-
Notifications
You must be signed in to change notification settings - Fork 1.3k
/
Copy pathwindowsaio.c
585 lines (486 loc) · 13.5 KB
/
windowsaio.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
/*
* windowsaio engine
*
* IO engine using Windows IO Completion Ports.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <errno.h>
#include "../fio.h"
#include "../optgroup.h"
typedef BOOL (WINAPI *CANCELIOEX)(HANDLE hFile, LPOVERLAPPED lpOverlapped);
int geterrno_from_win_error (DWORD code, int deferrno);
struct fio_overlapped {
OVERLAPPED o;
struct io_u *io_u;
BOOL io_complete;
};
struct windowsaio_data {
struct io_u **aio_events;
HANDLE iocp;
HANDLE iothread;
HANDLE iocomplete_event;
BOOL iothread_running;
};
struct thread_ctx {
HANDLE iocp;
struct windowsaio_data *wd;
};
struct windowsaio_options {
struct thread_data *td;
unsigned int no_completion_thread;
};
static struct fio_option options[] = {
{
.name = "no_completion_thread",
.lname = "No completion polling thread",
.type = FIO_OPT_STR_SET,
.off1 = offsetof(struct windowsaio_options, no_completion_thread),
.help = "Use to avoid separate completion polling thread",
.category = FIO_OPT_C_ENGINE,
.group = FIO_OPT_G_WINDOWSAIO,
},
{
.name = NULL,
},
};
static DWORD WINAPI IoCompletionRoutine(LPVOID lpParameter);
static int fio_windowsaio_init(struct thread_data *td)
{
struct windowsaio_data *wd;
int rc = 0;
wd = calloc(1, sizeof(struct windowsaio_data));
if (wd == NULL) {
log_err("windowsaio: failed to allocate memory for engine data\n");
rc = 1;
}
if (!rc) {
wd->aio_events = malloc(td->o.iodepth * sizeof(struct io_u*));
if (wd->aio_events == NULL) {
log_err("windowsaio: failed to allocate memory for aio events list\n");
rc = 1;
}
}
if (!rc) {
/* Create an auto-reset event */
wd->iocomplete_event = CreateEvent(NULL, FALSE, FALSE, NULL);
if (wd->iocomplete_event == NULL) {
log_err("windowsaio: failed to create io complete event handle\n");
rc = 1;
}
}
if (rc) {
if (wd != NULL) {
if (wd->aio_events != NULL)
free(wd->aio_events);
free(wd);
}
}
td->io_ops_data = wd;
if (!rc) {
struct thread_ctx *ctx;
struct windowsaio_data *wd;
HANDLE hFile;
struct windowsaio_options *o = td->eo;
hFile = CreateIoCompletionPort(INVALID_HANDLE_VALUE, NULL, 0, 0);
if (hFile == INVALID_HANDLE_VALUE) {
log_err("windowsaio: failed to create io completion port\n");
rc = 1;
}
wd = td->io_ops_data;
wd->iothread_running = TRUE;
wd->iocp = hFile;
if (o->no_completion_thread == 0) {
if (!rc)
ctx = malloc(sizeof(struct thread_ctx));
if (!rc && ctx == NULL) {
log_err("windowsaio: failed to allocate memory for thread context structure\n");
CloseHandle(hFile);
rc = 1;
}
if (!rc) {
DWORD threadid;
ctx->iocp = hFile;
ctx->wd = wd;
wd->iothread = CreateThread(NULL, 0, IoCompletionRoutine, ctx, 0, &threadid);
if (!wd->iothread)
log_err("windowsaio: failed to create io completion thread\n");
else if (fio_option_is_set(&td->o, cpumask))
fio_setaffinity(threadid, td->o.cpumask);
}
if (rc || wd->iothread == NULL)
rc = 1;
}
}
return rc;
}
static void fio_windowsaio_cleanup(struct thread_data *td)
{
struct windowsaio_data *wd;
wd = td->io_ops_data;
if (wd != NULL) {
wd->iothread_running = FALSE;
WaitForSingleObject(wd->iothread, INFINITE);
CloseHandle(wd->iothread);
CloseHandle(wd->iocomplete_event);
free(wd->aio_events);
free(wd);
td->io_ops_data = NULL;
}
}
static int windowsaio_invalidate_cache(struct fio_file *f)
{
DWORD error;
DWORD isharemode = (FILE_SHARE_DELETE | FILE_SHARE_READ |
FILE_SHARE_WRITE);
HANDLE ihFile;
int rc = 0;
/*
* Encourage Windows to drop cached parts of a file by temporarily
* opening it for non-buffered access. Note: this will only work when
* the following is the only thing with the file open on the whole
* system.
