First of all, you aren't correctly determining the fork fails. If the fork fails, $pid will be undefined. But undef == 0 is a true statement (which will generate a warning, if you have them turned on).

I don't understand the but in couple of seconds, 2 processes exit and remaining 3 processes continue running as normal bit. All the processes are doing are forking, printing, and touching files. I'd expect the entire process, including the children, to be finished within a single second.

Note however that if another user runs this as well, the touch will likely fail (depending on the umask of the original user) - but that shouldn't matter in whether or not the processes fail (and hardly in how fast they are).

In reply to Re: Problem with Parallel Processes by JavaFan
in thread Problem with Parallel Processes by fdegir

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.