CUPTI User's Guide

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Document Change HistoryVer Date Resp Reason for changev01 2011/1/19 DG Initial revision for CUDA Tools SDK 4.0v02 2011/8/15 DG Revisions for CUDA Tools SDK 4.1CUDA Tools SDK CUPTI User’s GuideDA-05679-001_v01 | ii
CUPTIThe CUDA Profiling Tools Interface (CUPTI) enables the creation of profiling and tracingtools that target CUDA applications. CUPTI provides four APIs, the Activity API, theCallback API, the Event API, and the Metric API. Using these APIs, you can developprofiling tools that give insight into the CPU and GPU behavior of CUDA applications.CUPTI is delivered as a dynamic library on all platforms supported by CUDA.CUPTI Compatibility and RequirementsNew versions of the CUDA driver are backwards compatible with older versions of CUPTI.For example, a developer using a profiling tool based on CUPTI 4.0 can update theirCUDA driver to 4.1. However, new versions of CUPTI are not backwards compatible witholder versions of the CUDA driver. For example, a developer using a profiling tool basedon CUPTI 4.1 must have the 4.1 version of the CUDA driver (or later) installed as well.CUPTI calls will fail with CUPTI_ERROR_NOT_INITIALIZED if the CUDA driver version isnot compatible with the CUPTI version.CUPTI InitializationCUPTI initialization occurs lazily the first time you invoke any CUPTI function. The theEvent, Metric, and Callback APIs there are no requirements on when this initializationmust occur (i.e. you can invoke the first CUPTI function at any point). For correctoperation, the Activity API does require that CUPTI be initialized before any CUDAdriver or runtime API is invoked. See the CUPTI Activity API section for moreinformation on CUPTI initialization requirements for the activity API.CUDA Tools SDK CUPTI User’s Guide DA-05679-001_v01 | 3
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Page 9 and 10: device-specific limits. At any give
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Page 26 and 27: CUPTI ReferenceCUPTI VersionDefines
Page 28 and 29: CUPTI Result CodesEnumerations◮ e
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Page 32 and 33: CUPTI_ACTIVITY_COMPUTE_API_OPENCL =
Page 34 and 35: size_t ∗validBufferSizeBytes)Quer
Page 36 and 37: CUPTI_ACTIVITY_MEMCPY_KIND_HTOAcopy
Page 38 and 39: CUptiResult cuptiActivityEnqueueBuf
Page 40 and 41: CUptiResult cuptiActivityGetNumDrop
Page 42 and 43: CUpti_Activity Type ReferenceThe ba
Page 44 and 45: CUpti_ActivityKind CUpti_ActivityAP
Page 46 and 47: Detailed DescriptionThis activity r
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Page 50 and 51: uint64_t CUpti_ActivityEvent::value
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Field Documentationint32_t CUpti_Ac
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uint16_t CUpti_ActivityKernel::regi
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uint8_t CUpti_ActivityMemcpy::copyK
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CUpti_ActivityMemset Type Reference
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CUpti_ActivityMetric Type Reference
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CUPTI Callback APIData Structures
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Enable or disabled all callbacks fo
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Enumerator:CUPTI_CBID_RESOURCE_INVA
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Parameters:enable New enable state
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CUptiResult cuptiUnsubscribe (CUpti
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context.uint32_t CUpti_CallbackData
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CUpti_ResourceData Type ReferenceDa
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CUPTI Event APIData Structures◮ s
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CUPTI_EVENT_GROUP_ATTR_NUM_EVENTS =
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∗eventValueBuffer, size_t ∗even
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CUPTI_DEVICE_ATTR_MAX_EVENT_DOMAIN_
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CUPTI_EVENT_GROUP_ATTR_PROFILE_ALL_
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valueSize The size of the value buf
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Return values:CUPTI_SUCCESSCUPTI_ER
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Parameters:device The CUDA deviceev
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Parameters:eventGroup The event gro
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flags Flags controlling the reading
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Return values:CUPTI_SUCCESSCUPTI_ER
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CUPTI_ERROR_INVALID_OPERATION if an
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CUPTI_METRIC_VALUE_KIND_PERCENT = 2
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enum CUpti_MetricCategoryEach metri
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metricArray Returns the IDs of the
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CUPTI_ERROR_NOT_INITIALIZEDCUPTI_ER
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CUPTI_ERROR_INVALID_PARAMETER if me
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