mirror of
https://github.com/schoebel/mars
synced 2024-12-13 18:25:46 +00:00
106 lines
2.2 KiB
C
106 lines
2.2 KiB
C
// (c) 2010 Thomas Schoebel-Theuer / 1&1 Internet AG
|
|
#ifndef MARS_AIO_H
|
|
#define MARS_AIO_H
|
|
|
|
#include <linux/aio.h>
|
|
#include <linux/syscalls.h>
|
|
|
|
#define AIO_SUBMIT_MAX_LATENCY 1000 // 1 ms
|
|
#define AIO_IO_R_MAX_LATENCY 50000 // 50 ms
|
|
#define AIO_IO_W_MAX_LATENCY 150000 // 150 ms
|
|
#define AIO_SYNC_MAX_LATENCY 150000 // 150 ms
|
|
|
|
extern struct threshold aio_submit_threshold;
|
|
extern struct threshold aio_io_threshold[2];
|
|
extern struct threshold aio_sync_threshold;
|
|
|
|
/* aio_sync_mode:
|
|
* 0 = filemap_write_and_wait_range()
|
|
* 1 = fdatasync()
|
|
* 2 = fsync()
|
|
*/
|
|
extern int aio_sync_mode;
|
|
|
|
//#define USE_CLEVER_SYNC // TODO: NYI (should result in better write performance)
|
|
#ifdef USE_CLEVER_SYNC
|
|
|
|
#include "lib_pairing_heap.h"
|
|
|
|
_PAIRING_HEAP_TYPEDEF(sync,);
|
|
|
|
struct q_sync {
|
|
struct pairing_heap_sync *heap[MARS_PRIO_NR];
|
|
};
|
|
|
|
#endif
|
|
|
|
struct aio_mref_aspect {
|
|
GENERIC_ASPECT(mref);
|
|
#ifdef USE_CLEVER_SYNC
|
|
struct pairing_heap_sync heap_head;
|
|
#endif
|
|
struct list_head io_head;
|
|
unsigned long long enqueue_stamp;
|
|
long long start_jiffies;
|
|
int resubmit;
|
|
int alloc_len;
|
|
bool do_dealloc;
|
|
};
|
|
|
|
struct aio_brick {
|
|
MARS_BRICK(aio);
|
|
// parameters
|
|
bool o_creat;
|
|
bool o_direct;
|
|
bool o_fdsync;
|
|
};
|
|
|
|
struct aio_input {
|
|
MARS_INPUT(aio);
|
|
};
|
|
|
|
struct aio_threadinfo {
|
|
struct list_head mref_list[MARS_PRIO_NR];
|
|
struct aio_output *output;
|
|
struct task_struct *thread;
|
|
wait_queue_head_t event;
|
|
wait_queue_head_t terminate_event;
|
|
spinlock_t lock;
|
|
int queued[MARS_PRIO_NR];
|
|
atomic_t queued_sum;
|
|
atomic_t total_enqueue_count;
|
|
bool terminated;
|
|
};
|
|
|
|
struct aio_output {
|
|
MARS_OUTPUT(aio);
|
|
// private
|
|
struct mapfree_info *mf;
|
|
int fd; // FIXME: remove this!
|
|
struct aio_threadinfo tinfo[3];
|
|
loff_t old_size;
|
|
aio_context_t ctxp;
|
|
wait_queue_head_t fdsync_event;
|
|
bool fdsync_active;
|
|
// statistics
|
|
int index;
|
|
atomic_t total_read_count;
|
|
atomic_t total_write_count;
|
|
atomic_t total_alloc_count;
|
|
atomic_t total_submit_count;
|
|
atomic_t total_again_count;
|
|
atomic_t total_delay_count;
|
|
atomic_t total_msleep_count;
|
|
atomic_t total_fdsync_count;
|
|
atomic_t total_fdsync_wait_count;
|
|
atomic_t total_mapfree_count;
|
|
atomic_t read_count;
|
|
atomic_t write_count;
|
|
atomic_t alloc_count;
|
|
atomic_t submit_count;
|
|
};
|
|
|
|
MARS_TYPES(aio);
|
|
|
|
#endif
|