CUPTI (PDF) - v9.2.148 (older) - Last updated June 12, 2018 - Send Feedback

## 3.61. CUpti_ActivityUnifiedMemoryCounter2 Struct Reference

## [CUPTI Activity API]

This activity record represents a Unified Memory counter (CUPTI_ACTIVITY_KIND_UNIFIED_MEMORY_COUNTER).

### Public Variables

uint64_t address
CUpti_ActivityUnifiedMemoryCounterKind counterKind
uint32_t dstId
uint64_t end
uint32_t flags
CUpti_ActivityKind kind
uint32_t pad
uint32_t processId
uint32_t srcId
uint64_t start
uint32_t streamId
uint64_t value

### Variables

uint64_t CUpti_ActivityUnifiedMemoryCounter2::address [inherited]

  This is the virtual base address of the page/s being transferred. For cpu and gpu faults, the virtual address for the page that faulted.

CUpti_ActivityUnifiedMemoryCounterKind CUpti_ActivityUnifiedMemoryCounter2::counterKind [inherited]

  The Unified Memory counter kind

uint32_t CUpti_ActivityUnifiedMemoryCounter2::dstId [inherited]

  The ID of the destination CPU/device involved in the memory transfer or remote map operation. Ignore this field if counterKind is CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_GPU_PAGE_FAULT or CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_CPU_PAGE_FAULT_COUNT or CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_THRASHING or CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_THROTTLING

uint64_t CUpti_ActivityUnifiedMemoryCounter2::end [inherited]

  The end timestamp of the counter, in ns. Ignore this field if counterKind is CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_CPU_PAGE_FAULT_COUNT or CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_THRASHING or CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_REMOTE_MAP. For counterKind CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_BYTES_TRANSFER_HTOD and CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_BYTES_TRANSFER_DTOH, timestamp is captured when activity finishes on GPU. For counterKind CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_GPU_PAGE_FAULT, timestamp is captured when CUDA driver queues the replay of faulting memory accesses on the GPU For counterKind CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_THROTTLING, timestamp is captured when throttling operation was finished by CUDA driver

uint32_t CUpti_ActivityUnifiedMemoryCounter2::flags [inherited]

  The flags associated with this record. See enums CUpti_ActivityUnifiedMemoryAccessType if counterKind is CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_GPU_PAGE_FAULT and CUpti_ActivityUnifiedMemoryMigrationCause if counterKind is CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_BYTES_TRANSFER_HTOD or CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_BYTES_TRANSFER_HTOD and CUpti_ActivityUnifiedMemoryRemoteMapCause if counterKind is CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_REMOTE_MAP and CUpti_ActivityFlag if counterKind is CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_THRASHING or CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_THROTTLING

CUpti_ActivityKind CUpti_ActivityUnifiedMemoryCounter2::kind [inherited]

  The activity record kind, must be CUPTI_ACTIVITY_KIND_UNIFIED_MEMORY_COUNTER

uint32_t CUpti_ActivityUnifiedMemoryCounter2::pad [inherited]

  Undefined. Reserved for internal use.

uint32_t CUpti_ActivityUnifiedMemoryCounter2::processId [inherited]

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

uint32_t CUpti_ActivityUnifiedMemoryCounter2::srcId [inherited]

  The ID of the source CPU/device involved in the memory transfer, page fault, thrashing, throttling or remote map operation. For counterKind CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_THRASHING, it is a bitwise ORing of the device IDs fighting for the memory region. Ignore this field if counterKind is CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_CPU_PAGE_FAULT_COUNT

uint64_t CUpti_ActivityUnifiedMemoryCounter2::start [inherited]

  The start timestamp of the counter, in ns. For counterKind CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_BYTES_TRANSFER_HTOD and CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_BYTES_TRANSFER_DTOH, timestamp is captured when activity starts on GPU. For counterKind CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_GPU_PAGE_FAULT and CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_CPU_PAGE_FAULT_COUNT, timestamp is captured when CUDA driver started processing the fault. For counterKind CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_THRASHING, timestamp is captured when CUDA driver detected thrashing of memory region. For counterKind CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_THROTTLING, timestamp is captured when throttling opeeration was started by CUDA driver. For counterKind CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_REMOTE_MAP, timestamp is captured when CUDA driver has pushed all required operations to the processor specified by dstId.

uint32_t CUpti_ActivityUnifiedMemoryCounter2::streamId [inherited]

  The ID of the stream causing the transfer. This value of this field is invalid.

uint64_t CUpti_ActivityUnifiedMemoryCounter2::value [inherited]

  Value of the counter For counterKind CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_BYTES_TRANSFER_HTOD, CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_BYTES_TRANSFER_DTOH, CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_THREASHING and CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_REMOTE_MAP, it is the size of the memory region in bytes. For counterKind CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_GPU_PAGE_FAULT, it is the number of page fault groups for the same page. For counterKind CUPTI_ACTIVITY_UNIFIED_MEMORY_COUNTER_KIND_CPU_PAGE_FAULT_COUNT, it is the program counter for the instruction that caused fault.