This step is integrated into nix build flow.
e.g., the following command will generate prof vcd for case 'codegen.vadd_vv' to directory 'result-prof-vcd'
nix build --impure .#t1.blastoise.t1rocketemu.run.codegen.vadd_vv.vcs-prof-vcd -o result-prof-vcd
NOTE: only 't1rocketemu' is supported
nix run .#t1.profiler <INPUT_VCD> <OUTPUT_DIR>
e.g. run nix run .#t1.profiler result-prof-vcd/*.vcd prof-result,
the profiler will generate various analysis results in 'prof-result' directory.
The profiler depends on spike-dasm to do disassemble and
you need to set path of 'spike-dasm' to environment variable SPIKE_DASM
export SPIKE_DASM=$(nix build --print-out-paths .#spike)/bin/spike-dasm
If SPIKE_DASM is not set, all disassembles in inst_map.txt become ''.