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OpenMP: Add get_device_from_uid/omp_get_uid_from_device routines

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Those TR13/OpenMP 6.0 routines permit a reproducible offloading to
a specific device by mapping an OpenMP device number to a
unique ID (UID). The GPU device UIDs should be universally unique,
the one for the host is not.

gcc/ChangeLog:

	* omp-general.cc (omp_runtime_api_procname): Add
	get_device_from_uid and omp_get_uid_from_device routines.

include/ChangeLog:

	* cuda/cuda.h (cuDeviceGetUuid): Declare.
	(cuDeviceGetUuid_v2): Add prototype.

libgomp/ChangeLog:

	* config/gcn/target.c (omp_get_uid_from_device,
	omp_get_device_from_uid): Add stub implementation.
	* config/nvptx/target.c (omp_get_uid_from_device,
	omp_get_device_from_uid): Likewise.
	* fortran.c (omp_get_uid_from_device_,
	omp_get_uid_from_device_8_): New functions.
	* libgomp-plugin.h (GOMP_OFFLOAD_get_uid): Add prototype.
	* libgomp.h (struct gomp_device_descr): Add 'uid' and 'get_uid_func'.
	* libgomp.map (GOMP_6.0): New, includind the new UID routines.
	* libgomp.texi (OpenMP Technical Report 13): Mark UID routines as 'Y'.
	(Device Information Routines): Document new UID routines.
	(Offload-Target Specifics): Document UID format.
	* omp.h.in (omp_get_device_from_uid, omp_get_uid_from_device):
	New prototype.
	* omp_lib.f90.in (omp_get_device_from_uid, omp_get_uid_from_device):
	New interface.
	* omp_lib.h.in: Likewise.
	* plugin/cuda-lib.def: Add cuDeviceGetUuid and cuDeviceGetUuid_v2 via
	CUDA_ONE_CALL_MAYBE_NULL.
	* plugin/plugin-gcn.c (GOMP_OFFLOAD_get_uid): New.
	* plugin/plugin-nvptx.c (GOMP_OFFLOAD_get_uid): New.
	* target.c (str_omp_initial_device): New static var.
	(STR_OMP_DEV_PREFIX): Define.
	(gomp_get_uid_for_device, omp_get_uid_from_device,
	omp_get_device_from_uid): New.
	(gomp_load_plugin_for_device): DLSYM_OPT the function 'get_uid'.
	(gomp_target_init): Set the device's 'uid' field to NULL.
	* testsuite/libgomp.c/device_uid.c: New test.
	* testsuite/libgomp.fortran/device_uid.f90: New test.
This commit is contained in:
Tobias Burnus 2024-09-20 09:25:33 +02:00
parent 0be3f4546f
commit bf4a5efa80
18 changed files with 384 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
gcc/omp-general.cc
View File

@ -3260,6 +3260,7 @@ omp_runtime_api_procname (const char *name)
"alloc",
"calloc",
"free",
"get_device_from_uid",
"get_interop_int",
"get_interop_ptr",
"get_mapped_ptr",
@ -3338,12 +3339,13 @@ omp_runtime_api_procname (const char *name)
as DECL_NAME only omp_* and omp_*_8 appear. */
"display_env",
"get_ancestor_thread_num",
"init_allocator",
"omp_get_uid_from_device",
"get_partition_place_nums",
"get_place_num_procs",
"get_place_proc_ids",
"get_schedule",
"get_team_size",
"init_allocator",
"set_default_device",
"set_dynamic",
"set_max_active_levels",

