| 1 | /* |
| 2 | * guasi engine |
| 3 | * |
| 4 | * IO engine using the GUASI library. |
| 5 | * |
| 6 | * This is currently disabled, add -lguasi to the fio Makefile target |
| 7 | * and add a #define FIO_HAVE_GUASI to os-linux.h to enable it. You'll |
| 8 | * need the GUASI lib as well: |
| 9 | * |
| 10 | * http://www.xmailserver.org/guasi-lib.html |
| 11 | * |
| 12 | */ |
| 13 | #include <stdio.h> |
| 14 | #include <stdlib.h> |
| 15 | #include <unistd.h> |
| 16 | #include <errno.h> |
| 17 | #include <assert.h> |
| 18 | |
| 19 | #include "../fio.h" |
| 20 | #include "../os.h" |
| 21 | |
| 22 | #ifdef FIO_HAVE_GUASI |
| 23 | |
| 24 | #define GFIO_MIN_THREADS 32 |
| 25 | |
| 26 | #include <guasi.h> |
| 27 | #include <guasi_syscalls.h> |
| 28 | |
| 29 | #ifdef GFIO_DEBUG |
| 30 | #define GDBG_PRINT(a) printf a |
| 31 | #else |
| 32 | #define GDBG_PRINT(a) (void) 0 |
| 33 | #endif |
| 34 | |
| 35 | #define STFU_GCC(a) a = a |
| 36 | |
| 37 | |
| 38 | struct guasi_data { |
| 39 | guasi_t hctx; |
| 40 | int max_reqs; |
| 41 | guasi_req_t *reqs; |
| 42 | struct io_u **io_us; |
| 43 | int reqs_nr; |
| 44 | }; |
| 45 | |
| 46 | static int fio_guasi_prep(struct thread_data fio_unused *td, struct io_u *io_u) |
| 47 | { |
| 48 | STFU_GCC(io_u); |
| 49 | |
| 50 | GDBG_PRINT(("fio_guasi_prep(%p)\n", io_u)); |
| 51 | |
| 52 | return 0; |
| 53 | } |
| 54 | |
| 55 | static struct io_u *fio_guasi_event(struct thread_data *td, int event) |
| 56 | { |
| 57 | struct guasi_data *ld = td->io_ops->data; |
| 58 | struct io_u *io_u; |
| 59 | struct guasi_reqinfo rinf; |
| 60 | |
| 61 | GDBG_PRINT(("fio_guasi_event(%d)\n", event)); |
| 62 | if (guasi_req_info(ld->reqs[event], &rinf) < 0) { |
| 63 | fprintf(stderr, "guasi_req_info(%d) FAILED!\n", event); |
| 64 | return NULL; |
| 65 | } |
| 66 | io_u = rinf.asid; |
| 67 | io_u->error = EINPROGRESS; |
| 68 | GDBG_PRINT(("fio_guasi_event(%d) -> %p\n", event, io_u)); |
| 69 | if (rinf.status == GUASI_STATUS_COMPLETE) { |
| 70 | io_u->error = rinf.result; |
| 71 | if (io_u->ddir == DDIR_READ || |
| 72 | io_u->ddir == DDIR_WRITE) { |
| 73 | io_u->error = 0; |
| 74 | if (rinf.result != (long) io_u->xfer_buflen) { |
| 75 | if (rinf.result >= 0) |
| 76 | io_u->resid = io_u->xfer_buflen - rinf.result; |
| 77 | else |
| 78 | io_u->error = rinf.error; |
| 79 | } |
| 80 | } |
| 81 | } |
| 82 | |
| 83 | return io_u; |
| 84 | } |
| 85 | |
| 86 | static int fio_guasi_getevents(struct thread_data *td, int min, int max, |
| 87 | struct timespec *t) |
| 88 | { |
| 89 | struct guasi_data *ld = td->io_ops->data; |
| 90 | int n = 0, r; |
| 91 | long timeo = -1; |
| 92 | |
| 93 | GDBG_PRINT(("fio_guasi_getevents(%d, %d)\n", min, max)); |
| 94 | if (min > ld->max_reqs) |
| 95 | min = ld->max_reqs; |
