Hello Alex, Thanks very much for your reply!
Just our of curiosity, what is the use of net.inet.ip.portrange.hifirst and net.inet.ip.portrange.hilast ? Thanks, Long On Tue, 9 Oct 2001, Alex Rousskov wrote: > > Are you running out of ephemeral ports? See net.inet.ip.portrange > sysctl or do your own port management. > > Alex. > > On Tue, 9 Oct 2001, Nguyen-Tuong Long Le wrote: > > > Hi all, > > > > I have a software that simulates web clients and servers to create > > network congestion (for the purpose of doing research in network > > congestion). In our experiment, a client opens an HTTP connection > > to a server, fetches a number of objects, and then closes the > > connection. A problem I seem to have right now is that a client > > machine cannot simulate more than 3000 connections. When my client > > machine simulates more than 3000 connections, it's able to open > > a socket but then connect(2) fails with errno 35 (Resource > > temporarily unavailable). Another interesting notice is that the > > connect(2) system call blocks for a few miliseconds before it > > fails although fcntl(2) was used to make the socket non-blocking. > > The OS version I am using is FreeBSD 4.3-release. > > > > I used sysctl to bump up kern.maxfiles and kern.maxfilesperproc to > > 16384. I also bumped up kern.ipc.somaxconn to 8192 on the server > > side. I recompiled the kernel with option NMBCLUSTERS=65536 to > > increase the number of mbufs. I guess that CPU is not the bottleneck > > since I have the same problem regardless whether I use a 300 MHz or > > a 1 GHz machine. > > > > Does anyone have any suggestion what kind of resources my client machine > > runs out and how I can fix it? > > > > Thanks, > > Long > > > > P.S. Please kindly email your reply to me since I am not on the list. > > > > > > To Unsubscribe: send mail to [EMAIL PROTECTED] > > with "unsubscribe freebsd-net" in the body of the message > > > > To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-net" in the body of the message
