Index: trunk/pswarp/src/pswarpArguments.c
===================================================================
--- trunk/pswarp/src/pswarpArguments.c	(revision 18558)
+++ trunk/pswarp/src/pswarpArguments.c	(revision 18839)
@@ -40,4 +40,17 @@
         psArgumentRemove(N, &argc, argv);
     }
+
+    // Number of threads
+    if ((N = psArgumentGet(argc, argv, "-threads"))) {
+        psArgumentRemove(N, &argc, argv);
+	int nThreads = atoi(argv[N]);
+        psMetadataAddS32(config->arguments, PS_LIST_TAIL, "NTHREADS", 0, "number of warp threads", nThreads);
+        psArgumentRemove(N, &argc, argv);
+
+	// create the thread pool with number of desired threads, supplying our thread launcher function
+	// XXX need to determine the number of threads from the config data
+	psThreadPoolInit (nThreads);
+    }
+    pswarpSetThreads ();
 
     // PSF determination?