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 strscpy(__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 */
59 TRACE_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 strscpy(__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 */
89 TRACE_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 strscpy(__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 */
129 TRACE_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 strscpy(__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>
159
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