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158 lines
3.8 KiB
158 lines
3.8 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#undef TRACE_SYSTEM |
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#define TRACE_SYSTEM wbt |
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#if !defined(_TRACE_WBT_H) || defined(TRACE_HEADER_MULTI_READ) |
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#define _TRACE_WBT_H |
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#include <linux/tracepoint.h> |
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#include "../../../block/blk-wbt.h" |
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/** |
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* wbt_stat - trace stats for blk_wb |
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* @stat: array of read/write stats |
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*/ |
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TRACE_EVENT(wbt_stat, |
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TP_PROTO(struct backing_dev_info *bdi, struct blk_rq_stat *stat), |
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TP_ARGS(bdi, stat), |
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TP_STRUCT__entry( |
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__array(char, name, 32) |
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__field(s64, rmean) |
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__field(u64, rmin) |
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__field(u64, rmax) |
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__field(s64, rnr_samples) |
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__field(s64, rtime) |
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__field(s64, wmean) |
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__field(u64, wmin) |
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__field(u64, wmax) |
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__field(s64, wnr_samples) |
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__field(s64, wtime) |
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), |
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TP_fast_assign( |
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strlcpy(__entry->name, bdi_dev_name(bdi), |
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ARRAY_SIZE(__entry->name)); |
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__entry->rmean = stat[0].mean; |
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__entry->rmin = stat[0].min; |
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__entry->rmax = stat[0].max; |
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__entry->rnr_samples = stat[0].nr_samples; |
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__entry->wmean = stat[1].mean; |
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__entry->wmin = stat[1].min; |
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__entry->wmax = stat[1].max; |
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__entry->wnr_samples = stat[1].nr_samples; |
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), |
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TP_printk("%s: rmean=%llu, rmin=%llu, rmax=%llu, rsamples=%llu, " |
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"wmean=%llu, wmin=%llu, wmax=%llu, wsamples=%llu", |
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__entry->name, __entry->rmean, __entry->rmin, __entry->rmax, |
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__entry->rnr_samples, __entry->wmean, __entry->wmin, |
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__entry->wmax, __entry->wnr_samples) |
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); |
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/** |
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* wbt_lat - trace latency event |
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* @lat: latency trigger |
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*/ |
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TRACE_EVENT(wbt_lat, |
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TP_PROTO(struct backing_dev_info *bdi, unsigned long lat), |
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TP_ARGS(bdi, lat), |
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TP_STRUCT__entry( |
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__array(char, name, 32) |
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__field(unsigned long, lat) |
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), |
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TP_fast_assign( |
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strlcpy(__entry->name, bdi_dev_name(bdi), |
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ARRAY_SIZE(__entry->name)); |
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__entry->lat = div_u64(lat, 1000); |
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), |
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TP_printk("%s: latency %lluus", __entry->name, |
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(unsigned long long) __entry->lat) |
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); |
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/** |
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* wbt_step - trace wb event step |
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* @msg: context message |
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* @step: the current scale step count |
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* @window: the current monitoring window |
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* @bg: the current background queue limit |
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* @normal: the current normal writeback limit |
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* @max: the current max throughput writeback limit |
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*/ |
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TRACE_EVENT(wbt_step, |
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TP_PROTO(struct backing_dev_info *bdi, const char *msg, |
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int step, unsigned long window, unsigned int bg, |
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unsigned int normal, unsigned int max), |
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TP_ARGS(bdi, msg, step, window, bg, normal, max), |
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TP_STRUCT__entry( |
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__array(char, name, 32) |
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__field(const char *, msg) |
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__field(int, step) |
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__field(unsigned long, window) |
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__field(unsigned int, bg) |
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__field(unsigned int, normal) |
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__field(unsigned int, max) |
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), |
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TP_fast_assign( |
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strlcpy(__entry->name, bdi_dev_name(bdi), |
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ARRAY_SIZE(__entry->name)); |
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__entry->msg = msg; |
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__entry->step = step; |
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__entry->window = div_u64(window, 1000); |
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__entry->bg = bg; |
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__entry->normal = normal; |
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__entry->max = max; |
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), |
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TP_printk("%s: %s: step=%d, window=%luus, background=%u, normal=%u, max=%u", |
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__entry->name, __entry->msg, __entry->step, __entry->window, |
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__entry->bg, __entry->normal, __entry->max) |
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); |
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/** |
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* wbt_timer - trace wb timer event |
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* @status: timer state status |
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* @step: the current scale step count |
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* @inflight: tracked writes inflight |
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*/ |
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TRACE_EVENT(wbt_timer, |
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TP_PROTO(struct backing_dev_info *bdi, unsigned int status, |
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int step, unsigned int inflight), |
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TP_ARGS(bdi, status, step, inflight), |
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TP_STRUCT__entry( |
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__array(char, name, 32) |
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__field(unsigned int, status) |
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__field(int, step) |
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__field(unsigned int, inflight) |
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), |
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TP_fast_assign( |
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strlcpy(__entry->name, bdi_dev_name(bdi), |
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ARRAY_SIZE(__entry->name)); |
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__entry->status = status; |
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__entry->step = step; |
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__entry->inflight = inflight; |
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), |
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TP_printk("%s: status=%u, step=%d, inflight=%u", __entry->name, |
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__entry->status, __entry->step, __entry->inflight) |
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); |
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#endif /* _TRACE_WBT_H */ |
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/* This part must be outside protection */ |
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#include <trace/define_trace.h>
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