diff options
Diffstat (limited to 'tests/test-throttle.c')
| -rw-r--r-- | tests/test-throttle.c | 599 |
1 files changed, 599 insertions, 0 deletions
diff --git a/tests/test-throttle.c b/tests/test-throttle.c new file mode 100644 index 00000000..01684454 --- /dev/null +++ b/tests/test-throttle.c @@ -0,0 +1,599 @@ +/* + * Throttle infrastructure tests + * + * Copyright Nodalink, EURL. 2013-2014 + * Copyright Igalia, S.L. 2015 + * + * Authors: + * Benoît Canet <benoit.canet@nodalink.com> + * Alberto Garcia <berto@igalia.com> + * + * This work is licensed under the terms of the GNU LGPL, version 2 or later. + * See the COPYING.LIB file in the top-level directory. + */ + +#include <glib.h> +#include <math.h> +#include "block/aio.h" +#include "qemu/throttle.h" +#include "qemu/error-report.h" +#include "block/throttle-groups.h" + +static AioContext *ctx; +static LeakyBucket bkt; +static ThrottleConfig cfg; +static ThrottleState ts; +static ThrottleTimers tt; + +/* useful function */ +static bool double_cmp(double x, double y) +{ + return fabsl(x - y) < 1e-6; +} + +/* tests for single bucket operations */ +static void test_leak_bucket(void) +{ + /* set initial value */ + bkt.avg = 150; + bkt.max = 15; + bkt.level = 1.5; + + /* leak an op work of time */ + throttle_leak_bucket(&bkt, NANOSECONDS_PER_SECOND / 150); + g_assert(bkt.avg == 150); + g_assert(bkt.max == 15); + g_assert(double_cmp(bkt.level, 0.5)); + + /* leak again emptying the bucket */ + throttle_leak_bucket(&bkt, NANOSECONDS_PER_SECOND / 150); + g_assert(bkt.avg == 150); + g_assert(bkt.max == 15); + g_assert(double_cmp(bkt.level, 0)); + + /* check that the bucket level won't go lower */ + throttle_leak_bucket(&bkt, NANOSECONDS_PER_SECOND / 150); + g_assert(bkt.avg == 150); + g_assert(bkt.max == 15); + g_assert(double_cmp(bkt.level, 0)); +} + +static void test_compute_wait(void) +{ + int64_t wait; + int64_t result; + + /* no operation limit set */ + bkt.avg = 0; + bkt.max = 15; + bkt.level = 1.5; + wait = throttle_compute_wait(&bkt); + g_assert(!wait); + + /* zero delta */ + bkt.avg = 150; + bkt.max = 15; + bkt.level = 15; + wait = throttle_compute_wait(&bkt); + g_assert(!wait); + + /* below zero delta */ + bkt.avg = 150; + bkt.max = 15; + bkt.level = 9; + wait = throttle_compute_wait(&bkt); + g_assert(!wait); + + /* half an operation above max */ + bkt.avg = 150; + bkt.max = 15; + bkt.level = 15.5; + wait = throttle_compute_wait(&bkt); + /* time required to do half an operation */ + result = (int64_t) NANOSECONDS_PER_SECOND / 150 / 2; + g_assert(wait == result); +} + +/* functions to test ThrottleState initialization/destroy methods */ +static void read_timer_cb(void *opaque) +{ +} + +static void write_timer_cb(void *opaque) +{ +} + +static void test_init(void) +{ + int i; + + /* fill the structures with crap */ + memset(&ts, 1, sizeof(ts)); + memset(&tt, 1, sizeof(tt)); + + /* init structures */ + throttle_init(&ts); + throttle_timers_init(&tt, ctx, QEMU_CLOCK_VIRTUAL, + read_timer_cb, write_timer_cb, &ts); + + /* check initialized fields */ + g_assert(tt.clock_type == QEMU_CLOCK_VIRTUAL); + g_assert(tt.timers[0]); + g_assert(tt.timers[1]); + + /* check