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Diffstat (limited to 'qemu/tests/test-hbitmap.c')
-rw-r--r-- | qemu/tests/test-hbitmap.c | 694 |
1 files changed, 694 insertions, 0 deletions
diff --git a/qemu/tests/test-hbitmap.c b/qemu/tests/test-hbitmap.c new file mode 100644 index 000000000..161eeb496 --- /dev/null +++ b/qemu/tests/test-hbitmap.c @@ -0,0 +1,694 @@ +/* + * Hierarchical bitmap unit-tests. + * + * Copyright (C) 2012 Red Hat Inc. + * + * Author: Paolo Bonzini <pbonzini@redhat.com> + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + */ + +#include <glib.h> +#include <stdarg.h> +#include <string.h> +#include <sys/types.h> +#include "qemu/hbitmap.h" + +#define LOG_BITS_PER_LONG (BITS_PER_LONG == 32 ? 5 : 6) + +#define L1 BITS_PER_LONG +#define L2 (BITS_PER_LONG * L1) +#define L3 (BITS_PER_LONG * L2) + +typedef struct TestHBitmapData { + HBitmap *hb; + unsigned long *bits; + size_t size; + size_t old_size; + int granularity; +} TestHBitmapData; + + +/* Check that the HBitmap and the shadow bitmap contain the same data, + * ignoring the same "first" bits. + */ +static void hbitmap_test_check(TestHBitmapData *data, + uint64_t first) +{ + uint64_t count = 0; + size_t pos; + int bit; + HBitmapIter hbi; + int64_t i, next; + + hbitmap_iter_init(&hbi, data->hb, first); + + i = first; + for (;;) { + next = hbitmap_iter_next(&hbi); + if (next < 0) { + next = data->size; + } + + while (i < next) { + pos = i >> LOG_BITS_PER_LONG; + bit = i & (BITS_PER_LONG - 1); + i++; + g_assert_cmpint(data->bits[pos] & (1UL << bit), ==, 0); + } + + if (next == data->size) { + break; + } + + pos = i >> LOG_BITS_PER_LONG; + bit = i & (BITS_PER_LONG - 1); + i++; + count++; + g_assert_cmpint(data->bits[pos] & (1UL << bit), !=, 0); + } + + if (first == 0) { + g_assert_cmpint(count << data->granularity, ==, hbitmap_count(data->hb)); + } +} + +/* This is provided instead of a test setup function so that the sizes + are kept in the test functions (and not in main()) */ +static void hbitmap_test_init(TestHBitmapData *data, + uint64_t size, int granularity) +{ + size_t n; + data->hb = hbitmap_alloc(size, granularity); + + n = (size + BITS_PER_LONG - 1) / BITS_PER_LONG; + if (n == 0) { + n = 1; + } + data->bits = g_new0(unsigned long, n); + data->size = size; + data->granularity = granularity; + if (size) { + hbitmap_test_check(data, 0); + } +} + +static inline size_t hbitmap_test_array_size(size_t bits) +{ + size_t n = (bits + BITS_PER_LONG - 1) / BITS_PER_LONG; + return n ? n : 1; +} + +static void hbitmap_test_truncate_impl(TestHBitmapData *data, + size_t size) +{ + size_t n; + size_t m; + data->old_size = data->size; + data->size = size; + + if (data->size == data->old_size) { + return; + } + + n = hbitmap_test_array_size(size); + m = hbitmap_test_array_size(data->old_size); + data->bits = g_realloc(data->bits, sizeof(unsigned long) * n); + if (n > m) { + memset(&data->bits[m], 0x00, sizeof(unsigned long) * (n - m)); + } + + /* If we shrink to an uneven multiple of sizeof(unsigned long), + * scrub the leftover memory. */ + if (data->size < data->old_size) { + m = size % (sizeof(unsigned long) * 8); + if (m) { + unsigned long mask = (1ULL << m) - 1; + data->bits[n-1] &= mask; + } + } + + hbitmap_truncate(data->hb, size); +} + +static void