*/
dprint(FD_IO, "windowaio: attempt invalidate cache for %s\n",
f->file_name);
ihFile = CreateFile(f->file_name, 0, isharemode, NULL, OPEN_EXISTING,
FILE_FLAG_NO_BUFFERING, NULL);
if (ihFile != INVALID_HANDLE_VALUE) {
if (!CloseHandle(ihFile)) {
error = GetLastError();
log_info("windowsaio: invalidation fd close %s failed: error %lu\n",
f->file_name, error);
rc = 1;
}
} else {
error = GetLastError();
if (error != ERROR_FILE_NOT_FOUND) {
log_info("windowsaio: cache invalidation of %s failed: error %lu\n",
f->file_name, error);
rc = 1;
}
}
return rc;
}
static int fio_windowsaio_open_file(struct thread_data *td, struct fio_file *f)
{
int rc = 0;
DWORD flags = FILE_FLAG_POSIX_SEMANTICS | FILE_FLAG_OVERLAPPED;
DWORD sharemode = FILE_SHARE_READ | FILE_SHARE_WRITE;
DWORD openmode = OPEN_ALWAYS;
DWORD access;
dprint(FD_FILE, "fd open %s\n", f->file_name);
if (f->filetype == FIO_TYPE_PIPE) {
log_err("windowsaio: pipes are not supported\n");
return 1;
}
if (!strcmp(f->file_name, "-")) {
log_err("windowsaio: can't read/write to stdin/out\n");
return 1;
}
if (td->o.odirect)
flags |= FILE_FLAG_NO_BUFFERING;
if (td->o.sync_io)
flags |= FILE_FLAG_WRITE_THROUGH;
/*
* Inform Windows whether we're going to be doing sequential or
* random IO so it can tune the Cache Manager
*/
switch (td->o.fadvise_hint) {
case F_ADV_TYPE:
if (td_random(td))
flags |= FILE_FLAG_RANDOM_ACCESS;
else
flags |= FILE_FLAG_SEQUENTIAL_SCAN;
break;
case F_ADV_RANDOM:
flags |= FILE_FLAG_RANDOM_ACCESS;
break;
case F_ADV_SEQUENTIAL:
flags |= FILE_FLAG_SEQUENTIAL_SCAN;
break;
case F_ADV_NONE:
break;
default:
log_err("fio: unknown fadvise type %d\n", td->o.fadvise_hint);
}
if ((!td_write(td) && !(td->flags & TD_F_SYNCS)) || read_only)
access = GENERIC_READ;
else
access = (GENERIC_READ | GENERIC_WRITE);
if (td->o.create_on_open)
openmode = OPEN_ALWAYS;
else
openmode = OPEN_EXISTING;
/* If we're going to use direct I/O, Windows will try and invalidate
* its cache at that point so there's no need to do it here */
if (td->o.invalidate_cache && !td->o.odirect)
windowsaio_invalidate_cache(f);
f->hFile = CreateFile(f->file_name, access, sharemode,
NULL, openmode, flags, NULL);
if (f->hFile == INVALID_HANDLE_VALUE) {
log_err("windowsaio: failed to open file \"%s\"\n", f->file_name);
rc = 1;
}
/* Only set up the completion port and thread if we're not just
* querying the device size */
if (!rc && td->io_ops_data != NULL) {
struct windowsaio_data *wd;
wd = td->io_ops_data;
if (CreateIoCompletionPort(f->hFile, wd->iocp, 0, 0) == NULL) {
log_err("windowsaio: failed to create io completion port\n");
rc = 1;
}
}
return rc;
}
static int fio_windowsaio_close_file(struct thread_data fio_unused *td, struct fio_file *f)
{
int rc = 0;
dprint(FD_FILE, "fd close %s\n", f->file_name);
if (f->hFile != INVALID_HANDLE_VALUE) {
if (!CloseHandle(f->hFile)) {
log_info("windowsaio: failed to close file handle for \"%s\"\n", f->file_name);
rc = 1;
}
}
f->hFile = INVALID_HANDLE_VALUE;
return rc;
}
static BOOL timeout_expired(DWORD start_count, DWORD end_count)
{
BOOL expired = FALSE;
DWORD current_time;
current_time = GetTickCount();
