// Copyright (c) Microsoft Corporation. // Licensed under the MIT license. // This should come first. // Glibc macro to expose definitions corresponding to the POSIX.1-2008 base specification. // See https://man7.org/linux/man-pages/man7/feature_test_macros.7.html. #define _POSIX_C_SOURCE 200809L /*====================================================================================================================* * Imports * *====================================================================================================================*/ #include #include #include #include #include #include #include #include #include #include /*====================================================================================================================* * Constants * *====================================================================================================================*/ /** * @brief Data size. */ #define DATA_SIZE 64 /** * @brief Maximum number of messages to transfer. */ #define MAX_MSGS 1024 /*====================================================================================================================* * sighandler() * *====================================================================================================================*/ /** * @brief Signal handler. * * @param signum Number of received signal. */ static void sighandler(int signum) { const char *signame = strsignal(signum); fprintf(stderr, "\nReceived %s signal\n", signame); fprintf(stderr, "Exiting...\n"); exit(EXIT_SUCCESS); } /*====================================================================================================================* * push_wait() * *====================================================================================================================*/ /** * @brief Pushes a scatter-gather array to a remote socket and waits for operation to complete. * * @param qd Target queue descriptor. * @param sga Target scatter-gather array. * @param qr Storage location for operation result. */ static void push_wait(int qd, demi_sgarray_t *sga, demi_qresult_t *qr) { demi_qtoken_t qt = -1; /* Push data. */ assert(demi_push(&qt, qd, sga) == 0); /* Wait push operation to complete. */ assert(demi_wait(qr, qt, NULL) == 0); /* Parse operation result. */ assert(qr->qr_opcode == DEMI_OPC_PUSH); } /*====================================================================================================================* * pop_wait() * *====================================================================================================================*/ /** * @brief Pops a scatter-gather array and waits for operation to complete. * * @param qd Target queue descriptor. * @param qr Storage location for operation result. */ static void pop_wait(int qd, demi_qresult_t *qr) { demi_qtoken_t qt = -1; /* Pop data. */ assert(demi_pop(&qt, qd) == 0); /* Wait for pop operation to complete. */ assert(demi_wait(qr, qt, NULL) == 0); /* Parse operation result. */ assert(qr->qr_opcode == DEMI_OPC_POP); assert(qr->qr_value.sga.sga_segs != 0); } /*====================================================================================================================* * server() * *====================================================================================================================*/ /** * @brief Memory queue echo server. * * @param argc Argument count. * @param argv Argument list. * @param data_size Number of bytes in each message. * @param max_msgs Maximum number of messages to transfer. */ static void server(int argc, char *const argv[], size_t data_size, unsigned max_msgs) { size_t nbytes = 0; char name[1024]; int pipeqd_rx = -1; size_t max_bytes = data_size * max_msgs; /* Initialize demikernel */ const struct demi_args args = { .argc = argc, .argv = argv, .callback = NULL, }; assert(demi_init(&args) == 0); /* Setup memory queues. */ sprintf(name, "%s:rx", argv[2]); assert(demi_create_pipe(&pipeqd_rx, name) == 0); /* Run. */ while (nbytes < max_bytes) { demi_qresult_t qr = {0}; demi_sgarray_t sga = {0}; /* Pop scatter-gather array. */ pop_wait(pipeqd_rx, &qr); /* Extract received scatter-gather array. */ memcpy(&sga, &qr.qr_value.sga, sizeof(demi_sgarray_t)); nbytes += sga.sga_segs[0].sgaseg_len; /* Release received scatter-gather array. */ assert(demi_sgafree(&sga) == 0); fprintf(stdout, "pop (%zu)\n", nbytes); } } /*====================================================================================================================* * client() * *====================================================================================================================*/ /** * @brief Memory queue echo client. * * @param argc Argument count. * @param argv Argument list. * @param data_size Number of bytes in each message. * @param max_msgs Maximum number of messages to transfer. */ static void client(int argc, char *const argv[], size_t data_size, unsigned max_msgs) { size_t nbytes = 0; char name[1024]; int pipeqd_tx = -1; size_t max_bytes = data_size * max_msgs; /* Initialize demikernel */ const struct demi_args args = { .argc = argc, .argv = argv, .callback = NULL, }; assert(demi_init(&args) == 0); /* Setup memory queues. */ sprintf(name, "%s:rx", argv[2]); assert(demi_open_pipe(&pipeqd_tx, name) == 0); /* Run. */ while (nbytes < max_bytes) { demi_qresult_t qr = {0}; demi_sgarray_t sga = {0}; /* Allocate scatter-gather array. */ sga = demi_sgaalloc(data_size); assert(sga.sga_segs != 0); /* Cook data. */ memset(sga.sga_segs[0].sgaseg_buf, 1, data_size); /* Push scatter-gather array. */ push_wait(pipeqd_tx, &sga, &qr); nbytes += sga.sga_segs[0].sgaseg_len; /* Release sent scatter-gather array. */ assert(demi_sgafree(&sga) == 0); fprintf(stdout, "push (%zu)\n", nbytes); } } /*====================================================================================================================* * usage() * *====================================================================================================================*/ /** * @brief Prints program usage. * * @param progname Program name. */ static void usage(const char *progname) { fprintf(stderr, "Usage: %s MODE pipe-name\n", progname); fprintf(stderr, "MODE:\n"); fprintf(stderr, " --client Run in client mode.\n"); fprintf(stderr, " --server Run in server mode.\n"); } /*====================================================================================================================* * main() * *====================================================================================================================*/ /** * @brief Exercises a one-way direction communication through UDP. * * This system-level test instantiates two demikernel nodes: a client and a server. The client sends UDP packets to the * server in a tight loop. The server process in a tight loop received UDP packets from the client. * * @param argc Argument count. * @param argv Argument list. * * @return On successful completion EXIT_SUCCESS is returned. */ int main(int argc, char *const argv[]) { /* Install signal handlers. */ signal(SIGINT, sighandler); signal(SIGQUIT, sighandler); signal(SIGTSTP, sighandler); if (argc >= 3) { size_t data_size = DATA_SIZE; unsigned max_msgs = MAX_MSGS; if (argc >= 4) sscanf(argv[3], "%zu", &data_size); if (argc >= 5) sscanf(argv[4], "%u", &max_msgs); /* Run. */ if (!strcmp(argv[1], "--server")) server(argc, argv, data_size, max_msgs); else if (!strcmp(argv[1], "--client")) client(argc, argv, data_size, max_msgs); return (EXIT_SUCCESS); } usage(argv[0]); return (EXIT_SUCCESS); }