# \#hip

**URL:** https://pyfr.discourse.group/tag/hip/22.md

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## [Why are there device to device copies](https://pyfr.discourse.group/t/why-are-there-device-to-device-copies/904)

<div class="topic-metadata">

**Author:** [@luli](https://pyfr.discourse.group/u/luli)\
**Replies:** 1\
**Last updated:** [29 August 2023 16:38 UTC](https://pyfr.discourse.group/t/why-are-there-device-to-device-copies/904 "2023-08-29T16:38:42Z")

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Hello , everyone ! I run tgv case TGV Performance Numbers - General - PyFR , and profile with nsys, I found there is DtoD operations . I only use one chip , why there is a copy operation ? Where does it appear in the…