energy/tm_stat.h

   1 #ifndef _TM_STAT_H
   2 #define _TM_STAT_H
   3
   4 /*
   5  *  Dynamic Binary Instrumentation Module based on KProbes
   6  *  energy/tm_stat.h
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  21  *
  22  * Copyright (C) Samsung Electronics, 2013
  23  *
  24  * 2013         Vyacheslav Cherkashin <v.cherkashin@samsung.com>
  25  *
  26  */
  27
  28
  29 #include <linux/types.h>
  30 #include <linux/time.h>
  31
  32
  33 struct tm_stat {
  34         u64 timestamp;
  35         u64 running;
  36 };
  37
  38
  39 #define DEFINE_TM_STAT(tm_name)         \
  40         struct tm_stat tm_name = {      \
  41                 .timestamp = 0,         \
  42                 .running = 0            \
  43         }
  44
  45
  46 static inline u64 get_ntime(void)
  47 {
  48         struct timespec ts;
  49         getnstimeofday(&ts);
  50         return timespec_to_ns(&ts);
  51 }
  52
  53 static inline void tm_stat_init(struct tm_stat *tm)
  54 {
  55         tm->timestamp = 0;
  56         tm->running = 0;
  57 }
  58
  59 static inline void tm_stat_set_timestamp(struct tm_stat *tm, u64 time)
  60 {
  61         tm->timestamp = time;
  62 }
  63
  64 static inline u64 tm_stat_timestamp(struct tm_stat *tm)
  65 {
  66         return tm->timestamp;
  67 }
  68
  69 static inline void tm_stat_update(struct tm_stat *tm, u64 time)
  70 {
  71         tm->running += time - tm->timestamp;
  72 }
  73
  74 static inline u64 tm_stat_running(struct tm_stat *tm)
  75 {
  76         return tm->running;
  77 }
  78
  79 static inline u64 tm_stat_current_running(struct tm_stat *tm, u64 now)
  80 {
  81         if (unlikely(now < tm->timestamp))
  82                 printk("XXX %p WARNING now(%llu) < tmstmp(%llu)\n",
  83                        tm, now, tm->timestamp);
  84         return tm->timestamp ? tm->running + now - tm->timestamp: tm->running;
  85 }
  86
  87 #endif /* _TM_STAT_H */