NAME¶

miniasync_vdm_dml - DML implementation of miniasync(7) virtual data mover

SYNOPSIS¶

#include <libminiasync.h>
#include <libminiasync-vdm-dml.h>
    

For general description of virtual data mover API, see miniasync(7).

DESCRIPTION¶

DML data mover is an implementation of the virtual data mover based on the Data Mover Library(DML). Every DML data mover operation executes under the control of DML.

DML data mover is separated from the primary miniasync(7) library. It’s encapsulated by the miniasync-vdm-dml(7) library that has dependency on the DML library. For information about miniasync_vdm_dml() library compilation, see extras/dml/README.md file.

DML data mover supports offloading certain computations to the hardware accelerators (e.g. Intel® Data Streaming Accelerator). To use this feature, make sure that DML library is installed with DML_HW option. For more information about DML, see <https://github.com/intel/DML>. An example of DML data mover API usage with flags can be found in EXAMPLE section.

When the future is polled for the first time the data mover operation will be executed asynchronously under the control of DML library. DML data mover does not block the calling thread.

To create a new DML data mover instance, use data_mover_dml_new(3) function.

DML data mover provides the following flags:

•

VDM_F_MEM_DURABLE - write to destination is identified as write to durable memory

DML data mover supports following operations:

•

vdm_memcpy(3) - memory copy operation

•

vdm_memmove(3) - memory move operation

•

vdm_memset(3) - memory set operation

•

vdm_flush(3) - cache flush operation

DML data mover does not support notifier feature. For more information about notifiers, see miniasync_future(7).

EXAMPLE¶

Example usage of DML data mover vdm_memcpy(3) operation with MINIASYNC_DML_F_MEM_DURABLE flag:

struct data_mover_dml *dmd = data_mover_dml_new();
struct vdm *dml_mover = data_mover_dml_get_vdm(dmd);
struct vdm_memcpy_future memcpy_fut = vdm_memcpy(dml_mover, dest, src,


        copy_size, MINIASYNC_DML_F_MEM_DURABLE);
    

SEE ALSO¶

data_mover_dml_new(3), data_mover_dml_get_vdm(3), vdm_flush(3), vdm_memcpy(3), vdm_memmove(3), vdm_memset(3), miniasync(7), miniasync_future(7), miniasync_vdm(7), <https://github.com/intel/DML> and <https://pmem.io>