Coherency Parameters Tab - 5.0 English

System Cache LogiCORE IP Product Guide (PG118)

Document ID
PG118
Release Date
2021-11-05
Version
5.0 English
The Coherency Parameters Tab is shown in the following figures.
Note: This tab is only shown when ACE, CCIX or CHI Master Coherency is enabled.
Figure 1. Coherency Parameters Tab with ACE Coherency Protocol
Support Downstream Snoop Filter
Generate transactions to support a downstream snoop filter to improve performance.
Keep After
Preference is to keep the allocation in the cache after a snoop of the indicated type. This may increase performance, but it is application dependent.
Pass Dirty After
Always pass write responsibility with data for a snoop of the indicated type. This may increase performance, but it is application dependent.
Default Sharability Domain
Set default sharability domain to Inner or Outer. Only available with ACE master coherency protocol.
Figure 2. Coherency Parameters Tab with CCIX Coherency Protocol
Support Downstream Snoop Filter
Generate transactions to support a downstream snoop filter to improve performance.
Keep After
Preference is to keep the allocation in the cache after a snoop of the indicated type. This may increase performance, but it is application dependent.
Pass Dirty After
Always pass write responsibility with data for a snoop of the indicated type. This may increase performance, but it is application dependent.
Figure 3. Coherency Parameters Tab with CHI Coherency Protocol
Support Downstream Snoop Filter
Generate transactions to support a downstream snoop filter to improve performance.
Keep After
Preference is to keep the allocation in the cache after a snoop of the indicated type. This may increase performance, but it is application dependent.
Pass Dirty After
Always pass write responsibility with data for a snoop of the indicated type. This may increase performance, but it is application dependent.