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 */
 15TRACE_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 */
 58TRACE_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 */
 87TRACE_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 */
126TRACE_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>