Commit | Line | Data |
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c9fb4c5b JA |
1 | #include <stdio.h> |
2 | #include <errno.h> | |
3 | #include <assert.h> | |
4 | #include <stdlib.h> | |
5 | #include <stddef.h> | |
6 | #include <signal.h> | |
7 | #include <inttypes.h> | |
8 | ||
9 | #include <sys/types.h> | |
10 | #include <sys/stat.h> | |
11 | #include <sys/ioctl.h> | |
12 | #include <sys/syscall.h> | |
13 | #include <sys/resource.h> | |
c3e2fc25 | 14 | #include <sys/mman.h> |
e31b8288 | 15 | #include <sys/uio.h> |
c9fb4c5b JA |
16 | #include <linux/fs.h> |
17 | #include <fcntl.h> | |
18 | #include <unistd.h> | |
c9fb4c5b JA |
19 | #include <string.h> |
20 | #include <pthread.h> | |
21 | #include <sched.h> | |
22 | ||
74efb029 | 23 | #include "../arch/arch.h" |
57fa61f0 | 24 | #include "../lib/types.h" |
e31b8288 | 25 | #include "../os/io_uring.h" |
ac122fea | 26 | |
e31b8288 | 27 | #define barrier() __asm__ __volatile__("": : :"memory") |
c3e2fc25 | 28 | |
e31b8288 | 29 | #define min(a, b) ((a < b) ? (a) : (b)) |
c3e2fc25 | 30 | |
e31b8288 | 31 | struct io_sq_ring { |
e2239016 JA |
32 | unsigned *head; |
33 | unsigned *tail; | |
34 | unsigned *ring_mask; | |
35 | unsigned *ring_entries; | |
ce1705de | 36 | unsigned *flags; |
e2239016 | 37 | unsigned *array; |
c9fb4c5b JA |
38 | }; |
39 | ||
e31b8288 | 40 | struct io_cq_ring { |
e2239016 JA |
41 | unsigned *head; |
42 | unsigned *tail; | |
43 | unsigned *ring_mask; | |
44 | unsigned *ring_entries; | |
f0403f94 | 45 | struct io_uring_cqe *cqes; |
c9fb4c5b JA |
46 | }; |
47 | ||
701d1277 | 48 | #define DEPTH 128 |
c9fb4c5b | 49 | |
701d1277 JA |
50 | #define BATCH_SUBMIT 64 |
51 | #define BATCH_COMPLETE 64 | |
c9fb4c5b JA |
52 | |
53 | #define BS 4096 | |
54 | ||
a7086591 JA |
55 | #define MAX_FDS 16 |
56 | ||
c3e2fc25 | 57 | static unsigned sq_ring_mask, cq_ring_mask; |
e39c34dc | 58 | |
a7086591 JA |
59 | struct file { |
60 | unsigned long max_blocks; | |
701d1277 | 61 | unsigned pending_ios; |
a7086591 JA |
62 | int fd; |
63 | }; | |
64 | ||
c9fb4c5b JA |
65 | struct submitter { |
66 | pthread_t thread; | |
f310970e | 67 | int ring_fd; |
c9fb4c5b | 68 | struct drand48_data rand; |
e31b8288 | 69 | struct io_sq_ring sq_ring; |
f0403f94 | 70 | struct io_uring_sqe *sqes; |
c3e2fc25 | 71 | struct iovec iovecs[DEPTH]; |
e31b8288 | 72 | struct io_cq_ring cq_ring; |
c9fb4c5b JA |
73 | int inflight; |
74 | unsigned long reaps; | |
75 | unsigned long done; | |
76 | unsigned long calls; | |
305c06ce | 77 | unsigned long cachehit, cachemiss; |
c9fb4c5b | 78 | volatile int finish; |
701d1277 | 79 | |
a7086591 JA |
80 | struct file files[MAX_FDS]; |
81 | unsigned nr_files; | |
82 | unsigned cur_file; | |
c9fb4c5b JA |
