4753a4e311
We introduced the implementation of supporting asynchronous routines with depend objects specified in Version 5.1 of the OpenMP Application Programming Interface. In brief, these routines omp_target_memcpy_async and omp_target_memcpy_rect_async perform asynchronous (nonblocking) memory copies between any combination of host and device pointers. The basic idea is to create the implicit tasks to carry the memory copy calls and handle dependencies specified by depend objects. The implicit tasks are executed via hidden helper thread in OpenMP runtime. Reviewed By: jdoerfert, tianshilei1992 Committed By: jplehr Differential Revision: https://reviews.llvm.org/D136103
49 lines
938 B
C
49 lines
938 B
C
// RUN: %libomptarget-compile-and-run-generic
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// Test case for omp_target_memcpy_async, oringally from GCC
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#include "stdio.h"
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#include <omp.h>
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#include <stdlib.h>
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int main() {
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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 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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q[i] = i;
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if (omp_target_memcpy_async(p, q, 128 * sizeof(int), sizeof(int), 0, d, id, 0,
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NULL)) {
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abort();
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}
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#pragma omp taskwait
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int q2[128];
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for (i = 0; i < 128; ++i)
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q2[i] = 0;
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if (omp_target_memcpy_async(q2, p, 128 * sizeof(int), 0, sizeof(int), id, d,
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0, NULL))
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abort();
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#pragma omp taskwait
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for (i = 0; i < 128; ++i)
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if (q2[i] != q[i])
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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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