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Subject: Re: [Boost-users] Thread local storage
From: Peter Dimov (pdimov_at_[hidden])
Date: 2009-03-29 13:36:34

Oliver Abert:
> Hi Everyone,
> I am using Boost Threads (1.38) as threading library and I also use the
> thread_specific_ptr to store a minor amount of data per thread (I think
> currently it is like 5 different pointer values per thread). Technically
> everything works out fine, but I am having a performance problem on Mac
> OS X. On Linux the performance is 10 times faster than on Mac OS. If I
> use pthreads on Mac OS I have identical performance to the Linux version.
> Both versions are running on the same machine using 8 threads both.

What does your profiler say?

> Is there any known problem with shared pointers on Mac OS?

shared_ptr should use the same code on both platforms, either
sp_counted_base_gcc_x86.hpp or sp_counted_base_gcc_ppc.hpp, depending on
whether your CPU is Intel or PowerPC; see boost/detail/sp_counted_base.hpp.
There is no Mac OS-specific path.

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