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[94.196.92.184]) by smtp.gmail.com with ESMTPSA id j4-20020adfff84000000b002cda9aa1dc1sm6524348wrr.111.2023.03.04.21.14.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 04 Mar 2023 21:14:13 -0800 (PST) From: Pavel Begunkov To: io-uring@vger.kernel.org Cc: Jens Axboe , asml.silence@gmail.com Subject: [PATCH liburing v2 1/5] examples/send-zc: add defer taskrun support Date: Sun, 5 Mar 2023 05:13:04 +0000 Message-Id: X-Mailer: git-send-email 2.39.1 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/send-zerocopy.c | 19 ++++++++++++++++--- 1 file changed, 16 insertions(+), 3 deletions(-) diff --git a/examples/send-zerocopy.c b/examples/send-zerocopy.c index 2844491..d60335c 100644 --- a/examples/send-zerocopy.c +++ b/examples/send-zerocopy.c @@ -48,6 +48,7 @@ static bool cfg_zc = 1; static int cfg_nr_reqs = 8; static bool cfg_fixed_buf = 1; static bool cfg_hugetlb = 0; +static bool cfg_defer_taskrun = 0; static int cfg_family = PF_UNSPEC; static int cfg_payload_len; @@ -151,6 +152,7 @@ static inline struct io_uring_cqe *wait_cqe_fast(struct io_uring *ring) static void do_tx(int domain, int type, int protocol) { + const int notif_slack = 128; unsigned long packets = 0; unsigned long bytes = 0; struct io_uring ring; @@ -158,10 +160,14 @@ static void do_tx(int domain, int type, int protocol) uint64_t tstop; int i, fd, ret; int compl_cqes = 0; + int ring_flags = IORING_SETUP_COOP_TASKRUN | IORING_SETUP_SINGLE_ISSUER; + + if (cfg_defer_taskrun) + ring_flags |= IORING_SETUP_DEFER_TASKRUN; fd = do_setup_tx(domain, type, protocol); - ret = io_uring_queue_init(512, &ring, IORING_SETUP_COOP_TASKRUN); + ret = io_uring_queue_init(512, &ring, ring_flags); if (ret) t_error(1, ret, "io_uring: queue init"); @@ -211,7 +217,11 @@ static void do_tx(int domain, int type, int protocol) } } - ret = io_uring_submit(&ring); + if (cfg_defer_taskrun && compl_cqes >= notif_slack) + ret = io_uring_submit_and_get_events(&ring); + else + ret = io_uring_submit(&ring); + if (ret != cfg_nr_reqs) t_error(1, ret, "submit"); @@ -292,7 +302,7 @@ static void parse_opts(int argc, char **argv) cfg_payload_len = max_payload_len; - while ((c = getopt(argc, argv, "46D:p:s:t:n:z:b:l:")) != -1) { + while ((c = getopt(argc, argv, "46D:p:s:t:n:z:b:l:d")) != -1) { switch (c) { case '4': if (cfg_family != PF_UNSPEC) @@ -330,6 +340,9 @@ static void parse_opts(int argc, char **argv) case 'l': cfg_hugetlb = strtoul(optarg, NULL, 0); break; + case 'd': + cfg_defer_taskrun = 1; + break; } } -- 2.39.1