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Macros | |
#define | CS_MALLOC_HD(_ptr, _ni, _type, _mode) |
#define | CS_REALLOC_HD(_ptr, _ni, _type, _mode) |
#define | CS_FREE_HD(_ptr) cs_free_hd(_ptr, #_ptr, __FILE__, __LINE__), _ptr = NULL |
#define | CS_FREE(_ptr) cs_free_hd(_ptr, #_ptr, __FILE__, __LINE__), _ptr = NULL |
#define | cs_alloc_mode CS_ALLOC_HOST |
#define | cs_alloc_mode_read_mostly CS_ALLOC_HOST |
#define | cs_mpi_device_support 0; |
#define | cs_associate_device_ptr(_host_ptr, _ni, _size) ; |
Associate device memory with a given host memory pointer. More... | |
#define | cs_disassociate_device_ptr(_host_ptr) ; |
Detach device memory from a given host memory pointer. More... | |
#define | cs_set_alloc_mode(_host_ptr, mode) ; |
Set allocation mode for an already allocated pointer. More... | |
#define | cs_mem_advise_set_read_mostly(ptr) ; |
Advise memory system that a given allocation will be mostly read. More... | |
#define | cs_mem_advise_unset_read_mostly(ptr) ; |
Advise memory system that a given allocation will be mostly read. More... | |
Functions | |
static int | cs_get_device_id (void) |
Return currently associated device id. More... | |
static void * | cs_malloc_hd (cs_alloc_mode_t mode, size_t ni, size_t size, const char *var_name, const char *file_name, int line_num) |
Allocate memory on host and device for ni elements of size bytes. More... | |
static void * | cs_realloc_hd (void *ptr, cs_alloc_mode_t mode, size_t ni, size_t size, const char *var_name, const char *file_name, int line_num) |
Reallocate memory on host and device for ni elements of size bytes. More... | |
static void | cs_free_hd (void *ptr, const char *var_name, const char *file_name, int line_num) |
Free memory on host and device for a given host pointer. More... | |
static void * | cs_get_device_ptr (void *ptr) |
Return matching device pointer for a given pointer. More... | |
static const void * | cs_get_device_ptr_const (const void *ptr) |
Return matching device pointer for a given constant pointer. More... | |
static const void * | cs_get_device_ptr_const_pf (const void *ptr) |
Return matching device pointer for a given constant pointer, prefetching if applicable. More... | |
static cs_alloc_mode_t | cs_check_device_ptr (const void *ptr) |
Check if a pointer is associated with a device. More... | |
static void | cs_sync_h2d (const void *ptr) |
Synchronize data from host to device. More... | |
static void | cs_sync_h2d_future (const void *ptr) |
Initiate synchronization of data from host to device for future access. More... | |
static void | cs_sync_d2h (void *ptr) |
Synchronize data from device to host. More... | |
static void | cs_sync_d2h_if_needed (void *ptr) |
Synchronize data from device to host, only if needed. More... | |
static void | cs_prefetch_h2d (void *ptr, size_t size) |
Prefetch data from host to device. More... | |
static void | cs_prefetch_d2h (void *ptr, size_t size) |
Prefetch data from device to host. More... | |
#define cs_alloc_mode CS_ALLOC_HOST |
#define cs_alloc_mode_read_mostly CS_ALLOC_HOST |
#define cs_associate_device_ptr | ( | _host_ptr, | |
_ni, | |||
_size | |||
) | ; |
Associate device memory with a given host memory pointer.
If the host memory is already associated with the device, the existing device pointer is returned. Otherwise, a new device allocation is called and returned.
[in] | host_ptr | host pointer |
[in] | ni | number of elements |
[in] | size | element size |
#define cs_disassociate_device_ptr | ( | _host_ptr | ) | ; |
Detach device memory from a given host memory pointer.
If the host memory is shared with the device (i.e. using CS_ALLOC_SHARED), device memory stays shared.
[in] | host_ptr | host pointer |
#define CS_FREE | ( | _ptr | ) | cs_free_hd(_ptr, #_ptr, __FILE__, __LINE__), _ptr = NULL |
#define CS_FREE_HD | ( | _ptr | ) | cs_free_hd(_ptr, #_ptr, __FILE__, __LINE__), _ptr = NULL |
#define CS_MALLOC_HD | ( | _ptr, | |
_ni, | |||
_type, | |||
_mode | |||
) |
#define cs_mem_advise_set_read_mostly | ( | ptr | ) | ; |
Advise memory system that a given allocation will be mostly read.
[in] | ptr | pointer to allocation |
#define cs_mem_advise_unset_read_mostly | ( | ptr | ) | ; |
Advise memory system that a given allocation will be mostly read.
[in] | ptr | pointer to allocation |
#define cs_mpi_device_support 0; |
#define CS_REALLOC_HD | ( | _ptr, | |
_ni, | |||
_type, | |||
_mode | |||
) |
#define cs_set_alloc_mode | ( | _host_ptr, | |
mode | |||
) | ; |
Set allocation mode for an already allocated pointer.
If the allocation mode is different from the previous one, the associated memory will be reallocated with the desired mode, and the previous allocation freed.
