PING³
June 2, 2025 Tobias Burnus wrote:
Tobias Burnus wrote:
PING²
On May 12, 2025, Tobias Burnus wrote:
PING.
There is actually a minor update as meanwhile CUDA 12.8 was
released that added the 'f' suffix and sm_103 and sm_121.
Still, the pattern remains the same; hence, a normal PING.
On April 25, 2025, Tobias Burnus wrote:
The idea of -march-map= is to simply and future proof select the
best -march for a certain arch, without requiring that the compiler
has support for it (like having a special multilib for it) - while
-march= sets the actually used '.target' (and the compiler might
actually generate specialized code for it).
The patch updates the sm_X for the CUDA 12.8 additions, namely for
three Blackwell GPU architectures.
Cf.
https://docs.nvidia.com/cuda/parallel-thread-execution/index.html#release-notes
or also
https://docs.nvidia.com/cuda/cuda-toolkit-release-notes/index.html
OK for mainline?
Tobias
PS: CUDA 12.7 seems to be an internal release, which shows up as
PTX version but was not released to the public.
PTX 8.6/CUDA 12.7 added sm_100/sm_101 - and PTX 8.7/CUDA 12.8 added
sm120.
PPS: sm_80 (Ampere) was added in PTX ISA 7.0 (CUDA 11.0),
sm_89 (Ada) in PTX ISA 7.8 (CUDA).
As sm_90 (Hopper) + sm_100/101/120 (Blackwell) currently/now map to
sm_89, GCC generates PTX ISA .version 7.8 for them.
Otherwise, sm_80 and sm_89 produce (for now) identical code.
