[PATCH] Time and seek optimizations
We did too many gettimeofday() calls, this patch cuts the number by
40%. Use clock_gettime() MONOTONIC instead, it is faster on my system
at least.
This patch also optimizes calling lseek() only when necessary for the
sync io engine.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/fio.h b/fio.h
index faa06a4..cb78f25 100644
--- a/fio.h
+++ b/fio.h
@@ -156,6 +156,7 @@
unsigned long long real_file_size;
unsigned long long file_offset;
unsigned long long last_pos;
+ unsigned long long last_completed_pos;
unsigned long *file_map;
unsigned int num_maps;
@@ -410,6 +411,7 @@
int error; /* output */
unsigned long bytes_done[2]; /* output */
+ struct timeval time; /* output */
};
#define DISK_UTIL_MSEC (250)
@@ -436,7 +438,7 @@
*/
extern void add_clat_sample(struct thread_data *, int, unsigned long);
extern void add_slat_sample(struct thread_data *, int, unsigned long);
-extern void add_bw_sample(struct thread_data *, int);
+extern void add_bw_sample(struct thread_data *, int, struct timeval *);
extern void show_run_stats(void);
extern void init_disk_util(struct thread_data *);
extern void update_rusage_stat(struct thread_data *);
@@ -449,7 +451,6 @@
/*
* Time functions
*/
-extern void time_init(void);
extern unsigned long utime_since(struct timeval *, struct timeval *);
extern unsigned long mtime_since(struct timeval *, struct timeval *);
extern unsigned long mtime_since_now(struct timeval *);
@@ -459,6 +460,7 @@
extern void usec_sleep(struct thread_data *, unsigned long);
extern void rate_throttle(struct thread_data *, unsigned long, unsigned int, int);
extern void fill_start_time(struct timeval *);
+extern void fio_gettime(struct timeval *, void *);
/*
* Init functions