[176] | 1 | /* |
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| 2 | * swift_context.c |
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| 3 | * |
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| 4 | * (c) 2009 Ionut Rosoiu <ionut.rosoiu@gmail.com> |
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| 5 | * |
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| 6 | */ |
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| 7 | |
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| 8 | #include <stdio.h> |
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| 9 | #include <stdlib.h> |
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| 10 | #include "swift.h" |
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| 11 | |
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| 12 | int N; |
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| 13 | |
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| 14 | typedef struct fibo_data { |
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| 15 | int n; |
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| 16 | int *r; |
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| 17 | // sync related |
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| 18 | swift_size_t sync_frames_remaining; |
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| 19 | char _pad[SWIFT_CACHE_LINE_SIZE - sizeof(swift_size_t)]; |
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| 20 | } fibo_data_t; |
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| 21 | |
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| 22 | /* forward declaration for the fibo() */ |
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| 23 | void fibo(swift_thread_t *thread, swift_frame_t *frame); |
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| 24 | |
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| 25 | |
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| 26 | /* void fibo(int r, shared_w int* r) */ |
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| 27 | void fibo(swift_thread_t *thread, swift_frame_t *frame) { |
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| 28 | fibo_data_t *data = frame->private_data; |
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| 29 | swift_status_t status; |
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| 30 | swift_size_t n; |
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| 31 | |
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| 32 | SWIFT_LOG_FRAME_INFO_STR("\nfibo() ", thread, frame); |
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| 33 | |
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| 34 | if (data->n < 2) { |
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| 35 | *data->r = data->n; |
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| 36 | data->sync_frames_remaining = 0; |
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| 37 | |
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| 38 | } else { |
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| 39 | // fibo(n-1) data |
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| 40 | swift_frame_t frame1; |
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| 41 | fibo_data_t data1; |
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| 42 | |
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| 43 | // fibo(n-2) data |
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| 44 | swift_frame_t frame2; |
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| 45 | fibo_data_t data2; |
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| 46 | |
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| 47 | int r1, r2; |
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| 48 | |
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| 49 | /* spawn fibo(n-1, r1); */ |
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| 50 | frame1.closure = fibo; |
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| 51 | frame1.flags = 0; |
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| 52 | #ifdef LOGGING_ON |
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| 53 | frame1.creator_id = thread->id; |
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| 54 | frame1.dbg = data->n - 1; |
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| 55 | #endif |
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| 56 | data1.n = data->n - 1; |
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| 57 | data1.r = &r1; |
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| 58 | frame1.private_data = &data1; |
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| 59 | |
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| 60 | SWIFT_WRITE_FRAME_INFO((&frame1), thread->id, 'f', thread->frame_no++); |
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| 61 | // sync related |
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| 62 | frame1.dependencies_frame = NULL; |
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| 63 | frame1.sync_frames_remaining = &data->sync_frames_remaining; |
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| 64 | |
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| 65 | /* spawn fibo(n-2, r2); */ |
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| 66 | frame2.closure = fibo; |
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| 67 | frame2.flags = 0; |
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| 68 | #ifdef LOGGING_ON |
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| 69 | frame2.creator_id = thread->id; |
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| 70 | frame2.dbg = data->n - 2; |
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| 71 | #endif |
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| 72 | |
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| 73 | data2.n = data->n - 2; |
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| 74 | data2.r = &r2; |
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| 75 | frame2.private_data = &data2; |
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| 76 | |
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| 77 | SWIFT_WRITE_FRAME_INFO((&frame2), thread->id, 'f', thread->frame_no++); |
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| 78 | frame2.dependencies_frame = NULL; |
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| 79 | frame2.sync_frames_remaining = &data->sync_frames_remaining; |
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| 80 | |
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| 81 | // wait for 1,2 to finish |
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| 82 | data->sync_frames_remaining = 2; |
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| 83 | |
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| 84 | // add 1 & 2 in the workque |
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| 85 | swift_deque_push(&thread->workque, &frame1, &status); |
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| 86 | swift_deque_push(&thread->workque, &frame2, &status); |
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| 87 | |
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| 88 | while ((n = SWIFT_ATOMIC_READ(data->sync_frames_remaining))) { |
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| 89 | SWIFT_LOG(INFO, "[%d] %s rem=%d c=%d f=%c.%d (%d)\n", thread->id, "@sync", n, |
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| 90 | SWIFT_PROC(frame->info), SWIFT_FRAME_NAME(frame->info), |
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| 91 | frame->dbg, SWIFT_FRAME_ID(frame->info)); |
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| 92 | swift_scheduler_execute(thread); |
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| 93 | } |
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| 94 | |
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| 95 | *data->r = r1 + r2; |
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| 96 | } |
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| 97 | |
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| 98 | SWIFT_LOG(INFO, "[%d] __fibo(%d)=%d\n", thread->id, data->n, *data->r); |
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| 99 | |
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| 100 | if (SWIFT_FRAME_IS_END_PARALLEL(frame)) { |
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| 101 | SWIFT_LOG(INFO, "[%d] END_PARALLEL!!!\n", thread->id); |
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| 102 | thread->stop = 1; |