[in,out] | host_ptr | pointer to host pointer to modify |
[in] | mode | desired allocation mode |
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inlinestatic |
Check if a pointer is associated with a device.
If separate pointers are used on the host and device, the host pointer should be used with this function.
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inlinestatic |
Free memory on host and device for a given host pointer.
If separate pointers are used on the host and device, the host pointer should be used with this function.
[in] | ptr | pointer to free |
[in] | var_name | allocated variable name string |
[in] | file_name | name of calling source file |
[in] | line_num | line number in calling source file |
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inlinestatic |
Return currently associated device id.
Default queue for SYCL
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inlinestatic |
Return matching device pointer for a given pointer.
If separate pointers are used on the host and device, the host pointer should be used with this function.
If memory is not allocated on device yet at the call site, it will be allocated automatically by this function.
[in] | ptr | pointer |
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inlinestatic |
Return matching device pointer for a given constant pointer.
If separate pointers are used on the host and device, the host pointer should be used with this function.
If memory is not allocated on device yet at the call site, it will be allocated automatically by this function.
[in] | ptr | pointer |
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inlinestatic |
Return matching device pointer for a given constant pointer, prefetching if applicable.
If separate pointers are used on the host and device, the host pointer should be used with this function. In this case, it is assumed that the host and device values have already been synchronized, unless memory is not allocated on device yet at the call site, in which case it will be allocated automatically by this function.
[in] | ptr | pointer |
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inlinestatic |
Allocate memory on host and device for ni elements of size bytes.
This function calls the appropriate allocation function based on the requested mode, and allows introspection of the allocated memory.
If separate pointers are used on the host and device, the host pointer is returned.
[in] | mode | allocation mode |
[in] | ni | number of elements |
[in] | size | element size |
[in] | var_name | allocated variable name string |
[in] | file_name | name of calling source file |
[in] | line_num | line number in calling source file |
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inlinestatic |
Prefetch data from device to host.
This function should only be used on arrays using shared host and device memory, shuch as those allocated using CS_ALLOC_HOST_DEVICE_SHARED. It should be usable on a subset of such an array.
[in,out] | ptr | pointer to data to prefetch |
[in] | size | number of bytes to prefetch |
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inlinestatic |
Prefetch data from host to device.
This function should only be used on arrays using shared host and device memory, shuch as those allocated using CS_ALLOC_HOST_DEVICE_SHARED. It should be usable on a subset of such an array.
[in,out] | ptr | pointer to data to prefetch |
[in] | size | number of bytes to prefetch |
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inlinestatic |
Reallocate memory on host and device for ni elements of size bytes.
This function calls the appropriate reallocation function based on the requested mode, and allows introspection of the allocated memory.
If separate pointers are used on the host and device, the host pointer should be used with this function.
If the allocation parameters are unchanged, no actual reallocation occurs on the host.
If the device uses a separate allocation, it is freed, and a new allocation is delayed (as per initial allocation) so as to invalidate copies which will not be up to date anymore after the associated values modification.
[in] | ptr | pointer to previously allocated memory |
[in] | mode | allocation mode |
[in] | ni | number of elements |
[in] | size | element size |
[in] | var_name | allocated variable name string |
[in] | file_name | name of calling source file |
[in] | line_num | line number in calling source file |
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inlinestatic |
Synchronize data from device to host.
If separate allocations are used on the host and device (mode == CS_ALLOC_HOST_DEVICE), the host pointer should be passed to this function.
Depending on the allocaton type, this can imply a copy, data prefetch, or a no-op.
This function assumes the provided pointer was allocated using CS_MALLOC_HD or CS_REALLOC_HD, as it uses the associated mapping to determine associated metadata.
[in,out] | ptr | pointer to values to copy or prefetch |
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inlinestatic |
Synchronize data from device to host, only if needed.
If separate allocations are used on the host and device (mode == CS_ALLOC_HOST_DEVICE), the host pointer should be passed to this function.
Depending on the allocation type, this can imply a copy, data prefetch, or a no-op.
No operation occurs if the provided pointer was not allocated using CS_MALLOC_HD or CS_REALLOC_HD, as it uses the associated mapping to determine associated metadata.
[in,out] | ptr | pointer to values to copy or prefetch |
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inlinestatic |
Synchronize data from host to device.
If separate pointers are used on the host and device, the host pointer should be used with this function.
Depending on the allocation type, this can imply a copy, data prefetch, or a no-op.
This function assumes the provided pointer was allocated using CS_MALLOC_HD or CS_REALLOC_HD, as it uses the associated mapping to determine associated metadata.
[in,out] | ptr | host pointer to values to copy or prefetch |
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inlinestatic |
Initiate synchronization of data from host to device for future access.
If separate pointers are used on the host and device, the host pointer should be used with this function. In this case, synchronization is started (asynchronously if the allocation mode supports it).
In other cases, synchronization will be delayed until actual use. the host pointer should be used with this function.
Depending on the allocation type, this can imply a copy, data prefetch, or a no-op.
This function assumes the provided pointer was allocated using CS_MALLOC_HD or CS_REALLOC_HD, as it uses the associated mapping to determine associated metadata.
[in,out] | ptr | host pointer to values to copy or prefetch |