diff options
author | Jens Axboe <axboe@kernel.dk> | 2019-04-17 08:57:25 -0600 |
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committer | Jens Axboe <axboe@kernel.dk> | 2019-04-17 08:57:25 -0600 |
commit | 26993e98723e1f2d9be94b53068ead1e4a9a849d (patch) | |
tree | 858ad640e2efde42743f64ff7a556a8c68de9a61 /test/cq-full.c | |
parent | 8115820eb9343d4fa49f4933a2fd7d7006796cc3 (diff) |
Add SQ/CQ overflow tests
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'test/cq-full.c')
-rw-r--r-- | test/cq-full.c | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/test/cq-full.c b/test/cq-full.c new file mode 100644 index 0000000..426eb4a --- /dev/null +++ b/test/cq-full.c @@ -0,0 +1,86 @@ +/* + * Description: test CQ ring overflow + * + */ +#include <errno.h> +#include <stdio.h> +#include <unistd.h> +#include <stdlib.h> +#include <string.h> +#include <fcntl.h> + +#include "../src/liburing.h" + +static int queue_n_nops(struct io_uring *ring, int n) +{ + struct io_uring_sqe *sqe; + int i, ret; + + for (i = 0; i < n; i++) { + sqe = io_uring_get_sqe(ring); + if (!sqe) { + printf("get sqe failed\n"); + goto err; + } + + io_uring_prep_nop(sqe); + } + + ret = io_uring_submit(ring); + if (ret < n) { + printf("Submitted only %d\n", ret); + goto err; + } else if (ret < 0) { + printf("sqe submit failed: %d\n", ret); + goto err; + } + + return 0; +err: + return 1; +} + +int main(int argc, char *argv[]) +{ + struct io_uring_cqe *cqe; + struct io_uring ring; + int i, ret; + + ret = io_uring_queue_init(4, &ring, 0); + if (ret) { + printf("ring setup failed\n"); + return 1; + + } + + if (queue_n_nops(&ring, 4)) + goto err; + if (queue_n_nops(&ring, 4)) + goto err; + if (queue_n_nops(&ring, 4)) + goto err; + + i = 0; + do { + ret = io_uring_get_completion(&ring, &cqe); + if (ret < 0) { + printf("wait completion %d\n", ret); + goto err; + } + if (!cqe) + break; + i++; + } while (1); + + if (i != 8 || *ring.cq.koverflow != 4) { + printf("CQ overflow fail: %d completions, %u overflow\n", i, + *ring.cq.koverflow); + goto err; + } + + io_uring_queue_exit(&ring); + return 0; +err: + io_uring_queue_exit(&ring); + return 1; +} |