xv6

commit 41c4bbb505f4389a5c1660b407cd4073d7a72aab
parent b0751a3e9bfce88cb07c1a540ceabf21f2d53b31
Author: Austin Clements <amdragon@mit.edu>
Date:   Wed,  1 Sep 2010 02:14:35 -0400

Make it easy to change the number of CPUs

Diffstat:
M
Makefile
 | 
5
++++-

1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/Makefile b/Makefile
@@ -179,7 +179,10 @@ GDBPORT = $(shell expr `id -u` % 5000 + 25000)
 QEMUGDB = $(shell if $(QEMU) -help | grep -q '^-gdb'; \
 	then echo "-gdb tcp::$(GDBPORT)"; \
 	else echo "-s -p $(GDBPORT)"; fi)
-QEMUOPTS = -smp 2 -hdb fs.img xv6.img
+ifndef CPUS
+CPUS := 2
+endif
+QEMUOPTS = -hdb fs.img xv6.img -smp $(CPUS)
 
 qemu: fs.img xv6.img
 	$(QEMU) -serial mon:stdio $(QEMUOPTS)