83 | }; |
84 | ||
85 | static struct submitter submitters[1]; | |
86 | static volatile int finish; | |
87 | ||
f0403f94 | 88 | static int polled = 1; /* use IO polling */ |
701d1277 | 89 | static int fixedbufs = 1; /* use fixed user buffers */ |
f0403f94 | 90 | static int buffered = 0; /* use buffered IO, not O_DIRECT */ |
3d7d00a3 JA |
91 | static int sq_thread_poll = 0; /* use kernel submission/poller thread */ |
92 | static int sq_thread_cpu = -1; /* pin above thread to this CPU */ | |
c9fb4c5b | 93 | |
2ea53ca3 | 94 | static int io_uring_register_buffers(struct submitter *s) |
c9fb4c5b | 95 | { |
2ea53ca3 JA |
96 | struct io_uring_register_buffers reg = { |
97 | .iovecs = s->iovecs, | |
98 | .nr_iovecs = DEPTH | |
99 | }; | |
100 | ||
101 | return syscall(__NR_sys_io_uring_register, s->ring_fd, | |
102 | IORING_REGISTER_BUFFERS, ®); | |
103 | } | |
104 | ||
a7abc9fb JA |
105 | static int io_uring_register_files(struct submitter *s) |
106 | { | |
107 | struct io_uring_register_files reg; | |
108 | int i, ret; | |
109 | ||
110 | reg.fds = calloc(s->nr_files, sizeof(int)); | |
111 | for (i = 0; i < s->nr_files; i++) | |
112 | reg.fds[i] = s->files[i].fd; | |
113 | reg.nr_fds = s->nr_files; | |
114 | ||
115 | ret = syscall(__NR_sys_io_uring_register, s->ring_fd, | |
116 | IORING_REGISTER_FILES, ®); | |
117 | free(reg.fds); | |
118 | return ret; | |
119 | } | |
120 | ||
2ea53ca3 JA |
121 | static int io_uring_setup(unsigned entries, struct io_uring_params *p) |
122 | { | |
123 | return syscall(__NR_sys_io_uring_setup, entries, p); | |
c9fb4c5b JA |
124 | } |
125 | ||
c3e2fc25 JA |
126 | static int io_uring_enter(struct submitter *s, unsigned int to_submit, |
127 | unsigned int min_complete, unsigned int flags) | |
c9fb4c5b | 128 | { |
f310970e JA |
129 | return syscall(__NR_sys_io_uring_enter, s->ring_fd, to_submit, |
130 | min_complete, flags); | |
c9fb4c5b JA |
131 | } |
132 | ||
133 | static int gettid(void) | |
134 | { | |
135 | return syscall(__NR_gettid); | |
136 | } | |
137 | ||
701d1277 JA |
138 | static unsigned file_depth(struct submitter *s) |
139 | { | |
140 | return (DEPTH + s->nr_files - 1) / s->nr_files; | |
141 | } | |
142 | ||
a7086591 | 143 | static void init_io(struct submitter *s, unsigned index) |
c9fb4c5b | 144 | { |
f0403f94 | 145 | struct io_uring_sqe *sqe = &s->sqes[index]; |
c9fb4c5b | 146 | unsigned long offset; |
a7086591 | 147 | struct file *f; |
c9fb4c5b JA |
148 | long r; |
149 | ||
701d1277 JA |
150 | if (s->nr_files == 1) { |
151 | f = &s->files[0]; | |
152 | } else { | |
153 | f = &s->files[s->cur_file]; | |
154 | if (f->pending_ios >= file_depth(s)) { | |
155 | s->cur_file++; | |
156 | if (s->cur_file == s->nr_files) | |