7
include/cuda/cuda.h
View File

@ -201,6 +201,10 @@ typedef struct {
size_t WidthInBytes, Height, Depth;
} CUDA_MEMCPY3D_PEER;
typedef struct {
char bytes[16];
} CUuuid;
#define cuCtxCreate cuCtxCreate_v2
CUresult cuCtxCreate (CUcontext *, unsigned, CUdevice);
#define cuCtxDestroy cuCtxDestroy_v2
@ -214,6 +218,9 @@ CUresult cuCtxPushCurrent (CUcontext);
CUresult cuCtxSynchronize (void);
CUresult cuCtxSetLimit (CUlimit, size_t);
CUresult cuDeviceGet (CUdevice *, int);
/* _v2 was added in CUDA 11.4 and 'will supplant' the old one in 12.0. */
CUresult cuDeviceGetUuid (CUuuid*, CUdevice);
CUresult cuDeviceGetUuid_v2 (CUuuid*, CUdevice);
#define cuDeviceTotalMem cuDeviceTotalMem_v2
CUresult cuDeviceTotalMem (size_t *, CUdevice);
CUresult cuDeviceGetAttribute (int *, CUdevice_attribute, CUdevice);

14
libgomp/config/gcn/target.c
View File

@ -283,6 +283,18 @@ omp_get_interop_rc_desc (const omp_interop_t interop __attribute__ ((unused)),
return rc_strings[omp_irc_no_value - ret_code];
}
const char *
omp_get_uid_from_device (int device_num __attribute__ ((unused)))
{
return NULL;
}
int
omp_get_device_from_uid (const char *uid __attribute__ ((unused)))
{
return omp_invalid_device;
}
ialias (omp_get_num_interop_properties)
ialias (omp_get_interop_int)
ialias (omp_get_interop_ptr)
@ -290,3 +302,5 @@ ialias (omp_get_interop_str)
ialias (omp_get_interop_name)
ialias (omp_get_interop_type_desc)
ialias (omp_get_interop_rc_desc)
ialias (omp_get_uid_from_device)
ialias (omp_get_device_from_uid)

14
libgomp/config/nvptx/target.c
View File

@ -295,6 +295,18 @@ omp_get_interop_rc_desc (const omp_interop_t interop __attribute__ ((unused)),
return rc_strings[omp_irc_no_value - ret_code];
}
const char *
omp_get_uid_from_device (int device_num __attribute__ ((unused)))
{
return NULL;
}
int
omp_get_device_from_uid (const char *uid __attribute__ ((unused)))
{
return omp_invalid_device;
}
ialias (omp_get_num_interop_properties)
ialias (omp_get_interop_int)
ialias (omp_get_interop_ptr)
@ -302,3 +314,5 @@ ialias (omp_get_interop_str)
ialias (omp_get_interop_name)
ialias (omp_get_interop_type_desc)
ialias (omp_get_interop_rc_desc)
ialias (omp_get_uid_from_device)
ialias (omp_get_device_from_uid)

15
libgomp/fortran.c
View File

@ -834,6 +834,21 @@ omp_get_interop_rc_desc_ (const char **res, size_t *res_len,
*res_len = *res ? strlen (*res) : 0;
}
void
omp_get_uid_from_device_ (const char **res, size_t *res_len,
int32_t device_num)
{
*res = omp_get_uid_from_device (device_num);
*res_len = *res ? strlen (*res) : 0;
}
void
omp_get_uid_from_device_8_ (const char **res, size_t *res_len,
int64_t device_num)
{
omp_get_uid_from_device_ (res, res_len, (int32_t) device_num);
}
#ifndef LIBGOMP_OFFLOADED_ONLY
void

1
libgomp/libgomp-plugin.h
View File

@ -127,6 +127,7 @@ extern void GOMP_PLUGIN_target_rev (uint64_t, uint64_t, uint64_t, uint64_t,
/* Prototypes for functions implemented by libgomp plugins. */
extern const char *GOMP_OFFLOAD_get_name (void);
extern const char *GOMP_OFFLOAD_get_uid (int);
extern unsigned int GOMP_OFFLOAD_get_caps (void);
extern int GOMP_OFFLOAD_get_type (void);
extern int GOMP_OFFLOAD_get_num_devices (unsigned int);

