From 3f2451f8d78c88e299cb421539add41eadae17bf Mon Sep 17 00:00:00 2001
From: gatecat <gatecat@ds0.me>
Date: Fri, 3 May 2024 09:50:40 +0200
Subject: [PATCH] static: Guard density CSV dumps behind a flag

Signed-off-by: gatecat <gatecat@ds0.me>
---
 common/kernel/command.cc      | 7 +++++++
 common/place/placer_static.cc | 5 ++++-
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/common/kernel/command.cc b/common/kernel/command.cc
index 44482946..d6d451f5 100644
--- a/common/kernel/command.cc
+++ b/common/kernel/command.cc
@@ -389,6 +389,9 @@ po::options_description CommandHandler::getGeneralOptions()
                           "allow placer to attempt up to max(10000, total cells^2 / N) iterations to place a cell (int "
                           "N, default: 8, 0 for no timeout)");
 
+    general.add_options()("static-dump-density", "write density csv files during placer-static flow");
+
+
 #if !defined(NPNR_DISABLE_THREADS)
     general.add_options()("parallel-refine", "use new experimental parallelised engine for placement refinement");
 #endif
@@ -543,6 +546,10 @@ void CommandHandler::setupContext(Context *ctx)
     if (vm.count("router2-alt-weights"))
         ctx->settings[ctx->id("router2/alt-weights")] = true;
 
+    if (vm.count("static-dump-density"))
+        ctx->settings[ctx->id("static/dump_density")] = true;
+
+
     // Setting default values
     if (ctx->settings.find(ctx->id("target_freq")) == ctx->settings.end())
         ctx->settings[ctx->id("target_freq")] = std::to_string(12e6);
diff --git a/common/place/placer_static.cc b/common/place/placer_static.cc
index c9b5364c..0466902c 100644
--- a/common/place/placer_static.cc
+++ b/common/place/placer_static.cc
@@ -254,6 +254,7 @@ class StaticPlacer
     int width, height;
     int iter = 0;
     bool fft_debug = false;
+    bool dump_density = false;
 
     // legalisation queue
     std::priority_queue<std::pair<int, IdString>> to_legalise;
@@ -658,7 +659,8 @@ class StaticPlacer
             if (!overlap_str.empty())
                 overlap_str += ", ";
             overlap_str += stringf("%s=%.1f%%", cfg.cell_groups.at(idx).name.c_str(ctx), g.overlap * 100);
-            g.conc_density.write_csv(stringf("out_conc_density_%d_%d.csv", iter, idx));
+            if (dump_density)
+                g.conc_density.write_csv(stringf("out_conc_density_%d_%d.csv", iter, idx));
         }
         log_info("overlap: %s\n", overlap_str.c_str());
     }
@@ -1387,6 +1389,7 @@ class StaticPlacer
         groups.resize(cfg.cell_groups.size());
         tmg.setup_only = true;
         tmg.setup();
+        dump_density = ctx->setting<bool>("static/dump_density", false);
     };
     void place()
     {