jitter_test.cpp
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/*
* Test for analyzing the jitter of commands.
*/
#include <iostream>
#include <iomanip>
#include <string.h>
#include "redox.hpp"
using namespace std;
using redox::Redox;
using redox::Command;
using redox::Subscriber;
double time_s() {
unsigned long ms = chrono::system_clock::now().time_since_epoch() / chrono::microseconds(1);
return (double)ms / 1e6;
}
/**
* Prints time statistics on the received reply.
*
* t: Time since the program start.
* dt_callback: Time since the last reply was received.
* dt_msg: Time of the new message minus time of the last message.
* age_of_data: Time of message received minus time of message set.
*/
void print_time(double t, double dt_callback, double dt_msg, double age_of_data) {
cout << "t: " << t * 1000
<< std::setiosflags(std::ios::fixed)
<< std::setprecision(3)
<< " | dt callback: " << dt_callback * 1000
<< " | dt msg: " << dt_msg * 1000
<< " | age of data: " << age_of_data * 1000 << endl;
}
int main(int argc, char* argv[]) {
string usage_string = "Usage: " + string(argv[0])
+ " --(set-async|get-async|set-sync|get-sync|get-pubsub|set-pubsub) [freq]";
if(argc != 3) {
cerr << usage_string<< endl;
return 1;
}
bool nowait = true;
std::string host = "localhost";
int port = 6379;
Redox rdx;
if(nowait) rdx.noWait(true);
Subscriber rdx_sub;
if(nowait) rdx_sub.noWait(true);
double freq = stod(argv[2]); // Hz
double dt = 1 / freq; // s
int iter = 1000000;
atomic_int count(0);
double t0 = time_s();
double t = t0;
double t_new = t;
double t_last_reply = t;
double t_this_reply = t;
if(!strcmp(argv[1], "--get-async")) {
if(!rdx.connect(host, port)) return 1;
while(count < iter) {
rdx.command<string>({"GET", "jitter_test:time"},
[&](Command<string>& c) {
if (!c.ok()) {
cerr << "Bad reply: " << c.status() << endl;
} else {
t_new = time_s();
t_this_reply = stod(c.reply());
print_time(
t_new - t0,
t_new - t,
t_this_reply - t_last_reply,
t_new - t_this_reply
);
t = t_new;
t_last_reply = t_this_reply;
}
count++;
if (count == iter) rdx.stop();
}
);
this_thread::sleep_for(chrono::microseconds((int)(dt * 1e6)));
}
} else if(!strcmp(argv[1], "--get-async-loop")) {
if(!rdx.connect(host, port)) return 1;
rdx.commandLoop<string>({"GET", "jitter_test:time"},
[&](Command<string>& c) {
if (!c.ok()) {
cerr << "Bad reply: " << c.status() << endl;
} else {
t_new = time_s();
t_this_reply = stod(c.reply());
print_time(
t_new - t0,
t_new - t,
t_this_reply - t_last_reply,
t_new - t_this_reply
);
t = t_new;
t_last_reply = t_this_reply;
}
count++;
if (count == iter) rdx.stop();
},
dt
);
} else if(!strcmp(argv[1], "--set-async")) {
if(!rdx.connect(host, port)) return 1;
while (count < iter) {
rdx.command<string>({"SET", "jitter_test:time", to_string(time_s())},
[&](Command<string>& c) {
if (!c.ok()) {
cerr << "Error setting value: " << c.status() << endl;
}
count++;
if (count == iter) rdx.stop();
}
);
this_thread::sleep_for(chrono::microseconds((int) (dt * 1e6)));
}
} else if(!strcmp(argv[1], "--get-sync")) {
if(!rdx.connect(host, port)) return 1;
while(count < iter) {
Command<string>& c = rdx.commandSync<string>({"GET", "jitter_test:time"});
if(!c.ok()) {
cerr << "Error setting value: " << c.status() << endl;
} else {
t_new = time_s();
t_this_reply = stod(c.reply());
print_time(
t_new - t0,
t_new - t,
t_this_reply - t_last_reply,
t_new - t_this_reply
);
t = t_new;
t_last_reply = t_this_reply;
}
count++;
if(count == iter) rdx.stop();
c.free();
this_thread::sleep_for(chrono::microseconds((int)((dt) * 1e6)));
}
} else if(!strcmp(argv[1], "--set-sync")) {
if(!rdx.connect(host, port)) return 1;
while(count < iter){
Command<string>& c = rdx.commandSync<string>({"SET", "jitter_test:time", to_string(time_s())});
if(!c.ok()) {
cerr << "Error setting value: " << c.status() << endl;
}
count++;
if(count == iter) rdx.stop();
c.free();
this_thread::sleep_for(chrono::microseconds((int)((dt) * 1e6)));
}
} else if(!strcmp(argv[1], "--get-pubsub")) {
if(!rdx_sub.connect(host, port)) return 1;
auto got_message = [&](const string& topic, const string& msg) {
t_new = time_s();
t_this_reply = stod(msg);
print_time(
t_new - t0,
t_new - t,
t_this_reply - t_last_reply,
t_new - t_this_reply
);
t = t_new;
t_last_reply = t_this_reply;
count++;
if (count == iter) rdx.stop();
};
rdx_sub.subscribe("jitter_test:time", got_message);
} else if(!strcmp(argv[1], "--set-pubsub")) {
if(!rdx.connect(host, port)) return 1;
while (count < iter) {
double t1 = time_s();
rdx.command<int>({"PUBLISH", "jitter_test:time", to_string(time_s())},
[&](Command<int>& c) {
if (!c.ok()) {
cerr << "Error setting value: " << c.status() << endl;
}
count++;
if (count == iter) rdx.stop();
}
);
double wait = dt - (time_s() - t1);
this_thread::sleep_for(chrono::microseconds((int) (wait * 1e6)));
}
} else {
cerr << usage_string << endl;
return 1;
}
rdx.wait();
rdx_sub.wait();
return 0;
};