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Tsirkin" , Cornelia Huck , qemu-devel@nongnu.org Cc: "Hao Xiang" , "Liu, Yuan1" , "Shivam Kumar" , "Ho-Ren (Jack) Chuang" , "Yichen Wang" , Bryan Zhang Subject: [PATCH v5 12/13] util/dsa: Add unit test coverage for Intel DSA task submission and completion. Date: Thu, 11 Jul 2024 15:04:50 -0700 Message-Id: <20240711220451.19780-3-yichen.wang@bytedance.com> X-Mailer: git-send-email 2.39.3 (Apple Git-146) In-Reply-To: <20240711220451.19780-1-yichen.wang@bytedance.com> References: <20240711220451.19780-1-yichen.wang@bytedance.com> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::230; envelope-from=yichen.wang@bytedance.com; helo=mail-oi1-x230.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: Hao Xiang * Test DSA start and stop path. * Test DSA configure and cleanup path. * Test DSA task submission and completion path. Signed-off-by: Bryan Zhang Signed-off-by: Hao Xiang Signed-off-by: Yichen Wang --- tests/unit/meson.build | 6 + tests/unit/test-dsa.c | 503 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 509 insertions(+) create mode 100644 tests/unit/test-dsa.c diff --git a/tests/unit/meson.build b/tests/unit/meson.build index 26c109c968..1d4d48898b 100644 --- a/tests/unit/meson.build +++ b/tests/unit/meson.build @@ -49,6 +49,12 @@ tests = { 'test-interval-tree': [], } +if config_host_data.get('CONFIG_DSA_OPT') + tests += { + 'test-dsa': [], + } +endif + if have_system or have_tools tests += { 'test-qmp-event': [testqapi], diff --git a/tests/unit/test-dsa.c b/tests/unit/test-dsa.c new file mode 100644 index 0000000000..181a547528 --- /dev/null +++ b/tests/unit/test-dsa.c @@ -0,0 +1,503 @@ +/* + * Test DSA functions. + * + * Copyright (C) Bytedance Ltd. + * + * Authors: + * Hao Xiang + * Bryan Zhang + * Yichen Wang + * + * 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 "qemu/osdep.h" +#include "qemu/host-utils.h" + +#include "qemu/cutils.h" +#include "qemu/memalign.h" +#include "qemu/dsa.h" + +/* + * TODO Communicate that DSA must be configured to support this batch size. + * TODO Alternatively, poke the DSA device to figure out batch size. + */ +#define batch_size 128 +#define page_size 4096 + +#define oversized_batch_size (batch_size + 1) +#define num_devices 2 +#define max_buffer_size (64 * 1024) + +/* TODO Make these not-hardcoded. */ +static const strList path1[] = { + {.value = (char *)"/dev/dsa/wq4.0", .next = NULL} +}; +static const strList path2[] = { + {.value = (char *)"/dev/dsa/wq4.0", .next = (strList*)&path2[1]}, + {.value = (char *)"/dev/dsa/wq4.1", .next = NULL} +}; + +static Error **errp; + +static QemuDsaBatchTask *task; + +/* A helper for running a single task and checking for correctness. */ +static void do_single_task(void) +{ + task = buffer_zero_batch_task_init(batch_size); + char buf[page_size]; + char *ptr = buf; + + buffer_is_zero_dsa_batch_sync(task, + (const void **)&ptr, + 1, + page_size); + g_assert(task->results[0] == buffer_is_zero(buf, page_size)); + + buffer_zero_batch_task_destroy(task); +} + +static void test_single_zero(void) +{ + g_assert(!qemu_dsa_init(path1, errp)); + qemu_dsa_start(); + + task = buffer_zero_batch_task_init(batch_size); + + char buf[page_size]; + char *ptr = buf; + + memset(buf, 0x0, page_size); + buffer_is_zero_dsa_batch_sync(task, + (const