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Fri, 22 Jul 2022 03:38:11 -0700 (PDT) Received: from 127.0.0.1localhost.com ([2620:10d:c092:600::2:a3d]) by smtp.gmail.com with ESMTPSA id p21-20020a05600c205500b003a2eacc8179sm4572832wmg.27.2022.07.22.03.38.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 22 Jul 2022 03:38:10 -0700 (PDT) From: Pavel Begunkov To: io-uring@vger.kernel.org Cc: Jens Axboe , asml.silence@gmail.com Subject: [PATCH liburing v2 1/2] examples: add a simple single-shot poll benchmark Date: Fri, 22 Jul 2022 11:37:05 +0100 Message-Id: <20a5afbb4f8aeb586b6ce04a623264f18c4fe467.1658484803.git.asml.silence@gmail.com> X-Mailer: git-send-email 2.37.0 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org Signed-off-by: Pavel Begunkov --- examples/Makefile | 3 +- examples/poll-bench.c | 101 ++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 103 insertions(+), 1 deletion(-) create mode 100644 examples/poll-bench.c diff --git a/examples/Makefile b/examples/Makefile index 95a45f9..8e7067f 100644 --- a/examples/Makefile +++ b/examples/Makefile @@ -13,7 +13,8 @@ endif example_srcs := \ io_uring-cp.c \ io_uring-test.c \ - link-cp.c + link-cp.c \ + poll-bench.c all_targets := diff --git a/examples/poll-bench.c b/examples/poll-bench.c new file mode 100644 index 0000000..e3c0052 --- /dev/null +++ b/examples/poll-bench.c @@ -0,0 +1,101 @@ +/* SPDX-License-Identifier: MIT */ +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "liburing.h" + +static char buf[4096]; +static unsigned long runtime_ms = 10000; + +static unsigned long gettimeofday_ms(void) +{ + struct timeval tv; + + gettimeofday(&tv, NULL); + return (tv.tv_sec * 1000) + (tv.tv_usec / 1000); +} + +int main(void) +{ + unsigned long tstop; + unsigned long nr_reqs = 0; + struct io_uring_cqe *cqe; + struct io_uring_sqe *sqe; + struct io_uring ring; + int pipe1[2]; + int ret, i, qd = 32; + + if (pipe(pipe1) != 0) { + perror("pipe"); + return 1; + } + + ret = io_uring_queue_init(1024, &ring, IORING_SETUP_SINGLE_ISSUER); + if (ret == -EINVAL) { + fprintf(stderr, "can't single\n"); + ret = io_uring_queue_init(1024, &ring, 0); + } + if (ret) { + fprintf(stderr, "child: ring setup failed: %d\n", ret); + return 1; + } + + ret = io_uring_register_files(&ring, pipe1, 2); + if (ret < 0) { + fprintf(stderr, "io_uring_register_files failed\n"); + return 1; + } + + ret = io_uring_register_ring_fd(&ring); + if (ret < 0) { + fprintf(stderr, "io_uring_register_ring_fd failed\n"); + return 1; + } + + tstop = gettimeofday_ms() + runtime_ms; + do { + for (i = 0; i < qd; i++) { + sqe = io_uring_get_sqe(&ring); + io_uring_prep_poll_add(sqe, 0, POLLIN); + sqe->flags |= IOSQE_FIXED_FILE; + sqe->user_data = 1; + } + + ret = io_uring_submit(&ring); + if (ret != qd) { + fprintf(stderr, "child: sqe submit failed: %d\n", ret); + return 1; + } + + ret = write(pipe1[1], buf, 1); + if (ret != 1) { + fprintf(stderr, "write failed %i\n", errno); + return 1; + } + ret = read(pipe1[0], buf, 1); + if (ret != 1) { + fprintf(stderr, "read failed %i\n", errno); + return 1; + } + + for (i = 0; i < qd; i++) { + ret = io_uring_wait_cqe(&ring, &cqe); + if (ret < 0) { + fprintf(stderr, "child: wait completion %d\n", ret); + break; + } + io_uring_cqe_seen(&ring, cqe); + nr_reqs++; + } + } while (gettimeofday_ms() < tstop); + + fprintf(stderr, "requests/s: %lu\n", nr_reqs * 1000UL / runtime_ms); + return 0; +} -- 2.37.0