modificacoes

Makefile

@@ -180,6 +180,7 @@ UPROGS=\
 	_stressfs\
 	_usertests\
 	_wc\
+	_sanity\
 	_zombie\
 
 fs.img: mkfs README $(UPROGS)
@@ -249,7 +250,7 @@ qemu-nox-gdb: fs.img xv6.img .gdbinit
 
 EXTRA=\
 	mkfs.c ulib.c user.h cat.c echo.c forktest.c grep.c kill.c\
-	ln.c ls.c mkdir.c rm.c stressfs.c usertests.c wc.c zombie.c\
+	ln.c ls.c mkdir.c rm.c stressfs.c usertests.c wc.c sanity.c zombie.c\
 	printf.c umalloc.c\
 	README dot-bochsrc *.pl toc.* runoff runoff1 runoff.list\
 	.gdbinit.tmpl gdbutil\

defs.h

@@ -120,6 +120,22 @@ void            userinit(void);
 int             wait(void);
 void            wakeup(void*);
 void            yield(void);
+void            clock(void);
+int             wait2(int* retime, int* rutime, int* stime);
+int             set_prio(int);           
+
+
+//mudanças aqui
+void            clock(void);
+int             wait2(int* retime, int* rutime, int* stime);
+int             set_prio(int);  
+int 			user_yield();
+void 			update_counters(void);         
+
+void            clock(void);
+int             wait2(int* retime, int* rutime, int* stime);
+int             set_prio(int);           
+
 
 // swtch.S
 void            swtch(struct context**, struct context*);

param.h

@@ -10,5 +10,8 @@
 #define MAXOPBLOCKS  10  // max # of blocks any FS op writes
 #define LOGSIZE      (MAXOPBLOCKS*3)  // max data blocks in on-disk log
 #define NBUF         (MAXOPBLOCKS*3)  // size of disk block cache
-#define FSSIZE       1000  // size of file system in blocks
-
+#define FSSIZE     1000  // size of file system in blocks
+#define INTERV        5  // time slice in clock cycles
+#define P1TO2       200  // time waiting before promotion from priority 1 to 2
+#define P2TO3       100  // time waiting before promotion from priority 2 to 3
+#define P3TO4        50  // time waiting before promotion from priority 3 to 4