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Signed-off-by: Pavel Begunkov --- examples/send-zerocopy.c | 70 ++++++++++++++++++++++++++++------------ 1 file changed, 49 insertions(+), 21 deletions(-) diff --git a/examples/send-zerocopy.c b/examples/send-zerocopy.c index b4721672..a7465812 100644 --- a/examples/send-zerocopy.c +++ b/examples/send-zerocopy.c @@ -43,6 +43,8 @@ #include "liburing.h" +#define PATTERN_SIZE 26 + #define ZC_TAG 0xfffffffULL #define MAX_SUBMIT_NR 512 #define MAX_THREADS 100 @@ -76,11 +78,12 @@ static int cfg_payload_len; static int cfg_port = 8000; static int cfg_runtime_ms = 4200; static bool cfg_rx_poll = false; +static bool cfg_verify; static socklen_t cfg_alen; static char *str_addr = NULL; -static char payload_buf[IP_MAXPACKET] __attribute__((aligned(4096))); +static char payload_buf[IP_MAXPACKET + PATTERN_SIZE] __attribute__((aligned(4096))); static char *payload; static struct thread_data threads[MAX_THREADS]; static pthread_barrier_t barrier; @@ -376,7 +379,7 @@ static void do_tx(struct thread_data *td, int domain, int type, int protocol) } iov.iov_base = payload; - iov.iov_len = cfg_payload_len; + iov.iov_len = cfg_payload_len + PATTERN_SIZE; ret = io_uring_register_buffers(&ring, &iov, 1); if (ret) @@ -403,13 +406,18 @@ static void do_tx(struct thread_data *td, int domain, int type, int protocol) unsigned msg_flags = MSG_WAITALL; for (i = 0; i < cfg_nr_reqs; i++) { + char *buf = payload; + + if (cfg_verify && cfg_type == SOCK_STREAM) + buf += td->bytes % PATTERN_SIZE; + sqe = io_uring_get_sqe(&ring); if (!cfg_zc) - io_uring_prep_send(sqe, fd, payload, + io_uring_prep_send(sqe, fd, buf, cfg_payload_len, 0); else { - io_uring_prep_send_zc(sqe, fd, payload, + io_uring_prep_send_zc(sqe, fd, buf, cfg_payload_len, msg_flags, 0); if (cfg_fixed_buf) { sqe->ioprio |= IORING_RECVSEND_FIXED_BUF; @@ -527,7 +535,7 @@ 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:I:b:l:dC:T:Ry")) != -1) { + while ((c = getopt(argc, argv, "46D:p:s:t:n:z:I:b:l:dC:T:Ryv")) != -1) { switch (c) { case '4': if (cfg_family != PF_UNSPEC) @@ -582,6 +590,9 @@ static void parse_opts(int argc, char **argv) case 'R': cfg_rx = 1; break; + case 'v': + cfg_verify = true; + break; case 'y': cfg_rx_poll = 1; break; @@ -604,8 +615,13 @@ static void parse_opts(int argc, char **argv) t_error(1, 0, "-n: submit batch can't be zero"); if (cfg_ifname && cfg_rx) t_error(1, 0, "Interface can only be specified for tx"); - if (cfg_nr_reqs > 1 && cfg_type == SOCK_STREAM) + if (cfg_nr_reqs > 1 && cfg_type == SOCK_STREAM) { printf("warning: submit batching >1 with TCP sockets will cause data reordering"); + if (cfg_verify) + t_error(1, 0, "can't verify data because of reordering"); + } + if (cfg_rx && cfg_verify) + t_error(1, 0, "Server mode doesn't support data verification"); str_addr = daddr; @@ -613,6 +629,32 @@ static void parse_opts(int argc, char **argv) usage(argv[0]); } +static void init_buffers(void) +{ + size_t size; + int i; + + payload = payload_buf; + size = sizeof(payload_buf); + + if (cfg_hugetlb) { + size = 1 << 21; + payload = mmap(NULL, size, PROT_READ | PROT_WRITE, + MAP_PRIVATE | MAP_HUGETLB | MAP_HUGE_2MB | MAP_ANONYMOUS, + -1, 0); + if (payload == MAP_FAILED) + t_error(0, 1, "huge pages alloc failed"); + } + + if (cfg_payload_len + PATTERN_SIZE > size) + t_error(1, 0, "Buffers are too small"); + + if (cfg_verify) { + for (i = 0; i < size; i++) + payload[i] = 'a' + (i % PATTERN_SIZE); + } +} + int main(int argc, char **argv) { unsigned long long tsum = 0; @@ -622,24 +664,10 @@ int main(int argc, char **argv) void *res; parse_opts(argc, argv); + init_buffers(); set_cpu_affinity(); - payload = payload_buf; - if (cfg_hugetlb) { - payload = mmap(NULL, 2*1024*1024, PROT_READ | PROT_WRITE, - MAP_PRIVATE | MAP_HUGETLB | MAP_HUGE_2MB | MAP_ANONYMOUS, - -1, 0); - if (payload == MAP_FAILED) { - fprintf(stderr, "hugetlb alloc failed\n"); - return 1; - } - } - pthread_barrier_init(&barrier, NULL, cfg_nr_threads); - - for (i = 0; i < IP_MAXPACKET; i++) - payload[i] = 'a' + (i % 26); - for (i = 0; i < cfg_nr_threads; i++) { td = &threads[i]; td->idx = i; -- 2.48.1