fcoll/vulcan: add read_all implementation

add an implementation of the read_all operation that uses the two-phase I/O algorithm using even partitioning, i.e. the same base idea that is used by the write_all operation of this component.

In addition to using the 'correct' data partitioning approach for the component, the vulcan read_all implementation also adds some other features that were there for the write_all operations, but not for the (generic) read_all algorithm used by all components so far. Specifically, it can overlap the execution of the I/O phase and the communication phase. The algorithm can also use GPU buffers for aggregation.

Signed-off-by: Edgar Gabriel <[email protected]>

ompi/mca/fcoll/vulcan/Makefile.am

@@ -13,6 +13,7 @@
 # Copyright (c) 2012 Cisco Systems, Inc.  All rights reserved.
 # Copyright (c) 2018      Research Organization for Information Science
 #                         and Technology (RIST).  All rights reserved.
+# Copyright (c) 2024      Advanced Micro Devices, Inc. All rights reserved.
 # $COPYRIGHT$
 #
 # Additional copyrights may follow
@@ -22,6 +23,7 @@
 
 sources = \
         fcoll_vulcan.h \
+        fcoll_vulcan_internal.h \
         fcoll_vulcan_module.c \
         fcoll_vulcan_component.c \
         fcoll_vulcan_file_read_all.c \

ompi/mca/fcoll/vulcan/fcoll_vulcan.h

@@ -14,6 +14,7 @@
  *                         and Technology (RIST). All rights reserved.
  * Copyright (c) 2024      Triad National Security, LLC. All rights
  *                         reserved.
+ * Copyright (c) 2024      Advanced Micro Devices, Inc. All rights reserved.
  * $COPYRIGHT$
  *
  * Additional copyrights may follow

ompi/mca/fcoll/vulcan/fcoll_vulcan_component.c

@@ -16,6 +16,7 @@
  *                         reserved.
  * Copyright (c) 2024      Triad National Security, LLC. All rights
  *                         reserved.
+ * Copyright (c) 2024      Advanced Micro Devices, Inc. All rights reserved.
  * $COPYRIGHT$
  *
  * Additional copyrights may follow