include/trace/events/wbt.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #undef TRACE_SYSTEM
   3 #define TRACE_SYSTEM wbt
   4
   5 #if !defined(_TRACE_WBT_H) || defined(TRACE_HEADER_MULTI_READ)
   6 #define _TRACE_WBT_H
   7
   8 #include <linux/tracepoint.h>
   9 #include "../../../block/blk-wbt.h"
  10
  11 /**
  12  * wbt_stat - trace stats for blk_wb
  13  * @stat: array of read/write stats
  14  */
  15 TRACE_EVENT(wbt_stat,
  16
  17         TP_PROTO(struct backing_dev_info *bdi, struct blk_rq_stat *stat),
  18
  19         TP_ARGS(bdi, stat),
  20
  21         TP_STRUCT__entry(
  22                 __array(char, name, 32)
  23                 __field(s64, rmean)
  24                 __field(u64, rmin)
  25                 __field(u64, rmax)
  26                 __field(s64, rnr_samples)
  27                 __field(s64, rtime)
  28                 __field(s64, wmean)
  29                 __field(u64, wmin)
  30                 __field(u64, wmax)
  31                 __field(s64, wnr_samples)
  32                 __field(s64, wtime)
  33         ),
  34
  35         TP_fast_assign(
  36                 strncpy(__entry->name, dev_name(bdi->dev), 32);
  37                 __entry->rmean          = stat[0].mean;
  38                 __entry->rmin           = stat[0].min;
  39                 __entry->rmax           = stat[0].max;
  40                 __entry->rnr_samples    = stat[0].nr_samples;
  41                 __entry->wmean          = stat[1].mean;
  42                 __entry->wmin           = stat[1].min;
  43                 __entry->wmax           = stat[1].max;
  44                 __entry->wnr_samples    = stat[1].nr_samples;
  45         ),
  46
  47         TP_printk("%s: rmean=%llu, rmin=%llu, rmax=%llu, rsamples=%llu, "
  48                   "wmean=%llu, wmin=%llu, wmax=%llu, wsamples=%llu\n",
  49                   __entry->name, __entry->rmean, __entry->rmin, __entry->rmax,
  50                   __entry->rnr_samples, __entry->wmean, __entry->wmin,
  51                   __entry->wmax, __entry->wnr_samples)
  52 );
  53
  54 /**
  55  * wbt_lat - trace latency event
  56  * @lat: latency trigger
  57  */
  58 TRACE_EVENT(wbt_lat,
  59
  60         TP_PROTO(struct backing_dev_info *bdi, unsigned long lat),
  61
  62         TP_ARGS(bdi, lat),
  63
  64         TP_STRUCT__entry(
  65                 __array(char, name, 32)
  66                 __field(unsigned long, lat)
  67         ),
  68
  69         TP_fast_assign(
  70                 strncpy(__entry->name, dev_name(bdi->dev), 32);
  71                 __entry->lat = div_u64(lat, 1000);
  72         ),
  73
  74         TP_printk("%s: latency %lluus\n", __entry->name,
  75                         (unsigned long long) __entry->lat)
  76 );
  77
  78 /**
  79  * wbt_step - trace wb event step
  80  * @msg: context message
  81  * @step: the current scale step count
  82  * @window: the current monitoring window
  83  * @bg: the current background queue limit
  84  * @normal: the current normal writeback limit
  85  * @max: the current max throughput writeback limit
  86  */
  87 TRACE_EVENT(wbt_step,
  88
  89         TP_PROTO(struct backing_dev_info *bdi, const char *msg,
  90                  int step, unsigned long window, unsigned int bg,
  91                  unsigned int normal, unsigned int max),
  92
  93         TP_ARGS(bdi, msg, step, window, bg, normal, max),
  94
  95         TP_STRUCT__entry(
  96                 __array(char, name, 32)
  97                 __field(const char *, msg)
  98                 __field(int, step)
  99                 __field(unsigned long, window)
 100                 __field(unsigned int, bg)
 101                 __field(unsigned int, normal)
 102                 __field(unsigned int, max)
 103         ),
 104
 105         TP_fast_assign(
 106                 strncpy(__entry->name, dev_name(bdi->dev), 32);
 107                 __entry->msg    = msg;
 108                 __entry->step   = step;
 109                 __entry->window = div_u64(window, 1000);
 110                 __entry->bg     = bg;
 111                 __entry->normal = normal;
 112                 __entry->max    = max;
 113         ),
 114
 115         TP_printk("%s: %s: step=%d, window=%luus, background=%u, normal=%u, max=%u\n",
 116                   __entry->name, __entry->msg, __entry->step, __entry->window,
 117                   __entry->bg, __entry->normal, __entry->max)
 118 );
 119
 120 /**
 121  * wbt_timer - trace wb timer event
 122  * @status: timer state status
 123  * @step: the current scale step count
 124  * @inflight: tracked writes inflight
 125  */
 126 TRACE_EVENT(wbt_timer,
 127
 128         TP_PROTO(struct backing_dev_info *bdi, unsigned int status,
 129                  int step, unsigned int inflight),
 130
 131         TP_ARGS(bdi, status, step, inflight),
 132
 133         TP_STRUCT__entry(
 134                 __array(char, name, 32)
 135                 __field(unsigned int, status)
 136                 __field(int, step)
 137                 __field(unsigned int, inflight)
 138         ),
 139
 140         TP_fast_assign(
 141                 strncpy(__entry->name, dev_name(bdi->dev), 32);
 142                 __entry->status         = status;
 143                 __entry->step           = step;
 144                 __entry->inflight       = inflight;
 145         ),
 146
 147         TP_printk("%s: status=%u, step=%d, inflight=%u\n", __entry->name,
 148                   __entry->status, __entry->step, __entry->inflight)
 149 );
 150
 151 #endif /* _TRACE_WBT_H */
 152
 153 /* This part must be outside protection */
 154 #include <trace/define_trace.h>