Boost Users :
Subject: Re: [Boost-users] fast_pool_allocator question
From: Brad Howes (bradley.howes_at_[hidden])
Date: 2011-06-14 10:41:02
On Jun 14, 2011, at 1:17 PM, steviekm3 wrote:
> I was wondering if fast_pool_allocator will speed something up.
> I have a funtion say g which looks like:
> void g( Params p )
> std::map<double,Foo> m;
> for( int i = 0; i < 100000; ++it )
> m.insert( ... )
> g gets called from about 100 different threads running on 16 processor
> machine. All the processors are not being used near full capacity. I did
> some analysis and find that most of the time one thread is in malloc system
> call and other threads are blocking on it. ( I guess malloc only allows
> serial access a certain points ).
> Would a fast_pool_allocator speed this up. Could I pre-allocate the memory
> needed using a fast_pool_allocator ? I don't want the pool to return
> memory to the system. Just to reuse memory that is no longer needed ( reuse
> memory that m has used after m goes out of scope ).
I had great success using pool allocators. But you would definitely win if you could have a pool / thread rather than a shared pool.
-- Brad Howes Calling Team - Skype Prague Skype: br.howes
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