mirror of https://github.com/schoebel/mars
117 lines
2.8 KiB
C
117 lines
2.8 KiB
C
/*
|
|
* MARS Long Distance Replication Software
|
|
*
|
|
* This file is part of MARS project: http://schoebel.github.io/mars/
|
|
*
|
|
* Copyright (C) 2010-2014 Thomas Schoebel-Theuer
|
|
* Copyright (C) 2011-2014 1&1 Internet AG
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*/
|
|
|
|
#ifndef MARS_AIO_H
|
|
#define MARS_AIO_H
|
|
|
|
#include <linux/aio.h>
|
|
#include <linux/syscalls.h>
|
|
|
|
#include "mars.h"
|
|
#include "lib_mapfree.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;
|
|
|
|
struct aio_mref_aspect {
|
|
GENERIC_ASPECT(mref);
|
|
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;
|
|
bool is_static_device;
|
|
};
|
|
|
|
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;
|
|
struct mutex mutex;
|
|
int queued[MARS_PRIO_NR];
|
|
atomic_t queued_sum;
|
|
atomic_t total_enqueue_count;
|
|
bool should_terminate;
|
|
bool terminated;
|
|
};
|
|
|
|
struct aio_output {
|
|
MARS_OUTPUT(aio);
|
|
// private
|
|
struct mapfree_info *mf;
|
|
int fd; // FIXME: remove this!
|
|
struct aio_threadinfo tinfo[3];
|
|
aio_context_t ctxp;
|
|
wait_queue_head_t fdsync_event;
|
|
bool fdsync_active;
|
|
// statistics
|
|
int index;
|
|
atomic_t work_count;
|
|
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
|