Add code to print interrupt statistics when they will be

exported via sysctl.

1 files changed, 42 insertions, 0 deletions

diff --git a/release/picobsd/tinyware/vm/vm.c b/release/picobsd/tinyware/vm/vm.c
index 482a2be286b9..f75a54a6ee8d 100644
--- a/release/picobsd/tinyware/vm/vm.c
+++ b/release/picobsd/tinyware/vm/vm.c
@@ -35,12 +35,54 @@
 #define pgtok(a) ((a) * (u_int) pagesize >> 10)
 
 int
+vm_i()
+{
+#define CNT	49
+	int cnt[CNT];
+	char names[CNT*16];
+	char *a, *namep[CNT*16];
+	int i,len;
+	long long inttotal=0;
+	long uptime=1;
+
+	len=sizeof(cnt);
+	i = sysctlbyname("kern.intrcnt", &cnt, &len, NULL, 0);
+	if (i != 0)
+		return i ;
+	len=sizeof(names);
+	i = sysctlbyname("kern.intrnames", &names, &len, NULL, 0);
+	if (i != 0)
+		return i ;
+	
+	for( i=0, a = names ; i < CNT && a < names+sizeof(names) ; ) {
+	    namep[i++] = a++;
+	    while (a < names+sizeof(names) && *a)
+		a++ ;
+	    a++ ; /* skip \0 */
+	}
+	printf("interrupt                   total       rate\n");
+        inttotal = 0;
+	for (i=0; i< CNT ; i++)
+	    if (cnt[i] >0) {
+		printf("%-12s %20lu %10lu\n", namep[i], cnt[i], cnt[i]/uptime);
+                inttotal += cnt[i];
+	    }
+        printf("Total        %20llu %10llu\n", inttotal,
+                        inttotal / (u_int64_t) uptime);
+	return 0;
+}
+int
 main(int argc, char *argv[])
 {
 	int mib[2],i=0,len;
 	int pagesize, pagesize_len;
 	struct vmtotal v;
 
+	if (argc > 1 && !strcmp(argv[1], "-i")) {
+	    if (vm_i())
+		fprintf(stderr, "vm -i stats not available via sysctl\n");
+		return 0 ;
+	}
 	pagesize_len = sizeof(int);
 	sysctlbyname("vm.stats.vm.v_page_size",&pagesize,&pagesize_len,NULL,0);