zeromq是啥玩意兒?
通俗地說,ZMQ是一個開源的、跨語言的、非常簡潔的、非常高性能、非常靈活的網絡通訊庫。它的官方網址為http://www.zeromq.org/
它的性能非常高,下面是網友給出的幾款常用消息中間件性能比較:
性能測試
我一直很好奇zeromq真的能跑出那麼高的性能來嗎?從上面網友給出的性能圖看來,這個性能簡直逆天了。
俗話說好奇害死貓,我就是懷著這個好奇寫了一個測試小程序進行驗證。
這裡寫了個echo_server用於把收到的請求數據原封不動的返回給客戶端,這樣通過一收一發驗證它的性能。
寫個echo_client端,用於批量給echo_server發大量的請求消息,以壓測的方式查看和server之間的傳輸性能。
具體實現代碼如下:
echo_client.cpp
[cpp]
/////////////////////////////////////////////////////////////////////
/// File:
/// echo_client.cpp
/// Description:
/// impliment a echo client with zeromq lib
/// Author:
/// [email protected]
////////////////////////////////////////////////////////////////////
#include <zmq.hpp>
#include <string>
#include <stdlib.h>
#include <unistd.h>
#include <sys/time.h>
#include <stdio.h>
long long int gettime(){
struct timeval tv = {0, 0};
gettimeofday(&tv, NULL);
return tv.tv_sec * 1000000 + tv.tv_usec;
}
int main (int argc, char *argv[]) {
if(argc != 4){
printf("Usage:%s <message_size> <total_count> <server_host>\n", argv[0]);
return -1;
}
int message_size = atoi(argv[1]);
int total_count = atoi(argv[2]);
char *server_host = argv[3];
zmq::context_t context (3);
zmq::socket_t socket (context, ZMQ_REQ);
socket.connect(server_host) ; //tcp連接到server端
std::string data; //構造傳輸消息
for(int i=0; i<message_size; i++){
data.append("A");
}
int data_size = data.size();
zmq::message_t request((void *)data.c_str(), data_size, NULL);
zmq::message_t reply (data_size);
long long int start = gettime();
for(int i=0; i<total_count; i++) {
request.rebuild((void *)data.c_str(), data_size, NULL);
socket.send (request); //send data to server
reply.rebuild(data_size);
socket.recv (&reply, 0);//recive data from server
}
long long int end = gettime();
long long total_time = end - start;
printf("message_size=%d total_count=%ld total_time=%ldus qps=%lf rt=%lfus band_width=%ldM\n", message_size, total_count, total_time, (double)(total_count/(total_time/1000000)), (double)(total_time/total_count), (data_size*total_count)/(total_time/1000000)/(1024*1024));
return 0;
}
echo_server.cpp
[cpp]
/////////////////////////////////////////////////////////////////////
/// File:
/// echo_server.cpp
/// Description:
/// impliment a echo server with zeromq lib
/// Author:
/// [email protected]
////////////////////////////////////////////////////////////////////
#include <zmq.hpp>
#include <assert.h>
int main () {
zmq::context_t context (1);
zmq::socket_t socket (context, ZMQ_REP);
socket.bind("tcp://*:5555"); //bind
int data_size = 4096;
char buff[4*1024*1024] = "";
zmq::message_t reply (buff, sizeof(buff), NULL, NULL);
for(;;) {
reply.rebuild(buff, sizeof(buff), NULL, NULL);
assert(socket.recv (&reply, 0)); //recive
assert(socket.send (reply)); //send
}
return 0;
}
編譯並執行
編譯client端:g++ echo_client.cpp -o echo_client -g -lzmq -O3
編譯server端:g++ echo_server.cpp -o echo_server -g -lzmq -O3
啟動server端:./echo_server
啟動client端:./echo_client 32 50000 192.168.1.11
運行結果
message_size=1 total_count=50000 total_time=6210013us qps=8333.000000 rt=124.000000us band_width=0M
message_size=2 total_count=50000 total_time=6367047us qps=8333.000000 rt=127.000000us band_width=0M
message_size=32 total_count=50000 total_time=6421204us qps=8333.000000 rt=128.000000us band_width=0M
message_size=64 total_count=50000 total_time=6184839us qps=8333.000000 rt=123.000000us band_width=0M
message_size=128 total_count=50000 total_time=6786448us qps=8333.000000 rt=135.000000us band_width=1M
message_size=256 total_count=50000 total_time=7883116us qps=7142.000000 rt=157.000000us band_width=1M
message_size=512 total_count=50000 total_time=7877550us qps=7142.000000 rt=157.000000us band_width=3M
message_size=1024 total_count=50000 total_time=9842729us qps=5555.000000 rt=196.000000us band_width=5M
message_size=2048 total_count=50000 total_time=10940243us qps=5000.000000 rt=218.000000us band_width=9M
message_size=4096 total_count=50000 total_time=13938887us qps=3846.000000 rt=278.000000us band_width=15M
message_size=8192 total_count=50000 total_time=17498888us qps=2941.000000 rt=349.000000us band_width=22M
測試環境為把echo_server、echo_client分別部署在同一局域網的不同的機器上,機器之間用千兆以太網連接,機器配置為內存16G、因特爾至強8核cpu。
從上面的運行結果得到,在單線程的情況下最高可以達到8000多的qps,隨著傳輸的消息大小增加qps有所減小,在消息大小為8k的時候qps為3000左右,此時的
傳輸帶寬為22MB。
在單線程下能達到這個性能確實很不錯了。