hbitmap_test_teardown(TestHBitmapData *data, + const void *unused) +{ + if (data->hb) { + hbitmap_free(data->hb); + data->hb = NULL; + } + if (data->bits) { + g_free(data->bits); + data->bits = NULL; + } +} + +/* Set a range in the HBitmap and in the shadow "simple" bitmap. + * The two bitmaps are then tested against each other. + */ +static void hbitmap_test_set(TestHBitmapData *data, + uint64_t first, uint64_t count) +{ + hbitmap_set(data->hb, first, count); + while (count-- != 0) { + size_t pos = first >> LOG_BITS_PER_LONG; + int bit = first & (BITS_PER_LONG - 1); + first++; + + data->bits[pos] |= 1UL << bit; + } + + if (data->granularity == 0) { + hbitmap_test_check(data, 0); + } +} + +/* Reset a range in the HBitmap and in the shadow "simple" bitmap. + */ +static void hbitmap_test_reset(TestHBitmapData *data, + uint64_t first, uint64_t count) +{ + hbitmap_reset(data->hb, first, count); + while (count-- != 0) { + size_t pos = first >> LOG_BITS_PER_LONG; + int bit = first & (BITS_PER_LONG - 1); + first++; + + data->bits[pos] &= ~(1UL << bit); + } + + if (data->granularity == 0) { + hbitmap_test_check(data, 0); + } +} + +static void hbitmap_test_reset_all(TestHBitmapData *data) +{ + size_t n; + + hbitmap_reset_all(data->hb); + + n = (data->size + BITS_PER_LONG - 1) / BITS_PER_LONG; + if (n == 0) { + n = 1; + } + memset(data->bits, 0, n * sizeof(unsigned long)); + + if (data->granularity == 0) { + hbitmap_test_check(data, 0); + } +} + +static void hbitmap_test_check_get(TestHBitmapData *data) +{ + uint64_t count = 0; + uint64_t i; + + for (i = 0; i < data->size; i++) { + size_t pos = i >> LOG_BITS_PER_LONG; + int bit = i & (BITS_PER_LONG - 1); + unsigned long val = data->bits[pos] & (1UL << bit); + count += hbitmap_get(data->hb, i); + g_assert_cmpint(hbitmap_get(data->hb, i), ==, val != 0); + } + g_assert_cmpint(count, ==, hbitmap_count(data->hb)); +} + +static void test_hbitmap_zero(TestHBitmapData *data, + const void *unused) +{ + hbitmap_test_init(data, 0, 0); +} + +static void test_hbitmap_unaligned(TestHBitmapData *data, + const void *unused) +{ + hbitmap_test_init(data, L3 + 23, 0); + hbitmap_test_set(data, 0, 1); + hbitmap_test_set(data, L3 + 22, 1); +} + +static void test_hbitmap_iter_empty(TestHBitmapData *data, + const void *unused) +{ + hbitmap_test_init(data, L1, 0); +} + +static void test_hbitmap_iter_partial(TestHBitmapData *data, + const void *unused) +{ + hbitmap_test_init(data, L3, 0); + hbitmap_test_set(data, 0, L3); + hbitmap_test_check(data, 1); + hbitmap_test_check(data, L1 - 1); + hbitmap_test_check(data, L1); + hbitmap_test_check(data, L1 * 2 - 1); + hbitmap_test_check(data, L2 - 1); + hbitmap_test_check(data, L2); + hbitmap_test_check(data, L2 + 1); + hbitmap_test_check(data, L2 + L1); + hbitmap_test_check(data, L2 + L1 * 2 - 1); + hbitmap_test_check(data, L2 * 2 - 1); + hbitmap_test_check(data, L2 * 2); + hbitmap_test_check(data, L2 * 2 + 1); + hbitmap_test_check(data, L2 * 2 + L1); + hbitmap_test_check(data, L2 * 2 + L1 * 2 - 1); + hbitmap_test_check(data, L3 / 2); +} + +static void test_hbitmap_set_all(TestHBitmapData *data, + const void *unused) +{ + hbitmap_test_init(data, L3, 0); + hbitmap_test_set(data, 0, L3); +} + +static void test_hbitmap_get_all(TestHBitmapData *data, + const void *unused) +{ + hbitmap_test_init(data, L3, 