Collects various I/O statistics. More...
#include <iostats.h>
Public Member Functions | |
unsigned | get_reads () const |
Returns total number of reads. | |
unsigned | get_writes () const |
Returns total number of writes. | |
int64 | get_read_volume () const |
Returns number of bytes read from disks. | |
int64 | get_written_volume () const |
Returns number of bytes written to the disks. | |
double | get_read_time () const |
Time that would be spent in read syscalls if all parallel reads were serialized. | |
double | get_write_time () const |
Time that would be spent in write syscalls if all parallel writes were serialized. | |
double | get_pread_time () const |
Period of time when at least one I/O thread was executing a read. | |
double | get_pwrite_time () const |
Period of time when at least one I/O thread was executing a write. | |
double | get_pio_time () const |
Period of time when at least one I/O thread was executing a read or a write. | |
double | get_io_wait_time () const |
I/O wait time counter. | |
double | get_last_reset_time () const |
Return time of the last reset. | |
void | reset () |
Resets I/O time counters (including I/O wait counter). | |
void | _reset_io_wait_time () __attribute__((__deprecated__)) |
Resets I/O wait time counter. |
Collects various I/O statistics.
void stats::_reset_io_wait_time | ( | ) |
Resets I/O wait time counter.
double stats::get_io_wait_time | ( | ) | const [inline] |
I/O wait time counter.
wait_any
and wait_all
double stats::get_last_reset_time | ( | ) | const [inline] |
Return time of the last reset.
double stats::get_pio_time | ( | ) | const [inline] |
Period of time when at least one I/O thread was executing a read or a write.
double stats::get_pread_time | ( | ) | const [inline] |
Period of time when at least one I/O thread was executing a read.
double stats::get_pwrite_time | ( | ) | const [inline] |
Period of time when at least one I/O thread was executing a write.
double stats::get_read_time | ( | ) | const [inline] |
Time that would be spent in read syscalls if all parallel reads were serialized.
int64 stats::get_read_volume | ( | ) | const [inline] |
Returns number of bytes read from disks.
unsigned stats::get_reads | ( | ) | const [inline] |
Returns total number of reads.
double stats::get_write_time | ( | ) | const [inline] |
Time that would be spent in write syscalls if all parallel writes were serialized.
unsigned stats::get_writes | ( | ) | const [inline] |
Returns total number of writes.
int64 stats::get_written_volume | ( | ) | const [inline] |
Returns number of bytes written to the disks.
void stats::reset | ( | ) |
Resets I/O time counters (including I/O wait counter).