Thanks for the response. I do have control of the code for both applications. The perl code is not sleeping forever - it is a full application.

I'm happy to continue to pass the actual information through a file. What I want to do is simply notify the Perl app that new data is in the file, and then the Perl app would read the file as it normally does. The goal is to reduce that potential 200ms latency by an order of magnitude.

I was hoping there might be some simplier method then setting up socket communication just to generate an interrupt :-) but if you think thats the best fit for what I'm doing I'll look into it.

Thanks!

In reply to Re^2: using $SIG as an IPC interrupt? by bobbob
in thread using $SIG as an IPC interrupt? by bobbob

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.