Slack waterfall: every timing path of a routed design, worst first

159 endpoints of a real nextpnr-xilinx run at 50 MHz as logic and routing waterfalls, checked bin by bin against nextpnr's log. Drop a --report JSON for yours.

A file you open here is read by your browser only: it is never uploaded. The page sets no cookie and sends nothing anywhere.

Where the numbers come from

gHashTag/trinity-fpga de4ebda367: fpga/openxc7-synth/trinity_v3_jtaguart.v and jtaguart.xdc
nextpnr-xilinx 0.9.2-107-g7037c948 --chipdb xc7a200tfbg676-1.bin --freq 50 --seed 1: routed.sdf, report.json (fmax) and the log's critical path and slack histogram
scripts/widget-data/fpga-pnr.py: per-endpoint paths from the SDF, checked against the log, written to timing.json
nextpnr common/timing.cc and xilinx/arch.cc (nextpnr-xilinx 0.9.2-107-g7037c948): the arrival, setup and port-class rules followed
A nextpnr --report JSON or a fpga-pnr.py timing.json the reader drops or picks: read in the browser with FileReader, never uploaded

This widget's .t27 source · All widgets