1 files changed, 37 insertions, 0 deletions
diff --git a/runtime/stat.h b/runtime/stat.h
new file mode 100644
index 00000000..50dfc458
--- /dev/null
+++ b/runtime/stat.h
@@ -0,0 +1,37 @@
+#ifndef _STAT_H_ /* -*- linux-c -*- */
+#define _STAT_H_
+
+#ifndef NEED_STAT_LOCKS
+#define NEED_STAT_LOCKS 0
+#endif
+
+/** histogram type */
+enum histtype { HIST_NONE, HIST_LOG, HIST_LINEAR };
+
+/** Statistics are stored in this struct.  This is per-cpu or per-node data 
+    and is variable length due to the unknown size of the histogram. */
+struct stat_data {
+	int64_t count;
+	int64_t sum;
+	int64_t min, max;
+#if NEED_STAT_LOCKS == 1
+	spinlock_t lock;
+#endif
+	int64_t histogram[];
+};
+
+typedef struct stat_data stat;
+
+struct _Stat {
+	enum histtype hist_type;
+	int hist_start;
+	int hist_stop;
+	int hist_int;
+	int hist_buckets;
+	struct stat_data *sd;
+	struct stat_data *agg;
+};
+
+typedef struct _Stat *Stat;
+
+#endif /* _STAT_H_ */