From 2c009a3226a6afc0dfa031722d30fff0dd0bd487 Mon Sep 17 00:00:00 2001
From: Andrew Gaspar <agaspar@lanl.gov>
Date: Mon, 11 May 2020 11:33:34 -0600
Subject: Map the spack skylake arch to Kokkos BDW, rather than SKX (#16583)
SKX includes AVX-512 extensions that consumer Skylake processors do
not have. Therefore, map Skylake to the prior arch to work on
these systems. Skylake-X processors will still map as the
skylake_avx512 spack arch and get the correct optimzations.
---
var/spack/repos/builtin/packages/kokkos/package.py | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
(limited to 'var')
diff --git a/var/spack/repos/builtin/packages/kokkos/package.py b/var/spack/repos/builtin/packages/kokkos/package.py
index fef37d2ac7..b5277e40a8 100644
--- a/var/spack/repos/builtin/packages/kokkos/package.py
+++ b/var/spack/repos/builtin/packages/kokkos/package.py
@@ -120,7 +120,12 @@ class Kokkos(CMakePackage, CudaPackage):
"core2": None,
"ivybridge": "SNB",
"broadwell": "BDW",
- "skylake": "SKX",
+ # @AndrewGaspar: Kokkos does not have an arch for plain-skylake - only
+ # for Skylake-X (i.e. Xeon). For now, I'm mapping this to Broadwell
+ # until Kokkos learns to optimize for SkyLake without the AVX-512
+ # extensions. SkyLake with AVX-512 will still be optimized using the
+ # separate `skylake_avx512` arch.
+ "skylake": "BDW",
"icelake": "SKX",
"skylake_avx512": "SKX",
}
--
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