Re: [MERGE] branch prediction hints

On 13/10/10 04:47, Kinkie wrote:
> Hi all,
> this patch-let makes implements a GCC feature to hint the branch
> prediction algorithms about the likely outcome of a test. This is useful
> to optimize the case of singleton patterns (e.g.
> CacheManager::GetInstance).
> This implements the likely() and unlikely() macros.
>
> Kinkie

I'm neutral on this.

For now definitely hold the cache_manager.cc change until Alex SMP cache
manager updates are in.

I'm also fairly sure it can be done as a base template class to inherit
from. There are a mix of good and crap examples online. Some are fully
thread-safe.

Amos

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