2
libgomp/libgomp.h
View File

@ -1387,6 +1387,7 @@ struct gomp_device_descr
/* The name of the device. */
const char *name;
const char *uid;
/* Capabilities of device (supports OpenACC, OpenMP). */
unsigned int capabilities;
@ -1399,6 +1400,7 @@ struct gomp_device_descr
/* Function handlers. */
__typeof (GOMP_OFFLOAD_get_name) *get_name_func;
__typeof (GOMP_OFFLOAD_get_uid) *get_uid_func;
__typeof (GOMP_OFFLOAD_get_caps) *get_caps_func;
__typeof (GOMP_OFFLOAD_get_type) *get_type_func;
__typeof (GOMP_OFFLOAD_get_num_devices) *get_num_devices_func;

8
libgomp/libgomp.map
View File

@ -443,6 +443,14 @@ GOMP_5.1.3 {
omp_get_interop_rc_desc_;
} GOMP_5.1.2;
GOMP_6.0 {
global:
omp_get_device_from_uid;
omp_get_uid_from_device;
omp_get_uid_from_device_;
omp_get_uid_from_device_8_;
} GOMP_5.1.3;
OACC_2.0 {
global:
acc_get_num_devices;

89
libgomp/libgomp.texi
View File

@ -443,7 +443,7 @@ to address of matching mapped list item per 5.1, Sect. 2.21.7.2 @tab N @tab
of the @code{interop} construct @tab N @tab
@item Invoke virtual member functions of C++ objects created on the host device
on other devices @tab N @tab
@item @code{iterator} and @code{mapper} as map-type modifier in @code{declare mappter}
@item @code{iterator} and @code{mapper} as map-type modifier in @code{declare mapper}
@tab N @tab
@end multitable
@ -582,7 +582,7 @@ Technical Report (TR) 13 is the third preview for OpenMP 6.0.
@item @code{omp_is_free_agent} and @code{omp_ancestor_is_free_agent} routines
@tab N @tab
@item @code{omp_get_device_from_uid} and @code{omp_get_uid_from_device} routines
@tab N @tab
@tab Y @tab
@item @code{omp_get_device_num_teams}, @code{omp_set_device_num_teams},
@code{omp_get_device_teams_thread_limit}, and
@code{omp_set_device_teams_thread_limit} routines @tab N @tab
@ -1675,12 +1675,12 @@ They have C linkage and do not throw exceptions.
@menu
* omp_get_num_procs:: Number of processors online
@c * omp_get_max_progress_width:: <fixme>/TR11
@c * omp_get_device_from_uid:: <fixme>/TR13
@c * omp_get_uid_from_device:: <fixme>/TR13
* omp_set_default_device:: Set the default device for target regions
* omp_get_default_device:: Get the default device for target regions
* omp_get_num_devices:: Number of target devices
* omp_get_device_num:: Get device that current thread is running on
* omp_get_device_from_uid:: Obtain the device number to a unique id
* omp_get_uid_from_device:: Obtain the unique id of a device
* omp_is_initial_device:: Whether executing on the host device
* omp_get_initial_device:: Device number of host device
@c * omp_get_device_num_teams:: <fixme>/TR13
@ -1830,6 +1830,71 @@ as required since OpenMP 5.0.
@node omp_get_device_from_uid
@subsection @code{omp_get_device_from_uid} -- Obtain the device number to a unique id
@table @asis
@item @emph{Description}:
This function returns the device number associated with the passed
unique-identifier (UID) string. If no device with this UID is available, the value
@code{omp_invalid_device} is returned. The effect of running this routine in a
@code{target} region is unspecified.
GCC treats the UID string case sensitive; for the initial device, GCC currently
only accepts the value @code{OMP_INITIAL_DEVICE} and returns for it the value
of @code{omp_initial_device}.
@item @emph{C/C++}:
@multitable @columnfractions .20 .80
@item @emph{Prototype}: @tab @code{int omp_get_device_from_uid(const char *uid);}
@end multitable
@item @emph{Fortran}:
@multitable @columnfractions .20 .80
