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StarPU Handbook
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Data Structures | |
| struct | starpu_disk_ops |
Macros | |
| #define | STARPU_DISK_SIZE_MIN |
Functions | |
| void | starpu_disk_close (unsigned node, void *obj, size_t size) |
| void * | starpu_disk_open (unsigned node, void *pos, size_t size) |
| int | starpu_disk_register (struct starpu_disk_ops *func, void *parameter, starpu_ssize_t size) |
Variables | |
| struct starpu_disk_ops | starpu_disk_stdio_ops |
| struct starpu_disk_ops | starpu_disk_hdf5_ops |
| struct starpu_disk_ops | starpu_disk_unistd_ops |
| struct starpu_disk_ops | starpu_disk_unistd_o_direct_ops |
| struct starpu_disk_ops | starpu_disk_leveldb_ops |
| int | starpu_disk_swap_node |
| struct starpu_disk_ops |
Set of functions to manipulate data on disk. See Disk functions for more details.
Data Fields | |
| void *(* | plug )(void *parameter, starpu_ssize_t size) |
| void(* | unplug )(void *base) |
| int(* | bandwidth )(unsigned node, void *base) |
| void *(* | alloc )(void *base, size_t size) |
| void(* | free )(void *base, void *obj, size_t size) |
| void *(* | open )(void *base, void *pos, size_t size) |
| void(* | close )(void *base, void *obj, size_t size) |
| int(* | read )(void *base, void *obj, void *buf, off_t offset, size_t size) |
| int(* | write )(void *base, void *obj, const void *buf, off_t offset, size_t size) |
| int(* | full_read )(void *base, void *obj, void **ptr, size_t *size, unsigned dst_node) |
| int(* | full_write )(void *base, void *obj, void *ptr, size_t size) |
| void *(* | async_write )(void *base, void *obj, void *buf, off_t offset, size_t size) |
| void *(* | async_read )(void *base, void *obj, void *buf, off_t offset, size_t size) |
| void *(* | async_full_read )(void *base, void *obj, void **ptr, size_t *size, unsigned dst_node) |
| void *(* | async_full_write )(void *base, void *obj, void *ptr, size_t size) |
| void *(* | copy )(void *base_src, void *obj_src, off_t offset_src, void *base_dst, void *obj_dst, off_t offset_dst, size_t size) |
| void(* | wait_request )(void *async_channel) |
| int(* | test_request )(void *async_channel) |
| void(* | free_request )(void *async_channel) |
| void *(* starpu_disk_ops::plug) (void *parameter, starpu_ssize_t size) |
Connect a disk memory at location parameter with size size, and return a base as void*, which will be passed by StarPU to all other methods.
| void(* starpu_disk_ops::unplug) (void *base) |
Disconnect a disk memory base.
| int(* starpu_disk_ops::bandwidth) (unsigned node, void *base) |
Measure the bandwidth and the latency for the disk node and save it. Returns 1 if it could measure it.
| void *(* starpu_disk_ops::alloc) (void *base, size_t size) |
Create a new location for data of size size. Return an opaque object pointer.
| void(* starpu_disk_ops::free) (void *base, void *obj, size_t size) |
Free a data obj previously allocated with starpu_disk_ops::alloc.
| void *(* starpu_disk_ops::open) (void *base, void *pos, size_t size) |
Open an existing location of data, at a specific position pos dependent on the backend.
| void(* starpu_disk_ops::close) (void *base, void *obj, size_t size) |
Close, without deleting it, a location of data obj.
| int(* starpu_disk_ops::read) (void *base, void *obj, void *buf, off_t offset, size_t size) |
Read size bytes of data from obj in base, at offset offset, and put into buf. Return the actual number of read bytes.
| int(* starpu_disk_ops::write) (void *base, void *obj, const void *buf, off_t offset, size_t size) |
Write size bytes of data to obj in base, at offset offset, from buf. Return 0 on success.
