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//
// Copyright 2016 Garrett D'Amore <garrett@damore.org>
//
// This software is supplied under the terms of the MIT License, a
// copy of which should be located in the distribution where this
// file was obtained (LICENSE.txt). A copy of the license may also be
// found online at https://opensource.org/licenses/MIT.
//
#include "nng.h"
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
// We steal access to the clock and thread functions so that we can
// work on Windows too. These functions are *not* part of nng's public
// API, so don't be lazy like this! All nni_ symbols are subject to
// change without notice, and not part of the stable API or ABI.
#include "core/nng_impl.h"
static void latency_client(const char *, int, int);
static void latency_server(const char *, int, int);
static void do_remote_lat(int argc, char **argv);
static void do_local_lat(int argc, char **argv);
static void die(const char *, ...);
// perf implements the same performance tests found in the standard
// nanomsg & mangos performance tests. As with mangos, the decision
// about which test to run is determined by the program name (ARGV[0}])
// that it is run under.
//
// Options are:
//
// - remote_lat - remote latency side (client, aka latency_client)
// - local_lat - local latency side (server, aka latency_server)
// - local_thr - local throughput side
// - remote_thr - remote throughput side
// - inproc_lat - inproc latency
// - inproc_thr - inproc throughput
//
int
main(int argc, char **argv)
{
char *prog;
// Allow -m <remote_late> or whatever to override argv[0].
if ((argc >= 3) && (strcmp(argv[1], "-m") == 0)) {
prog = argv[1];
argv += 3;
argc -= 3;
} else {
if (((prog = strrchr(argv[0], '/')) != NULL) ||
((prog = strrchr(argv[0], '\\')) != NULL) ||
((prog = strrchr(argv[0], ':')) != NULL)) {
prog++;
} else {
prog = argv[0];
}
argc--;
argv++;
}
if ((strcmp(prog, "remote_lat") == 0) ||
(strcmp(prog, "latency_client") == 0)) {
do_remote_lat(argc, argv);
} else if ((strcmp(prog, "local_lat") == 0) ||
(strcmp(prog, "latency_server") == 0)) {
do_local_lat(argc, argv);
} else {
die("Unknown program mode? Use -m <mode>.");
}
}
static void
die(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
va_end(ap);
fprintf(stderr, "\n");
exit(2);
}
static int
parse_int(const char *arg, const char *what)
{
long val;
char *eptr;
val = strtol(arg, &eptr, 10);
// Must be a postive number less than around a billion.
if ((val < 0) || (val > (1<<30)) || (*eptr != 0) || (eptr == arg)) {
die("Invalid %s", what);
}
return ((int) val);
}
void
do_local_lat(int argc, char **argv)
{
long int msgsize;
long int trips;
if (argc != 3) {
die("Usage: local_lat <listen-addr> <msg-size> <roundtrips>");
}
msgsize = parse_int(argv[1], "message size");
trips = parse_int(argv[2], "round-trips");
latency_server(argv[0], msgsize, trips);
}
void
do_remote_lat(int argc, char **argv)
{
long int msgsize;
long int trips;
if (argc != 3) {
die("Usage: remote_lat <connect-to> <msg-size> <roundtrips>");
}
msgsize = parse_int(argv[1], "message size");
trips = parse_int(argv[2], "round-trips");
latency_client(argv[0], msgsize, trips);
}
void
latency_client(const char *addr, int msgsize, int trips)
{
nng_socket *s;
nng_msg *msg;
nni_time start, end;
int rv;
int i;
float total;
float latency;
if ((rv = nng_open(&s, NNG_PROTO_PAIR)) != 0) {
die("nng_socket: %s", nng_strerror(rv));
}
// XXX: set no delay
// XXX: other options (TLS in the future?, Linger?)
if ((rv = nng_dial(s, addr, NULL, NNG_FLAG_SYNCH)) != 0) {
die("nng_dial: %s", nng_strerror(rv));
}
if (nng_msg_alloc(&msg, msgsize) != 0) {
die("nng_msg_alloc: %s", nng_strerror(rv));
}
start = nni_clock();
for (i = 0; i < trips; i++) {
if ((rv = nng_sendmsg(s, msg, 0)) != 0) {
die("nng_sendmsg: %s", nng_strerror(rv));
}
if ((rv = nng_recvmsg(s, &msg, 0)) != 0) {
die("nng_recvmsg: %s", nng_strerror(rv));
}
}
end = nni_clock();
nni_msg_free(msg);
total = (end - start) / 1.0;
latency = (total / (trips * 2));
printf("total time: %.3f [s]\n", total / 1000000.0);
printf("message size: %d [B]\n", msgsize);
printf("round trip count: %d\n", trips);
printf("average latency: %.3f [us]\n", latency);
}
void
latency_server(const char *addr, int msgsize, int trips)
{
nng_socket *s;
nng_msg *msg;
int rv;
int i;
size_t len;
if ((rv = nng_open(&s, NNG_PROTO_PAIR)) != 0) {
die("nng_socket: %s", nng_strerror(rv));
}
// XXX: set no delay
// XXX: other options (TLS in the future?, Linger?)
if ((rv = nng_listen(s, addr, NULL, NNG_FLAG_SYNCH)) != 0) {
die("nng_listen: %s", nng_strerror(rv));
}
for (i = 0; i < trips; i++) {
if ((rv = nng_recvmsg(s, &msg, 0)) != 0) {
die("nng_recvmsg: %s", nng_strerror(rv));
}
nng_msg_body(msg, &len);
if (len != msgsize) {
die("wrong message size: %d != %d", len, msgsize);
}
if ((rv = nng_sendmsg(s, msg, 0)) != 0) {
die("nng_sendmsg: %s", nng_strerror(rv));
}
}
// Wait a bit for things to drain... linger should do this.
// 100ms ought to be enough.
nni_usleep(100000);
}
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