Beefy Boxes and Bandwidth Generously Provided by pair Networks
Pathologically Eclectic Rubbish Lister

Comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
.... regardless of BrowserUk's belief that threads, especially Perl threads, will give you some sort of performance boost ..... try it yourself and see, .....huge overheads

....maybe they do in MSWindows....but not under linux...and frankly, i would not use an OS that let a process running on one core of a multi-core system, alter the goings on in a neighboring core..... that is what you seem to be suggesting...... i could start a perl script, start x number of threads, and be assured that each thread (code block) will be assigned to a separate core..... with cross-core variable sharing thru threads::shared? .....bad design......

on linux, each thread of a spawned thread set shares the same pid, and if you call exit from any thread, it takes down all threads under the master thread, including the master thread.... what more evidence do you need that they share the same pid?... and probably have their nice level set as a whole based on the master thread's pid even though in theory, BrowserUk's assertion that Perl threads will give you concurrent processing... in all likelihood, they won't..... i would bet for security, a pid gets spawned into 1 core, and since threads on linux share the same master pid, all threads probably will be assigned to the same core.... otherwise it would be chaos as programs try to spawn threads into other cores..... maybe it is done in sloppy OS's ?..... but not to abandon the intent of my reply..... threads are good if you want easy realtime sharing of data between threads..... but they are not for speed

...what you want to look at is forking and using shared memory segments for the best speed.... read "perldoc perlipc" and look for the section SysV IPC.... it is the fastest

.... and that is no baloney...i'm a vegetarian ;-)

I'm not really a human, but I play one on earth.
Old Perl Programmer Haiku

In reply to Re: Standard way to convert timezone in multithreaded script by zentara
in thread Standard way to convert timezone in multithreaded script by whale2

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, 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, 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.
  • Log In?

    What's my password?
    Create A New User
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others wandering the Monastery: (2)
    As of 2018-08-19 05:20 GMT
    Find Nodes?
      Voting Booth?
      Asked to put a square peg in a round hole, I would:

      Results (186 votes). Check out past polls.