From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- tools/testing/radix-tree/multiorder.c | 296 ++++++++++++++++++++++++++++++++++ 1 file changed, 296 insertions(+) create mode 100644 tools/testing/radix-tree/multiorder.c (limited to 'tools/testing/radix-tree/multiorder.c') diff --git a/tools/testing/radix-tree/multiorder.c b/tools/testing/radix-tree/multiorder.c new file mode 100644 index 0000000000..cffaf2245d --- /dev/null +++ b/tools/testing/radix-tree/multiorder.c @@ -0,0 +1,296 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * multiorder.c: Multi-order radix tree entry testing + * Copyright (c) 2016 Intel Corporation + * Author: Ross Zwisler + * Author: Matthew Wilcox + */ +#include +#include +#include +#include + +#include "test.h" + +static int item_insert_order(struct xarray *xa, unsigned long index, + unsigned order) +{ + XA_STATE_ORDER(xas, xa, index, order); + struct item *item = item_create(index, order); + + do { + xas_lock(&xas); + xas_store(&xas, item); + xas_unlock(&xas); + } while (xas_nomem(&xas, GFP_KERNEL)); + + if (!xas_error(&xas)) + return 0; + + free(item); + return xas_error(&xas); +} + +void multiorder_iteration(struct xarray *xa) +{ + XA_STATE(xas, xa, 0); + struct item *item; + int i, j, err; + +#define NUM_ENTRIES 11 + int index[NUM_ENTRIES] = {0, 2, 4, 8, 16, 32, 34, 36, 64, 72, 128}; + int order[NUM_ENTRIES] = {1, 1, 2, 3, 4, 1, 0, 1, 3, 0, 7}; + + printv(1, "Multiorder iteration test\n"); + + for (i = 0; i < NUM_ENTRIES; i++) { + err = item_insert_order(xa, index[i], order[i]); + assert(!err); + } + + for (j = 0; j < 256; j++) { + for (i = 0; i < NUM_ENTRIES; i++) + if (j <= (index[i] | ((1 << order[i]) - 1))) + break; + + xas_set(&xas, j); + xas_for_each(&xas, item, ULONG_MAX) { + int height = order[i] / XA_CHUNK_SHIFT; + int shift = height * XA_CHUNK_SHIFT; + unsigned long mask = (1UL << order[i]) - 1; + + assert((xas.xa_index | mask) == (index[i] | mask)); + assert(xas.xa_node->shift == shift); + assert(!radix_tree_is_internal_node(item)); + assert((item->index | mask) == (index[i] | mask)); + assert(item->order == order[i]); + i++; + } + } + + item_kill_tree(xa); +} + +void multiorder_tagged_iteration(struct xarray *xa) +{ + XA_STATE(xas, xa, 0); + struct item *item; + int i, j; + +#define MT_NUM_ENTRIES 9 + int index[MT_NUM_ENTRIES] = {0, 2, 4, 16, 32, 40, 64, 72, 128}; + int order[MT_NUM_ENTRIES] = {1, 0, 2, 4, 3, 1, 3, 0, 7}; + +#define TAG_ENTRIES 7 + int tag_index[TAG_ENTRIES] = {0, 4, 16, 40, 64, 72, 128}; + + printv(1, "Multiorder tagged iteration test\n"); + + for (i = 0; i < MT_NUM_ENTRIES; i++) + assert(!item_insert_order(xa, index[i], order[i])); + + assert(!xa_marked(xa, XA_MARK_1)); + + for (i = 0; i < TAG_ENTRIES; i++) + xa_set_mark(xa, tag_index[i], XA_MARK_1); + + for (j = 0; j < 256; j++) { + int k; + + for (i = 0; i < TAG_ENTRIES; i++) { + for (k = i; index[k] < tag_index[i]; k++) + ; + if (j <= (index[k] | ((1 << order[k]) - 1))) + break; + } + + xas_set(&xas, j); + xas_for_each_marked(&xas, item, ULONG_MAX, XA_MARK_1) { + unsigned long mask; + for (k = i; index[k] < tag_index[i]; k++) + ; + mask = (1UL << order[k]) - 1; + + assert((xas.xa_index | mask) == (tag_index[i] | mask)); + assert(!xa_is_internal(item)); + assert((item->index | mask) == (tag_index[i] | mask)); + assert(item->order == order[k]); + i++; + } + } + + assert(tag_tagged_items(xa, 0, ULONG_MAX, TAG_ENTRIES, XA_MARK_1, + XA_MARK_2) == TAG_ENTRIES); + + for (j = 0; j < 256; j++) { + int mask, k; + + for (i = 0; i < TAG_ENTRIES; i++) { + for (k = i; index[k] < tag_index[i]; k++) + ; + if (j <= (index[k] | ((1 << order[k]) - 