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25 Aug 2023

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raybox-zero

Accomplishments

  • To do bulk runs of tests described in 0131 I created the script harden_test.sh.

  • I ran it and it tries to do the 8 different OpenLane hardening runs (currently the last 4 fail due to the yosys-abc bug). On my laptop it completes within about 46 minutes, writing stats.md which can be rendered as Markdown. Here are the stats from the design as it currently stands:

    91bc0e5: harden_test.sh: Restore backed-up files

    4x2:1 8x2:1 4x2:2 8x2:2 4x2:3 8x2:3 4x2:4 8x2:4
    cells_pre_abc 18,675 18,675 18,675 18,675 18,478 18,478 18,675 18,675
    TotalCells 20,968 35,823 20,933 35,903 0 0 -1 -1
    suggested_mhz 25.00 25.00 40.80 40.67 47.62 47.62 47.62 47.62
    logic_cells 8,054 7,990 8,046 8,021 0 0 0 0
    utilisation_% 51.99 25.80 51.99 25.80 0.00 0.00 0.00 0.00
    wire_length_um 265,305 246,408 265,320 246,738 0 0 0 0

Next steps

  • Do the proposed changes from yesterday and measure them.
  • Report issues to Matt and Uri -- target clock 25MHz instead of 50MHz; and SYNTH_STRATEGY=4 -- and propose a way to override these via info.yaml in future.

Setting Gnome Terminal tab titles

Add this to ~/.bashrc:

# Function to set Gnome terminal title. For more info, see:
# https://unix.stackexchange.com/a/186167
function set-title() {
  if [[ -z "$ORIG" ]]; then
    ORIG=$PS1
  fi
  TITLE="\[\e]2;$*\a\]"
  PS1=${ORIG}${TITLE}
}

Use it like this:

set-title This is my tab title

Note that the $* part automatically merges all args into 1 string.

NEXT: Figure out how to make a new-pwd handler or prompt (PS1) extension that does this automatically, optionally using one of: (a) relative path; (b) path suffix; (c) repo name/branch; (d) a mapping file of some kind; (e) a per-project/dir file e.g. first heading yanked from README.

Use this example as a guide:

parse_git_branch() {
     git branch 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/(\1)/'
}
export PS1="[\t] \u@\h \[\e[32m\]\w \[\e[91m\]\$(parse_git_branch)\[\e[00m\]$ "