[nio-devel] stressing nio-httpd

[Nonny Mouse]

Hi,

I've been trying to stress the system a bit and i've come up against some
issues, if anyone can shed light on them that'd be great...

I patched my local to add errno via sb-alien:get-errno, but couldn't find a
decent portable solution.

----------------------------------------
case 1

Using
/usr/sbin/ab2 -n 500000 -c 1000  http://localhost:16323/

Completed 300000 requests
apr_recv: Connection timed out (110)
Total of 312165 requests completed

meanwhile theres not a peep from the server

Starting server on "127.0.0.1" port 16323.. (socket fd is 7)
waiting for events..

There are about 30k conns in the TIME_WAIT state

about a minute or two later we get:

poll-error occurred: 4 (EINTR)
Poll-error, exiting..
0

--------------------------------------------------
case 2

/usr/sbin/ab2 -n 500000 -c 1000  http://localhost:31273/
This is ApacheBench, Version 2.0.41-dev <$Revision: 1.141 $> apache-2.0
Copyright (c) 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Copyright (c) 1998-2002 The Apache Software Foundation,
http://www.apache.org/

Benchmarking localhost (be patient)
Completed 50000 requests
Completed 100000 requests
Completed 150000 requests
Completed 200000 requests
Completed 250000 requests
Completed 300000 requests
apr_recv: Connection reset by peer (104)
Total of 329682 requests completed
:~/projects/svn$ wget http://localhost:31273/
--18:00:12--  http://localhost:31273/
           => `index.html.2'
Resolving localhost... 127.0.0.1
Connecting to localhost|127.0.0.1|:31273... connected.
HTTP request sent, awaiting response...

server:
Starting server on "127.0.0.1" port 31273.. (socket fd is 8)
waiting for events..

dump:
18:00:06.186009 IP localhost.31273 > localhost.44651: R
3993753736:3993753736(0) win 0
18:00:06.186014 IP localhost.31273 > localhost.44652: R
3990078422:3990078422(0) win 0
18:00:06.186018 IP localhost.31273 > localhost.44654: R
3993968120:3993968120(0) win 0
18:00:06.186682 IP localhost.59428 > localhost.31273: P 1:91(90) ack 1 win
8192 <nop,nop,timestamp 6481025 6481025>
18:00:06.186688 IP localhost.31273 > localhost.59428: . ack 91 win 8192
<nop,nop,timestamp 6481025 6481025>
18:00:06.186704 IP localhost.35785 > localhost.31273: F 91:91(0) ack 331 win
8192 <nop,nop,timestamp 6481025 6481024>
18:00:06.186710 IP localhost.31273 > localhost.35785: . ack 92 win 8192
<nop,nop,timestamp 6481025 6481025>
18:00:06.186739 IP localhost.35795 > localhost.31273: S
4233400977:4233400977(0) win 32767 <mss 16396,sackOK,timestamp 6481025
0,nop,wscale 2>
18:00:06.186748 IP localhost.31273 > localhost.35795: S
3999548339:3999548339(0) ack 4233400978 win 32767 <mss
16396,sackOK,timestamp 6481025 6481025,nop,wscale 2>
18:00:06.186755 IP localhost.35795 > localhost.31273: . ack 1 win 8192
<nop,nop,timestamp 6481025 6481025>
18:00:06.187104 IP localhost.31273 > localhost.35788: P 1:330(329) ack 91
win 8192 <nop,nop,timestamp 6481025 6481024>
18:00:06.187111 IP localhost.35788 > localhost.31273: . ack 330 win 8192
<nop,nop,timestamp 6481025 6481025>
18:00:06.187119 IP localhost.31273 > localhost.35788: F 330:330(0) ack 91
win 8192 <nop,nop,timestamp 6481025 6481025>
18:00:06.187148 IP localhost.35794 > localhost.31273: P 1:91(90) ack 1 win
8192 <nop,nop,timestamp 6481025 6481024>
18:00:06.187155 IP localhost.31273 > localhost.35794: . ack 91 win 8192
<nop,nop,timestamp 6481025 6481025>
18:00:06.187570 IP localhost.35795 > localhost.31273: F 1:1(0) ack 1 win
8192 <nop,nop,timestamp 6481025 6481025>

----------------------------------------------------
case 3

Tried tracking epoll_ctl returns in add-fd and getting EEXISTS for what
looks like every connection.

----------------------------------------------------

Any help appreciated

Cheers,

Paul.
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