<p>Since there is a 1:1 mapping of package and core energy consumption for workloads that only use core ressources [1, Fig. 9b] this is <strong>very</strong> likely.</p>
<p>[1] <a href="https://arxiv.org/pdf/2108.00808" rel="nofollow noreferrer">https://arxiv.org/pdf/2108.00808</a></p>
AMD RAPL power domains relations
<p>Intel CPUs provide power monitoring via RAPL for several power domains - PKG, DRAM, PPx, Platform. Many sources describe these power domains and their relations, nice figure is in  <em>Khan, K. et al. “RAPL in Action.” ACM Transactions on Modeling and Performance Evaluation of Computing Systems (TOMPECS) 3 (2018): 1 - 26.</em>
<a href="https://i.stack.imgur.com/wPt6F.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/wPt6F.png" alt="enter image description here" /></a></p>
<p>AMD CPUs also have RAPL interface for power monitoring (as far as I know) PKG and Core domains, however I have not found any source presenting relations of these power domains. <strong>Does PKG domain include Core domains?</strong> One would expect that it does, but it is just an assumption.</p>