@item @emph{Interface}: @tab @code{integer function omp_get_device_from_uid(uid)}
@item @tab @code{character(len=*), intent(in) :: uid}
@end multitable
@item @emph{See also}:
@ref{omp_get_uid_from_device}, @ref{Offload-Target Specifics}
@item @emph{Reference}:
@uref{https://www.openmp.org, OpenMP specification v6.0}, Section 24.7
@end table
@node omp_get_uid_from_device
@subsection @code{omp_get_uid_from_device} -- Obtain the unique id of a device
@table @asis
@item @emph{Description}:
This function returns a pointer to a string that represents a unique identifier
(UID) for the device specified by @var{device_num}. It returns a @code{NULL} (C/C++)
or a disassociated pointer (Fortran) for @code{omp_invalid_device}. The effect of
running this routine in a @code{target} region is unspecified.
GCC currently returns for initial device the value @code{OMP_INITIAL_DEVICE}.
@item @emph{C/C++}:
@multitable @columnfractions .20 .80
@item @emph{Prototype}: @tab @code{const char *omp_get_uid_from_device(int device_num);}
@end multitable
@item @emph{Fortran}:
@multitable @columnfractions .20 .80
@item @emph{Interface}: @tab @code{character(:) function omp_get_uid_from_device(device_num)}
@item @emph{Interface}: @tab @code{pointer :: omp_get_uid_from_device}
@item @tab @code{integer, intent(in) :: device_num}
@end multitable
@item @emph{See also}:
@ref{omp_get_uid_from_device}, @ref{Offload-Target Specifics}
@item @emph{Reference}:
@uref{https://www.openmp.org, OpenMP specification v6.0}, Section 24.8
@end table
@node omp_is_initial_device
@subsection @code{omp_is_initial_device} -- Whether executing on the host device
@table @asis
@ -3455,13 +3520,13 @@ The effect when invoked from within a @code{target} region is unspecified.
@item @emph{Fortran}:
@multitable @columnfractions .20 .80
@item @emph{Interface}: @tab @code{subroutine omp_display_env(vebose)}
@item @emph{Interface}: @tab @code{subroutine omp_display_env(verbose)}
@item @tab @code{logical, intent(in) :: verbose}
@end multitable
@item @emph{Example}:
Note that the GCC-specific ICVs, such as the shown @code{GOMP_SPINCOUNT},
are only printed when @var{varbose} set to @code{true}.
are only printed when @var{verbose} set to @code{true}.
@smallexample
OPENMP DISPLAY ENVIRONMENT BEGIN
@ -6517,6 +6582,11 @@ The implementation remark:
@code{omp_thread_mem_alloc}, all use low-latency memory as first
preference, and fall back to main graphics memory when the low-latency
pool is exhausted.
@item The unique identifier (UID), used with OpenMP's API UID routines, is the
value returned by the HSA runtime library for @code{HSA_AMD_AGENT_INFO_UUID}.
For GPUs, it is currently @samp{GPU-} followed by 16 lower-case hex digits,
yielding a string like @code{GPU-f914a2142fc3413a}. The output matches
the one used by @code{rocminfo}.
@end itemize
@ -6604,6 +6674,13 @@ The implementation remark:
@code{omp_thread_mem_alloc}, all use low-latency memory as first
preference, and fall back to main graphics memory when the low-latency
pool is exhausted.
@item The unique identifier (UID), used with OpenMP's API UID routines, consists
of the @samp{GPU-} prefix followed by the 16-bytes UUID as returned by
the CUDA runtime library. This UUID is output in grouped lower-case
hex digits; the grouping of those 32 digits is: 8 digits, hyphen,
4 digits, hyphen, 4 digits, hyphen, 16 digits. This leads to a string
like @code{GPU-a8081c9e-f03e-18eb-1827-bf5ba95afa5d}. The output
matches the format used by @code{nvidia-smi}.
@end itemize

