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RFC v4: * Add atomicity test for atomic bit flip. RFC v3: * Rename variable 'main' to make ICC happy. Signed-off-by: Mattias Rönnblom Acked-by: Morten Brørup Acked-by: Tyler Retzlaff --- app/test/test_bitops.c | 315 ++++++++++++++++++++++++++++++++++++++++- 1 file changed, 314 insertions(+), 1 deletion(-) diff --git a/app/test/test_bitops.c b/app/test/test_bitops.c index 9bffc4da14..c86d7e1f77 100644 --- a/app/test/test_bitops.c +++ b/app/test/test_bitops.c @@ -3,10 +3,13 @@ * Copyright(c) 2024 Ericsson AB */ +#include #include -#include #include +#include +#include +#include #include #include "test.h" @@ -69,6 +72,304 @@ GEN_TEST_BIT_ACCESS(test_bit_once_access64, rte_bit_once_set, rte_bit_once_clear, rte_bit_once_assign, rte_bit_once_flip, rte_bit_once_test, 64) +#define bit_atomic_set(addr, nr) \ + rte_bit_atomic_set(addr, nr, rte_memory_order_relaxed) + +#define bit_atomic_clear(addr, nr) \ + rte_bit_atomic_clear(addr, nr, rte_memory_order_relaxed) + +#define bit_atomic_assign(addr, nr, value) \ + rte_bit_atomic_assign(addr, nr, value, rte_memory_order_relaxed) + +#define bit_atomic_flip(addr, nr) \ + rte_bit_atomic_flip(addr, nr, rte_memory_order_relaxed) + +#define bit_atomic_test(addr, nr) \ + rte_bit_atomic_test(addr, nr, rte_memory_order_relaxed) + +GEN_TEST_BIT_ACCESS(test_bit_atomic_access32, bit_atomic_set, + bit_atomic_clear, bit_atomic_assign, + bit_atomic_flip, bit_atomic_test, 32) + +GEN_TEST_BIT_ACCESS(test_bit_atomic_access64, bit_atomic_set, + bit_atomic_clear, bit_atomic_assign, + bit_atomic_flip, bit_atomic_test, 64) + +#define PARALLEL_TEST_RUNTIME 0.25 + +#define GEN_TEST_BIT_PARALLEL_ASSIGN(size) \ + \ + struct parallel_access_lcore ## size \ + { \ + unsigned int bit; \ + uint ## size ##_t *word; \ + bool failed; \ + }; \ + \ + static int \ + run_parallel_assign ## size(void *arg) \ + { \ + struct parallel_access_lcore ## size *lcore = arg; \ + uint64_t deadline = rte_get_timer_cycles() + \ + PARALLEL_TEST_RUNTIME * rte_get_timer_hz(); \ + bool value = false; \ + \ + do { \ + bool new_value = rte_rand() & 1; \ + bool use_test_and_modify = rte_rand() & 1; \ + bool use_assign = rte_rand() & 1; \ + \ + if (rte_bit_atomic_test(lcore->word, lcore->bit, \ + rte_memory_order_relaxed) != value) { \ + lcore->failed = true; \ + break; \ + } \ + \ + if (use_test_and_modify) { \ + bool old_value; \ + if (use_assign) \ + old_value = rte_bit_atomic_test_and_assign( \ + lcore->word, lcore->bit, new_value, \ + rte_memory_order_relaxed); \ + else { \ + old_value = new_value ? \ + rte_bit_atomic_test_and_set( \ + lcore->word, lcore->bit, \ + rte_memory_order_relaxed) : \ + rte_bit_atomic_test_and_clear( \ + lcore->word, lcore->bit, \ + rte_memory_order_relaxed); \ + } \ + if (old_value != value) { \ + lcore->failed = true; \ + break; \ + } \ + } else { \ + if (use_assign) \ + rte_bit_atomic_assign(lcore->word, lcore->bit, \ + new_value, \ + rte_memory_order_relaxed); \ + else { \ + if (new_value) \ + rte_bit_atomic_set( \ + lcore->word, lcore->bit, \ + rte_memory_order_relaxed); \ + else \ + rte_bit_atomic_clear( \ + lcore->word, lcore->bit, \ + rte_memory_order_relaxed); \ + } \ + } \ + \ + value = new_value; \ + } while (rte_get_timer_cycles() < deadline); \ + \ + return 0; \ + } \ + \ + static int \ + test_bit_atomic_parallel_assign ## size(void) \ + { \ + unsigned int worker_lcore_id; \ + uint ## size ## _t word = 0; \ + struct parallel_access_lcore ## size lmain = { \ + .word = &word \ + }; \ + struct parallel_access_lcore ## size lworker = { \ + .word = &word \ + }; \ + \ + if (rte_lcore_count() < 2) { \ + printf("Need multiple cores to run parallel test.\n"); \ + return TEST_SKIPPED; \ + } \ + \ + worker_lcore_id = rte_get_next_lcore(-1, 1, 0); \ + \ + lmain.bit = rte_rand_max(size); \ + do { \ + lworker.bit = rte_rand_max(size); \ + } while (lworker.bit == lmain.bit); \ + \ + int rc = rte_eal_remote_launch(run_parallel_assign ## size, \ + &lworker, worker_lcore_id); \ + TEST_ASSERT(rc == 0, "Worker thread launch failed"); \ + \ + run_parallel_assign ## size(&lmain); \ + \ + rte_eal_mp_wait_lcore(); \ + \ + TEST_ASSERT(!lmain.failed, "Main lcore atomic access failed"); \ + TEST_ASSERT(!lworker.failed, "Worker lcore atomic access " \ + "failed"); \ + \ + return TEST_SUCCESS; \ + } + +GEN_TEST_BIT_PARALLEL_ASSIGN(32) +GEN_TEST_BIT_PARALLEL_ASSIGN(64) + +#define GEN_TEST_BIT_PARALLEL_TEST_AND_MODIFY(size) \ + \ + struct parallel_test_and_set_lcore ## size \ + { \ + uint ## size ##_t *word; \ + unsigned int bit; \ + uint64_t flips; \ + }; \ + \ + static int \ + run_parallel_test_and_modify ## size(void *arg) \ + { \ + struct parallel_test_and_set_lcore ## size *lcore = arg; \ + uint64_t deadline = rte_get_timer_cycles() + \ + PARALLEL_TEST_RUNTIME * rte_get_timer_hz(); \ + do { \ + bool old_value; \ + bool new_value = rte_rand() & 1; \ + bool use_assign = rte_rand() & 1; \ + \ + if (use_assign) \ + old_value = rte_bit_atomic_test_and_assign( \ + lcore->word, lcore->bit, new_value, \ + rte_memory_order_relaxed); \ + else \ + old_value = new_value ? \ + rte_bit_atomic_test_and_set( \ + lcore->word, lcore->bit, \ + rte_memory_order_relaxed) : \ + rte_bit_atomic_test_and_clear( \ + lcore->word, lcore->bit, \ + rte_memory_order_relaxed); \ + if (old_value != new_value) \ + lcore->flips++; \ + } while (rte_get_timer_cycles() < deadline); \ + \ + return 0; \ + } \ + \ + static int \ + test_bit_atomic_parallel_test_and_modify ## size(void) \ + { \ + unsigned int worker_lcore_id; \ + uint ## size ## _t word = 0; \ + unsigned int bit = rte_rand_max(size); \ + struct parallel_test_and_set_lcore ## size lmain = { \ + .word = &word, \ + .bit = bit \ + }; \ + struct parallel_test_and_set_lcore ## size lworker = { \ + .word = &word, \ + .bit = bit \ + }; \ + \ + if (rte_lcore_count() < 2) { \ + printf("Need multiple cores to run parallel test.