On Wed, 10 Oct 2001, Nguyen-Tuong Long Le wrote:
> Just our of curiosity, what is the use of
> net.inet.ip.portrange.hifirst and net.inet.ip.portrange.hilast ?
Even FreeBSD gurus/committers are unsure :-)
http://people.freebsd.org/~adrian/sysctl.descriptions
The answer is in "man ip".
Alex.
> 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
> > >
> >
> >
>
>
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