void **)&ptr, + 1, page_size); + g_assert(task->results[0]); + + buffer_zero_batch_task_destroy(task); + + qemu_dsa_cleanup(); +} + +static void test_single_zero_async(void) +{ + test_single_zero(); +} + +static void test_single_nonzero(void) +{ + g_assert(!qemu_dsa_init(path1, errp)); + qemu_dsa_start(); + + task = buffer_zero_batch_task_init(batch_size); + + char buf[page_size]; + char *ptr = buf; + + memset(buf, 0x1, page_size); + buffer_is_zero_dsa_batch_sync(task, + (const void **)&ptr, + 1, page_size); + g_assert(!task->results[0]); + + buffer_zero_batch_task_destroy(task); + + qemu_dsa_cleanup(); +} + +static void test_single_nonzero_async(void) +{ + test_single_nonzero(); +} + +/* count == 0 should return quickly without calling into DSA. */ +static void test_zero_count_async(void) +{ + char buf[page_size]; + buffer_is_zero_dsa_batch_sync(task, + (const void **)&buf, + 0, + page_size); +} + +static void test_null_task_async(void) +{ + if (g_test_subprocess()) { + g_assert(!qemu_dsa_init(path1, errp)); + + char buf[page_size * batch_size]; + char *addrs[batch_size]; + for (int i = 0; i < batch_size; i++) { + addrs[i] = buf + (page_size * i); + } + + buffer_is_zero_dsa_batch_sync(NULL, (const void **)addrs, + batch_size, + page_size); + } else { + g_test_trap_subprocess(NULL, 0, 0); + g_test_trap_assert_failed(); + } +} + +static void test_oversized_batch(void) +{ + g_assert(!qemu_dsa_init(path1, errp)); + qemu_dsa_start(); + + task = buffer_zero_batch_task_init(batch_size); + + char buf[page_size * oversized_batch_size]; + char *addrs[batch_size]; + for (int i = 0; i < oversized_batch_size; i++) { + addrs[i] = buf + (page_size * i); + } + + int ret = buffer_is_zero_dsa_batch_sync(task, + (const void **)addrs, + oversized_batch_size, + page_size); + g_assert(ret != 0); + + buffer_zero_batch_task_destroy(task); + + qemu_dsa_cleanup(); +} + +static void test_oversized_batch_async(void) +{ + test_oversized_batch(); +} + +static void test_zero_len_async(void) +{ + if (g_test_subprocess()) { + g_assert(!qemu_dsa_init(path1, errp)); + + task = buffer_zero_batch_task_init(batch_size); + + char buf[page_size]; + + buffer_is_zero_dsa_batch_sync(task, + (const void **)&buf, + 1, + 0); + + buffer_zero_batch_task_destroy(task); + } else { + g_test_trap_subprocess(NULL, 0, 0); + g_test_trap_assert_failed(); + } +} + +static void test_null_buf_async(void) +{ + if (g_test_subprocess()) { + g_assert(!qemu_dsa_init(path1, errp)); + + task = buffer_zero_batch_task_init(batch_size); + + buffer_is_zero_dsa_batch_sync(task, NULL, 1, page_size); + + buffer_zero_batch_task_destroy(task); + } else { + g_test_trap_subprocess(NULL, 0, 0); + g_test_trap_assert_failed(); + } +} + +static void test_batch(void) +{ + g_assert(!qemu_dsa_init(path1, errp)); + qemu_dsa_start(); + + task = buffer_zero_batch_task_init(batch_size); + + char buf[page_size * batch_size]; + char *addrs[batch_size]; + for (int i = 0; i < batch_size; i++) { + addrs[i] = buf + (page_size * i); + } + + /* + * Using whatever is on the stack is somewhat random. + * Manually set some pages to zero and some to nonzero. + */ + memset(buf + 0, 0, page_size * 10); + memset(buf + (10 * page_size), 0xff, page_size * 10); + + buffer_is_zero_dsa_batch_sync(task, + (const void **)addrs, + batch_size, + page_size); + + bool