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		strlcpy(__entry->name, bdi_dev_name(bdi),
 37			ARRAY_SIZE(__entry->name));
 38		__entry->rmean		= stat[0].mean;
 39		__entry->rmin		= stat[0].min;
 40		__entry->rmax		= stat[0].max;
 41		__entry->rnr_samples	= stat[0].nr_samples;
 42		__entry->wmean		= stat[1].mean;
 43		__entry->wmin		= stat[1].min;
 44		__entry->wmax		= stat[1].max;
 45		__entry->wnr_samples	= stat[1].nr_samples;
 46	),
 47
 48	TP_printk("%s: rmean=%llu, rmin=%llu, rmax=%llu, rsamples=%llu, "
 49		  "wmean=%llu, wmin=%llu, wmax=%llu, wsamples=%llu",
 50		  __entry->name, __entry->rmean, __entry->rmin, __entry->rmax,
 51		  __entry->rnr_samples, __entry->wmean, __entry->wmin,
 52		  __entry->wmax, __entry->wnr_samples)
 53);
 54
 55/**
 56 * wbt_lat - trace latency event
 57 * @lat: latency trigger
 58 */
 59TRACE_EVENT(wbt_lat,
 60
 61	TP_PROTO(struct backing_dev_info *bdi, unsigned long lat),
 62
 63	TP_ARGS(bdi, lat),
 64
 65	TP_STRUCT__entry(
 66		__array(char, name, 32)
 67		__field(unsigned long, lat)
 68	),
 69
 70	TP_fast_assign(
 71		strlcpy(__entry->name, bdi_dev_name(bdi),
 72			ARRAY_SIZE(__entry->name));
 73		__entry->lat = div_u64(lat, 1000);
 74	),
 75
 76	TP_printk("%s: latency %lluus", __entry->name,
 77			(unsigned long long) __entry->lat)
 78);
 79
 80/**
 81 * wbt_step - trace wb event step
 82 * @msg: context message
 83 * @step: the current scale step count
 84 * @window: the current monitoring window
 85 * @bg: the current background queue limit
 86 * @normal: the current normal writeback limit
 87 * @max: the current max throughput writeback limit
 88 */
 89TRACE_EVENT(wbt_step,
 90
 91	TP_PROTO(struct backing_dev_info *bdi, const char *msg,
 92		 int step, unsigned long window, unsigned int bg,
 93		 unsigned int normal, unsigned int max),
 94
 95	TP_ARGS(bdi, msg, step, window, bg, normal, max),
 96
 97	TP_STRUCT__entry(
 98		__array(char, name, 32)
 99		__field(const char *, msg)
100		__field(int, step)
101		__field(unsigned long, window)
102		__field(unsigned int, bg)
103		__field(unsigned int, normal)
104		__field(unsigned int, max)
105	),
106
107	TP_fast_assign(
108		strlcpy(__entry->name, bdi_dev_name(bdi),
109			ARRAY_SIZE(__entry->name));
110		__entry->msg	= msg;
111		__entry->step	= step;
112		__entry->window	= div_u64(window, 1000);
113		__entry->bg	= bg;
114		__entry->normal	= normal;
115		__entry->max	= max;
116	),
117
118	TP_printk("%s: %s: step=%d, window=%luus, background=%u, normal=%u, max=%u",
119		  __entry->name, __entry->msg, __entry->step, __entry->window,
120		  __entry->bg, __entry->normal, __entry->max)
121);
122
123/**
124 * wbt_timer - trace wb timer event
125 * @status: timer state status
126 * @step: the current scale step count
127 * @inflight: tracked writes inflight
128 */
129TRACE_EVENT(wbt_timer,
130
131	TP_PROTO(struct backing_dev_info *bdi, unsigned int status,
132		 int step, unsigned int inflight),
133
134	TP_ARGS(bdi, status, step, inflight),
135
136	TP_STRUCT__entry(
137		__array(char, name, 32)
138		__field(unsigned int, status)
139		__field(int, step)
140		__field(unsigned int, inflight)
141	),
142
143	TP_fast_assign(
144		strlcpy(__entry->name, bdi_dev_name(bdi),
145			ARRAY_SIZE(__entry->name));
146		__entry->status		= status;
147		__entry->step		= step;
148		__entry->inflight	= inflight;
149	),
150
151	TP_printk("%s: status=%u, step=%d, inflight=%u", __entry->name,
152		  __entry->status, __entry->step, __entry->inflight)
153);
154
155#endif /* _TRACE_WBT_H */
156
157/* This part must be outside protection */
158#include <trace/define_trace.h>