Re: [Boost-users] Thread local storage

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.