Re: [lwip-users] lwip_write() blocks indefinitely

[Alhad Palkar]

Would changing any of these have any bearing on the problem I am seeing

#define PBUF_POOL_SIZE                  32

#define PBUF_POOL_BUFSIZE               (4 * 1024)

#define MEMP_NUM_TCPIP_MSG_INPKT        1024

Increasing the PBUF_POOL_SIZE seems to make it better.

Thanks,

Alhad

On Mon, Nov 2, 2015 at 10:08 AM, Alhad Palkar <address@hidden> wrote:

Thanks Darius. Can you explain what you mean by output driver overrun? Does it mean my output driver is filling up LWIP buffers? 

I have an arm processor; using ThreadX as our RTOS and LWIP for our networks stack. I have written my own wifi driver based on the WICED wifi driver. 

Thanks,

Alhad

On Sun, Nov 1, 2015 at 9:46 PM, Darius Babrauskas <address@hidden> wrote:

Hi Alhad,

 

Maybe one reason.

Output driver overrun- packet are sending, but second packet overrun first.

Try do test with delay:

while(1) {
    lwip_write();

    delay(10ms);
}

 

Please, write about your system-hardware.

Darius

 

From: Alhad Palkar

Sent: Saturday, October 31, 2015 2:34 AM

To: Mailing list for lwIP users

Subject: Re: [lwip-users] lwip_write() blocks indefinitely

 

Any reason why this would happen?

 

On Fri, Oct 16, 2015 at 2:23 PM, alhadpalkar <address@hidden> wrote:

Hi,

I am using LWIP 1.4.1 and we are seeing a situation where lwip_write()
blocks indefinitely.

We are using a tcp socket, connecting to a remote socket. and then calling
lip_write over and over.

lwip_socket();
lwip_connect()
while(1) {
    lwip_write();
}

The server is the netcat command running on a mac host.

In what situation would something like this happen?
Would this result because of improper configs in our lwipopts.h file?
Is there a cap on the size of the data buffer being passed to lwip_write?

Thanks,
Alhad





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