0); + hbitmap_test_set(data, 0, L3); + hbitmap_test_check_get(data); +} + +static void test_hbitmap_get_some(TestHBitmapData *data, + const void *unused) +{ + hbitmap_test_init(data, 2 * L2, 0); + hbitmap_test_set(data, 10, 1); + hbitmap_test_check_get(data); + hbitmap_test_set(data, L1 - 1, 1); + hbitmap_test_check_get(data); + hbitmap_test_set(data, L1, 1); + hbitmap_test_check_get(data); + hbitmap_test_set(data, L2 - 1, 1); + hbitmap_test_check_get(data); + hbitmap_test_set(data, L2, 1); + hbitmap_test_check_get(data); +} + +static void test_hbitmap_set_one(TestHBitmapData *data, + const void *unused) +{ + hbitmap_test_init(data, 2 * L2, 0); + hbitmap_test_set(data, 10, 1); + hbitmap_test_set(data, L1 - 1, 1); + hbitmap_test_set(data, L1, 1); + hbitmap_test_set(data, L2 - 1, 1); + hbitmap_test_set(data, L2, 1); +} + +static void test_hbitmap_set_two_elem(TestHBitmapData *data, + const void *unused) +{ + hbitmap_test_init(data, 2 * L2, 0); + hbitmap_test_set(data, L1 - 1, 2); + hbitmap_test_set(data, L1 * 2 - 1, 4); + hbitmap_test_set(data, L1 * 4, L1 + 1); + hbitmap_test_set(data, L1 * 8 - 1, L1 + 1); + hbitmap_test_set(data, L2 - 1, 2); + hbitmap_test_set(data, L2 + L1 - 1, 8); + hbitmap_test_set(data, L2 + L1 * 4, L1 + 1); + hbitmap_test_set(data, L2 + L1 * 8 - 1, L1 + 1); +} + +static void test_hbitmap_set(TestHBitmapData *data, + const void *unused) +{ + hbitmap_test_init(data, L3 * 2, 0); + hbitmap_test_set(data, L1 - 1, L1 + 2); + hbitmap_test_set(data, L1 * 3 - 1, L1 + 2); + hbitmap_test_set(data, L1 * 5, L1 * 2 + 1); + hbitmap_test_set(data, L1 * 8 - 1, L1 * 2 + 1); + hbitmap_test_set(data, L2 - 1, L1 + 2); + hbitmap_test_set(data, L2 + L1 * 2 - 1, L1 + 2); + hbitmap_test_set(data, L2 + L1 * 4, L1 * 2 + 1); + hbitmap_test_set(data, L2 + L1 * 7 - 1, L1 * 2 + 1); + hbitmap_test_set(data, L2 * 2 - 1, L3 * 2 - L2 * 2); +} + +static void test_hbitmap_set_twice(TestHBitmapData *data, + const void *unused) +{ + hbitmap_test_init(data, L1 * 3, 0); + hbitmap_test_set(data, 0, L1 * 3); + hbitmap_test_set(data, L1, 1); +} + +static void test_hbitmap_set_overlap(TestHBitmapData *data, + const void *unused) +{ + hbitmap_test_init(data, L3 * 2, 0); + hbitmap_test_set(data, L1 - 1, L1 + 2); + hbitmap_test_set(data, L1 * 2 - 1, L1 * 2 + 2); + hbitmap_test_set(data, 0, L1 * 3); + hbitmap_test_set(data, L1 * 8 - 1, L2); + hbitmap_test_set(data, L2, L1); + hbitmap_test_set(data, L2 - L1 - 1, L1 * 8 + 2); + hbitmap_test_set(data, L2, L3 - L2 + 1); + hbitmap_test_set(data, L3 - L1, L1 * 3); + hbitmap_test_set(data, L3 - 1, 3); + hbitmap_test_set(data, L3 - 1, L2); +} + +static void test_hbitmap_reset_empty(TestHBitmapData *data, + const void *unused) +{ + hbitmap_test_init(data, L3, 0); + hbitmap_test_reset(data, 0, L3); +} + +static void test_hbitmap_reset(TestHBitmapData *data, + const void *unused) +{ + hbitmap_test_init(data, L3 * 2, 0); + hbitmap_test_set(data, L1 - 1, L1 + 2); + hbitmap_test_reset(data, L1 * 2 - 1, L1 * 2 + 2); + hbitmap_test_set(data, 0, L1 * 3); + hbitmap_test_reset(data, L1 * 8 - 1, L2); + hbitmap_test_set(data, L2, L1); + hbitmap_test_reset(data, L2 - L1 - 1, L1 * 8 + 2); + hbitmap_test_set(data, L2, L3 - L2 + 1); + hbitmap_test_reset(data, L3 - L1, L1 * 3); + hbitmap_test_set(data, L3 - 1, 3); + hbitmap_test_reset(data, L3 - 1, L2); + hbitmap_test_set(data, 0, L3 * 2); + hbitmap_test_reset(data, 0, L1); + hbitmap_test_reset(data, 0, L2); + hbitmap_test_reset(data, L3, L3); + hbitmap_test_set(data, L3 / 2, L3); +} + +static void test_hbitmap_reset_all(TestHBitmapData *data, + const void *unused) +{ + hbitmap_test_init(data, L3 * 2, 0); + hbitmap_test_set(data, L1 - 1, L1 + 2); + hbitmap_test_reset_all(data); + hbitmap_test_set(data, 0, L1 * 3); + hbitmap_test_reset_all(data); + hbitmap_test_set(data, L2, L1); + hbitmap_test_reset_all(data); + hbitmap_test_set(data, L2, L3 - L2 + 1); + hbitmap_test_reset_all(data); + hbitmap_test_set(data, L3 - 1, 3); + hbitmap_test_reset_all(data); + hbitmap_test_set(data, 0, L3 * 2); + hbitmap_test_reset_all(data); + hbitmap_test_set(data, L3 / 2, L3); + hbitmap_test_reset_all(data); +} + +static void test_hbitmap_granularity(TestHBitmapData *data, + const void *unused) +{ + /* Note that hbitmap_test_check has to be invoked manually in this test. */ + hbitmap_test_init(data, L1, 1); + hbitmap_test_set(data, 0, 1); + g_assert_cmpint(hbitmap_count(data->hb), ==, 2); + hbitmap_test_check(data, 0); + hbitmap_test_set(data, 2, 1); + g_assert_cmpint(hbitmap_count(data->hb), ==, 4); + hbitmap_test_check(data, 0); + hbitmap_test_set(data, 0, 3); + g_assert_cmpint(hbitmap_count(data->hb), ==, 4); + hbitmap_test_reset(data, 0, 1); + g_assert_cmpint(hbitmap_count(data->hb), ==, 2); +} + +static void test_hbitmap_iter_granularity(TestHBitmapData *data, + const void *unused) +{ + HBitmapIter hbi; + + /* Note that hbitmap_test_check has to be invoked manually in this test. */ + hbitmap_test_init(data, 131072 << 7, 7); + hbitmap_iter_init(&hbi, data->hb, 0); + g_assert_cmpint(hbitmap_iter_next(&hbi), <, 0); + + hbitmap_test_set(data, ((L2 + L1 + 1) << 7) + 8, 8); + hbitmap_iter_init(&hbi, data->hb, 0); + g_assert_cmpint(hbitmap_iter_next(&hbi), ==, (L2 + L1 + 1) << 7); + g_assert_cmpint(hbitmap_iter_next(&hbi), <, 0); + + hbitmap_iter_init(&hbi, data->hb, (L2 + L1 + 2) << 7); + g_assert_cmpint(hbitmap_iter_next(&hbi), <, 0); + + hbitmap_test_set(data, (131072 << 7) - 8, 8); + hbitmap_iter_init(&hbi, data->hb, 0); + g_assert_cmpint(hbitmap_iter_next(&hbi), ==, (L2 + L1 + 1) << 7); + g_assert_cmpint(hbitmap_iter_next(&hbi), ==, 131071 << 7); + g_assert_cmpint(hbitmap_iter_next(&hbi), <, 0); + + hbitmap_iter_init(&hbi, data->hb, (L2 + L1 + 2) << 7); + g_assert_cmpint(hbitmap_iter_next(&hbi), ==, 131071 << 7); + g_assert_cmpint(hbitmap_iter_next(&hbi), <, 0); +} + +static void hbitmap_test_set_boundary_bits(TestHBitmapData *data, ssize_t diff) +{ + size_t size = data->size; + + /* First bit */ + hbitmap_test_set(data, 0, 1); + if (diff < 0) { + /* Last bit in new, shortened map */ + hbitmap_test_set(data, size + diff - 1, 1); + + /* First bit to be truncated away */ + hbitmap_test_set(data, size + diff, 1); + } + /* Last bit */ + hbitmap_test_set(data, size - 1, 1); + if (data->granularity == 0) { + hbitmap_test_check_get(data); + } +} + +static void hbitmap_test_check_boundary_bits(TestHBitmapData *data) +{ + size_t size = MIN(data->size, data->old_size); + + if (data->granularity == 0) { + hbitmap_test_check_get(data); + hbitmap_test_check(data, 0); + } else { + /* If a granularity was set, note that every distinct + * (bit >> granularity) value that was set will increase + * the bit pop count by 2^granularity, not just 1. + * + * The hbitmap_test_check facility does not currently tolerate + * non-zero granularities, so test the boundaries and the population + * count manually. + */ + g_assert(hbitmap_get(data->hb, 0)); + g_assert(hbitmap_get(data->hb, size - 1)); + g_assert_cmpint(2 << data->granularity, ==, hbitmap_count(data->hb)); + } +} + +/* Generic truncate test. */ +static void hbitmap_test_truncate(TestHBitmapData *data, + size_t size, + ssize_t diff, + int granularity) +{ + hbitmap_test_init(data, size, granularity); + hbitmap_test_set_boundary_bits(data, diff); + hbitmap_test_truncate_impl(data, size + diff); + hbitmap_test_check_boundary_bits(data); +} + +static void test_hbitmap_truncate_nop(TestHBitmapData *data, + const void *unused) +{ + hbitmap_test_truncate(data, L2, 0, 0); +} + +/** + * Grow by an amount smaller than the granularity, without crossing + * a granularity alignment boundary. Effectively a NOP. + */ +static void test_hbitmap_truncate_grow_negligible(TestHBitmapData *data, + const void *unused) +{ + size_t size = L2 - 1; + size_t diff = 1; + int granularity = 1; + + hbitmap_test_truncate(data, size, diff, granularity); +} + +/** + * Shrink by an amount smaller than the granularity, without crossing + * a granularity alignment boundary. Effectively a NOP. + */ +static void test_hbitmap_truncate_shrink_negligible(TestHBitmapData *data, + const void *unused) +{ + size_t size = L2; + ssize_t diff = -1; + int granularity = 1; + + hbitmap_test_truncate(data, size, diff, granularity); +} + +/** + * Grow by an amount smaller than the granularity, but crossing over + * a granularity alignment boundary. + */ +static void test_hbitmap_truncate_grow_tiny(TestHBitmapData *data, + const void *unused) +{ + size_t size = L2 - 2; + ssize_t diff = 1; + int granularity = 1; + + hbitmap_test_truncate(data, size, diff, granularity); +} + +/** + * Shrink by an amount smaller than the granularity, but crossing over + * a granularity alignment boundary. + */ +static void test_hbitmap_truncate_shrink_tiny(TestHBitmapData *data, + const void *unused) +{ + size_t size = L2 - 1; + ssize_t diff = -1; + int granularity = 1; + + hbitmap_test_truncate(data, size, diff, granularity); +} + +/** + * Grow by an amount smaller than sizeof(long), and not crossing over + * a sizeof(long) alignment boundary. + */ +static void test_hbitmap_truncate_grow_small(TestHBitmapData *data, + const void *unused) +{ + size_t size = L2 + 1; + size_t diff = sizeof(long) / 2; + + hbitmap_test_truncate(data, size, diff, 0); +} + +/** + * Shrink by an amount smaller than sizeof(long), and not crossing over + * a sizeof(long) alignment boundary. + */ +static void test_hbitmap_truncate_shrink_small(TestHBitmapData *data, + const void *unused) +{ + size_t size = L2; + size_t diff = sizeof(long) / 2; + + hbitmap_test_truncate(data, size, -diff, 0); +} + +/** + * Grow by an amount smaller than sizeof(long), while crossing over + * a sizeof(long) alignment boundary. + */ +static void test_hbitmap_truncate_grow_medium(TestHBitmapData *data, + const void *unused) +{ + size_t size = L2 - 1; + size_t diff = sizeof(long) / 2; + + hbitmap_test_truncate(data, size, diff, 0); +} + +/** + * Shrink