diff --git a/sys/src/9/pc/mkfile b/sys/src/9/pc/mkfile
index ee05c3a29..6b43feddc 100644
--- a/sys/src/9/pc/mkfile
+++ b/sys/src/9/pc/mkfile
@@ -67,6 +67,7 @@ LIB=\
 	/$objtype/lib/libmp.a\
 	/$objtype/lib/libfis.a\
 	/$objtype/lib/libaml.a\
+	/$objtype/lib/libdtracy.a\
 
 ETHER=`{echo devether.c ether*.c | sed 's/\.c/.'$O'/g'}
 AUDIO=`{echo devaudio.c audio*.c | sed 's/\.c/.'$O'/g'}
diff --git a/sys/src/9/pc/pc b/sys/src/9/pc/pc
index ffdb41a4a..86c5c8b1e 100644
--- a/sys/src/9/pc/pc
+++ b/sys/src/9/pc/pc
@@ -18,6 +18,7 @@ dev
 	cap
 	kprof
 	fs
+	dtracy
 
 	ether		netif
 	bridge		netif log
@@ -137,6 +138,9 @@ misc
 	vgatvp3026	=cur
 	vgavesa
 	vgavmware	+cur
+	
+	dtracysys
+	dtracytimer
 
 ip
 	tcp
diff --git a/sys/src/9/pc64/mkfile b/sys/src/9/pc64/mkfile
index 51204dcee..fc0b5af09 100644
--- a/sys/src/9/pc64/mkfile
+++ b/sys/src/9/pc64/mkfile
@@ -65,6 +65,7 @@ LIB=\
 	/$objtype/lib/libc.a\
 	/$objtype/lib/libfis.a\
 	/$objtype/lib/libaml.a\
+	/$objtype/lib/libdtracy.a\
 
 ETHER=`{cd ../pc; echo devether.c ether*.c | sed 's/\.c/.'$O'/g'}
 AUDIO=`{cd ../pc; echo devaudio.c audio*.c | sed 's/\.c/.'$O'/g'}
diff --git a/sys/src/9/pc64/pc64 b/sys/src/9/pc64/pc64
index ca464f96b..e3ce365d9 100644
--- a/sys/src/9/pc64/pc64
+++ b/sys/src/9/pc64/pc64
@@ -41,6 +41,7 @@ dev
 	
 	segment
 	vmx
+	dtracy
 
 link
 #	devpccard
@@ -136,6 +137,9 @@ misc
 	vgavesa
 #	vgavmware	+cur
 
+	dtracysys
+	dtracytimer
+
 ip
 	tcp
 	udp
diff --git a/sys/src/9/port/devdtracy.c b/sys/src/9/port/devdtracy.c
index 82d2d0a27..53da2c46b 100644
--- a/sys/src/9/port/devdtracy.c
+++ b/sys/src/9/port/devdtracy.c
@@ -125,9 +125,13 @@ dtkfree(DTKChan *p)
 	dtktab[idx] = nil;
 }
 
+static int dtracyen;
+
 static void
 dtracyinit(void)
 {
+	dtracyen = getconf("*dtracy") != nil;
+	if(!dtracyen) return;
 	machlocks = smalloc(sizeof(Lock) * conf.nmach);
 	dtinit(conf.nmach);
 }
@@ -135,6 +139,8 @@ dtracyinit(void)
 static Chan*
 dtracyattach(char *spec)
 {
+	if(!dtracyen)
+		error("*dtracy= not set");
 	return devattach(L'Δ', spec);
 }
 
