gulden:

I've done plenty of multi-threaded code in C++, but never in Perl, so take this with a grain of salt.

I suspect that RMGir is right: Since $tmp seems to be shared amongst all the threads, perl may be wrapping reads/writes to it with a mutex, and you may just have a lot of mutex lock contentions on it. If I understand perl well enough (and I likely don't), then I suspect that moving the my $tmp into the body of the first for loop may resolve the problem: that way, each thread should(?) have it's own copy of $tmp.

...roboticus

In reply to Re: Solaris + UltraSparc T2 + Threads: Avoid LCK's by roboticus
in thread Solaris + UltraSparc T2 + Threads: Avoid LCK's by gulden

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.