by an amount smaller than sizeof(long), while crossing over + * a sizeof(long) alignment boundary. + */ +static void test_hbitmap_truncate_shrink_medium(TestHBitmapData *data, + const void *unused) +{ + size_t size = L2 + 1; + size_t diff = sizeof(long) / 2; + + hbitmap_test_truncate(data, size, -diff, 0); +} + +/** + * Grow by an amount larger than sizeof(long). + */ +static void test_hbitmap_truncate_grow_large(TestHBitmapData *data, + const void *unused) +{ + size_t size = L2; + size_t diff = 8 * sizeof(long); + + hbitmap_test_truncate(data, size, diff, 0); +} + +/** + * Shrink by an amount larger than sizeof(long). + */ +static void test_hbitmap_truncate_shrink_large(TestHBitmapData *data, + const void *unused) +{ + size_t size = L2; + size_t diff = 8 * sizeof(long); + + hbitmap_test_truncate(data, size, -diff, 0); +} + +static void hbitmap_test_add(const char *testpath, + void (*test_func)(TestHBitmapData *data, const void *user_data)) +{ + g_test_add(testpath, TestHBitmapData, NULL, NULL, test_func, + hbitmap_test_teardown); +} + +int main(int argc, char **argv) +{ + g_test_init(&argc, &argv, NULL); + hbitmap_test_add("/hbitmap/size/0", test_hbitmap_zero); + hbitmap_test_add("/hbitmap/size/unaligned", test_hbitmap_unaligned); + hbitmap_test_add("/hbitmap/iter/empty", test_hbitmap_iter_empty); + hbitmap_test_add("/hbitmap/iter/partial", test_hbitmap_iter_partial); + hbitmap_test_add("/hbitmap/iter/granularity", test_hbitmap_iter_granularity); + hbitmap_test_add("/hbitmap/get/all", test_hbitmap_get_all); + hbitmap_test_add("/hbitmap/get/some", test_hbitmap_get_some); + hbitmap_test_add("/hbitmap/set/all", test_hbitmap_set_all); + hbitmap_test_add("/hbitmap/set/one", test_hbitmap_set_one); + hbitmap_test_add("/hbitmap/set/two-elem", test_hbitmap_set_two_elem); + hbitmap_test_add("/hbitmap/set/general", test_hbitmap_set); + hbitmap_test_add("/hbitmap/set/twice", test_hbitmap_set_twice); + hbitmap_test_add("/hbitmap/set/overlap", test_hbitmap_set_overlap); + hbitmap_test_add("/hbitmap/reset/empty", test_hbitmap_reset_empty); + hbitmap_test_add("/hbitmap/reset/general", test_hbitmap_reset); + hbitmap_test_add("/hbitmap/reset/all", test_hbitmap_reset_all); + hbitmap_test_add("/hbitmap/granularity", test_hbitmap_granularity); + + hbitmap_test_add("/hbitmap/truncate/nop", test_hbitmap_truncate_nop); + hbitmap_test_add("/hbitmap/truncate/grow/negligible", + test_hbitmap_truncate_grow_negligible); + hbitmap_test_add("/hbitmap/truncate/shrink/negligible", + test_hbitmap_truncate_shrink_negligible); + hbitmap_test_add("/hbitmap/truncate/grow/tiny", + test_hbitmap_truncate_grow_tiny); + hbitmap_test_add("/hbitmap/truncate/shrink/tiny", + test_hbitmap_truncate_shrink_tiny); + hbitmap_test_add("/hbitmap/truncate/grow/small", + test_hbitmap_truncate_grow_small); + hbitmap_test_add("/hbitmap/truncate/shrink/small", + test_hbitmap_truncate_shrink_small); + hbitmap_test_add("/hbitmap/truncate/grow/medium", + test_hbitmap_truncate_grow_medium); + hbitmap_test_add("/hbitmap/truncate/shrink/medium", + test_hbitmap_truncate_shrink_medium); + hbitmap_test_add("/hbitmap/truncate/grow/large", + test_hbitmap_truncate_grow_large); + hbitmap_test_add("/hbitmap/truncate/shrink/large", + test_hbitmap_truncate_shrink_large); + g_test_run(); + + return 0; +} |