3
libgomp/omp.h.in
View File

@ -425,6 +425,9 @@ extern const char *omp_get_interop_type_desc (const omp_interop_t,
extern const char *omp_get_interop_rc_desc (const omp_interop_t,
omp_interop_rc_t) __GOMP_NOTHROW;
extern int omp_get_device_from_uid (const char *) __GOMP_NOTHROW;
extern const char *omp_get_uid_from_device (int) __GOMP_NOTHROW;
#ifdef __cplusplus
}
#endif

23
libgomp/omp_lib.f90.in
View File

@ -1003,6 +1003,29 @@
end function omp_get_interop_rc_desc
end interface
interface
! Note: In gfortran, strings are \0 termined
integer(c_int) function omp_get_device_from_uid(uid) bind(C)
use iso_c_binding
character(c_char), intent(in) :: uid(*)
end function omp_get_device_from_uid
end interface
interface omp_get_uid_from_device
! Deviation from OpenMP 6.0: VALUE added.
character(:) function omp_get_uid_from_device (device_num)
use iso_c_binding
pointer :: omp_get_uid_from_device
integer(c_int32_t), intent(in), value :: device_num
end function omp_get_uid_from_device
character(:) function omp_get_uid_from_device_8 (device_num)
use iso_c_binding
pointer :: omp_get_uid_from_device_8
integer(c_int64_t), intent(in), value :: device_num
end function omp_get_uid_from_device_8
end interface omp_get_uid_from_device
#if _OPENMP >= 201811
!GCC$ ATTRIBUTES DEPRECATED :: omp_get_nested, omp_set_nested
!GCC$ ATTRIBUTES DEPRECATED :: omp_lock_hint_kind, omp_lock_hint_none

23
libgomp/omp_lib.h.in
View File

@ -610,3 +610,26 @@
integer (omp_interop_rc_kind), value :: ret_code
end function omp_get_interop_rc_desc
end interface
interface
! Note: In gfortran, strings are \0 termined
integer(c_int) function omp_get_device_from_uid(uid) bind(C)
use iso_c_binding
character(c_char), intent(in) :: uid(*)
end function omp_get_device_from_uid
end interface
interface omp_get_uid_from_device
! Deviation from OpenMP 6.0: VALUE added.
character(:) function omp_get_uid_from_device (device_num)
use iso_c_binding
pointer :: omp_get_uid_from_device
integer(c_int32_t), intent(in), value :: device_num
end function omp_get_uid_from_device
character(:) function omp_get_uid_from_device_8 (device_num)
use iso_c_binding
pointer :: omp_get_uid_from_device_8
integer(c_int64_t), intent(in), value :: device_num
end function omp_get_uid_from_device_8
end interface omp_get_uid_from_device

2
libgomp/plugin/cuda-lib.def
View File

@ -10,6 +10,8 @@ CUDA_ONE_CALL (cuDeviceGet)
CUDA_ONE_CALL (cuDeviceGetAttribute)
CUDA_ONE_CALL (cuDeviceGetCount)
CUDA_ONE_CALL (cuDeviceGetName)
CUDA_ONE_CALL_MAYBE_NULL (cuDeviceGetUuid)
CUDA_ONE_CALL_MAYBE_NULL (cuDeviceGetUuid_v2)
CUDA_ONE_CALL (cuDeviceTotalMem)
CUDA_ONE_CALL (cuDriverGetVersion)
CUDA_ONE_CALL (cuEventCreate)

16
libgomp/plugin/plugin-gcn.c
View File

@ -3316,6 +3316,22 @@ GOMP_OFFLOAD_get_name (void)
return "gcn";
}
const char *
GOMP_OFFLOAD_get_uid (int ord)
{
char *str;
hsa_status_t status;
struct agent_info *agent = get_agent_info (ord);
/* HSA documentation states: maximally 21 characters including NUL. */
str = GOMP_PLUGIN_malloc (21 * sizeof (char));
status = hsa_fns.hsa_agent_get_info_fn (agent->id, HSA_AMD_AGENT_INFO_UUID,
str);
if (status != HSA_STATUS_SUCCESS)
hsa_fatal ("Could not obtain device UUID", status);
return str;
}
/* Return the specific capabilities the HSA accelerator have. */
unsigned int

