From b88ec729bc5933ef1412e1291d26c34ce86448b9 Mon Sep 17 00:00:00 2001
From: Mathieu Faverge <mathieu.faverge@inria.fr>
Date: Thu, 19 Jan 2023 17:11:19 +0100
Subject: [PATCH] runtime/starpu: add a warning if parallel workers are
initialized without multi-threaded BLAS library
---
include/chameleon/config.h.in | 3 +++
runtime/starpu/control/runtime_control.c | 5 ++++-
2 files changed, 7 insertions(+), 1 deletion(-)
diff --git a/include/chameleon/config.h.in b/include/chameleon/config.h.in
index a284fd2fd..2b02d4bf4 100644
--- a/include/chameleon/config.h.in
+++ b/include/chameleon/config.h.in
@@ -37,6 +37,9 @@
/* Debug coreblas execution order if not provided by the runtime */
#cmakedefine CHAMELEON_KERNELS_TRACE
+/* Enable multi-threaded BLAS library */
+#cmakedefine CHAMELEON_KERNELS_MT
+
/* Communication engine */
#cmakedefine CHAMELEON_USE_MPI
#cmakedefine CHAMELEON_USE_MIGRATE
diff --git a/runtime/starpu/control/runtime_control.c b/runtime/starpu/control/runtime_control.c
index 72654d32f..5a36b8a6f 100644
--- a/runtime/starpu/control/runtime_control.c
+++ b/runtime/starpu/control/runtime_control.c
@@ -38,7 +38,6 @@ void chameleon_starpu_parallel_worker_init( starpu_sched_opt_t *sched_opt )
if (env_pw_level != NULL) {
struct starpu_parallel_worker_config *pw_config = NULL;
-
hwloc_obj_type_t pw_level;
int pw_level_number = 1;
char level[256];
@@ -46,6 +45,10 @@ void chameleon_starpu_parallel_worker_init( starpu_sched_opt_t *sched_opt )
int argc = strchr( env_pw_level, ':') == NULL ? 1 : 2;
int match = sscanf( env_pw_level, "%[^:]:%d", level, &pw_level_number );
+#if !defined(CHAMELEON_KERNELS_MT)
+ chameleon_warning("chameleon_starpu_parallel_worker_init()", "CHAMELEON has been compiled with multi-threaded kernels disabled (-DCHAMELEON_KERNELS_MT=OFF). This won't break the execution, but you may not obtain the performance gain expected. It is recommended to recompile with -DCHAMELEON_KERNELS_MT=ON.\n");
+#endif
+
if ( (match != argc) ||
((match == 2) && (pw_level_number < 0) ) )
{
--
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