is_zero; + for (int i = 0; i < batch_size; i++) { + is_zero = buffer_is_zero((const void *)&buf[page_size * i], page_size); + g_assert(task->results[i] == is_zero); + } + + buffer_zero_batch_task_destroy(task); + + qemu_dsa_cleanup(); +} + +static void test_batch_async(void) +{ + test_batch(); +} + +static void test_page_fault(void) +{ + g_assert(!qemu_dsa_init(path1, errp)); + qemu_dsa_start(); + + char *buf[2]; + int prot = PROT_READ | PROT_WRITE; + int flags = MAP_SHARED | MAP_ANON; + buf[0] = (char *)mmap(NULL, page_size * batch_size, prot, flags, -1, 0); + assert(buf[0] != MAP_FAILED); + buf[1] = (char *)malloc(page_size * batch_size); + assert(buf[1] != NULL); + + for (int j = 0; j < 2; j++) { + task = buffer_zero_batch_task_init(batch_size); + + char *addrs[batch_size]; + for (int i = 0; i < batch_size; i++) { + addrs[i] = buf[j] + (page_size * i); + } + + buffer_is_zero_dsa_batch_sync(task, + (const void **)addrs, + batch_size, + page_size); + + bool is_zero; + for (int i = 0; i < batch_size; i++) { + is_zero = buffer_is_zero((const void *)&buf[j][page_size * i], + page_size); + g_assert(task->results[i] == is_zero); + } + buffer_zero_batch_task_destroy(task); + } + + assert(!munmap(buf[0], page_size * batch_size)); + free(buf[1]); + qemu_dsa_cleanup(); +} + +static void test_various_buffer_sizes(void) +{ + g_assert(!qemu_dsa_init(path1, errp)); + qemu_dsa_start(); + + char *buf = malloc(max_buffer_size * batch_size); + char *addrs[batch_size]; + + for (int len = 16; len <= max_buffer_size; len *= 2) { + task = buffer_zero_batch_task_init(batch_size); + + for (int i = 0; i < batch_size; i++) { + addrs[i] = buf + (len * i); + } + + buffer_is_zero_dsa_batch_sync(task, + (const void **)addrs, + batch_size, + len); + + bool is_zero; + for (int j = 0; j < batch_size; j++) { + is_zero = buffer_is_zero((const void *)&buf[len * j], len); + g_assert(task->results[j] == is_zero); + } + + buffer_zero_batch_task_destroy(task); + } + + free(buf); + + qemu_dsa_cleanup(); +} + +static void test_various_buffer_sizes_async(void) +{ + test_various_buffer_sizes(); +} + +static void test_double_start_stop(void) +{ + g_assert(!qemu_dsa_init(path1, errp)); + /* Double start */ + qemu_dsa_start(); + qemu_dsa_start(); + g_assert(qemu_dsa_is_running()); + do_single_task(); + + /* Double stop */ + qemu_dsa_stop(); + g_assert(!qemu_dsa_is_running()); + qemu_dsa_stop(); + g_assert(!qemu_dsa_is_running()); + + /* Restart */ + qemu_dsa_start(); + g_assert(qemu_dsa_is_running()); + do_single_task(); + qemu_dsa_cleanup(); +} + +static void test_is_running(void) +{ + g_assert(!qemu_dsa_init(path1, errp)); + + g_assert(!qemu_dsa_is_running()); + qemu_dsa_start(); + g_assert(qemu_dsa_is_running()); + qemu_dsa_stop(); + g_assert(!qemu_dsa_is_running()); + qemu_dsa_cleanup(); +} + +static void test_multiple_engines(void) +{ + g_assert(!qemu_dsa_init(path2, errp)); + qemu_dsa_start(); + + QemuDsaBatchTask *tasks[num_devices]; + char bufs[num_devices][page_size * batch_size]; + char *addrs[num_devices][batch_size]; + + /* + * This is a somewhat implementation-specific way + * of testing that the tasks have unique engines + * assigned to them. + */ + tasks[0] = buffer_zero_batch_task_init(batch_size); + tasks[1] = buffer_zero_batch_task_init(batch_size); + g_assert(tasks[0]->device != tasks[1]->device); + + for (int i = 0; i < num_devices; i++) { + for (int j = 0; j < batch_size; j++) { + addrs[i][j] = bufs[i] + (page_size * j); + } + + buffer_is_zero_dsa_batch_sync(tasks[i], + (const void **)addrs[i], + batch_size, page_size); + + bool is_zero; + for (int j = 0; j < batch_size; j++) { + is_zero = buffer_is_zero((const void *)&bufs[i][page_size * j], + page_size); + g_assert(tasks[i]->results[j] == is_zero); + } + } + + buffer_zero_batch_task_destroy(tasks[0]); + buffer_zero_batch_task_destroy(tasks[1]); + + qemu_dsa_cleanup(); +} + +static void test_configure_dsa_twice(void) +{ + g_assert(!qemu_dsa_init(path2, errp)); + g_assert(!qemu_dsa_init(path2, errp)); + qemu_dsa_start(); + do_single_task(); + qemu_dsa_cleanup(); +} + +static void test_configure_dsa_bad_path(void) +{ + const strList *bad_path = &(strList) { + .value = (char *)"/not/a/real/path", .next = NULL + }; + g_assert(qemu_dsa_init(bad_path, errp)); +} + +static void test_cleanup_before_configure(void) +{ + qemu_dsa_cleanup(); + g_assert(!qemu_dsa_init(path2, errp)); +} + +static void test_configure_dsa_num_devices(void) +{ + g_assert(!qemu_dsa_init(path1, errp)); + qemu_dsa_start(); + + do_single_task(); + qemu_dsa_stop(); + qemu_dsa_cleanup(); +} + +static void test_cleanup_twice(void) +{ + g_assert(!qemu_dsa_init(path2, errp)); + qemu_dsa_cleanup(); + qemu_dsa_cleanup(); + + g_assert(!qemu_dsa_init(path2, errp)); + qemu_dsa_start(); + do_single_task(); + qemu_dsa_cleanup(); +} + +static int check_test_setup(void) +{ + const strList *path[2] = {path1, path2}; + for (int i = 0; i < sizeof(path) / sizeof(strList *); i++) { + if (qemu_dsa_init(path[i], errp)) { + return -1; + } + qemu_dsa_cleanup(); + } + return 0; +} + +int main(int argc, char **argv) +{ + g_test_init(&argc, &argv, NULL); + + if (check_test_setup() != 0) { + /* + * This test requires extra setup. The current + * setup is not correct. Just skip this test + * for now. + */ + exit(0); + } + + if (num_devices > 1) { + g_test_add_func("/dsa/multiple_engines", test_multiple_engines); + } + + g_test_add_func("/dsa/async/batch", test_batch_async); + g_test_add_func("/dsa/async/various_buffer_sizes", + test_various_buffer_sizes_async); + g_test_add_func("/dsa/async/null_buf", test_null_buf_async); + g_test_add_func("/dsa/async/zero_len", test_zero_len_async); + g_test_add_func("/dsa/async/oversized_batch", test_oversized_batch_async); + g_test_add_func("/dsa/async/zero_count", test_zero_count_async); + g_test_add_func("/dsa/async/single_zero", test_single_zero_async); + g_test_add_func("/dsa/async/single_nonzero", test_single_nonzero_async); + g_test_add_func("/dsa/async/null_task", test_null_task_async); + g_test_add_func("/dsa/async/page_fault", test_page_fault); + + g_test_add_func("/dsa/double_start_stop", test_double_start_stop); + g_test_add_func("/dsa/is_running", test_is_running); + + g_test_add_func("/dsa/configure_dsa_twice", test_configure_dsa_twice); + g_test_add_func("/dsa/configure_dsa_bad_path", test_configure_dsa_bad_path); + g_test_add_func("/dsa/cleanup_before_configure", + test_cleanup_before_configure); + g_test_add_func("/dsa/configure_dsa_num_devices", + test_configure_dsa_num_devices); + g_test_add_func("/dsa/cleanup_twice", test_cleanup_twice); + + return g_test_run(); +}