157 | s->cur_file = 0; | |
158 | } | |
159 | } | |
160 | f->pending_ios++; | |
a7086591 | 161 | |
c9fb4c5b | 162 | lrand48_r(&s->rand, &r); |
a7086591 | 163 | offset = (r % (f->max_blocks - 1)) * BS; |
c9fb4c5b | 164 | |
a7abc9fb | 165 | sqe->flags = IOSQE_FIXED_FILE; |
2ea53ca3 | 166 | sqe->opcode = IORING_OP_READV; |
f0403f94 | 167 | if (fixedbufs) { |
f0403f94 JA |
168 | sqe->addr = s->iovecs[index].iov_base; |
169 | sqe->len = BS; | |
2ea53ca3 JA |
170 | sqe->buf_index = index; |
171 | sqe->flags |= IOSQE_FIXED_BUFFER; | |
f0403f94 | 172 | } else { |
f0403f94 JA |
173 | sqe->addr = &s->iovecs[index]; |
174 | sqe->len = 1; | |
2ea53ca3 | 175 | sqe->buf_index = 0; |
f0403f94 | 176 | } |
f0403f94 | 177 | sqe->ioprio = 0; |
a7086591 | 178 | sqe->fd = f->fd; |
f0403f94 | 179 | sqe->off = offset; |
701d1277 | 180 | sqe->data = (unsigned long) f; |
c9fb4c5b JA |
181 | } |
182 | ||
a7086591 | 183 | static int prep_more_ios(struct submitter *s, int max_ios) |
c9fb4c5b | 184 | { |
e31b8288 | 185 | struct io_sq_ring *ring = &s->sq_ring; |
e2239016 | 186 | unsigned index, tail, next_tail, prepped = 0; |
c9fb4c5b | 187 | |
c3e2fc25 | 188 | next_tail = tail = *ring->tail; |
c9fb4c5b JA |
189 | do { |
190 | next_tail++; | |
c9fb4c5b | 191 | barrier(); |
c3e2fc25 | 192 | if (next_tail == *ring->head) |
c9fb4c5b JA |
193 | break; |
194 | ||
e39c34dc | 195 | index = tail & sq_ring_mask; |
a7086591 | 196 | init_io(s, index); |
c3e2fc25 | 197 | ring->array[index] = index; |
c9fb4c5b JA |
198 | prepped++; |
199 | tail = next_tail; | |
200 | } while (prepped < max_ios); | |
201 | ||
c3e2fc25 | 202 | if (*ring->tail != tail) { |
f0403f94 | 203 | /* order tail store with writes to sqes above */ |
c9fb4c5b | 204 | barrier(); |
c3e2fc25 | 205 | *ring->tail = tail; |
c9fb4c5b JA |
206 | barrier(); |
207 | } | |
208 | return prepped; | |
209 | } | |
210 | ||
a7086591 | 211 | static int get_file_size(struct file *f) |
c9fb4c5b JA |
212 | { |
213 | struct stat st; | |
214 | ||
a7086591 | 215 | if (fstat(f->fd, &st) < 0) |
c9fb4c5b JA |
216 | return -1; |
217 | if (S_ISBLK(st.st_mode)) { | |
218 | unsigned long long bytes; | |
219 | ||
a7086591 | 220 | if (ioctl(f->fd, BLKGETSIZE64, &bytes) != 0) |
c9fb4c5b JA |
221 | return -1; |
222 | ||
a7086591 | 223 | f->max_blocks = bytes / BS; |
c9fb4c5b JA |
224 | return 0; |
225 | } else if (S_ISREG(st.st_mode)) { | |
a7086591 | 226 | f->max_blocks = st.st_size / BS; |
c9fb4c5b JA |
227 | return 0; |
228 | } | |
229 | ||
230 | return -1; | |
231 | } | |
232 | ||
233 | static int reap_events(struct submitter *s) | |
234 | { | |
e31b8288 | 235 | struct io_cq_ring *ring = &s->cq_ring; |
f0403f94 | 236 | struct io_uring_cqe *cqe; |
