# Utilizing Pegasus HW Accelerators

**URL:** <https://forums.developer.nvidia.com/t/utilizing-pegasus-hw-accelerators/186845>\
**Category:** Jetson AGX Xavier\
**Tags:** camera\
**Created:** [August 17, 2021, 11:41pm UTC](https://forums.developer.nvidia.com/t/utilizing-pegasus-hw-accelerators/186845 "2021-08-17T23:41:36Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![ai.trucker](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@ai.trucker](https://forums.developer.nvidia.com/u/ai.trucker)\
**Post date:** [August 17, 2021, 11:41pm UTC](https://forums.developer.nvidia.com/t/utilizing-pegasus-hw-accelerators/186845/1 "2021-08-17T23:41:36Z")

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Hi All,

Is there a table or document which gives following information ?

1. How many documented HW accelerators are there on Xavier (and Orin) ? ISP, PVA, Codecs, OpticalFlow, DisplayHead etc?
2. Details about capability of each accelerator. What can it accelerate ? E.g. can ISP do debayer, scale and rotate in one go ? What would be data path of such an operation in ISP ? Will it read bayer data from DDR or will it directly receive it from CSI interface ? Will it write debayered output to DDR or and then read it back for scaling or rotation ?
3. What are recommended nvidia SDK/APIs to use those accelerators ? E.g. I am guessing that in order to accelerate codec functionality, we should use NvMedia ?
4. Are recommended APIs safety certified (ASIL-D) ?
5. What is recommended image buffer format to be used with these accelerators ?
6. Can the accelerator feed or receive data from GPU - if so what is recommended buffer format and APIs to facilitate this ?
7. Is there a list of opencv functions / operations which can be accelerated by ISP/ PVA or other accelerators ?
8. Are there any performance numbers which compares time required by an opencv function/algorithm on Xavier CPU/iGPU/accelerator-which-can-accelerate-that-function.

Ideally I would prefer this information tabulated for Xavier and Orin side by side.

Thanks.

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**Author:** ![kayccc](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/kayccc/32/14043_2.png) [@kayccc](https://forums.developer.nvidia.com/u/kayccc)\
**Post date:** [August 18, 2021, 12:07am UTC](https://forums.developer.nvidia.com/t/utilizing-pegasus-hw-accelerators/186845/2 "2021-08-18T00:07:49Z")

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Hi,  
This looks like a DRIVE platform issue. We recommend you to raise it to the respective platform from the below link  
[Latest DRIVE AGX/DRIVE AGX General topics - NVIDIA Developer Forums](https://forums.developer.nvidia.com/c/agx-autonomous-machines/drive-agx/general/59)  
Thanks!

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**Author:** ![system](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/system/32/68080_2.png) [@system](https://forums.developer.nvidia.com/u/system)\
**Post date:** [October 17, 2021, 12:08am UTC](https://forums.developer.nvidia.com/t/utilizing-pegasus-hw-accelerators/186845/3 "2021-10-17T00:08:28Z")

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