program 'hangs' when running several instances of program for writing to a file...

["Hilda Klasky" <hklasky@mcdc.panasonic.com>]

Hi Everyone, I hope some one could help me please.

I am using:

Red Hat 9.0
Kernel 2.4.20-8
gcc 3.2.2

My program writes to a file 25K of data every 25 milliseconds. It optionally
flushes the buffer as specified by the user on the entry parameters.

The problem I have is that, when I attempt to run two instances of the
program, (each one writes to a different file); one of the process 'hangs'
(stops writing to the file), when I select the flush option to be on.

When I select the flush option to be off, and I run more than 2 instances of
the program, one of the process 'hangs' also.

I wonder if some how I am over loading some buffer.
I will appreciate your help. Thank you very much in advance.

The core of my code follows:

for (i=0;i<4000;i++){
         //get the time
         t1=microseconds();
         //write the block of data
         of.write(buffer, (unsigned int) read_size);

         if (flush){
             of.flush();
         }//flush

         //get the time again
         t2=microseconds();

         //sleep time:
         long int sleept = floor( ((t1+d)-t2)*1000);
         usleep( sleept );
         //end of sleep time

      }//for i=1 to ..