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# 7.81. CUpti_ActivityMemory4

struct CUpti_ActivityMemory4

  The activity record for memory.

  This activity record represents a memory allocation and free operation (CUPTI_ACTIVITY_KIND_MEMORY2). This activity record provides separate records for memory allocation and memory release operations. This allows to correlate the corresponding driver and runtime API activity record with the memory operation.

  Note: This activity record is an upgrade over CUpti_ActivityMemory enabled using the kind CUPTI_ACTIVITY_KIND_MEMORY. CUpti_ActivityMemory provides a single record for the memory allocation and memory release operations.

  Public Members

  CUpti_ActivityKind kind

    The activity record kind, must be CUPTI_ACTIVITY_KIND_MEMORY2.

  CUpti_ActivityMemoryOperationType memoryOperationType

    The memory operation requested by the user, CUpti_ActivityMemoryOperationType.

  CUpti_ActivityMemoryKind memoryKind

    The memory kind requested by the user, CUpti_ActivityMemoryKind.

  uint32_t correlationId

    The correlation ID of the memory operation.

    Each memory operation is assigned a unique correlation ID that is identical to the correlation ID in the driver and runtime API activity record that launched the memory operation.

  uint64_t address

    The virtual address of the allocation.

    The base address of the memory pool.

  uint64_t bytes

    The number of bytes of memory allocated.

  uint64_t timestamp

    The start timestamp for the memory operation, in ns.

  uint64_t PC

    The program counter of the memory operation.

  uint32_t processId

    The ID of the process to which this record belongs to.

  uint32_t deviceId

    The ID of the device where the memory operation is taking place.

  uint32_t contextId

    The ID of the context.

    If context is NULL, `contextId` is set to CUPTI_INVALID_CONTEXT_ID.

  uint32_t streamId

    The ID of the stream.

    If memory operation is not async, `streamId` is set to CUPTI_INVALID_STREAM_ID.

  const char *name

    Variable name.

    This name is shared across all activity records representing the same symbol, and so should not be modified.

  uint32_t isAsync

    `isAsync` is set if memory operation happens through async memory APIs.

  uint32_t pad1

    Undefined.

    Reserved for internal use.

  CUpti_ActivityMemoryPoolType memoryPoolType

    The type of the memory pool, CUpti_ActivityMemoryPoolType.

  uint32_t pad2

    Undefined.

    Reserved for internal use.

  uint64_t releaseThreshold

    The release threshold of the memory pool in bytes.

    `releaseThreshold` is valid for CUPTI_ACTIVITY_MEMORY_POOL_TYPE_LOCAL, CUpti_ActivityMemoryPoolType.

  union CUpti_ActivityMemory4::[anonymous]::[anonymous] pool

    The size of memory pool in bytes and the processId of the memory pools `size` is valid if `memoryPoolType` is CUPTI_ACTIVITY_MEMORY_POOL_TYPE_LOCAL, CUpti_ActivityMemoryPoolType.

    `processId` is valid if `memoryPoolType` is CUPTI_ACTIVITY_MEMORY_POOL_TYPE_IMPORTED, CUpti_ActivityMemoryPoolType

  uint64_t utilizedSize

    The utilized size of the memory pool.

    `utilizedSize` is valid for CUPTI_ACTIVITY_MEMORY_POOL_TYPE_LOCAL, CUpti_ActivityMemoryPoolType.

  struct CUpti_ActivityMemory4::[anonymous] memoryPoolConfig

    The memory pool configuration used for the memory operations.

  const char *source

    The shared object or binary that the memory allocation request comes from.