在Ubuntu 12.04 LTS下使用gwan_linux64-bit.tar.bz2拆包并运行gwan
然后将wrk指向它(使用空文件null.html)
wrk --timeout 10 -t 2 -c 100 -d20s http://127.0.0.1:8080/null.html
Running 20s test @ http://127.0.0.1:8080/null.html
2 threads and 100 connections
Thread Stats Avg Stdev Max +/- Stdev
Latency 11.65s 5.10s 13.89s 83.91%
Req/Sec 3.33k 3.65k 12.33k 75.19%
125067 requests in 20.01s, 32.08MB read
Socket errors: connect 0, read 37, write 0, timeout 49
Requests/sec: 6251.46
Transfer/sec: 1.60MB
..非常差的性能，实际上似乎存在某种巨大的延迟问题。
在测试期间，gwan繁忙200％，wrk繁忙67％。
指向nginx，wrk繁忙200％，nginx繁忙45％:
wrk --timeout 10 -t 2 -c 100 -d20s http://127.0.0.1/null.html
Thread Stats Avg Stdev Max +/- Stdev
Latency 371.81us 134.05us 24.04ms 91.26%
Req/Sec 72.75k 7.38k 109.22k 68.21%
2740883 requests in 20.00s, 540.95MB read
Requests/sec: 137046.70
Transfer/sec: 27.05MB
将weighttpd指向nginx可获得更快的结果:
/usr/local/bin/weighttp -k -n 2000000 -c 500 -t 3 http://127.0.0.1/null.html
weighttp - a lightweight and simple webserver benchmarking tool
starting benchmark...
spawning thread #1: 167 concurrent requests, 666667 total requests
spawning thread #2: 167 concurrent requests, 666667 total requests
spawning thread #3: 166 concurrent requests, 666666 total requests
progress: 9% done
progress: 19% done
progress: 29% done
progress: 39% done
progress: 49% done
progress: 59% done
progress: 69% done
progress: 79% done
progress: 89% done
progress: 99% done
finished in 7 sec, 13 millisec and 293 microsec, 285172 req/s, 57633 kbyte/s
requests: 2000000 total, 2000000 started, 2000000 done, 2000000 succeeded, 0 failed, 0 errored
status codes: 2000000 2xx, 0 3xx, 0 4xx, 0 5xx
traffic: 413901205 bytes total, 413901205 bytes http, 0 bytes data
该服务器是KVM下的虚拟8核心专用服务器(裸机)
我从哪里开始寻找gwan在此平台上遇到的问题？
我已经在同一操作系统上测试了lighttpd，nginx和node.js，结果均符合预期。已使用扩展的临时端口，增加的限制，调整的时间等待回收等以通常的方式对服务器进行了调整。
最佳答案
11月7日更新:我们已经修复了G-WAN v4.11.7中的空文件问题，并且在该游戏中，G-WAN现在(比禁用Nginx快)快了Nginx两倍。
G-WAN的最新版本比带有大小文件的Nginx更快，并且默认情况下，G-WAN缓存处于禁用状态，以使人们更容易将G-WAN与其他服务器(如Nginx)进行比较。
Nginx具有一些缓存功能(用于跳过stat()调用的fd cahe和基于Memcached的模块)，但是两者都必须比G-WAN的本地缓存慢得多。
对于某些应用程序(例如CDN)，也希望禁用缓存。其他应用程序(例如AJAX应用程序)极大地受益于G-WAN缓存功能，因此即使在每个请求的基础上，也可以随意重新启用缓存。
希望这可以澄清这个问题。
首先，标题具有误导性，因为上面记录不充分的测试没有使用相同的工具，也没有使用G-WAN测试获取的HTTP资源。
[*]您的nginx.conf文件在哪里？这两个服务器的HTTP响应 header 是什么？您的“裸机” 8核CPU是什么？
G-WAN测试基于ab.c，这是G-WAN团队针对weighttp(Lighttpd服务器团队制造的测试工具)编写的包装，因为ab.c公开的信息是much more informative。
其次，测试的文件"null.html"是...一个空文件。
我们不会浪费时间讨论这种测试的不相关性(您的网站正在提供多少空HTML文件？)，但这很可能是观察到的“性能较差”的原因。
G-WAN并不是为服务空文件而创建的(我们从未尝试也从未要求这样做)。但是我们一定会添加此功能，以避免这种测试造成的困惑。
当您想“检查声明”时，我建议您将weighttp(测试中最快的HTTP加载工具)与100.bin文件(具有不可压缩MIME类型的100字节文件:此处不涉及Gzip)一起使用。
使用非空文件Nginx is massively slower than G-WAN，即使在独立测试中也是如此。
到目前为止，我们还不知道wrk，但它似乎是Nginx team制作的工具:
“wrk是专门为尝试将nginx推向极限而编写的，
在第一轮测试中，它被推升至0.5Mr/s。”
更新(一天后)
由于您不必费心发布更多数据，因此我们做到了:
wrk weighttp
----------------------- -----------------------
Web Server 0.html RPS 100.html RPS 0.html RPS 100.html RPS
---------- ---------- ------------ ---------- ------------
G-WAN 80,783.03 649,367.11 175,515 717,813
Nginx 198,800.93 179,939.40 184,046 199,075
就像在您的测试中一样，我们可以看到
wrk比weighttp稍慢。我们还可以看到，使用两个HTTP加载工具，G-WAN都比Nginx快。
以下是详细的结果:
广域网
./wrk -c300 -d3 -t6 "http://127.0.0.1:8080/0.html"
Running 3s test @ http://127.0.0.1:8080/0.html
6 threads and 300 connections
Thread Stats Avg Stdev Max +/- Stdev
Latency 3.87ms 5.30ms 80.97ms 99.53%
Req/Sec 14.73k 1.60k 16.33k 94.67%
248455 requests in 3.08s, 55.68MB read
Socket errors: connect 0, read 248448, write 0, timeout 0
Requests/sec: 80783.03
Transfer/sec: 18.10MB
./wrk -c300 -d3 -t6 "http://127.0.0.1:8080/100.html"
Running 3s test @ http://127.0.0.1:8080/100.html
6 threads and 300 connections
Thread Stats Avg Stdev Max +/- Stdev
Latency 263.15us 381.82us 16.50ms 99.60%
Req/Sec 115.55k 14.38k 154.55k 82.70%
1946700 requests in 3.00s, 655.35MB read
Requests/sec: 649367.11
Transfer/sec: 218.61MB
weighttp -kn300000 -c300 -t6 "http://127.0.0.1:8080/0.html"
