[Lazarus] semaphores

[Lukasz Sokol]

On 09/02/2012 13:39, Helmut Hartl wrote:
> Am 09.02.12 13:18, schrieb Lukasz Sokol:
>> On 09/02/2012 11:18, Mark Morgan Lloyd wrote:
>>> Lukasz Sokol wrote:
>>>> On 09/02/2012 10:01, Sven Barth wrote:
>>>>
>>>>> The memory that is used by CPU caches is the fastest (but also
>>>>> the most expensive that's why it's only used for the relatively
>>>>> small caches).
>>>>>
>>>>> Regards, Sven
>>>>>
>>>> Is there a way for a non-kernel-developer or plain FPC/Laz user to
>>>> control what is stored in cpu cache ? I thought cache management is
>>>> done transparently to userspace...?
>>> Only on IA-64 ("Itanic") as far as I know, and in any case for
>>> prefetches etc. to be effective the application code would have to be
>>> intimately familiar with the details of the hardware implementation.
>>> It's the sort of thing that would be a compile-time option on a Cray
>>> :-)
>>>
>> Thought so ;) (disclaimer : I read lkml sometimes stumbling upon devs
>> reordering paddings in structures to make them fit into cachelines)
>>
>> L.
>>
>>
> One of the best text (IMHO) you can read about what you can influence is:
> Ulrich Drepper's "What every programmer should know about memory"
> 
> Helmut
> 
Yeah, read that.
Very good text.
Lukasz