e2239016 | 237 | unsigned head, reaped = 0; |
c9fb4c5b | 238 | |
c3e2fc25 | 239 | head = *ring->head; |
c9fb4c5b | 240 | do { |
701d1277 JA |
241 | struct file *f; |
242 | ||
c9fb4c5b | 243 | barrier(); |
c3e2fc25 | 244 | if (head == *ring->tail) |
c9fb4c5b | 245 | break; |
f0403f94 | 246 | cqe = &ring->cqes[head & cq_ring_mask]; |
701d1277 JA |
247 | f = (struct file *) cqe->data; |
248 | f->pending_ios--; | |
f0403f94 | 249 | if (cqe->res != BS) { |
f0403f94 | 250 | printf("io: unexpected ret=%d\n", cqe->res); |
c9fb4c5b JA |
251 | return -1; |
252 | } | |
f0403f94 | 253 | if (cqe->flags & IOCQE_FLAG_CACHEHIT) |
305c06ce JA |
254 | s->cachehit++; |
255 | else | |
256 | s->cachemiss++; | |
c9fb4c5b JA |
257 | reaped++; |
258 | head++; | |
c9fb4c5b JA |
259 | } while (1); |
260 | ||
261 | s->inflight -= reaped; | |
c3e2fc25 | 262 | *ring->head = head; |
c9fb4c5b JA |
263 | barrier(); |
264 | return reaped; | |
265 | } | |
266 | ||
267 | static void *submitter_fn(void *data) | |
268 | { | |
269 | struct submitter *s = data; | |
ce1705de | 270 | struct io_sq_ring *ring = &s->sq_ring; |
a7086591 | 271 | int ret, prepped; |
c9fb4c5b JA |
272 | |
273 | printf("submitter=%d\n", gettid()); | |
274 | ||
c9fb4c5b JA |
275 | srand48_r(pthread_self(), &s->rand); |
276 | ||
277 | prepped = 0; | |
278 | do { | |
f310970e | 279 | int to_wait, to_submit, this_reap, to_prep; |
c9fb4c5b | 280 | |
f310970e JA |
281 | if (!prepped && s->inflight < DEPTH) { |
282 | to_prep = min(DEPTH - s->inflight, BATCH_SUBMIT); | |
a7086591 | 283 | prepped = prep_more_ios(s, to_prep); |
f310970e | 284 | } |
c9fb4c5b JA |
285 | s->inflight += prepped; |
286 | submit_more: | |
287 | to_submit = prepped; | |
288 | submit: | |
289 | if (s->inflight + BATCH_SUBMIT < DEPTH) | |
290 | to_wait = 0; | |
291 | else | |
292 | to_wait = min(s->inflight + to_submit, BATCH_COMPLETE); | |
293 | ||
ce1705de JA |
294 | /* |
295 | * Only need to call io_uring_enter if we're not using SQ thread | |
296 | * poll, or if IORING_SQ_NEED_WAKEUP is set. | |
297 | */ | |
298 | if (!sq_thread_poll || (*ring->flags & IORING_SQ_NEED_WAKEUP)) { | |
299 | ret = io_uring_enter(s, to_submit, to_wait, | |
300 | IORING_ENTER_GETEVENTS); | |
301 | s->calls++; | |
302 | } | |
c9fb4c5b | 303 | |
ce1705de JA |
304 | /* |
305 | * For non SQ thread poll, we already got the events we needed | |
306 | * through the io_uring_enter() above. For SQ thread poll, we | |
307 | * need to loop here until we find enough events. | |
308 | */ | |
309 | this_reap = 0; | |
310 | do { | |
311 | int r; | |
312 | r = reap_events(s); | |
313 | if (r == -1) | |
314 | break; | |
315 | else if (r > 0) | |
316 | this_reap += r; | |
317 | } while (sq_thread_poll && this_reap < to_wait); | |