| 96 | if (max > ld->max_reqs) |
| 97 | max = ld->max_reqs; |
| 98 | if (t) |
| 99 | timeo = t->tv_sec * 1000L + t->tv_nsec / 1000000L; |
| 100 | do { |
| 101 | r = guasi_fetch(ld->hctx, ld->reqs + n, max - n, timeo); |
| 102 | if (r < 0) |
| 103 | break; |
| 104 | n += r; |
| 105 | if (n >= min) |
| 106 | break; |
| 107 | } while (1); |
| 108 | GDBG_PRINT(("fio_guasi_getevents() -> %d\n", n)); |
| 109 | |
| 110 | return n; |
| 111 | } |
| 112 | |
| 113 | static int fio_guasi_queue(struct thread_data *td, struct io_u *io_u) |
| 114 | { |
| 115 | struct guasi_data *ld = td->io_ops->data; |
| 116 | |
| 117 | GDBG_PRINT(("fio_guasi_queue(%p)\n", io_u)); |
| 118 | if (ld->reqs_nr == (int) td->iodepth) |
| 119 | return FIO_Q_BUSY; |
| 120 | |
| 121 | ld->io_us[ld->reqs_nr] = io_u; |
| 122 | ld->reqs_nr++; |
| 123 | return FIO_Q_QUEUED; |
| 124 | } |
| 125 | |
| 126 | static void fio_guasi_queued(struct thread_data *td, struct io_u **io_us, |
| 127 | unsigned int nr) |
| 128 | { |
| 129 | struct timeval now; |
| 130 | struct io_u *io_u = io_us[nr]; |
| 131 | |
| 132 | fio_gettime(&now, NULL); |
| 133 | memcpy(&io_u->issue_time, &now, sizeof(now)); |
| 134 | io_u_queued(td, io_u); |
| 135 | } |
| 136 | |
| 137 | static int fio_guasi_commit(struct thread_data *td) |
| 138 | { |
| 139 | struct guasi_data *ld = td->io_ops->data; |
| 140 | int i; |
| 141 | struct io_u *io_u; |
| 142 | struct fio_file *f; |
| 143 | |
| 144 | GDBG_PRINT(("fio_guasi_commit()\n")); |
| 145 | for (i = 0; i < ld->reqs_nr; i++) { |
| 146 | io_u = ld->io_us[i]; |
| 147 | f = io_u->file; |
| 148 | io_u->greq = NULL; |
| 149 | if (io_u->ddir == DDIR_READ) |
| 150 | io_u->greq = guasi__pread(ld->hctx, ld, io_u, 0, |
| 151 | f->fd, io_u->xfer_buf, io_u->xfer_buflen, |
| 152 | io_u->offset); |
| 153 | else if (io_u->ddir == DDIR_WRITE) |
| 154 | io_u->greq = guasi__pwrite(ld->hctx, ld, io_u, 0, |
| 155 | f->fd, io_u->xfer_buf, io_u->xfer_buflen, |
| 156 | io_u->offset); |
| 157 | else if (io_u->ddir == DDIR_SYNC) |
| 158 | io_u->greq = guasi__fsync(ld->hctx, ld, io_u, 0, f->fd); |
| 159 | else { |
| 160 | fprintf(stderr, "fio_guasi_commit() FAILED: unknow request %d\n", |
| 161 | io_u->ddir); |
| 162 | } |
| 163 | if (io_u->greq != NULL) |
| 164 | fio_guasi_queued(td, ld->io_us, i); |
| 165 | } |
| 166 | ld->reqs_nr = 0; |
| 167 | GDBG_PRINT(("fio_guasi_commit() -> %d\n", i)); |
| 168 | |
| 169 | return 0; |
| 170 | } |
| 171 | |
| 172 | static int fio_guasi_cancel(struct thread_data *td, struct io_u *io_u) |
| 173 | { |
| 174 | struct guasi_data *ld = td->io_ops->data; |
| 175 | |
| 176 | STFU_GCC(ld); |
| 177 | GDBG_PRINT(("fio_guasi_cancel(%p)\n", io_u)); |
| 178 | |
| 179 | return guasi_req_cancel(io_u->greq); |
| 180 | } |
| 181 | |
