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-rw-r--r--src/sysfs.c47
1 files changed, 47 insertions, 0 deletions
diff --git a/src/sysfs.c b/src/sysfs.c
new file mode 100644
index 0000000..ea59c1b
--- /dev/null
+++ b/src/sysfs.c
@@ -0,0 +1,47 @@
+#include <glib.h>
+#include <stdio.h>
+#include "sysfs.h"
+#include "zenmonitor.h"
+
+gshort* get_cpu_dev_ids(){
+ gshort *cpu_dev_ids = NULL;
+ gshort coreid, cpuid;
+ GDir *dir;
+ const gchar *entry;
+ gchar *filename, *buffer;
+ guint cores, i;
+
+ cores = get_core_count();
+ cpu_dev_ids = malloc(cores * sizeof (gshort));
+ memset(cpu_dev_ids, -1, cores * sizeof (gshort));
+
+ dir = g_dir_open(SYSFS_DIR_CPUS, 0, NULL);
+ if (dir) {
+ while ((entry = g_dir_read_name(dir))) {
+ if (sscanf(entry, "cpu%hd", &cpuid) != 1) {
+ continue;
+ }
+
+ filename = g_build_filename(SYSFS_DIR_CPUS, entry, "topology", "core_id", NULL);
+ if (g_file_get_contents(filename, &buffer, NULL, NULL)) {
+ coreid = (gshort) atoi(buffer);
+
+ if (coreid < cores && cpu_dev_ids[coreid] == -1) {
+ cpu_dev_ids[coreid] = cpuid;
+ }
+ }
+
+ g_free(filename);
+ g_free(buffer);
+ }
+ }
+
+ for (i = 0; i < cores; i++) {
+ if (cpu_dev_ids[i] < 0) {
+ cpu_dev_ids[i] = i;
+ }
+ }
+
+ return cpu_dev_ids;
+}
+