if ((end_count > start_count) && current_time >= end_count)
expired = TRUE;
else if (current_time < start_count && current_time > end_count)
expired = TRUE;
return expired;
}
static struct io_u* fio_windowsaio_event(struct thread_data *td, int event)
{
struct windowsaio_data *wd = td->io_ops_data;
return wd->aio_events[event];
}
/* dequeue completion entrees directly (no separate completion thread) */
static int fio_windowsaio_getevents_nothread(struct thread_data *td, unsigned int min,
unsigned int max, const struct timespec *t)
{
struct windowsaio_data *wd = td->io_ops_data;
unsigned int dequeued = 0;
struct io_u *io_u;
DWORD start_count = 0;
DWORD end_count = 0;
DWORD mswait = 250;
struct fio_overlapped *fov;
if (t != NULL) {
mswait = (t->tv_sec * 1000) + (t->tv_nsec / 1000000);
start_count = GetTickCount();
end_count = start_count + (t->tv_sec * 1000) + (t->tv_nsec / 1000000);
}
do {
BOOL ret;
OVERLAPPED *ovl;
ULONG entries = min(16, max-dequeued);
OVERLAPPED_ENTRY oe[16];
ret = GetQueuedCompletionStatusEx(wd->iocp, oe, 16, &entries, mswait, 0);
if (ret && entries) {
int entry_num;
for (entry_num=0; entry_num<entries; entry_num++) {
ovl = oe[entry_num].lpOverlapped;
fov = CONTAINING_RECORD(ovl, struct fio_overlapped, o);
io_u = fov->io_u;
if (ovl->Internal == ERROR_SUCCESS) {
io_u->resid = io_u->xfer_buflen - ovl->InternalHigh;
io_u->error = 0;
} else {
io_u->resid = io_u->xfer_buflen;
io_u->error = win_to_posix_error(GetLastError());
}
fov->io_complete = FALSE;
wd->aio_events[dequeued] = io_u;
dequeued++;
}
}
if (dequeued >= min ||
(t != NULL && timeout_expired(start_count, end_count)))
break;
} while (1);
return dequeued;
}
/* dequeue completion entrees creates by separate IoCompletionRoutine thread */
static int fio_windowaio_getevents_thread(struct thread_data *td, unsigned int min,
unsigned int max, const struct timespec *t)
{
struct windowsaio_data *wd = td->io_ops_data;
unsigned int dequeued = 0;
struct io_u *io_u;
int i;
struct fio_overlapped *fov;
DWORD start_count = 0;
DWORD end_count = 0;
DWORD status;
DWORD mswait = 250;
if (t != NULL) {
mswait = (t->tv_sec * 1000) + (t->tv_nsec / 1000000);
start_count = GetTickCount();
end_count = start_count + (t->tv_sec * 1000) + (t->tv_nsec / 1000000);
}
do {
io_u_qiter(&td->io_u_all, io_u, i) {
if (!(io_u->flags & IO_U_F_FLIGHT))
continue;
fov = (struct fio_overlapped*)io_u->engine_data;
if (fov->io_complete) {
fov->io_complete = FALSE;
wd->aio_events[dequeued] = io_u;
dequeued++;
}
}
if (dequeued >= min)
break;
if (dequeued < min) {
status = WaitForSingleObject(wd->iocomplete_event, mswait);
if (status != WAIT_OBJECT_0 && dequeued >= min)
break;
}
if (dequeued >= min ||
(t != NULL && timeout_expired(start_count, end_count)))
break;
} while (1);
return dequeued;
}
static int fio_windowsaio_getevents(struct thread_data *td, unsigned int min,
unsigned int max, const struct timespec *t)
{
struct windowsaio_options *o = td->eo;
if (o->no_completion_thread)
return fio_windowsaio_getevents_nothread(td, min, max, t);
return fio_windowaio_getevents_thread(td, min, max, t);
}
static enum fio_q_status fio_windowsaio_queue(struct thread_data *td,