other fields where cleared */ + g_assert(!ts.previous_leak); + g_assert(!ts.cfg.op_size); + for (i = 0; i < BUCKETS_COUNT; i++) { + g_assert(!ts.cfg.buckets[i].avg); + g_assert(!ts.cfg.buckets[i].max); + g_assert(!ts.cfg.buckets[i].level); + } + + throttle_timers_destroy(&tt); +} + +static void test_destroy(void) +{ + int i; + throttle_init(&ts); + throttle_timers_init(&tt, ctx, QEMU_CLOCK_VIRTUAL, + read_timer_cb, write_timer_cb, &ts); + throttle_timers_destroy(&tt); + for (i = 0; i < 2; i++) { + g_assert(!tt.timers[i]); + } +} + +/* function to test throttle_config and throttle_get_config */ +static void test_config_functions(void) +{ + int i; + ThrottleConfig orig_cfg, final_cfg; + + orig_cfg.buckets[THROTTLE_BPS_TOTAL].avg = 153; + orig_cfg.buckets[THROTTLE_BPS_READ].avg = 56; + orig_cfg.buckets[THROTTLE_BPS_WRITE].avg = 1; + + orig_cfg.buckets[THROTTLE_OPS_TOTAL].avg = 150; + orig_cfg.buckets[THROTTLE_OPS_READ].avg = 69; + orig_cfg.buckets[THROTTLE_OPS_WRITE].avg = 23; + + orig_cfg.buckets[THROTTLE_BPS_TOTAL].max = 0; /* should be corrected */ + orig_cfg.buckets[THROTTLE_BPS_READ].max = 1; /* should not be corrected */ + orig_cfg.buckets[THROTTLE_BPS_WRITE].max = 120; + + orig_cfg.buckets[THROTTLE_OPS_TOTAL].max = 150; + orig_cfg.buckets[THROTTLE_OPS_READ].max = 400; + orig_cfg.buckets[THROTTLE_OPS_WRITE].max = 500; + + orig_cfg.buckets[THROTTLE_BPS_TOTAL].level = 45; + orig_cfg.buckets[THROTTLE_BPS_READ].level = 65; + orig_cfg.buckets[THROTTLE_BPS_WRITE].level = 23; + + orig_cfg.buckets[THROTTLE_OPS_TOTAL].level = 1; + orig_cfg.buckets[THROTTLE_OPS_READ].level = 90; + orig_cfg.buckets[THROTTLE_OPS_WRITE].level = 75; + + orig_cfg.op_size = 1; + + throttle_init(&ts); + throttle_timers_init(&tt, ctx, QEMU_CLOCK_VIRTUAL, + read_timer_cb, write_timer_cb, &ts); + /* structure reset by throttle_init previous_leak should be null */ + g_assert(!ts.previous_leak); + throttle_config(&ts, &tt, &orig_cfg); + + /* has previous leak been initialized by throttle_config ? */ + g_assert(ts.previous_leak); + + /* get back the fixed configuration */ + throttle_get_config(&ts, &final_cfg); + + throttle_timers_destroy(&tt); + + g_assert(final_cfg.buckets[THROTTLE_BPS_TOTAL].avg == 153); + g_assert(final_cfg.buckets[THROTTLE_BPS_READ].avg == 56); + g_assert(final_cfg.buckets[THROTTLE_BPS_WRITE].avg == 1); + + g_assert(final_cfg.buckets[THROTTLE_OPS_TOTAL].avg == 150); + g_assert(final_cfg.buckets[THROTTLE_OPS_READ].avg == 69); + g_assert(final_cfg.buckets[THROTTLE_OPS_WRITE].avg == 23); + + g_assert(final_cfg.buckets[THROTTLE_BPS_TOTAL].max == 15.3);/* fixed */ + g_assert(final_cfg.buckets[THROTTLE_BPS_READ].max == 1); /* not fixed */ + g_assert(final_cfg.buckets[THROTTLE_BPS_WRITE].max == 120); + + g_assert(final_cfg.buckets[THROTTLE_OPS_TOTAL].max == 150); + g_assert(final_cfg.buckets[THROTTLE_OPS_READ].max == 400); + g_assert(final_cfg.buckets[THROTTLE_OPS_WRITE].max == 500); + + g_assert(final_cfg.op_size == 1); + + /* check bucket have been cleared */ + for (i = 0; i < BUCKETS_COUNT; i++) { + g_assert(!final_cfg.buckets[i].level); + } +} + +/* functions to test is throttle is enabled by a