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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_TIMESTATS_H
#define _LINUX_TIMESTATS_H
#include <linux/spinlock_types.h>
#include <linux/types.h>
#define NR_QUANTILES 15
struct quantiles {
struct quantile_entry {
u64 m;
u64 step;
} entries[NR_QUANTILES];
};
struct time_stat_buffer {
unsigned int nr;
struct time_stat_buffer_entry {
u64 start;
u64 end;
} entries[32];
};
struct time_stats {
spinlock_t lock;
u64 count;
/* all fields are in nanoseconds */
u64 average_duration;
u64 average_frequency;
u64 max_duration;
u64 last_event;
struct quantiles quantiles;
struct time_stat_buffer __percpu *buffer;
};
struct seq_buf;
void time_stats_update(struct time_stats *stats, u64 start);
void time_stats_to_text(struct seq_buf *out, struct time_stats *stats);
void time_stats_exit(struct time_stats *stats);
#endif /* _LINUX_TIMESTATS_H */
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