| 182 | static void fio_guasi_cleanup(struct thread_data *td) |
| 183 | { |
| 184 | struct guasi_data *ld = td->io_ops->data; |
| 185 | |
| 186 | if (ld) { |
| 187 | guasi_free(ld->hctx); |
| 188 | free(ld->reqs); |
| 189 | free(ld->io_us); |
| 190 | free(ld); |
| 191 | td->io_ops->data = NULL; |
| 192 | } |
| 193 | } |
| 194 | |
| 195 | static int fio_guasi_init(struct thread_data *td) |
| 196 | { |
| 197 | int maxthr; |
| 198 | struct guasi_data *ld = malloc(sizeof(*ld)); |
| 199 | |
| 200 | GDBG_PRINT(("fio_guasi_init(): depth=%d\n", td->iodepth)); |
| 201 | memset(ld, 0, sizeof(*ld)); |
| 202 | maxthr = td->iodepth > GFIO_MIN_THREADS ? td->iodepth: GFIO_MIN_THREADS; |
| 203 | if ((ld->hctx = guasi_create(GFIO_MIN_THREADS, maxthr, 1)) == NULL) { |
| 204 | td_verror(td, errno, "guasi_create"); |
| 205 | free(ld); |
| 206 | return 1; |
| 207 | } |
| 208 | ld->max_reqs = td->iodepth; |
| 209 | ld->reqs = malloc(ld->max_reqs * sizeof(guasi_req_t)); |
| 210 | ld->io_us = malloc(ld->max_reqs * sizeof(struct io_u *)); |
| 211 | memset(ld->io_us, 0, ld->max_reqs * sizeof(struct io_u *)); |
| 212 | ld->reqs_nr = 0; |
| 213 | |
| 214 | td->io_ops->data = ld; |
| 215 | GDBG_PRINT(("fio_guasi_init(): depth=%d -> %p\n", td->iodepth, ld)); |
| 216 | |
| 217 | return 0; |
| 218 | } |
| 219 | |
| 220 | static struct ioengine_ops ioengine = { |
| 221 | .name = "guasi", |
| 222 | .version = FIO_IOOPS_VERSION, |
| 223 | .init = fio_guasi_init, |
| 224 | .prep = fio_guasi_prep, |
| 225 | .queue = fio_guasi_queue, |
| 226 | .commit = fio_guasi_commit, |
| 227 | .cancel = fio_guasi_cancel, |
| 228 | .getevents = fio_guasi_getevents, |
| 229 | .event = fio_guasi_event, |
| 230 | .cleanup = fio_guasi_cleanup, |
| 231 | .open_file = generic_open_file, |
| 232 | .close_file = generic_close_file, |
| 233 | }; |
| 234 | |
| 235 | #else /* FIO_HAVE_GUASI */ |
| 236 | |
| 237 | /* |
| 238 | * When we have a proper configure system in place, we simply wont build |
| 239 | * and install this io engine. For now install a crippled version that |
| 240 | * just complains and fails to load. |
| 241 | */ |
| 242 | static int fio_guasi_init(struct thread_data fio_unused *td) |
| 243 | { |
| 244 | fprintf(stderr, "fio: guasi not available\n"); |
| 245 | return 1; |
| 246 | } |
| 247 | |
| 248 | static struct ioengine_ops ioengine = { |
| 249 | .name = "guasi", |
| 250 | .version = FIO_IOOPS_VERSION, |
| 251 | .init = fio_guasi_init, |
| 252 | }; |
| 253 | |
| 254 | #endif |
| 255 | |
| 256 | static void fio_init fio_guasi_register(void) |
| 257 | { |
| 258 | register_ioengine(&ioengine); |
| 259 | } |
| 260 | |
| 261 | static void fio_exit fio_guasi_unregister(void) |
| 262 | { |
| 263 | unregister_ioengine(&ioengine); |
| 264 | } |
| 265 | |