159 lines · c
1/* SPDX-License-Identifier: GPL-2.0 */2#undef TRACE_SYSTEM3#define TRACE_SYSTEM wbt4 5#if !defined(_TRACE_WBT_H) || defined(TRACE_HEADER_MULTI_READ)6#define _TRACE_WBT_H7 8#include <linux/tracepoint.h>9#include "../../../block/blk-wbt.h"10 11/**12 * wbt_stat - trace stats for blk_wb13 * @stat: array of read/write stats14 */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 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 event57 * @lat: latency trigger58 */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 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 step82 * @msg: context message83 * @step: the current scale step count84 * @window: the current monitoring window85 * @bg: the current background queue limit86 * @normal: the current normal writeback limit87 * @max: the current max throughput writeback limit88 */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 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 event125 * @status: timer state status126 * @step: the current scale step count127 * @inflight: tracked writes inflight128 */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 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