6c420193e8
This patch adds two new OpenMP runtime routines: omp_target_memcpy_async and omp_target_memcpy_rect_async. Both functions are introduced in OpenMP 5.1 as asynchronous variants of omp_target_memcpy and omp_target_memcpy_rect. In contrast to the synchronous variants, the asynchronous functions have two additional function parameters to allow the specification of task dependences: int depobj_count omp_depend_t *depobj_list integer(c_int), value :: depobj_count integer(omp_depend_kind), optional :: depobj_list(*) The implementation splits the synchronous functions into two parts: (a) check and (b) copy. Then (a) is used in the asynchronous functions for the sequential part, and the actual copy process (b) is executed in a new created task. The sequential part (a) takes into account the requirements for the return values: "The routine returns zero if successful. Otherwise, it returns a non-zero value." (omp_target_memcpy_async, OpenMP 5.1 spec, section 3.8.7) "An application can determine the number of inclusive dimensions supported by an implementation by passing NULL pointers (or C_NULL_PTR, for Fortran) for both dst and src. The routine returns the number of dimensions supported by the implementation for the specified device numbers. No copy operation is performed." (omp_target_memcpy_rect_async, OpenMP 5.1 spec, section 3.8.8) Due to asynchronicity an error is thrown if the asynchronous memcpy is not successful (in contrast to the synchronous functions which use a return value unequal to zero). gcc/ChangeLog: * omp-low.cc (omp_runtime_api_call): Added target_memcpy_async and target_memcpy_rect_async to omp_runtime_apis array. libgomp/ChangeLog: * libgomp.map: Added omp_target_memcpy_async and omp_target_memcpy_rect_async. * libgomp.texi: Both functions are now supported. * omp.h.in: Added omp_target_memcpy_async and omp_target_memcpy_rect_async. * omp_lib.f90.in: Added interfaces for both new functions. * omp_lib.h.in: Likewise. * target.c (ialias_redirect): Added for GOMP_task. (omp_target_memcpy): Restructured into check and copy part. (omp_target_memcpy_check): New helper function for omp_target_memcpy and omp_target_memcpy_async that checks requirements. (omp_target_memcpy_copy): New helper function for omp_target_memcpy and omp_target_memcpy_async that performs the memcpy. (omp_target_memcpy_async_helper): New helper function that is used in omp_target_memcpy_async for the asynchronous task. (omp_target_memcpy_async): Added. (omp_target_memcpy_rect): Restructured into check and copy part. (omp_target_memcpy_rect_check): New helper function for omp_target_memcpy_rect and omp_target_memcpy_rect_async that checks requirements. (omp_target_memcpy_rect_copy): New helper function for omp_target_memcpy_rect and omp_target_memcpy_rect_async that performs the memcpy. (omp_target_memcpy_rect_async_helper): New helper function that is used in omp_target_memcpy_rect_async for the asynchronous task. (omp_target_memcpy_rect_async): Added. * task.c (ialias): Added for GOMP_task. * testsuite/libgomp.c-c++-common/target-memcpy-async-1.c: New test. * testsuite/libgomp.c-c++-common/target-memcpy-async-2.c: New test. * testsuite/libgomp.c-c++-common/target-memcpy-rect-async-1.c: New test. * testsuite/libgomp.c-c++-common/target-memcpy-rect-async-2.c: New test. * testsuite/libgomp.fortran/target-memcpy-async-1.f90: New test. * testsuite/libgomp.fortran/target-memcpy-async-2.f90: New test. * testsuite/libgomp.fortran/target-memcpy-rect-async-1.f90: New test. * testsuite/libgomp.fortran/target-memcpy-rect-async-2.f90: New test.
74 lines
1.6 KiB
C
74 lines
1.6 KiB
C
/* Test for omp_target_memcpy_async considering dependence objects. */
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#include <omp.h>
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#include <stdlib.h>
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int
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main ()
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{
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int d = omp_get_default_device ();
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int id = omp_get_initial_device ();
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int a[128], b[64], c[32], e[16], q[128], i;
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void *p;
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if (d < 0 || d >= omp_get_num_devices ())
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d = id;
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p = omp_target_alloc (130 * sizeof (int), d);
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if (p == NULL)
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return 0;
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for (i = 0; i < 128; ++i)
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a[i] = i + 1;
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for (i = 0; i < 64; ++i)
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b[i] = i + 2;
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for (i = 0; i < 32; i++)
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c[i] = 0;
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for (i = 0; i < 16; i++)
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e[i] = i + 4;
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omp_depend_t obj[2];
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#pragma omp parallel num_threads(5)
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#pragma omp single
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{
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#pragma omp task depend(out: p)
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omp_target_memcpy (p, a, 128 * sizeof (int), 0, 0, d, id);
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#pragma omp task depend(inout: p)
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omp_target_memcpy (p, b, 64 * sizeof (int), 0, 0, d, id);
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#pragma omp task depend(out: c)
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for (i = 0; i < 32; i++)
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c[i] = i + 3;
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#pragma omp depobj(obj[0]) depend(inout: p)
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#pragma omp depobj(obj[1]) depend(in: c)
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omp_target_memcpy_async (p, c, 32 * sizeof (int), 0, 0, d, id, 2, obj);
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#pragma omp task depend(in: p)
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omp_target_memcpy (p, e, 16 * sizeof (int), 0, 0, d, id);
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}
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#pragma omp taskwait
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for (i = 0; i < 128; ++i)
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q[i] = 0;
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omp_target_memcpy (q, p, 128 * sizeof(int), 0, 0, id, d);
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for (i = 0; i < 16; ++i)
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if (q[i] != i + 4)
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abort ();
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for (i = 16; i < 32; ++i)
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if (q[i] != i + 3)
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abort ();
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for (i = 32; i < 64; ++i)
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if (q[i] != i + 2)
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abort ();
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for (i = 64; i < 128; ++i)
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if (q[i] != i + 1)
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abort ();
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omp_target_free (p, d);
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return 0;
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}
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