[Bf-committers] How much ram is needed for compiling cuda kernels ?

[trouble daemon]

oops, I meant the ncurses version of cmake-gui, not cmake-menu :)

On Fri, Apr 19, 2013 at 8:49 AM, trouble daemon <troubledaemon at gmail.com> wrote:
> Hi Marko,
>
> I use ccmake (the ncurses version of cmake-menu) here in Linux. For my
> cuda compiling, I generally leave WITH_CYCLES_CUDA_BINARIES set to
> OFF, which has the effect of delaying building of the cuda kernel
> until I actually run blender and enable cycles for the first time.
> After the first run, this should have the effect of only comping the
> cuda that is actually needed for your system.
>
> If you would rather build your kernel during compile instead, set that
> above line to ON, and then in advanced settings, change
> CYCLES_CUDA_BINARIES_ARCH to sm_21 only (the newer default is:
> "sm_20;sm_21;sm_30" for me atm, but I think it had sm_13 in there
> until recently).
>
> Hope this helps, gl o/
>
>
> Dan
>
> On Fri, Apr 19, 2013 at 8:31 AM, Marko Radojcic <sambucuself at gmail.com> wrote:
>> Thanks. This is the answer I was looking for.
>>
>> My GT 430 has 2.1 compute capability so 1.3 is not needed for me, and
>> apparently I didn't force the sm_21 value properly.
>>
>> What shoud I edit to force compiling only 2.1 cuda kernel ?
>> I obviously didn't properly understand the wiki page explaining it ...
>>
>> I am using cmake, but I can work with scons if the setting is easier to
>> achieve...
>>
>>
>>
>>
>>> We dropped official support for sm 1.3, partly because it is so
>>> difficult to compile for. Which build system are you using? Perhaps
>>> this is not properly configured.
>>>
>>> > How much RAM is required to build the kernels? - that is my main
>>> question.
>>> >
>>> > Is 2.5GB limit within the OS or the build environment ?
>>> >
>>> > I'm using gcc 4.6.2 and CUDA 5.0
>>>
>>> I don't know the number, it changes each time we add more features.
>>> For sm 2.x or newer RAM usage is a lot lower than sm 1.3 so I suggest
>>> just trying to find out how to configure things to avoid the issue, as
>>> building sm 1.3 on 32 bit is something we don't support anymore.
>>>
>>> Brecht.
>>>
>>>
>>>
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