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| 103 | } |
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| 104 | |
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| 105 | swift_signal_frame_done(thread, frame); |
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| 106 | swift_frame_done(thread->context, thread, frame); |
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| 107 | } |
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| 108 | |
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| 109 | void* thread_start(void *arg) { |
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| 110 | swift_thread_t *thread = arg; |
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| 111 | int i = 0; |
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| 112 | |
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| 113 | SWIFT_LOG(INFO, "_____started thread %d\n", thread->id); |
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| 114 | |
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| 115 | //while (i++ <= N) { |
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| 116 | //swift_scheduler_execute(thread, &status); |
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| 117 | //} |
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| 118 | |
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| 119 | while(!thread->stop) { |
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| 120 | swift_scheduler_execute(thread); |
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| 121 | } |
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| 122 | |
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| 123 | // inform all other threads that they must stop |
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| 124 | for (i=0; i<thread->context->thread_num; i++) { |
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| 125 | thread->context->threads[i].stop = 1; |
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| 126 | } |
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| 127 | |
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| 128 | |
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| 129 | SWIFT_LOG(INFO, "_____finished thread %d: %d frames processed\n", thread->id, thread->stats); |
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| 130 | printf("_____finished thread %d: %d frames processed\n", thread->id, thread->stats); |
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| 131 | |
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| 132 | return arg; |
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| 133 | } |
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| 134 | |
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| 135 | int main(int argc, char **argv) { |
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| 136 | swift_context_t context; |
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| 137 | swift_frame_t *frame; |
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| 138 | swift_status_t status; |
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| 139 | fibo_data_t *data; |
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| 140 | int i, r; |
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| 141 | int nthreads, n; |
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| 142 | |
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| 143 | if (argc != 3) { |
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| 144 | fprintf(stderr, "usage: %s Nthreads N\n", argv[0]); |
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| 145 | abort(); |
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| 146 | } |
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| 147 | |
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| 148 | nthreads = strtol(argv[1], NULL, 10); |
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| 149 | n = strtol(argv[2], NULL, 10); |
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| 150 | N = n; |
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| 151 | |
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| 152 | SWIFT_LOG(INFO, "Started nthreads=%d n=%d\n", nthreads, n); |
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| 153 | |
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| 154 | /* initialize the context */ |
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| 155 | swift_context_init(&context, nthreads); |
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| 156 | |
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| 157 | /* push the first frame */ |
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| 158 | frame = (swift_frame_t*) swift_malloc(&context.threads[0], sizeof(swift_frame_t) + sizeof(fibo_data_t)); |
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| 159 | SWIFT_FRAME_SET_END_PARALLEL(frame); |
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| 160 | frame->closure = fibo; |
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| 161 | #ifdef LOGGING_ON |
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| 162 | frame->dbg = n; |
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| 163 | frame->creator_id = 0; |
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| 164 | #endif |
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| 165 | |
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| 166 | data = (fibo_data_t*) ((char*)frame + sizeof(swift_frame_t)); |
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| 167 | data->n = n; |
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| 168 | data->r = &r; |
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| 169 | frame->private_data = data; |
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| 170 | |
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| 171 | SWIFT_WRITE_FRAME_INFO(frame, 0, 'f', context.threads[0].frame_no++); |
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| 172 | SWIFT_LOG_FRAME_INFO((&context.threads[0]), frame); |
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| 173 | |
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| 174 | // no wait frame |
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| 175 | frame->dependencies_no = 0; |
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| 176 | frame->dependencies_frame = NULL; |
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| 177 | frame->sync_frames_remaining = &data->sync_frames_remaining; // doesn't matter |
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| 178 | |
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| 179 | swift_deque_push(&context.threads[0].workque, frame, &status); |
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| 180 | SWIFT_LOG(INFO, "pushed first frame\n"); |
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| 181 | |
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| 182 | |
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| 183 | /* start the threads */ |
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| 184 | for (i=0; i<nthreads; i++) { |
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| 185 | swift_thread_start(&context.threads[i], thread_start); |
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| 186 | } |
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| 187 | |
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| 188 | /* wait for the threads to finish */ |
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| 189 | for (i=0; i<nthreads; i++) { |
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| 190 | SWIFT_LOG(INFO, "_____waiting %d\n", i); |
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| 191 | swift_thread_wait(&context.threads[i]); |
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| 192 | SWIFT_LOG(INFO, "_____waiting %d done\n", i); |
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| 193 | } |
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| 194 | |
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| 195 | /* check the result */ |
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| 196 | printf("computed result for fibo(%d)=%d\n", n, r); |
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| 197 | swift_context_destroy(&context); |
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| 198 | |
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| 199 | return 0; |
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| 200 | } |
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