config */ +static void set_cfg_value(bool is_max, int index, int value) +{ + if (is_max) { + cfg.buckets[index].max = value; + } else { + cfg.buckets[index].avg = value; + } +} + +static void test_enabled(void) +{ + int i; + + memset(&cfg, 0, sizeof(cfg)); + g_assert(!throttle_enabled(&cfg)); + + for (i = 0; i < BUCKETS_COUNT; i++) { + memset(&cfg, 0, sizeof(cfg)); + set_cfg_value(false, i, 150); + g_assert(throttle_enabled(&cfg)); + } + + for (i = 0; i < BUCKETS_COUNT; i++) { + memset(&cfg, 0, sizeof(cfg)); + set_cfg_value(false, i, -150); + g_assert(!throttle_enabled(&cfg)); + } +} + +/* tests functions for throttle_conflicting */ + +static void test_conflicts_for_one_set(bool is_max, + int total, + int read, + int write) +{ + memset(&cfg, 0, sizeof(cfg)); + g_assert(!throttle_conflicting(&cfg)); + + set_cfg_value(is_max, total, 1); + set_cfg_value(is_max, read, 1); + g_assert(throttle_conflicting(&cfg)); + + memset(&cfg, 0, sizeof(cfg)); + set_cfg_value(is_max, total, 1); + set_cfg_value(is_max, write, 1); + g_assert(throttle_conflicting(&cfg)); + + memset(&cfg, 0, sizeof(cfg)); + set_cfg_value(is_max, total, 1); + set_cfg_value(is_max, read, 1); + set_cfg_value(is_max, write, 1); + g_assert(throttle_conflicting(&cfg)); + + memset(&cfg, 0, sizeof(cfg)); + set_cfg_value(is_max, total, 1); + g_assert(!throttle_conflicting(&cfg)); + + memset(&cfg, 0, sizeof(cfg)); + set_cfg_value(is_max, read, 1); + set_cfg_value(is_max, write, 1); + g_assert(!throttle_conflicting(&cfg)); +} + +static void test_conflicting_config(void) +{ + /* bps average conflicts */ + test_conflicts_for_one_set(false, + THROTTLE_BPS_TOTAL, + THROTTLE_BPS_READ, + THROTTLE_BPS_WRITE); + + /* ops average conflicts */ + test_conflicts_for_one_set(false, + THROTTLE_OPS_TOTAL, + THROTTLE_OPS_READ, + THROTTLE_OPS_WRITE); + + /* bps average conflicts */ + test_conflicts_for_one_set(true, + THROTTLE_BPS_TOTAL, + THROTTLE_BPS_READ, + THROTTLE_BPS_WRITE); + /* ops average conflicts */ + test_conflicts_for_one_set(true, + THROTTLE_OPS_TOTAL, + THROTTLE_OPS_READ, + THROTTLE_OPS_WRITE); +} +/* functions to test the throttle_is_valid function */ +static void test_is_valid_for_value(int value, bool should_be_valid) +{ + int is_max, index; + for (is_max = 0; is_max < 2; is_max++) { + for (index = 0; index < BUCKETS_COUNT; index++) { + memset(&cfg, 0, sizeof(cfg)); + set_cfg_value(is_max, index, value); + g_assert(throttle_is_valid(&cfg) == should_be_valid); + } + } +} + +static void test_is_valid(void) +{ + /* negative number are invalid */ + test_is_valid_for_value(-1, false); + /* zero are valids */ + test_is_valid_for_value(0, true); + /* positives numers are valids */ + test_is_valid_for_value(1, true); +} + +static void test_have_timer(void) +{ + /* zero structures */ + memset(&ts, 0, sizeof(ts)); + memset(&tt, 0, sizeof(tt)); + + /* no timer set should return false */ + g_assert(!throttle_timers_are_initialized(&tt)); + + /* init structures */ + throttle_init(&ts); + throttle_timers_init(&tt, ctx, QEMU_CLOCK_VIRTUAL, + read_timer_cb, write_timer_cb, &ts); + + /* timer set by init should return true */ + g_assert(throttle_timers_are_initialized(&tt)); + + throttle_timers_destroy(&tt); +} + +static void test_detach_attach(void) +{ + /* zero structures */ + memset(&ts, 0, sizeof(ts)); + memset(&tt, 0, sizeof(tt)); + + /* init the structure */ + throttle_init(&ts); + throttle_timers_init(&tt, ctx, QEMU_CLOCK_VIRTUAL, + read_timer_cb, write_timer_cb, &ts); + + /* timer set by init should return true */ + g_assert(throttle_timers_are_initialized(&tt)); + + /* timer should no longer exist after detaching */ + throttle_timers_detach_aio_context(&tt); + g_assert(!throttle_timers_are_initialized(&tt)); + + /* timer should exist again after attaching */ + throttle_timers_attach_aio_context(&tt, ctx); + g_assert(throttle_timers_are_initialized(&tt)); + + throttle_timers_destroy(&tt); +} + +static bool do_test_accounting(bool is_ops, /* are we testing bps or ops */ + int size, /* size of the operation to do */ + double avg, /* io limit */ + uint64_t op_size, /* ideal size of an io */ + double total_result, + double read_result, + double write_result) +{ + BucketType to_test[2][3] = { { THROTTLE_BPS_TOTAL, + THROTTLE_BPS_READ, + THROTTLE_BPS_WRITE, }, + { THROTTLE_OPS_TOTAL, + THROTTLE_OPS_READ, + THROTTLE_OPS_WRITE, } }; + ThrottleConfig cfg; + BucketType index; + int i; + + for (i = 0; i < 3; i++) { + BucketType index = to_test[is_ops][i]; + cfg.buckets[index].avg = avg; + } + + cfg.op_size = op_size; + + throttle_init(&ts); + throttle_timers_init(&tt, ctx, QEMU_CLOCK_VIRTUAL, + read_timer_cb, write_timer_cb, &ts); + throttle_config(&ts, &tt, &cfg); + + /* account a read */ + throttle_account(&ts, false, size); + /* account a write */ + throttle_account(&ts, true, size); + + /* check total result */ + index = to_test[is_ops][0]; + if (!double_cmp(ts.cfg.buckets[index].level, total_result)) { + return false; + } + + /* check read result */ + index = to_test[is_ops][1]; + if (!double_cmp(ts.cfg.buckets[index].level, read_result)) { + return false; + } + + /* check write result */ + index = to_test[is_ops][2]; + if (!double_cmp(ts.cfg.buckets[index].level, write_result)) { + return false; + } + + throttle_timers_destroy(&tt); + + return true; +} + +static void test_accounting(void) +{ + /* tests for bps */ + + /* op of size 1 */ + g_assert(do_test_accounting(false, + 1 * 512, + 150, + 0, + 1024, + 512, + 512)); + + /* op of size 2 */ + g_assert(do_test_accounting(false, + 2 * 512, + 150, + 0, + 2048, + 1024, + 1024)); + + /* op of size 2 and orthogonal parameter change */ + g_assert(do_test_accounting(false, + 2 * 512, + 150, + 17, + 2048, + 1024, + 1024)); + + + /* tests for ops */ + + /* op of size 1 */ + g_assert(do_test_accounting(true, + 1 * 512, + 150, + 0, + 2, + 1, + 1)); + + /* op of size 2 */ + g_assert(do_test_accounting(true, + 2 * 512, + 150, + 0, + 2, + 1, + 1)); + + /* jumbo op accounting fragmentation : size 64 with op size of 13 units */ + g_assert(do_test_accounting(true, + 64 * 512, + 150, + 13 * 512, + (64.0 * 2) / 13, + (64.0 / 13), + (64.0 / 13))); + + /* same with orthogonal parameters changes */ + g_assert(do_test_accounting(true, + 64 * 512, + 300, + 13 * 512, + (64.0 * 2) / 13, + (64.0 / 13), + (64.0 / 13))); +} + +static