NAME¶clGetEventProfilingInfo - Returns profiling information for the command associated with event if profiling is enabled.
cl_int clGetEventProfilingInfo(cl_event event, cl_profiling_info param_name, size_t param_value_size, void *param_value, size_t *param_value_size_ret);
|cl_profiling_info||Return Type||Info. returned in param_value|
|CL_PROFILING_COMMAND_QUEUED||cl_ulong||A 64-bit value that describes the current device time counter in nanoseconds when the command identified by event is enqueued in a command-queue by the host.|
|CL_PROFILING_COMMAND_SUBMIT||cl_ulong||A 64-bit value that describes the current device time counter in nanoseconds when the command identified by event that has been enqueued is submitted by the host to the device associated with the command-queue.|
|CL_PROFILING_COMMAND_START||cl_ulong||A 64-bit value that describes the current device time counter in nanoseconds when the command identified by event starts execution on the device.|
|CL_PROFILING_COMMAND_END||cl_ulong||A 64-bit value that describes the current device time counter in nanoseconds when the command identified by event has finished execution on the device.|
NOTES¶The unsigned 64-bit values returned can be used to measure the time in nano-seconds consumed by OpenCL commands.
OpenCL devices are required to correctly track time across changes in device frequency and power states. The CL_DEVICE_PROFILING_TIMER_RESOLUTION specifies the resolution of the timer i.e. the number of nanoseconds elapsed before the timer is incremented.
Event objects can be used to capture profiling information that measure execution time of a command. Profiling of OpenCL commands can be enabled either by using a command-queue created with CL_QUEUE_PROFILING_ENABLE flag set in properties argument to clCreateCommandQueue(3clc).
ERRORS¶Returns CL_SUCCESS if the function is executed successfully and the profiling information has been recorded. Otherwise, it returns one of the following errors:
AUTHORS¶The Khronos Group
COPYRIGHT¶Copyright © 2007-2011 The Khronos Group Inc.
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and/or associated documentation files (the "Materials"), to deal in the Materials without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Materials, and to permit persons to whom the Materials are furnished to do so, subject to the condition that this copyright notice and permission notice shall be included in all copies or substantial portions of the Materials.
- OpenCL Specification
|02/03/2019||The Khronos Group|