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fs/ufs: change default locking protocol - v4.1.x #12760

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Sep 30, 2024
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fs/ufs: change default locking protocol - v4.1.x #12760

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7 changes: 7 additions & 0 deletions ompi/mca/fs/lustre/fs_lustre.h
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Original file line number Diff line number Diff line change
Expand Up @@ -13,6 +13,7 @@
* Copyright (c) 2015-2018 Research Organization for Information Science
* and Technology (RIST). All rights reserved.
* Copyright (c) 2016-2017 IBM Corporation. All rights reserved.
* Copyright (c) 2024 Advanced Micro Devices, Inc. All rights reserverd.
* $COPYRIGHT$
*
* Additional copyrights may follow
Expand All @@ -31,6 +32,12 @@
extern int mca_fs_lustre_priority;
extern int mca_fs_lustre_stripe_size;
extern int mca_fs_lustre_stripe_width;
extern int mca_fs_lustre_lock_algorithm;

#define FS_LUSTRE_LOCK_AUTO 0
#define FS_LUSTRE_LOCK_NEVER 1
#define FS_LUSTRE_LOCK_ENTIRE_FILE 2
#define FS_LUSTRE_LOCK_RANGES 3

BEGIN_C_DECLS

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11 changes: 11 additions & 0 deletions ompi/mca/fs/lustre/fs_lustre_component.c
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Original file line number Diff line number Diff line change
Expand Up @@ -13,6 +13,7 @@
* Copyright (c) 2008-2011 University of Houston. All rights reserved.
* Copyright (c) 2015 Los Alamos National Security, LLC. All rights
* reserved.
* Copyright (c) 2024 Advanced Micro Devices, Inc. All rights reserverd.
* $COPYRIGHT$
*
* Additional copyrights may follow
Expand Down Expand Up @@ -45,6 +46,7 @@ int mca_fs_lustre_priority = 20;
runtime also*/
int mca_fs_lustre_stripe_size = 0;
int mca_fs_lustre_stripe_width = 0;
int mca_fs_lustre_lock_algorithm = 0; /* auto */
/*
* Instantiate the public struct with all of our public information
* and pointers to our public functions in it
Expand Down Expand Up @@ -93,6 +95,15 @@ lustre_register(void)
MCA_BASE_VAR_TYPE_INT, NULL, 0, 0,
OPAL_INFO_LVL_9,
MCA_BASE_VAR_SCOPE_READONLY, &mca_fs_lustre_stripe_width);
mca_fs_lustre_lock_algorithm = 0;
(void) mca_base_component_var_register(&mca_fs_lustre_component.fsm_version,
"lock_algorithm", "Locking algorithm used by the fs ufs component. "
" 0: auto (default), 1: skip locking, 2: always lock entire file, "
"3: lock only specific ranges",
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If this MCA parameter only accepts specific values, is there any reason not to use the enum MCA type? (such that the MCA base will take care of ensuring that only allowable values are set)

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@jsquyres you are technically correct that we could enum MCA types, this is more a feature of what I am used to doing vs. what is possible. That being said, the same pr has already been merged to 5.0.x as well, do we really want to go back and change that as well? We could still fix it in main branch for future releases.

MCA_BASE_VAR_TYPE_INT, NULL, 0, 0,
OPAL_INFO_LVL_9,
MCA_BASE_VAR_SCOPE_READONLY,
&mca_fs_lustre_lock_algorithm );

return OMPI_SUCCESS;
}
17 changes: 16 additions & 1 deletion ompi/mca/fs/lustre/fs_lustre_file_open.c
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Original file line number Diff line number Diff line change
Expand Up @@ -13,6 +13,7 @@
* Copyright (c) 2015-2020 Research Organization for Information Science
* and Technology (RIST). All rights reserved.
* Copyright (c) 2016-2017 IBM Corporation. All rights reserved.
* Copyright (c) 2024 Advanced Micro Devices, Inc. All rights reserverd.
* $COPYRIGHT$
*
* Additional copyrights may follow
Expand Down Expand Up @@ -171,8 +172,22 @@ mca_fs_lustre_file_open (struct ompi_communicator_t *comm,
fh->f_stripe_size = lump->lmm_stripe_size;
fh->f_stripe_count = lump->lmm_stripe_count;
fh->f_fs_block_size = lump->lmm_stripe_size;
fh->f_flags |= OMPIO_LOCK_NEVER;
free(lump);

if (FS_LUSTRE_LOCK_AUTO == mca_fs_lustre_lock_algorithm ||
FS_LUSTRE_LOCK_NEVER == mca_fs_lustre_lock_algorithm ) {
fh->f_flags |= OMPIO_LOCK_NEVER;
}
else if (FS_LUSTRE_LOCK_ENTIRE_FILE == mca_fs_lustre_lock_algorithm) {
fh->f_flags |= OMPIO_LOCK_ENTIRE_FILE;
}
else if (FS_LUSTRE_LOCK_RANGES == mca_fs_lustre_lock_algorithm) {
/* Nothing to be done. This is what the posix fbtl component would do
anyway without additional information . */
}
else {
opal_output ( 1, "Invalid value for mca_fs_lustre_lock_algorithm %d", mca_fs_lustre_lock_algorithm );
}

return OMPI_SUCCESS;
}
7 changes: 1 addition & 6 deletions ompi/mca/fs/ufs/fs_ufs_file_open.c
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Original file line number Diff line number Diff line change
Expand Up @@ -13,6 +13,7 @@
* Copyright (c) 2015-2018 Research Organization for Information Science
* and Technology (RIST). All rights reserved.
* Copyright (c) 2016-2017 IBM Corporation. All rights reserved.
* Copyright (c) 2024 Advanced Micro Devices, Inc. All rights reserverd.
* $COPYRIGHT$
*
* Additional copyrights may follow
Expand Down Expand Up @@ -105,12 +106,6 @@ mca_fs_ufs_file_open (struct ompi_communicator_t *comm,
component. */
fh->f_flags |= OMPIO_LOCK_ENTIRE_FILE;
}
else {
fh->f_flags |= OMPIO_LOCK_NEVER;
}
}
else {
fh->f_flags |= OMPIO_LOCK_NEVER;
}
free (fstype);
}
Expand Down
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