c9fb4c5b JA |
318 | s->reaps += this_reap; |
319 | ||
320 | if (ret >= 0) { | |
321 | if (!ret) { | |
322 | to_submit = 0; | |
323 | if (s->inflight) | |
324 | goto submit; | |
325 | continue; | |
326 | } else if (ret < to_submit) { | |
327 | int diff = to_submit - ret; | |
328 | ||
329 | s->done += ret; | |
330 | prepped -= diff; | |
331 | goto submit_more; | |
332 | } | |
333 | s->done += ret; | |
334 | prepped = 0; | |
335 | continue; | |
336 | } else if (ret < 0) { | |
ac122fea | 337 | if (errno == EAGAIN) { |
c9fb4c5b JA |
338 | if (s->finish) |
339 | break; | |
340 | if (this_reap) | |
341 | goto submit; | |
c9fb4c5b JA |
342 | to_submit = 0; |
343 | goto submit; | |
344 | } | |
ac122fea | 345 | printf("io_submit: %s\n", strerror(errno)); |
c9fb4c5b JA |
346 | break; |
347 | } | |
348 | } while (!s->finish); | |
a7086591 | 349 | |
c9fb4c5b JA |
350 | finish = 1; |
351 | return NULL; | |
352 | } | |
353 | ||
354 | static void sig_int(int sig) | |
355 | { | |
356 | printf("Exiting on signal %d\n", sig); | |
357 | submitters[0].finish = 1; | |
358 | finish = 1; | |
359 | } | |
360 | ||
361 | static void arm_sig_int(void) | |
362 | { | |
363 | struct sigaction act; | |
364 | ||
365 | memset(&act, 0, sizeof(act)); | |
366 | act.sa_handler = sig_int; | |
367 | act.sa_flags = SA_RESTART; | |
368 | sigaction(SIGINT, &act, NULL); | |
369 | } | |
370 | ||
c3e2fc25 JA |
371 | static int setup_ring(struct submitter *s) |
372 | { | |
e31b8288 JA |
373 | struct io_sq_ring *sring = &s->sq_ring; |
374 | struct io_cq_ring *cring = &s->cq_ring; | |
375 | struct io_uring_params p; | |
2ea53ca3 | 376 | int ret, fd; |
c3e2fc25 | 377 | void *ptr; |
c3e2fc25 JA |
378 | |
379 | memset(&p, 0, sizeof(p)); | |
380 | ||
0e47f11b JA |
381 | if (polled) |
382 | p.flags |= IORING_SETUP_IOPOLL; | |
3d7d00a3 | 383 | if (sq_thread_poll) { |
2ea53ca3 | 384 | p.flags |= IORING_SETUP_SQPOLL; |
3d7d00a3 JA |
385 | if (sq_thread_cpu != -1) |
386 | p.flags |= IORING_SETUP_SQ_AFF; | |
c3e2fc25 JA |
387 | } |
388 | ||
2ea53ca3 | 389 | fd = io_uring_setup(DEPTH, &p); |
c3e2fc25 JA |
390 | if (fd < 0) { |
391 | perror("io_uring_setup"); | |
392 | return 1; | |
393 | } | |
f310970e | 394 | s->ring_fd = fd; |
2ea53ca3 JA |
395 | |
396 | if (fixedbufs) { | |
397 | ret = io_uring_register_buffers(s); | |
398 | if (ret < 0) { | |
a7abc9fb | 399 | perror("io_uring_register_buffers"); |
2ea53ca3 JA |
400 | return 1; |
401 | } | |
402 | } | |
403 | ||
a7abc9fb JA |
404 | ret = io_uring_register_files(s); |
405 | if (ret < 0) { | |
406 | perror("io_uring_register_files"); | |
407 | return 1; | |
408 | } | |
409 | ||
e2239016 | 410 | ptr = mmap(0, p.sq_off.array + p.sq_entries * sizeof(__u32), |
