set_compute_device_paramT_set_compute_device_paramSetComputeDeviceParamSetComputeDeviceParamset_compute_device_param (算子名称)

名称

set_compute_device_paramT_set_compute_device_paramSetComputeDeviceParamSetComputeDeviceParamset_compute_device_param — Set parameters of an compute device.

参数签名

描述

set_compute_device_paramset_compute_device_paramSetComputeDeviceParamSetComputeDeviceParamSetComputeDeviceParamset_compute_device_param sets parameters of the compute device DeviceHandleDeviceHandleDeviceHandleDeviceHandledeviceHandledevice_handle for the current HALCON thread.

The following parameters can be set:

'alloc_pinned'"alloc_pinned""alloc_pinned""alloc_pinned""alloc_pinned""alloc_pinned"

If 'true'"true""true""true""true""true", the output image matrices of all operators (executed on the compute device or not) called in the current HALCON thread are created in page locked (so called 'pinned') memory. This accelerates the transfer between host and device memory. However, too excessive usage of page locked memory may have a negative impact on overall system performance. You should activate page locked memory allocation if the output image of of the next operator call is to be transferred to the device. Page locked memory allocation should be deactivated for all operator calls whose output images are not required on the compute device (see example).

List of values: 'true'"true""true""true""true""true", 'false'"false""false""false""false""false".

Default: 'true'"true""true""true""true""true".

'asynchronous_execution'"asynchronous_execution""asynchronous_execution""asynchronous_execution""asynchronous_execution""asynchronous_execution"

If 'true'"true""true""true""true""true", operators executed on the compute device do not wait for the device computations to finish but return after initiating the computations. All device computations are synchronized as soon as the output of a compute device operation is used on the CPU (e.g., by disp_imagedisp_imageDispImageDispImageDispImagedisp_image).

List of values: 'true'"true""true""true""true""true", 'false'"false""false""false""false""false".

Default: 'true'"true""true""true""true""true".

'buffer_cache_capacity'"buffer_cache_capacity""buffer_cache_capacity""buffer_cache_capacity""buffer_cache_capacity""buffer_cache_capacity"

Maximum size (in bytes) of the compute device buffer cache.

Default: 1/3 of the available device memory

'image_cache_capacity'"image_cache_capacity""image_cache_capacity""image_cache_capacity""image_cache_capacity""image_cache_capacity"

Maximum size (in bytes) of the compute device image cache.

Default: 1/3 of the available device memory

'pinned_mem_cache_capacity'"pinned_mem_cache_capacity""pinned_mem_cache_capacity""pinned_mem_cache_capacity""pinned_mem_cache_capacity""pinned_mem_cache_capacity"

Maximum size (in bytes) of the page locked (pinned) memory cache.

Default: 32000000 (32MByte)

运行信息

• 多线程类型:可重入(与非独占操作符并行运行)。
• Multithreading scope: local (may only be called from the same thread in which the window, model, or tool instance was created).
• 未经并行化处理。

参数表

例程 (HDevelop)

activate_compute_device (DeviceHandle)
read_image (Image, 'fuse')
set_compute_device_param (DeviceHandle, 'alloc_pinned', 'true')
* filter on compute device, output image is page locked
derivate_gauss (Image, DerivGauss, 3, 'gradient')
* filter result on the CPU, output image should not be page locked
set_compute_device_param (DeviceHandle, 'alloc_pinned', 'false')
median_image (DerivGauss, ImageMedian, 'circle', 1, 'mirrored')

结果

该算子 set_compute_device_paramset_compute_device_paramSetComputeDeviceParamSetComputeDeviceParamSetComputeDeviceParamset_compute_device_param returns the value 2 ( H_MSG_TRUE) 如果参数都是正确的。 Otherwise an exception will be raised.

可能的前置算子

activate_compute_deviceactivate_compute_deviceActivateComputeDeviceActivateComputeDeviceActivateComputeDeviceactivate_compute_device

参考其它

get_compute_device_paramget_compute_device_paramGetComputeDeviceParamGetComputeDeviceParamGetComputeDeviceParamget_compute_device_param

模块

Foundation

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