/* -*- linux-c -*- * Statistics Header * Copyright (C) 2005-2016 Red Hat Inc. * * This file is part of systemtap, and is free software. You can * redistribute it and/or modify it under the terms of the GNU General * Public License (GPL); either version 2, or (at your option) any * later version. */ #ifndef _STAT_H_ #define _STAT_H_ /* maximum buckets for a linear histogram */ #ifndef STP_MAX_BUCKETS #define STP_MAX_BUCKETS 128 #endif /* buckets for log histogram. */ #define HIST_LOG_BUCKETS 128 #define HIST_LOG_BUCKET0 64 /* statistical operations used with a global */ #define STAT_OP_COUNT 1 << 1 #define STAT_OP_SUM 1 << 2 #define STAT_OP_MIN 1 << 3 #define STAT_OP_MAX 1 << 4 #define STAT_OP_AVG 1 << 5 #define STAT_OP_VARIANCE 1 << 6 /** other defines used for passing translator information to the runtime values must not collide with the above statistical operations defines */ #define KEY_MAPENTRIES 1 << 7 #define KEY_STAT_WRAP 1 << 8 #define KEY_HIST_TYPE 1 << 9 /** 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 { int shift; int stat_ops; int64_t count; int64_t sum; int64_t min, max; int64_t avg_s; int64_t _M2; int64_t variance; int64_t variance_s; int64_t histogram[]; }; typedef struct stat_data stat_data; /** Information about the histogram data collected. This data is global and not duplicated per-cpu. */ struct _Hist { enum histtype type; int start; int stop; int interval; int buckets; int bit_shift; int stat_ops; }; typedef struct _Hist *Hist; /* The specific runtimes define struct _Stat and its alloc/free */ #if defined(__KERNEL__) #include "linux/stat_runtime.h" #elif defined(__DYNINST__) #include "dyninst/stat_runtime.h" #endif #endif /* _STAT_H_ */

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