struct io_u *io_u)
{
struct fio_overlapped *o = io_u->engine_data;
LPOVERLAPPED lpOvl = &o->o;
BOOL success = FALSE;
int rc = FIO_Q_COMPLETED;
fio_ro_check(td, io_u);
lpOvl->Internal = 0;
lpOvl->InternalHigh = 0;
lpOvl->Offset = io_u->offset & 0xFFFFFFFF;
lpOvl->OffsetHigh = io_u->offset >> 32;
switch (io_u->ddir) {
case DDIR_WRITE:
success = WriteFile(io_u->file->hFile, io_u->xfer_buf,
io_u->xfer_buflen, NULL, lpOvl);
break;
case DDIR_READ:
success = ReadFile(io_u->file->hFile, io_u->xfer_buf,
io_u->xfer_buflen, NULL, lpOvl);
break;
case DDIR_SYNC:
case DDIR_DATASYNC:
case DDIR_SYNC_FILE_RANGE:
success = FlushFileBuffers(io_u->file->hFile);
if (!success) {
log_err("windowsaio: failed to flush file buffers\n");
io_u->error = win_to_posix_error(GetLastError());
}
return FIO_Q_COMPLETED;
case DDIR_TRIM:
log_err("windowsaio: manual TRIM isn't supported on Windows\n");
io_u->error = 1;
io_u->resid = io_u->xfer_buflen;
return FIO_Q_COMPLETED;
default:
assert(0);
break;
}
if (success || GetLastError() == ERROR_IO_PENDING)
rc = FIO_Q_QUEUED;
else {
io_u->error = win_to_posix_error(GetLastError());
io_u->resid = io_u->xfer_buflen;
}
return rc;
}
/* Runs as a thread and waits for queued IO to complete */
static DWORD WINAPI IoCompletionRoutine(LPVOID lpParameter)
{
OVERLAPPED *ovl;
struct fio_overlapped *fov;
struct io_u *io_u;
struct windowsaio_data *wd;
struct thread_ctx *ctx;
ULONG_PTR ulKey = 0;
DWORD bytes;
ctx = (struct thread_ctx*)lpParameter;
wd = ctx->wd;
do {
BOOL ret;
ret = GetQueuedCompletionStatus(ctx->iocp, &bytes, &ulKey,
&ovl, 250);
if (!ret && ovl == NULL)
continue;
fov = CONTAINING_RECORD(ovl, struct fio_overlapped, o);
io_u = fov->io_u;
if (ovl->Internal == ERROR_SUCCESS) {
io_u->resid = io_u->xfer_buflen - ovl->InternalHigh;
io_u->error = 0;
} else {
io_u->resid = io_u->xfer_buflen;
io_u->error = win_to_posix_error(GetLastError());
}
fov->io_complete = TRUE;
SetEvent(wd->iocomplete_event);
} while (ctx->wd->iothread_running);
CloseHandle(ctx->iocp);
free(ctx);
return 0;
}
static void fio_windowsaio_io_u_free(struct thread_data *td, struct io_u *io_u)
{
struct fio_overlapped *o = io_u->engine_data;
if (o) {
io_u->engine_data = NULL;
free(o);
}
}
static int fio_windowsaio_io_u_init(struct thread_data *td, struct io_u *io_u)
{
struct fio_overlapped *o;
o = malloc(sizeof(*o));
o->io_complete = FALSE;
o->io_u = io_u;
o->o.hEvent = NULL;
io_u->engine_data = o;
return 0;
}
static struct ioengine_ops ioengine = {
.name = "windowsaio",
.version = FIO_IOOPS_VERSION,
.init = fio_windowsaio_init,
.queue = fio_windowsaio_queue,
.getevents = fio_windowsaio_getevents,
.event = fio_windowsaio_event,
.cleanup = fio_windowsaio_cleanup,
.open_file = fio_windowsaio_open_file,
.close_file = fio_windowsaio_close_file,
.get_file_size = generic_get_file_size,
.io_u_init = fio_windowsaio_io_u_init,
.io_u_free = fio_windowsaio_io_u_free,
.options = options,
.option_struct_size = sizeof(struct windowsaio_options),
};
static void fio_init fio_windowsaio_register(void)
{
register_ioengine(&ioengine);
}
static void fio_exit fio_windowsaio_unregister(void)
{
unregister_ioengine(&ioengine);
}