On 7/4/05, Markus Friedl <[EMAIL PROTECTED]> wrote: > On Mon, Jul 04, 2005 at 04:31:43PM -0400, Adam wrote: > > I used http_load to test out lighttpd's performance (both installed > > from ports), and noticed that sometimes connect takes 6 seconds:
I'm seeing similar problems with 'http_load'; any suggestions for a workaround? If I run http_load with a high value for '-parallel' or several tests in close succession, the process starts to print "No route to host" warnings, from perror() after a failed call to connect(2). I also found a small bug in the proxy client code, easily fixed. > the TCP client reuses a source port and sends a SYN while the > server still has the old TIME_WAIT state, so the server does not > send a SYN/ACK. > > after 6 seconds the client retransmits the SYN and the connect > succeeds. > > so there are 2 problems: > 1) the client reuses the port too soon. > 2) the server could accept the SYN during > TIME_WAIT (it did in the old days, but because > tcp clients now use random ISS the server only > accepts 50% of SYNs in TIME_WAIT). I spent some time hunting for a way to reduce the duration of TIME_WAIT state under OpenBSD 3.7, with no luck. I suppose the next possibility to look at is how to keep the client from reusing the port too soon?
