Hi Miller

In fact I had the same problem even when I ran both server and client on the same Windows98 machine.

I have looked a bit deeper into this now and found solutions.

I think the solution would be to set the TCP_NODELAY to 1 and to set SO_RCVBUF and SO_SNDBUF to 0.

In x_net.c something has to be added around this code segment.

#ifdef IRIX /* this seems to work only in IRIX but is unnecessary in Linux. Not sure what NT needs in place of this. */ if (setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, 0, 0) < 0) post("setsockopt failed\n"); #endif

Set int i=0; int one=1; setsockopt(sockfd, SOL_SOCKET, SO_RCVBUF, &i, sizeof(i)); setsockopt(sockfd, IPPROTO_TCP, TCP_NODELAY, &one, sizeof(one));

As far as I can see you should use these settings on all platforms. You should probably also set setsockopt(sockfd, SOL_SOCKET, SO_SNDBUF, &i, sizeof(i)); on the sending socket (but it should have the same effect as TCP_NODELAY. However if there is another application except PD at the receiver then this setting would have an effect.)

The SO_SNDBUF and SO_RCVBUF sets the kernel buffer to 0 which means all data gets immediately sent to network or fed into the application. This should also fix any delay on a UDP socket.

David

Miller Puckette wrote:

hi David,

I've noticed that Windows seems only to deliver TCP packets around 5 times per second (between machines; not on a single machine which runs with lower latency.) I've never known what to do about this... Where do I feed teh TCP_NOWAIT flag?

cheers Miller O On Mon, Mar 04, 2002 at 04:43:20PM +0100, David Jonsson (II) wrote:

...

I run PD 0.43-4

The TCP server socket implementation in Windows PD should have the option TCP_NOWAIT so that data gets sent immediately when it arrives in the buffer.

This is the case in the Linux version.

Today I write like 15 times per second to the net and the Linux version receives this fast but the Windows version only produces a output approximately 5 times per second.

I'm not an expert on sockets but I suppose this is what differs? Maybe I should add that I run Windows 98 on the client.

Sounds good... I'll stick it in.

cheers Miller

On Mon, Jun 24, 2002 at 08:58:46AM +0200, David Jonsson (II) wrote:

Hi again

This is not a major issue but I se that you feed the TCP_NODELAY even when using a UDP sockets. The TCP_NODELAY has no effect under UDP and should be avoided to aviod the error-message.

David