| 1 | |
| 2 | #include <linux/kernel.h>
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| 3 | #include <linux/gfp.h>
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| 4 | #include <linux/slab.h>
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| 5 | #include <linux/radix-tree.h>
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| 6 | #include <linux/rcupdate.h>
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| 7 | #include <stdlib.h>
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| 8 | #include <pthread.h>
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| 9 | #include <stdio.h>
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| 10 | #include <assert.h>
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| 11 |
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| 12 | #include "regression.h"
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| 13 |
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| 14 | static pthread_barrier_t worker_barrier;
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| 15 | static int obj0, obj1;
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| 16 | static RADIX_TREE(mt_tree, GFP_KERNEL);
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| 17 |
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| 18 | static void *reader_fn(void *arg)
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| 19 | {
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| 20 | int i;
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| 21 | void *entry;
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| 22 |
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| 23 | rcu_register_thread();
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| 24 | pthread_barrier_wait(&worker_barrier);
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| 25 |
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| 26 | for (i = 0; i < 1000000; i++) {
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| 27 | rcu_read_lock();
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| 28 | entry = radix_tree_lookup(&mt_tree, 0);
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| 29 | rcu_read_unlock();
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| 30 | if (entry != &obj0) {
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| 31 | printf("iteration %d bad entry = %p\n", i, entry);
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| 32 | abort();
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| 33 | }
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| 34 | }
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| 35 |
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| 36 | rcu_unregister_thread();
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| 37 |
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| 38 | return NULL;
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| 39 | }
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| 40 |
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| 41 | static void *writer_fn(void *arg)
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| 42 | {
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| 43 | int i;
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| 44 |
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| 45 | rcu_register_thread();
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| 46 | pthread_barrier_wait(&worker_barrier);
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| 47 |
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| 48 | for (i = 0; i < 1000000; i++) {
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| 49 | radix_tree_insert(&mt_tree, 1, &obj1);
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| 50 | radix_tree_delete(&mt_tree, 1);
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| 51 | }
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| 52 |
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| 53 | rcu_unregister_thread();
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| 54 |
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| 55 | return NULL;
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| 56 | }
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| 57 |
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| 58 | void regression4_test(void)
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| 59 | {
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| 60 | pthread_t reader, writer;
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| 61 |
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| 62 | printv(1, "regression test 4 starting\n");
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| 63 |
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| 64 | radix_tree_insert(&mt_tree, 0, &obj0);
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| 65 | pthread_barrier_init(&worker_barrier, NULL, 2);
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| 66 |
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| 67 | if (pthread_create(&reader, NULL, reader_fn, NULL) ||
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| 68 | pthread_create(&writer, NULL, writer_fn, NULL)) {
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| 69 | perror("pthread_create");
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| 70 | exit(1);
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| 71 | }
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| 72 |
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| 73 | if (pthread_join(reader, NULL) || pthread_join(writer, NULL)) {
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| 74 | perror("pthread_join");
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| 75 | exit(1);
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| 76 | }
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| 77 |
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| 78 | printv(1, "regression test 4 passed\n");
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| 79 | }
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