Add postprocessing hist tool

garlic/postprocess/hist/default.nix

@@ -0,0 +1,25 @@
+{
+  stdenv
+, ministat
+}:
+
+stdenv.mkDerivation {
+  name = "hist";
+  preferLocalBuild = true;
+  src = ./.;
+
+  dontBuild = true;
+  dontConfigure = true;
+
+  inherit ministat;
+
+  patchPhase = ''
+    substituteAllInPlace hist.sh 
+  '';
+
+  installPhase = ''
+    mkdir -p $out/bin
+    cp hist.sh $out/bin/hist
+    chmod +x $out/bin/hist
+  '';
+}

garlic/postprocess/hist/hist.sh

@@ -0,0 +1,36 @@
+#!/bin/sh
+
+# Use it either reading from stdin or by specifing
+# multiple files as arguments
+
+# xeon07$ hist stdout.log
+# x <stdin>
+# +------------------------------------------------------------------------+
+# |         x                                                              |
+# |         x                                                              |
+# |         x                                                              |
+# |         x                                                              |
+# |         x                                                              |
+# |        xxx                                                             |
+# |        xxx                                                             |
+# |       xxxxx                                                            |
+# |       xxxxxx                                                           |
+# |       xxxxxxx                                                         x|
+# ||________M_A___________|                                                |
+# +------------------------------------------------------------------------+
+#     N           Min           Max        Median           Avg        Stddev
+# x  30      3.585183      3.763913      3.591559     3.5973344   0.031719975
+
+ministat=@ministat@/bin
+
+export PATH="$PATH:$ministat"
+
+files="$@"
+if [ -z "$files" ]; then
+	files=/proc/self/fd/0
+fi
+
+for file in "$files"; do
+        awk '/^time /{print $2}' $file | \
+        	ministat -w72
+done

overlay.nix

@@ -197,6 +197,9 @@ let
         mpi = self.bsc.mpi;
       };
 
+      # Post processing tools
+      hist = callPackage ./garlic/postprocess/hist { };
+
       exp = {
         noise = callPackage ./garlic/exp/noise.nix { };
         nbody = {