Re: Gtk2 ....needs thread testing on a multi-threaded computer

I've got this on the first run:

panic: attempt to copy freed scalar 296b060 to 1511250 at gtkthreadtes
+t.pl line 188.
Segmentation fault
[download]

I didn't see anything abnormal since that.

By the way, is this what they call a race condition?

Comment on Re: Gtk2 ....needs thread testing on a multi-threaded computer Download Code

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Re^2: Gtk2 ....needs thread testing on a multi-threaded computer by zentara (Cardinal) on Dec 16, 2009 at 14:34 UTC
*By the way, is this what they call a race condition* .....oooh i think i see the problem..... i thought $finish was the only var where locking was needed, but the main thread also resets $track{$tr}{'tot'} ...... each thread writes to it's own, but main resets them to zero ....on a single cpu machine it appears to work, probably because of its linear timing ....thanks for the report...i will have to think about how to handle locking $track{$tr}{'tot'} if you could give a quick try at line 188 `lock $track{$tr}{'tot'}; $track{$tr}{'tot'} += (rand 5) + $whip;` [download] I'm not really a human, but I play one on earth. Old Perl Programmer Haiku	[reply] [d/l]
Re^3: Gtk2 ....needs thread testing on a multi-threaded computer by kikuchiyo (Hermit) on Dec 16, 2009 at 19:12 UTC
I tried the fixed version - no segfaults this time, nor any other sign of incorrect behavior.	[reply]
Re^4: Gtk2 ....needs thread testing on a multi-threaded computer by zentara (Cardinal) on Dec 17, 2009 at 13:05 UTC
... hi, i just updated the script to lock all shared variables.... now the question is... are they locked properly for a multicpu motherboard?..... walmart had a multicore toshiba laptop for 399 awhile ago..... i should have grabbed one..... but they seem to get cheaper every year..... so no sweat :-) ..... thanks for testing it I'm not really a human, but I play one on earth. Old Perl Programmer Haiku	[reply]