hw: gate the per-instruction trace behind `ifdef DEBUG - #328
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The snitch_cc .dasm tracer opens logs/trace_hart_*.dasm and $fwrites a line per retired instruction unconditionally (guarded only by translate_off) -- for every hart in the design. On a multi-cluster sim that is 100+ harts each doing per-cycle $sformat + $fwrite to disk, which dominates wall-clock during compute and writes hundreds of MB per run even when the trace is not wanted. Fully gate the tracer behind `ifdef DEBUG so it is compiled out by default, and pass -DDEBUG down to the RTL via bender when DEBUG=ON (reusing the existing DEBUG build flag, which the tracer already keys off for $fflush).
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The
snitch_cc.dasmtracer openslogs/trace_hart_*.dasmand$fwrites aline per retired instruction unconditionally (guarded only by
translate_off),for every hart in the design. On a multi-cluster sim that is 100+ harts each
doing a per-cycle
$sformat+$fwriteto disk, which dominates wall-clockduring compute and writes hundreds of MB per run even when the trace is unwanted.
Fully gate the tracer behind `ifdef DEBUG