https://gcc.gnu.org/g:c80ecfa0927a1ada31864c709220a2adb7c96662
commit r15-5961-gc80ecfa0927a1ada31864c709220a2adb7c96662
Author: Thomas Schwinge <tschwi...@baylibre.com>
Date: Tue Nov 12 09:54:35 2024 +0100
Clarify libgomp nvptx 'omp_low_lat_mem_space' documentation
PTX '%dynamic_smem_size' was "Introduced in PTX ISA version 4.1", and
"Requires 'sm_20' or higher". Given that GCC/nvptx generally supports
'sm_20', only the PTX ISA version matters here, and that's all fine if
just using GCC's defaults. Follow-up to
commit e9a19ead498fcc89186b724c6e76854f7751a89b
"openmp, nvptx: low-lat memory access traits".
libgomp/
* libgomp.texi: Clarify nvptx 'omp_low_lat_mem_space'
documentation.
Diff:
---
libgomp/libgomp.texi | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/libgomp/libgomp.texi b/libgomp/libgomp.texi
index 453c35679077..6b8000c696f6 100644
--- a/libgomp/libgomp.texi
+++ b/libgomp/libgomp.texi
@@ -6972,8 +6972,10 @@ The implementation remark:
memory-copy functions of the CUDA library. Higher dimensions will
call those functions in a loop and are therefore supported.
@item Low-latency memory (@code{omp_low_lat_mem_space}) is supported when the
- the @code{access} trait is set to @code{cgroup}, the ISA is at least
- @code{sm_53}, and the PTX version is at least 4.1. The default pool size
+ the @code{access} trait is set to @code{cgroup}, and libgomp has
+ been built for PTX ISA version 4.1 or higher (such as in GCC's
+ default configuration). @c -mptx=4.1
+ The default pool size
is 8 kiB per team, but may be adjusted at runtime by setting environment
variable @code{GOMP_NVPTX_LOWLAT_POOL=@var{bytes}}. The maximum value is
limited by the available hardware, and care should be taken that the