void test_groups(void) +{ + ThrottleConfig cfg1, cfg2; + BlockDriverState *bdrv1, *bdrv2, *bdrv3; + + bdrv1 = bdrv_new(); + bdrv2 = bdrv_new(); + bdrv3 = bdrv_new(); + + g_assert(bdrv1->throttle_state == NULL); + g_assert(bdrv2->throttle_state == NULL); + g_assert(bdrv3->throttle_state == NULL); + + throttle_group_register_bs(bdrv1, "bar"); + throttle_group_register_bs(bdrv2, "foo"); + throttle_group_register_bs(bdrv3, "bar"); + + g_assert(bdrv1->throttle_state != NULL); + g_assert(bdrv2->throttle_state != NULL); + g_assert(bdrv3->throttle_state != NULL); + + g_assert(!strcmp(throttle_group_get_name(bdrv1), "bar")); + g_assert(!strcmp(throttle_group_get_name(bdrv2), "foo")); + g_assert(bdrv1->throttle_state == bdrv3->throttle_state); + + /* Setting the config of a group member affects the whole group */ + memset(&cfg1, 0, sizeof(cfg1)); + cfg1.buckets[THROTTLE_BPS_READ].avg = 500000; + cfg1.buckets[THROTTLE_BPS_WRITE].avg = 285000; + cfg1.buckets[THROTTLE_OPS_READ].avg = 20000; + cfg1.buckets[THROTTLE_OPS_WRITE].avg = 12000; + throttle_group_config(bdrv1, &cfg1); + + throttle_group_get_config(bdrv1, &cfg1); + throttle_group_get_config(bdrv3, &cfg2); + g_assert(!memcmp(&cfg1, &cfg2, sizeof(cfg1))); + + cfg2.buckets[THROTTLE_BPS_READ].avg = 4547; + cfg2.buckets[THROTTLE_BPS_WRITE].avg = 1349; + cfg2.buckets[THROTTLE_OPS_READ].avg = 123; + cfg2.buckets[THROTTLE_OPS_WRITE].avg = 86; + throttle_group_config(bdrv3, &cfg1); + + throttle_group_get_config(bdrv1, &cfg1); + throttle_group_get_config(bdrv3, &cfg2); + g_assert(!memcmp(&cfg1, &cfg2, sizeof(cfg1))); + + throttle_group_unregister_bs(bdrv1); + throttle_group_unregister_bs(bdrv2); + throttle_group_unregister_bs(bdrv3); + + g_assert(bdrv1->throttle_state == NULL); + g_assert(bdrv2->throttle_state == NULL); + g_assert(bdrv3->throttle_state == NULL); +} + +int main(int argc, char **argv) +{ + Error *local_error = NULL; + + qemu_init_main_loop(&local_error); + ctx = qemu_get_aio_context(); + + if (!ctx) { + error_report("Failed to create AIO Context: '%s'", + local_error ? error_get_pretty(local_error) : + "Failed to initialize the QEMU main loop"); + if (local_error) { + error_free(local_error); + } + exit(1); + } + + bdrv_init(); + + do {} while (g_main_context_iteration(NULL, false)); + + /* tests in the same order as the header function declarations */ + g_test_init(&argc, &argv, NULL); + g_test_add_func("/throttle/leak_bucket", test_leak_bucket); + g_test_add_func("/throttle/compute_wait", test_compute_wait); + g_test_add_func("/throttle/init", test_init); + g_test_add_func("/throttle/destroy", test_destroy); + g_test_add_func("/throttle/have_timer", test_have_timer); + g_test_add_func("/throttle/detach_attach", test_detach_attach); + g_test_add_func("/throttle/config/enabled", test_enabled); + g_test_add_func("/throttle/config/conflicting", test_conflicting_config); + g_test_add_func("/throttle/config/is_valid", test_is_valid); + g_test_add_func("/throttle/config_functions", test_config_functions); + g_test_add_func("/throttle/accounting", test_accounting); + g_test_add_func("/throttle/groups", test_groups); + return g_test_run(); +} + |