PinnedMemoryPool (cudfjni 25.02.0 API)

java.lang.Object
- ai.rapids.cudf.PinnedMemoryPool

All Implemented Interfaces:

AutoCloseable
```
public final class PinnedMemoryPool
extends Object
implements AutoCloseable
```
This is the JNI interface to a rmm::pool_memory_resource.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`static HostMemoryBuffer`	`allocate(long bytes)` Factory method to create a host buffer but preferably pointing to pinned memory.
`static HostMemoryBuffer`	`allocate(long bytes, HostMemoryAllocator hostMemoryAllocator)` Factory method to create a host buffer but preferably pointing to pinned memory.
`void`	`close()`
`static boolean`	`configureDefaultCudfPinnedPoolSize(long size)` Sets the size of the cuDF default pinned pool.
`static long`	`getTotalPoolSizeBytes()` Get the number of bytes that the pinned memory pool was allocated with.
`static void`	`initialize(long poolSize)` Initialize the pool.
`static void`	`initialize(long poolSize, int gpuId)` Initialize the pool.
`static void`	`initialize(long poolSize, int gpuId, boolean setCudfPinnedPoolMemoryResource)` Initialize the pool.
`static boolean`	`isInitialized()` Check if the pool has been initialized or not.
`static void`	`shutdown()` Shut down the RMM pool_memory_resource, nulling out our reference.
`static HostMemoryBuffer`	`tryAllocate(long bytes)` Factory method to create a pinned host memory buffer.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - initialize
```
public static void initialize(long poolSize)
```
    Initialize the pool.
    
    Parameters:
    
    poolSize - size of the pool to initialize.
  - initialize
```
public static void initialize(long poolSize,
                              int gpuId)
```
    Initialize the pool.
    
    Parameters:
    
    poolSize - size of the pool to initialize.
    
    gpuId - gpu id to set to get memory pool from, -1 means to use default
  - initialize
```
public static void initialize(long poolSize,
                              int gpuId,
                              boolean setCudfPinnedPoolMemoryResource)
```
    Initialize the pool.
    
    Parameters:
    
    poolSize - size of the pool to initialize.
    
    gpuId - gpu id to set to get memory pool from, -1 means to use default
    
    setCudfPinnedPoolMemoryResource - true if this pinned pool should be used by cuDF for pinned memory
  - isInitialized
```
public static boolean isInitialized()
```
    Check if the pool has been initialized or not.
  - shutdown
```
public static void shutdown()
```
    Shut down the RMM pool_memory_resource, nulling out our reference. Any allocation or free that is in flight will fail after this.
  - tryAllocate
```
public static HostMemoryBuffer tryAllocate(long bytes)
```
    Factory method to create a pinned host memory buffer.
    
    Parameters:
    
    bytes - size in bytes to allocate
    
    Returns:
    
    newly created buffer or null if insufficient pinned memory
  - allocate
```
public static HostMemoryBuffer allocate(long bytes,
                                        HostMemoryAllocator hostMemoryAllocator)
```
    Factory method to create a host buffer but preferably pointing to pinned memory. It is not guaranteed that the returned buffer will be pointer to pinned memory.
    
    Parameters:
    
    bytes - size in bytes to allocate
    
    Returns:
    
    newly created buffer
  - allocate
```
public static HostMemoryBuffer allocate(long bytes)
```
    Factory method to create a host buffer but preferably pointing to pinned memory. It is not guaranteed that the returned buffer will be pointer to pinned memory.
    
    Parameters:
    
    bytes - size in bytes to allocate
    
    Returns:
    
    newly created buffer
  - getTotalPoolSizeBytes
```
public static long getTotalPoolSizeBytes()
```
    Get the number of bytes that the pinned memory pool was allocated with.
  - close
```
public void close()
```
    Specified by:
    
    close in interface AutoCloseable
  - configureDefaultCudfPinnedPoolSize
```
public static boolean configureDefaultCudfPinnedPoolSize(long size)
```
    Sets the size of the cuDF default pinned pool.
    
    Parameters:
    
    size - initial and maximum size for the cuDF default pinned pool. Pass size=0 to disable the default pool.
    
    Returns:
    
    true if we were able to setup the default resource, false if there was a resource already set.

Class PinnedMemoryPool

Method Summary

Methods inherited from class java.lang.Object

Method Detail

initialize

initialize

initialize

isInitialized

shutdown

tryAllocate

allocate

allocate

getTotalPoolSizeBytes

close

configureDefaultCudfPinnedPoolSize