@@ -519,60 +525,3 @@ dtpeek(uvlong addr, void *buf, int len)
 	memmove(buf, (void *) addr, len);
 	return 0;
 }
-
-static DTProbe *timerprobe;
-
-static void
-dtracytimer(void *)
-{
-	DTTrigInfo info;
-
-	memset(&info, 0, sizeof(info));
-	for(;;){
-		tsleep(&up->sleep, return0, nil, 1000);
-		dtptrigger(timerprobe, m->machno, &info);
-	}
-}
-
-static void
-timerprovide(DTProvider *prov, DTName)
-{
-	static int provided;
-	
-	if(provided) return;
-	provided = 1;
-	timerprobe = dtpnew((DTName){"timer", "", "1s"}, prov, nil);
-}
-
-static int
-timerenable(DTProbe *)
-{
-	static int gotkproc;
-	
-	if(!gotkproc){
-		kproc("dtracytimer", dtracytimer, nil);
-		gotkproc=1;
-	}
-	return 0;
-}
-
-static void
-timerdisable(DTProbe *)
-{
-}
-
-DTProvider dtracyprov_timer = {
-	.name = "timer",
-	.provide = timerprovide,
-	.enable = timerenable,
-	.disable = timerdisable,
-};
-
-extern DTProvider dtracyprov_sys;
-
-DTProvider *dtproviders[] = {
-	&dtracyprov_timer,
-	&dtracyprov_sys,
-	nil,
-};
-
diff --git a/sys/src/9/port/dtracysys.c b/sys/src/9/port/dtracysys.c
index c9e0f4e5a..859dd9f84 100644
--- a/sys/src/9/port/dtracysys.c
+++ b/sys/src/9/port/dtracysys.c
@@ -260,7 +260,7 @@ sysdisable(DTProbe *p)
 		z = systab[i], systab[i] = wraptab[i], wraptab[i] = z;
 }
 
-DTProvider dtracyprov_sys = {
+DTProvider dtracysysprov = {
 	.name = "sys",
 	.provide = sysprovide,
 	.enable = sysenable,
diff --git a/sys/src/9/port/dtracytimer.c b/sys/src/9/port/dtracytimer.c
new file mode 100644
index 000000000..cb3b636f6
--- /dev/null
+++ b/sys/src/9/port/dtracytimer.c
@@ -0,0 +1,56 @@
+#include	"u.h"
+#include	"../port/lib.h"
+#include	"mem.h"
+#include	"dat.h"
+#include	"fns.h"
+#include	"../port/error.h"
+
+#include	<dtracy.h>
+
+static DTProbe *timerprobe;
+
+static void
+dtracytimer(void *)
+{
+	DTTrigInfo info;
+
+	memset(&info, 0, sizeof(info));
+	for(;;){
+		tsleep(&up->sleep, return0, nil, 1000);
+		dtptrigger(timerprobe, m->machno, &info);
+	}
+}
+
+static void
+timerprovide(DTProvider *prov, DTName)
+{
+	static int provided;
+	
+	if(provided) return;
+	provided = 1;
+	timerprobe = dtpnew((DTName){"timer", "", "1s"}, prov, nil);
+}
+
+static int
+timerenable(DTProbe *)
+{
+	static int gotkproc;
+	
+	if(!gotkproc){
+		kproc("dtracytimer", dtracytimer, nil);
+		gotkproc=1;
+	}
+	return 0;
+}
+
+static void
+timerdisable(DTProbe *)
+{
+}
+
+DTProvider dtracytimerprov = {
+	.name = "timer",
+	.provide = timerprovide,
+	.enable = timerenable,
+	.disable = timerdisable,
+};
diff --git a/sys/src/9/port/mkdevc b/sys/src/9/port/mkdevc
index 283c69a27..8e87636d8 100755
--- a/sys/src/9/port/mkdevc
+++ b/sys/src/9/port/mkdevc
@@ -58,7 +58,8 @@ collect && section == "misc"{
 			if($i ~ "[+=]cur")
 				vgacur[nvgacur++] = $1;
 		}
-	}
+	}else if($1 ~ "^dtracy.*")
+		dtracyprov[ndtracyprov++] = $1;
 }
 
 collect && section == "port"{
@@ -190,6 +191,16 @@ END{
 			printf "%s\n", port[i];
 		printf "\n";
 	}
+	
+	if(ndtracyprov){
+		printf "#include <dtracy.h>\n";
+		for(i = 0; i < ndtracyprov; i++)
+			printf "extern DTProvider %sprov;\n", dtracyprov[i]
+		printf "DTProvider *dtproviders[] = {\n"
+		for(i = 0; i < ndtracyprov; i++)
+			printf "\t&%sprov,\n", dtracyprov[i]
+		printf "\tnil,\n};\n\n"
+	}
 
 	printf "char* conffile = \"%s/%s\";\n", pwd, ARGV[1];
 	printf "ulong kerndate = KERNDATE;\n";