mukesh
9c129d6131
Cube SRAM and HBM live on the cube NoC behind router-attached links (sram_to_router_bw_gbs=128, hbm_to_router_bw_gbs=256). Previously the slot-IO model treated them as if they were per-PE local, so the buffer_kind sweep showed TCM ≈ SRAM at 64 KB / PE. pe_ipcq._handle_recv and pe_dma._handle_ipcq_inbound now charge a PE→bank compute_drain_ns on top of the intrinsic slot-IO for SRAM/HBM. TCM stays free of this hop. Adds an internal IpcqRecvCmd.consume field that gates the recv-side hop+slot-IO charges (used by a follow-up diagnostic API; default True keeps current behavior). Post-fix at 64 KB / PE: TCM 12.0 µs < HBM 21.4 µs < SRAM 24.3 µs. SRAM is slowest because its 128 GB/s bank link is the narrowest in the system — narrower than HBM's 256 GB/s. The existing ordering test is rewritten from tcm<sram<hbm to tcm<hbm<sram and a new test_ipcq_buffer_kind_locations adds 3 invariants on the gap. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Generated Diagrams
This directory contains diagrams generated from topology compilation.
What these files are
- Derived artifacts generated from:
- compiled topology graph
- distance (accumulated latency) metadata
- view/layout rules (ADR-0005)
These files are meant for quick visual inspection and review.
Default outputs
- SIP view:
sip_view.mmd(and/orsip_view.dot) - CUBE view:
cube_view.mmd(and/orcube_view.dot) - PE view:
pe_view.mmd(and/orpe_view.dot)
How to preview
- In VS Code:
- open
.mmdor.mdcontaining Mermaid blocks and use Markdown Preview - for
.dot, use a Graphviz preview extension ordot -Tpng
- open
Notes
- Diagrams are representative and distance-aware by default.
- Instance indices are not required unless debugging asymmetry.
- Outputs should be deterministic for the same topology and rules.