34
libgomp/plugin/plugin-nvptx.c
View File

@ -1242,6 +1242,40 @@ GOMP_OFFLOAD_get_name (void)
return "nvptx";
}
const char *
GOMP_OFFLOAD_get_uid (int ord)
{
CUresult r;
CUuuid s;
struct ptx_device *dev = ptx_devices[ord];
if (CUDA_CALL_EXISTS (cuDeviceGetUuid_v2))
r = CUDA_CALL_NOCHECK (cuDeviceGetUuid_v2, &s, dev->dev);
else if (CUDA_CALL_EXISTS (cuDeviceGetUuid))
r = CUDA_CALL_NOCHECK (cuDeviceGetUuid, &s, dev->dev);
else
r = CUDA_ERROR_NOT_FOUND;
if (r != CUDA_SUCCESS)
GOMP_PLUGIN_fatal ("cuDeviceGetUuid error: %s", cuda_error (r));
size_t len = strlen ("GPU-12345678-9abc-defg-hijk-lmniopqrstuv");
char *str = (char *) GOMP_PLUGIN_malloc (len + 1);
sprintf (str,
"GPU-%02x" "%02x" "%02x" "%02x"
"-%02x" "%02x"
"-%02x" "%02x"
"-%02x" "%02x" "%02x" "%02x" "%02x" "%02x" "%02x" "%02x",
(unsigned char) s.bytes[0], (unsigned char) s.bytes[1],
(unsigned char) s.bytes[2], (unsigned char) s.bytes[3],
(unsigned char) s.bytes[4], (unsigned char) s.bytes[5],
(unsigned char) s.bytes[6], (unsigned char) s.bytes[7],
(unsigned char) s.bytes[8], (unsigned char) s.bytes[9],
(unsigned char) s.bytes[10], (unsigned char) s.bytes[11],
(unsigned char) s.bytes[12], (unsigned char) s.bytes[13],
(unsigned char) s.bytes[14], (unsigned char) s.bytes[15]);
return str;
}
unsigned int
GOMP_OFFLOAD_get_caps (void)
{

56
libgomp/target.c
View File

@ -51,6 +51,9 @@
#define splay_tree_c
#include "splay-tree.h"
/* Used by omp_get_device_from_uid / omp_get_uid_from_device for the host. */
static char *str_omp_initial_device = "OMP_INITIAL_DEVICE";
#define STR_OMP_DEV_PREFIX "OMP_DEV_"
typedef uintptr_t *hash_entry_type;
static inline void * htab_alloc (size_t size) { return gomp_malloc (size); }
@ -5223,6 +5226,56 @@ ialias (omp_get_interop_name)
ialias (omp_get_interop_type_desc)
ialias (omp_get_interop_rc_desc)
static const char *
gomp_get_uid_for_device (struct gomp_device_descr *devicep, int device_num)
{
if (devicep->uid)
return devicep->uid;
if (devicep->get_uid_func)
devicep->uid = devicep->get_uid_func (devicep->target_id);
if (!devicep->uid)
{
size_t ln = strlen (STR_OMP_DEV_PREFIX) + 10 + 1;
char *uid;
uid = gomp_malloc (ln);
snprintf (uid, ln, "%s%d", STR_OMP_DEV_PREFIX, device_num);
devicep->uid = uid;
}
return devicep->uid;
}
const char *
omp_get_uid_from_device (int device_num)
{
if (device_num < omp_initial_device || device_num > gomp_get_num_devices ())
return NULL;
if (device_num == omp_initial_device || device_num == gomp_get_num_devices ())
return str_omp_initial_device;
struct gomp_device_descr *devicep = resolve_device (device_num, false);
if (devicep == NULL)
return NULL;
return gomp_get_uid_for_device (devicep, device_num);
}
int
omp_get_device_from_uid (const char *uid)
{
if (uid == NULL)
return omp_invalid_device;
if (strcmp (uid, str_omp_initial_device) == 0)
return omp_initial_device;
for (int dev = 0; dev < gomp_get_num_devices (); dev++)
if (strcmp (uid, gomp_get_uid_for_device (&devices[dev], dev)) == 0)
return dev;
return omp_invalid_device;
}
ialias (omp_get_uid_from_device)
ialias (omp_get_device_from_uid)
#ifdef PLUGIN_SUPPORT
/* This function tries to load a plugin for DEVICE. Name of plugin is passed
@ -5264,6 +5317,7 @@ gomp_load_plugin_for_device (struct gomp_device_descr *device,
}
DLSYM (get_name);
DLSYM_OPT (get_uid, get_uid);
DLSYM (get_caps);
DLSYM (get_type);
DLSYM (get_num_devices);
@ -5449,6 +5503,8 @@ gomp_target_init (void)
}
current_device.name = current_device.get_name_func ();
/* Defer UID setting until needed + after gomp_init_device. */
current_device.uid = NULL;
/* current_device.capabilities has already been set. */
current_device.type = current_device.get_type_func ();
current_device.mem_map.root = NULL;

