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//------------------------------------------------------------------------------
// GB_cuda_warmup.cu: warmup the GPU
//------------------------------------------------------------------------------
// SPDX-License-Identifier: Apache-2.0
// SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2019, All Rights Reserved.
// http://suitesparse.com See GraphBLAS/Doc/License.txt for license.
//------------------------------------------------------------------------------
#include "GB_cuda.h"
bool GB_cuda_warmup (int device)
{
// allocate 'nothing' just to load the drivers.
// No need to free the result.
bool ok = GB_cuda_set_device( device );
if (!ok)
{
printf ("invalid GPU: %d\n", device) ;
return (false) ;
}
double gpu_memory_size = GB_Global_gpu_memorysize_get (device);
printf ("warming up device %d memsize %g sms %d\n",
device,
gpu_memory_size,
GB_Global_gpu_sm_get (device)) ;
size_t size = 0 ;
void *p = GB_malloc_memory (1, 1, &size) ;
if (p == NULL)
{
printf ("Hey!! where's da memory???\n") ;
return (false) ;
}
printf ("oooo nice block of memory of size %lu\n", size) ;
GB_free_memory ( &p, size) ;
printf ("be free, block of memory of size %lu\n", size) ;
printf ("good ol' cudaMalloc just to be sure\n");
cudaMalloc ( &p, size ) ;
if (p == NULL)
{
printf ("Hey!! where's da GPU???\n") ;
return (false) ;
}
cudaFree (p) ;
printf ("GPU %d nice and toasty now\n", device) ;
// TODO check for jit cache? or in GB_init?
return true; //(err == cudaSuccess) ;
}
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