add ^T^Ti (interrupt summary)

Reference: /n/atom/patch/applied/nixtti
Date: Sat Mar 22 20:15:18 CET 2014
Signed-off-by: quanstro@quanstro.net

--- /sys/src/nix/k10/trap.c	Sat Mar 22 20:15:07 2014
+++ /sys/src/nix/k10/trap.c	Sat Mar 22 20:15:07 2014
@@ -164,6 +164,22 @@
 }
 
 void
+interruptsummary(void)
+{
+	char vnam[11+1];
+	int vno, af;
+	Vctl *v;
+
+	for(vno=65; vno<256; vno++)
+	for(af = 0; af < sys->nmach; af++)
+	for(v=vctl[af][vno]; v; v=v->next){
+		snprint(vnam, sizeof vnam, "%d.%d", vno, v->affinity);
+		print("%11s %11d %20llud %20llud %-*.*s %.*s\n",
+			vnam, v->irq, v->count, v->cycles, 8, 8, v->type, KNAMELEN, v->name);
+	}
+}
+
+void
 trapinit(void)
 {
 	/*
--- /sys/src/nix/port/portfns.h	Sat Mar 22 20:15:07 2014
+++ /sys/src/nix/port/portfns.h	Sat Mar 22 20:15:07 2014
@@ -130,6 +130,7 @@
 void		ilock(Lock*);
 int		incref(Ref*);
 void		initimage(void);
+void		interruptsummary(void);
 int		iprint(char*, ...);
 void		isdir(Chan*);
 int		iseve(void);
--- /sys/src/nix/port/devcons.c	Sat Mar 22 20:15:07 2014
+++ /sys/src/nix/port/devcons.c	Sat Mar 22 20:15:07 2014
@@ -550,6 +550,9 @@
 		case 'k':
 			killbig("^t ^t k");
 			return;
+		case 'i':
+			interruptsummary();
+			return;
 		case 'r':
 			exit(0);
 			return;