I am not familiar with how you're remotely accessing your system, but if it's autoflushing your searching for, look no further than the documentation for
$| in
perlvar:
use IO::Handle;
STDOUT->autoflush(1);
(This is documented in perlvar because you can achieve the same effect by setting
$|).
In fact, the blurb seems to apply directly to you, albeit in a more UNIXy context:
If set to nonzero, forces a flush right away and after every write or print on the currently selected output channel. Default is 0 (regardless of whether the channel is really buffered by the system or not; $| tells you only whether you've asked Perl explicitly to flush after each write). STDOUT will typically be line buffered if output is to the terminal and block buffered otherwise. Setting this variable is useful primarily when you are outputting to a pipe or socket, such as when you are running a Perl program under rsh and want to see the output as it's happening. This has no effect on input buffering. See getc in the perlfunc manpage for that. (Mnemonic: when you want your pipes to be piping hot.)
If you have the Perl Cookbook ("Ram"), you can check Recipe 7.12. for an example. Hope this helps.