1 files changed, 48 insertions, 0 deletions
diff --git a/utils/parallel/grs2gr.pl b/utils/parallel/grs2gr.pl
new file mode 100644
index 0000000000..ab398a53d9
--- /dev/null
+++ b/utils/parallel/grs2gr.pl
@@ -0,0 +1,48 @@
+#!/usr/local/bin/perl
+
+#
+# Convert several .gr files (from the same GUM run) into a single
+# .gr file with all times adjusted relative to the earliest start
+# time.
+#
+
+$count = 0;
+
+foreach $i (@ARGV) {
+    open(GR, $i) || die "Can't read $i\n";
+    $cmd = <GR>;
+    $dateline = <GR>;
+    $start = <GR>;
+    ($pe, $timestamp) = ($start =~ /PE\s+(\d+) \[(\d+)\]/);
+    die "PE $pe too high\n" if $pe > $#ARGV;
+    $proc[$count++] = $pe;
+    $prog[$pe] = $cmd;
+    $time[$pe] = $timestamp;
+    close(GR);
+}
+
+$basetime = 0;
+
+for($i = 0; $i < $count; $i++) {
+    $pe = $proc[$i];
+    die "PE $pe missing?\n" if !defined($time[$pe]);
+    die "Mismatched .gr files\n" if $pe > 0 && $prog[$pe] ne $prog[$pe - 1];
+    $basetime = $time[$pe] if $basetime == 0 || $basetime > $time[$pe];
+}
+
+print $cmd;
+print $dateline;
+
+for($i = 0; $i < $count; $i++) {
+    $pe = $proc[$i];
+    $delta = $time[$pe] - $basetime;
+    open(GR, $ARGV[$i]) || die "Can't read $ARGV[i]\n";
+    $cmd = <GR>;
+    $dateline = <GR>;
+    $start = <GR>;
+    while(<GR>) {
+        /PE\s+(\d+) \[(\d+)\]/;
+	printf "PE %2u [%lu]%s", $1, $2 + $delta, $';
+    }
+    close(GR);
+}