38
libgomp/testsuite/libgomp.c/device_uid.c Normal file
View File

@ -0,0 +1,38 @@
#include <stdlib.h>
#include <string.h>
#include <omp.h>
int main()
{
const char **strs = (const char **) malloc (sizeof (char*) * (omp_get_num_devices () + 1));
for (int i = omp_invalid_device - 1; i <= omp_get_num_devices () + 1; i++)
{
const char *str = omp_get_uid_from_device (i);
int dev = omp_get_device_from_uid (str);
// __builtin_printf("%i -> %s -> %d\n", i, str, dev);
if (i < omp_initial_device || i > omp_get_num_devices ())
{
if (dev != omp_invalid_device || str != NULL)
abort ();
continue;
}
if (i == omp_initial_device || i == omp_get_num_devices ())
{
if ((dev != omp_initial_device && dev != omp_get_num_devices ())
|| str == NULL
|| strcmp (str, "OMP_INITIAL_DEVICE") != 0) /* GCC impl. choice */
abort ();
dev = omp_get_num_devices ();
}
else if (dev != i || str == NULL || str[0] == '\0')
abort ();
strs[dev] = str;
}
for (int i = 0; i < omp_get_num_devices (); i++)
for (int j = i + 1; j <= omp_get_num_devices (); j++)
if (strcmp (strs[i], strs[j]) == 0)
abort ();
free (strs);
return 0;
}

42
libgomp/testsuite/libgomp.fortran/device_uid.f90 Normal file
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@ -0,0 +1,42 @@
program main
use omp_lib
implicit none (type, external)
integer :: i, j, dev
character(:), pointer :: str
type t
character(:), pointer :: str
end type t
type(t), allocatable :: strs(:)
allocate(strs(0:omp_get_num_devices ()))
do i = omp_invalid_device - 1, omp_get_num_devices () + 1
str => omp_get_uid_from_device (i)
dev = omp_get_device_from_uid (str);
! print *, i, str, dev
if (i < omp_initial_device .or. i > omp_get_num_devices ()) then
if (dev /= omp_invalid_device .or. associated(str)) &
stop 1
cycle
end if
if (.not. associated(str)) &
stop 2
if (i == omp_initial_device .or. i == omp_get_num_devices ()) then
if ((dev /= omp_initial_device .and. dev /= omp_get_num_devices ()) &
.or. str /= "OMP_INITIAL_DEVICE") & ! /* GCC impl. choice */
stop 3
dev = omp_get_num_devices ()
else if (dev /= i .or. len(str) == 0) then
stop 4
end if
strs(dev)%str => str
end do
do i = 0, omp_get_num_devices () - 1
do j = i + 1, omp_get_num_devices ()
if (strs(i)%str == strs(j)%str) &
stop 4
end do
end do
deallocate (strs)
end