-static int cs_read (void)
-{
- FILE *fh;
- char buffer[64];
- int numfields;
- char *fields[3];
- derive_t result = 0;
- int status = -2;
-
- fh = fopen ("/proc/stat", "r");
- if (fh == NULL) {
- ERROR ("contextswitch plugin: unable to open /proc/stat: %s",
- sstrerror (errno, buffer, sizeof (buffer)));
- return (-1);
- }
-
- while (fgets(buffer, sizeof(buffer), fh) != NULL)
- {
- char *endptr;
-
- numfields = strsplit(buffer, fields, STATIC_ARRAY_SIZE (fields));
- if (numfields != 2)
- continue;
-
- if (strcmp("ctxt", fields[0]) != 0)
- continue;
-
- errno = 0;
- endptr = NULL;
- result = (derive_t) strtoll (fields[1], &endptr, /* base = */ 10);
- if ((endptr == fields[1]) || (errno != 0)) {
- ERROR ("contextswitch plugin: Cannot parse ctxt value: %s",
- fields[1]);
- status = -1;
- break;
- }
-
- cs_submit(result);
- status = 0;
- break;
- }
- fclose(fh);
-
- if (status == -2)
- ERROR ("contextswitch plugin: Unable to find context switch value.");
-
- return status;
+static int cs_read(void) {
+#if HAVE_SYSCTLBYNAME
+ int value = 0;
+ size_t value_len = sizeof(value);
+ int status;
+
+ status = sysctlbyname("vm.stats.sys.v_swtch", &value, &value_len,
+ /* new pointer = */ NULL, /* new length = */ 0);
+ if (status != 0) {
+ ERROR("contextswitch plugin: sysctlbyname "
+ "(vm.stats.sys.v_swtch) failed");
+ return -1;
+ }
+
+ cs_submit(value);
+/* #endif HAVE_SYSCTLBYNAME */
+
+#elif KERNEL_LINUX
+ FILE *fh;
+ char buffer[64];
+ int numfields;
+ char *fields[3];
+ derive_t result = 0;
+ int status = -2;
+
+ fh = fopen("/proc/stat", "r");
+ if (fh == NULL) {
+ ERROR("contextswitch plugin: unable to open /proc/stat: %s", STRERRNO);
+ return -1;
+ }
+
+ while (fgets(buffer, sizeof(buffer), fh) != NULL) {
+ char *endptr;
+
+ numfields = strsplit(buffer, fields, STATIC_ARRAY_SIZE(fields));
+ if (numfields != 2)
+ continue;
+
+ if (strcmp("ctxt", fields[0]) != 0)
+ continue;
+
+ errno = 0;
+ endptr = NULL;
+ result = (derive_t)strtoll(fields[1], &endptr, /* base = */ 10);
+ if ((endptr == fields[1]) || (errno != 0)) {
+ ERROR("contextswitch plugin: Cannot parse ctxt value: %s", fields[1]);
+ status = -1;
+ break;
+ }
+
+ cs_submit(result);
+ status = 0;
+ break;
+ }
+ fclose(fh);
+
+ if (status == -2)
+ ERROR("contextswitch plugin: Unable to find context switch value.");
+/* #endif KERNEL_LINUX */
+
+#elif HAVE_PERFSTAT
+ int status = 0;
+ perfstat_cpu_total_t perfcputotal;
+
+ status =
+ perfstat_cpu_total(NULL, &perfcputotal, sizeof(perfstat_cpu_total_t), 1);
+ if (status < 0) {
+ ERROR("contextswitch plugin: perfstat_cpu_total: %s", STRERRNO);
+ return -1;
+ }
+
+ cs_submit(perfcputotal.pswitch);
+ status = 0;
+#endif /* defined(HAVE_PERFSTAT) */
+
+ return status;