Date: 2008-04-21 09:28:48
>> Another interesting tidbit is that if I move the focus from the cmd
>> window in which the test is running, it completes. Go figure.
>Priority inversion? I think that Windows boosts the priority of threads
(I thought whole processes actually)
>which have a focused window.
Since this only happens on a SMP, then it is not likely priority
inversion. More likely it is a barrier problem. It would be intersting
to run the same test on the same hardware using MinGW or Cygwin, and see
if you get the same behavior.
[mailto:boost-bounces_at_[hidden]] On Behalf Of Giovanni Piero
Sent: Monday, April 21, 2008 9:10 AM
Subject: Re: [boost] shared_mutex deadlocks?
On Mon, Apr 21, 2008 at 2:51 PM, Peter Dimov <pdimov_at_[hidden]> wrote:
> >> How often, on what platform?
> > Every time, on a dual core Pentium D running XP64. The program is
> compiled > as 32 bit with MSVC 7.1. It looks like a livelock rather
> than a deadlock, > since the program keeps spinning its wheels at
100% but never completes.
> > The writer thread is probably either blocked or starved. This
> happens on > another (quad core) machine too for which I don't know
> the specs at the > moment.
> The other box is XP32 w/ Q6600.
> Another interesting tidbit is that if I move the focus from the cmd
> window in which the test is running, it completes. Go figure.
Priority inversion? I think that Windows boosts the priority of threads
(I thought whole processes actually) which have a focused window.
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