| int(* starpu_disk_ops::full_read) (void *base, void *obj, void **ptr, size_t *size, unsigned dst_node) |
Read all data from obj of base, from offset 0. Returns it in an allocated buffer ptr, of size size
| int(* starpu_disk_ops::full_write) (void *base, void *obj, void *ptr, size_t size) |
Write data in ptr to obj of base, from offset 0, and truncate obj to size, so that a full_read will get it.
| void *(* starpu_disk_ops::async_write) (void *base, void *obj, void *buf, off_t offset, size_t size) |
Asynchronously write size bytes of data to obj in base, at offset offset, from buf. Return a void* pointer that StarPU will pass to xxx_request methods for testing for the completion.
| void *(* starpu_disk_ops::async_read) (void *base, void *obj, void *buf, off_t offset, size_t size) |
Asynchronously read size bytes of data from obj in base, at offset offset, and put into buf. Return a void* pointer that StarPU will pass to xxx_request methods for testing for the completion.
| void *(* starpu_disk_ops::async_full_read) (void *base, void *obj, void **ptr, size_t *size, unsigned dst_node) |
Read all data from obj of base, from offset 0. Return it in an allocated buffer ptr, of size size
| void *(* starpu_disk_ops::async_full_write) (void *base, void *obj, void *ptr, size_t size) |
Write data in ptr to obj of base, from offset 0, and truncate obj to size, so that a starpu_disk_ops::full_read will get it.
| void *(* starpu_disk_ops::copy) (void *base_src, void *obj_src, off_t offset_src, void *base_dst, void *obj_dst, off_t offset_dst, size_t size) |
Copy from offset offset_src of disk object obj_src in base_src to offset offset_dst of disk object obj_dst in base_dst. Return a void* pointer that StarPU will pass to xxx_request methods for testing for the completion.
| void(* starpu_disk_ops::wait_request) (void *async_channel) |
Wait for completion of request async_channel returned by a previous asynchronous read, write or copy.
| int(* starpu_disk_ops::test_request) (void *async_channel) |
Test for completion of request async_channel returned by a previous asynchronous read, write or copy. Return 1 on completion, 0 otherwise.
| void(* starpu_disk_ops::free_request) (void *async_channel) |
Free the request allocated by a previous asynchronous read, write or copy.
| #define STARPU_DISK_SIZE_MIN |
Minimum size of a registered disk. The size of a disk is the last parameter of the function starpu_disk_register().
| void starpu_disk_close | ( | unsigned | node, |
| void * | obj, | ||
| size_t | size | ||
| ) |
Close an existing data opened with starpu_disk_open(). See Introduction for more details.
| void * starpu_disk_open | ( | unsigned | node, |
| void * | pos, | ||
| size_t | size | ||
| ) |
Open an existing file memory in a disk node. size is the size of the file. pos is the specific position dependent on the backend, given to the open method of the disk operations. Return an opaque object pointer. See Introduction for more details.
| int starpu_disk_register | ( | struct starpu_disk_ops * | func, |
| void * | parameter, | ||
| starpu_ssize_t | size | ||
| ) |
Register a disk memory node with a set of functions to manipulate data. The plug member of func will be passed parameter, and return a base which will be passed to all func methods.
SUCCESS: return the disk node.
FAIL: return an error code.
size must be at least STARPU_DISK_SIZE_MIN bytes ! size being negative means infinite size.
See Introduction for more details.
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Use the stdio library (fwrite, fread...) to read/write on disk.
Warning: It creates one file per allocation !
Do not support asynchronous transfers.
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Use the HDF5 library.
It doesn't support multiple opening from different processes.
You may only allow one process to write in the HDF5 file.
If HDF5 library is not compiled with –thread-safe you can't open more than one HDF5 file at the same time.
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Use the unistd library (write, read...) to read/write on disk.
Warning: It creates one file per allocation !
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Use the unistd library (write, read...) to read/write on disk with the O_DIRECT flag.
Warning: It creates one file per allocation !
Only available on Linux systems.
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Use the leveldb created by Google. More information at https://code.google.com/p/leveldb/ Do not support asynchronous transfers.
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Contain the node number of the disk swap, if set up through the STARPU_DISK_SWAP variable.