\n"); \ + return TEST_SKIPPED; \ + } \ + \ + worker_lcore_id = rte_get_next_lcore(-1, 1, 0); \ + \ + int rc = rte_eal_remote_launch(run_parallel_test_and_modify ## size, \ + &lworker, worker_lcore_id); \ + TEST_ASSERT(rc == 0, "Worker thread launch failed"); \ + \ + run_parallel_test_and_modify ## size(&lmain); \ + \ + rte_eal_mp_wait_lcore(); \ + \ + uint64_t total_flips = lmain.flips + lworker.flips; \ + bool expected_value = total_flips % 2; \ + \ + TEST_ASSERT(expected_value == rte_bit_test(&word, bit), \ + "After %"PRId64" flips, the bit value " \ + "should be %d", total_flips, expected_value); \ + \ + uint64_t expected_word = 0; \ + rte_bit_assign(&expected_word, bit, expected_value); \ + \ + TEST_ASSERT(expected_word == word, "Untouched bits have " \ + "changed value"); \ + \ + return TEST_SUCCESS; \ + } + +GEN_TEST_BIT_PARALLEL_TEST_AND_MODIFY(32) +GEN_TEST_BIT_PARALLEL_TEST_AND_MODIFY(64) + +#define GEN_TEST_BIT_PARALLEL_FLIP(size) \ + \ + struct parallel_flip_lcore ## size \ + { \ + uint ## size ##_t *word; \ + unsigned int bit; \ + uint64_t flips; \ + }; \ + \ + static int \ + run_parallel_flip ## size(void *arg) \ + { \ + struct parallel_flip_lcore ## size *lcore = arg; \ + uint64_t deadline = rte_get_timer_cycles() + \ + PARALLEL_TEST_RUNTIME * rte_get_timer_hz(); \ + do { \ + rte_bit_atomic_flip(lcore->word, lcore->bit, \ + rte_memory_order_relaxed); \ + lcore->flips++; \ + } while (rte_get_timer_cycles() < deadline); \ + \ + return 0; \ + } \ + \ + static int \ + test_bit_atomic_parallel_flip ## size(void) \ + { \ + unsigned int worker_lcore_id; \ + uint ## size ## _t word = 0; \ + unsigned int bit = rte_rand_max(size); \ + struct parallel_flip_lcore ## size lmain = { \ + .word = &word, \ + .bit = bit \ + }; \ + struct parallel_flip_lcore ## size lworker = { \ + .word = &word, \ + .bit = bit \ + }; \ + \ + if (rte_lcore_count() < 2) { \ + printf("Need multiple cores to run parallel test.\n"); \ + return TEST_SKIPPED; \ + } \ + \ + worker_lcore_id = rte_get_next_lcore(-1, 1, 0); \ + \ + int rc = rte_eal_remote_launch(run_parallel_flip ## size, \ + &lworker, worker_lcore_id); \ + TEST_ASSERT(rc == 0, "Worker thread launch failed"); \ + \ + run_parallel_flip ## size(&lmain); \ + \ + rte_eal_mp_wait_lcore(); \ + \ + uint64_t total_flips = lmain.flips + lworker.flips; \ + bool expected_value = total_flips % 2; \ + \ + TEST_ASSERT(expected_value == rte_bit_test(&word, bit), \ + "After %"PRId64" flips, the bit value " \ + "should be %d", total_flips, expected_value); \ + \ + uint64_t expected_word = 0; \ + rte_bit_assign(&expected_word, bit, expected_value); \ + \ + TEST_ASSERT(expected_word == word, "Untouched bits have " \ + "changed value"); \ + \ + return TEST_SUCCESS; \ + } + +GEN_TEST_BIT_PARALLEL_FLIP(32) +GEN_TEST_BIT_PARALLEL_FLIP(64) + static uint32_t val32; static uint64_t val64; @@ -187,6 +488,18 @@ static struct unit_test_suite test_suite = { TEST_CASE(test_bit_access64), TEST_CASE(test_bit_once_access32), TEST_CASE(test_bit_once_access64), + TEST_CASE(test_bit_access32), + TEST_CASE(test_bit_access64), + TEST_CASE(test_bit_once_access32), + TEST_CASE(test_bit_once_access64), + TEST_CASE(test_bit_atomic_access32), + TEST_CASE(test_bit_atomic_access64), + TEST_CASE(test_bit_atomic_parallel_assign32), + TEST_CASE(test_bit_atomic_parallel_assign64), + TEST_CASE(test_bit_atomic_parallel_test_and_modify32), + TEST_CASE(test_bit_atomic_parallel_test_and_modify64), + TEST_CASE(test_bit_atomic_parallel_flip32), + TEST_CASE(test_bit_atomic_parallel_flip64), TEST_CASE(test_bit_relaxed_set), TEST_CASE(test_bit_relaxed_clear), TEST_CASE(test_bit_relaxed_test_set_clear),