progress: 100% done
finished in 1 sec, 709 millisec and 252 microsec, 175515 req/s, 20159 kbyte/s
requests: 300000 total, 300000 started, 300000 done, 150147 succeeded, 149853 failed, 0 errored
status codes: 150147 2xx, 0 3xx, 0 4xx, 0 5xx
traffic: 35284545 bytes total, 35284545 bytes http, 0 bytes data
weighttp -kn300000 -c300 -t6 "http://127.0.0.1:8080/100.html"
progress: 100% done
finished in 0 sec, 417 millisec and 935 microsec, 717813 req/s, 247449 kbyte/s
requests: 300000 total, 300000 started, 300000 done, 300000 succeeded, 0 failed, 0 errored
status codes: 300000 2xx, 0 3xx, 0 4xx, 0 5xx
traffic: 105900000 bytes total, 75900000 bytes http, 30000000 bytes data
Nginx的
./wrk -c300 -d3 -t6 "http://127.0.0.1:8080/100.html"
Running 3s test @ http://127.0.0.1:8080/100.html
6 threads and 300 connections
Thread Stats Avg Stdev Max +/- Stdev
Latency 1.54ms 1.16ms 11.67ms 72.91%
Req/Sec 34.47k 6.02k 56.31k 70.65%
539743 requests in 3.00s, 180.42MB read
Requests/sec: 179939.40
Transfer/sec: 60.15MB
./wrk -c300 -d3 -t6 "http://127.0.0.1:8080/0.html"
Running 3s test @ http://127.0.0.1:8080/0.html
6 threads and 300 connections
Thread Stats Avg Stdev Max +/- Stdev
Latency 1.44ms 1.15ms 9.37ms 75.93%
Req/Sec 38.16k 8.57k 62.20k 69.98%
596070 requests in 3.00s, 140.69MB read
Requests/sec: 198800.93
Transfer/sec: 46.92MB
weighttp -kn300000 -c300 -t6 "http://127.0.0.1:8080/0.html"
progress: 100% done
finished in 1 sec, 630 millisec and 19 microsec, 184046 req/s, 44484 kbyte/s
requests: 300000 total, 300000 started, 300000 done, 300000 succeeded, 0 failed, 0 errored
status codes: 300000 2xx, 0 3xx, 0 4xx, 0 5xx
traffic: 74250375 bytes total, 74250375 bytes http, 0 bytes data
weighttp -kn300000 -c300 -t6 "http://127.0.0.1:8080/100.html"
progress: 100% done
finished in 1 sec, 506 millisec and 968 microsec, 199075 req/s, 68140 kbyte/s
requests: 300000 total, 300000 started, 300000 done, 300000 succeeded, 0 failed, 0 errored
status codes: 300000 2xx, 0 3xx, 0 4xx, 0 5xx
traffic: 105150400 bytes total, 75150400 bytes http, 30000000 bytes data
Nginx配置文件试图匹配G-WAN的行为
# ./configure --without-http_charset_module --without-http_ssi_module
# --without-http_userid_module --without-http_rewrite_module
# --without-http_limit_zone_module --without-http_limit_req_module
user www-data;
worker_processes 6;
worker_rlimit_nofile 500000;
pid /var/run/nginx.pid;
events {
# tried other values up to 100000 without better results
worker_connections 4096;
# multi_accept on; seems to be slower
multi_accept off;
use epoll;
}
http {
charset utf-8; # HTTP "Content-Type:" header
sendfile on;
tcp_nopush on;
tcp_nodelay on;
keepalive_timeout 10;
keepalive_requests 10; # 1000+ slows-down nginx enormously...
types_hash_max_size 2048;
include /usr/local/nginx/conf/mime.types;
default_type application/octet-stream;
gzip off; # adjust for your tests
gzip_min_length 500;
gzip_vary on; # HTTP "Vary: Accept-Encoding" header
gzip_types text/plain text/css application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript;
# cache metadata (file time, size, existence, etc) to prevent syscalls
# this does not cache file contents. It should helps in benchmarks where
# a limited number of files is accessed more often than others (this is
# our case as we serve one single file fetched repeatedly)
# THIS IS ACTUALY SLOWING-DOWN THE TEST...
#
# open_file_cache max=1000 inactive=20s;
# open_file_cache_errors on;
# open_file_cache_min_uses 2;
# open_file_cache_valid 300s;
server {
listen 127.0.0.1:8080;
access_log off;
# only log critical errors
#error_log /usr/local/nginx/logs/error.log crit;
error_log /dev/null crit;
location / {
root /usr/local/nginx/html;
index index.html;
}
location = /nop.gif {
empty_gif;
}
location /imgs {
autoindex on;
}
}
}
欢迎发表评论-尤其是Nginx专家的评论-基于此完整记录的测试进行讨论。
关于caching - g-wan-重现表演要求，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/19784753/