, old logs don't store it in the file
+    if($file =~ /_id(\d+)_/) {
+        $jobid = $1;
+    }
+
+    if(!(open(SUMMARY, "darshan-parser --file-list-detailed $file |")))
+    {
+        print(STDERR "Failed to parse $File::Find::name\n");
+        return;
+    }
+
+    while ($line = <SUMMARY>) {
+        if($line =~ /^#/) {
+            next;
+        }
+        if($line =~ /^\s/) {
+            next;
+        }
+
+        @fields = split(/\s/, $line);
+
+        if($#fields == 34)
+        {
+            if($fields[12] > 0){
+                $mpi_coll_count ++;
+            }
+            elsif($fields[11] > 0){
+                $mpi_indep_count ++;
+            }
+            elsif($fields[13] > 0){
+                $posix_count ++;
+            }
+
+        }
+    }
+
+    print(STDOUT "$jobid\t$mpi_coll_count\t$mpi_indep_count\t$posix_count\n");
+    close(SUMMARY);
+}
+
+sub main
+{
+    my @paths;
+
+    if($#ARGV < 0) {
+        die("usage: darshan-gather-stats.pl <one or more log directories>\n");
+    }
+
+    @paths = @ARGV;
+
+    # print("<jobid>\t<version>\t<start ascii>\t<end ascii>\t<start unix>\t<end unix>\t<nprocs>\t<bytes read>\t<bytes written>\t<perf estimate>\n"); 
+
+    find(\&wanted, @paths);
+
+}
+
+main();
+
+# Local variables:
+#  c-indent-level: 4
+#  c-basic-offset: 4
+# End:
+#  
+# vim: ts=8 sts=4 sw=4 expandtab