f310970e JA |
411 | PROT_READ | PROT_WRITE, MAP_SHARED | MAP_POPULATE, fd, |
412 | IORING_OFF_SQ_RING); | |
c3e2fc25 JA |
413 | printf("sq_ring ptr = 0x%p\n", ptr); |
414 | sring->head = ptr + p.sq_off.head; | |
415 | sring->tail = ptr + p.sq_off.tail; | |
416 | sring->ring_mask = ptr + p.sq_off.ring_mask; | |
417 | sring->ring_entries = ptr + p.sq_off.ring_entries; | |
ce1705de | 418 | sring->flags = ptr + p.sq_off.flags; |
ac122fea | 419 | sring->array = ptr + p.sq_off.array; |
c3e2fc25 JA |
420 | sq_ring_mask = *sring->ring_mask; |
421 | ||
f0403f94 | 422 | s->sqes = mmap(0, p.sq_entries * sizeof(struct io_uring_sqe), |
f310970e | 423 | PROT_READ | PROT_WRITE, MAP_SHARED | MAP_POPULATE, fd, |
f0403f94 JA |
424 | IORING_OFF_SQES); |
425 | printf("sqes ptr = 0x%p\n", s->sqes); | |
c3e2fc25 | 426 | |
f0403f94 | 427 | ptr = mmap(0, p.cq_off.cqes + p.cq_entries * sizeof(struct io_uring_cqe), |
f310970e JA |
428 | PROT_READ | PROT_WRITE, MAP_SHARED | MAP_POPULATE, fd, |
429 | IORING_OFF_CQ_RING); | |
c3e2fc25 JA |
430 | printf("cq_ring ptr = 0x%p\n", ptr); |
431 | cring->head = ptr + p.cq_off.head; | |
432 | cring->tail = ptr + p.cq_off.tail; | |
433 | cring->ring_mask = ptr + p.cq_off.ring_mask; | |
434 | cring->ring_entries = ptr + p.cq_off.ring_entries; | |
f0403f94 | 435 | cring->cqes = ptr + p.cq_off.cqes; |
c3e2fc25 JA |
436 | cq_ring_mask = *cring->ring_mask; |
437 | return 0; | |
438 | } | |
439 | ||
c9fb4c5b JA |
440 | int main(int argc, char *argv[]) |
441 | { | |
442 | struct submitter *s = &submitters[0]; | |
305c06ce | 443 | unsigned long done, calls, reap, cache_hit, cache_miss; |
a7086591 | 444 | int err, i, flags, fd; |
c9fb4c5b | 445 | struct rlimit rlim; |
c3e2fc25 | 446 | void *ret; |
c9fb4c5b JA |
447 | |
448 | if (argc < 2) { | |
449 | printf("%s: filename\n", argv[0]); | |
450 | return 1; | |
451 | } | |
452 | ||
701d1277 | 453 | flags = O_RDONLY | O_NOATIME; |
a7086591 JA |
454 | if (!buffered) |
455 | flags |= O_DIRECT; | |
456 | ||
457 | i = 1; | |
458 | while (i < argc) { | |
459 | struct file *f = &s->files[s->nr_files]; | |
460 | ||
461 | fd = open(argv[i], flags); | |
462 | if (fd < 0) { | |
463 | perror("open"); | |
464 | return 1; | |
465 | } | |
466 | f->fd = fd; | |
467 | if (get_file_size(f)) { | |
468 | printf("failed getting size of device/file\n"); | |
469 | return 1; | |
470 | } | |
471 | if (f->max_blocks <= 1) { | |
472 | printf("Zero file/device size?\n"); | |
473 | return 1; | |
474 | } | |
475 | f->max_blocks--; | |
476 | ||
477 | printf("Added file %s\n", argv[i]); | |
478 | s->nr_files++; | |
479 | i++; | |
480 | } | |
481 | ||
c9fb4c5b JA |
482 | rlim.rlim_cur = RLIM_INFINITY; |
483 | rlim.rlim_max = RLIM_INFINITY; | |