1))) + break; + } + + xas_set(&xas, j); + xas_for_each_marked(&xas, item, ULONG_MAX, XA_MARK_2) { + for (k = i; index[k] < tag_index[i]; k++) + ; + mask = (1 << order[k]) - 1; + + assert((xas.xa_index | mask) == (tag_index[i] | mask)); + assert(!xa_is_internal(item)); + assert((item->index | mask) == (tag_index[i] | mask)); + assert(item->order == order[k]); + i++; + } + } + + assert(tag_tagged_items(xa, 1, ULONG_MAX, MT_NUM_ENTRIES * 2, XA_MARK_1, + XA_MARK_0) == TAG_ENTRIES); + i = 0; + xas_set(&xas, 0); + xas_for_each_marked(&xas, item, ULONG_MAX, XA_MARK_0) { + assert(xas.xa_index == tag_index[i]); + i++; + } + assert(i == TAG_ENTRIES); + + item_kill_tree(xa); +} + +bool stop_iteration; + +static void *creator_func(void *ptr) +{ + /* 'order' is set up to ensure we have sibling entries */ + unsigned int order = RADIX_TREE_MAP_SHIFT - 1; + struct radix_tree_root *tree = ptr; + int i; + + for (i = 0; i < 10000; i++) { + item_insert_order(tree, 0, order); + item_delete_rcu(tree, 0); + } + + stop_iteration = true; + return NULL; +} + +static void *iterator_func(void *ptr) +{ + XA_STATE(xas, ptr, 0); + struct item *item; + + while (!stop_iteration) { + rcu_read_lock(); + xas_for_each(&xas, item, ULONG_MAX) { + if (xas_retry(&xas, item)) + continue; + + item_sanity(item, xas.xa_index); + } + rcu_read_unlock(); + } + return NULL; +} + +static void multiorder_iteration_race(struct xarray *xa) +{ + const int num_threads = sysconf(_SC_NPROCESSORS_ONLN); + pthread_t worker_thread[num_threads]; + int i; + + stop_iteration = false; + pthread_create(&worker_thread[0], NULL, &creator_func, xa); + for (i = 1; i < num_threads; i++) + pthread_create(&worker_thread[i], NULL, &iterator_func, xa); + + for (i = 0; i < num_threads; i++) + pthread_join(worker_thread[i], NULL); + + item_kill_tree(xa); +} + +static void *load_creator(void *ptr) +{ + /* 'order' is set up to ensure we have sibling entries */ + unsigned int order; + struct radix_tree_root *tree = ptr; + int i; + + rcu_register_thread(); + item_insert_order(tree, 3 << RADIX_TREE_MAP_SHIFT, 0); + item_insert_order(tree, 2 << RADIX_TREE_MAP_SHIFT, 0); + for (i = 0; i < 10000; i++) { + for (order = 1; order < RADIX_TREE_MAP_SHIFT; order++) { + unsigned long index = (3 << RADIX_TREE_MAP_SHIFT) - + (1 << order); + item_insert_order(tree, index, order); + item_delete_rcu(tree, index); + } + } + rcu_unregister_thread(); + + stop_iteration = true; + return NULL; +} + +static void *load_worker(void *ptr) +{ + unsigned long index = (3 << RADIX_TREE_MAP_SHIFT) - 1; + + rcu_register_thread(); + while (!stop_iteration) { + struct item *item = xa_load(ptr, index); + assert(!xa_is_internal(item)); + } + rcu_unregister_thread(); + + return NULL; +} + +static void load_race(struct xarray *xa) +{ + const int num_threads = sysconf(_SC_NPROCESSORS_ONLN) * 4; + pthread_t worker_thread[num_threads]; + int i; + + stop_iteration = false; + pthread_create(&worker_thread[0], NULL, &load_creator, xa); + for (i = 1; i < num_threads; i++) + pthread_create(&worker_thread[i], NULL, &load_worker, xa); + + for (i = 0; i < num_threads; i++) + pthread_join(worker_thread[i], NULL); + + item_kill_tree(xa); +} + +static DEFINE_XARRAY(array); + +void multiorder_checks(void) +{ + multiorder_iteration(&array); + multiorder_tagged_iteration(&array); + multiorder_iteration_race(&array); + load_race(&array); + + radix_tree_cpu_dead(0); +} + +int __weak main(int argc, char **argv) +{ + int opt; + + while ((opt = getopt(argc, argv, "ls:v")) != -1) { + if (opt == 'v') + test_verbose++; + } + + rcu_register_thread(); + radix_tree_init(); + multiorder_checks(); + rcu_unregister_thread(); + return 0; +} -- cgit v1.2.3