484 | if (setrlimit(RLIMIT_MEMLOCK, &rlim) < 0) { | |
485 | perror("setrlimit"); | |
486 | return 1; | |
487 | } | |
488 | ||
489 | arm_sig_int(); | |
490 | ||
c3e2fc25 JA |
491 | for (i = 0; i < DEPTH; i++) { |
492 | void *buf; | |
c9fb4c5b | 493 | |
c3e2fc25 | 494 | if (posix_memalign(&buf, BS, BS)) { |
c9fb4c5b JA |
495 | printf("failed alloc\n"); |
496 | return 1; | |
497 | } | |
c3e2fc25 JA |
498 | s->iovecs[i].iov_base = buf; |
499 | s->iovecs[i].iov_len = BS; | |
c9fb4c5b JA |
500 | } |
501 | ||
c3e2fc25 | 502 | err = setup_ring(s); |
c9fb4c5b | 503 | if (err) { |
c3e2fc25 | 504 | printf("ring setup failed: %s, %d\n", strerror(errno), err); |
c9fb4c5b JA |
505 | return 1; |
506 | } | |
c3e2fc25 JA |
507 | printf("polled=%d, fixedbufs=%d, buffered=%d", polled, fixedbufs, buffered); |
508 | printf(" QD=%d, sq_ring=%d, cq_ring=%d\n", DEPTH, *s->sq_ring.ring_entries, *s->cq_ring.ring_entries); | |
c9fb4c5b JA |
509 | |
510 | pthread_create(&s->thread, NULL, submitter_fn, s); | |
511 | ||
305c06ce | 512 | cache_hit = cache_miss = reap = calls = done = 0; |
c9fb4c5b JA |
513 | do { |
514 | unsigned long this_done = 0; | |
515 | unsigned long this_reap = 0; | |
516 | unsigned long this_call = 0; | |
305c06ce JA |
517 | unsigned long this_cache_hit = 0; |
518 | unsigned long this_cache_miss = 0; | |
c9fb4c5b | 519 | unsigned long rpc = 0, ipc = 0; |
305c06ce | 520 | double hit = 0.0; |
c9fb4c5b JA |
521 | |
522 | sleep(1); | |
523 | this_done += s->done; | |
524 | this_call += s->calls; | |
525 | this_reap += s->reaps; | |
305c06ce JA |
526 | this_cache_hit += s->cachehit; |
527 | this_cache_miss += s->cachemiss; | |
528 | if (this_cache_hit && this_cache_miss) { | |
529 | unsigned long hits, total; | |
530 | ||
531 | hits = this_cache_hit - cache_hit; | |
532 | total = hits + this_cache_miss - cache_miss; | |
533 | hit = (double) hits / (double) total; | |
534 | hit *= 100.0; | |
535 | } | |
c9fb4c5b JA |
536 | if (this_call - calls) { |
537 | rpc = (this_done - done) / (this_call - calls); | |
538 | ipc = (this_reap - reap) / (this_call - calls); | |
191561c1 JA |
539 | } else |
540 | rpc = ipc = -1; | |
541 | printf("IOPS=%lu, IOS/call=%ld/%ld, inflight=%u (head=%u tail=%u), Cachehit=%0.2f%%\n", | |
c9fb4c5b | 542 | this_done - done, rpc, ipc, s->inflight, |
c3e2fc25 | 543 | *s->cq_ring.head, *s->cq_ring.tail, hit); |
c9fb4c5b JA |
544 | done = this_done; |
545 | calls = this_call; | |
546 | reap = this_reap; | |
305c06ce JA |
547 | cache_hit = s->cachehit; |
548 | cache_miss = s->cachemiss; | |
c9fb4c5b JA |
549 | } while (!finish); |
550 | ||
551 | pthread_join(s->thread, &ret); | |
e31b8288 | 552 | close(s->ring_fd); |
c9fb4c5b JA |
553 | return 0; |
554 | } |