[vpr][route] add comment for routing struggle metric

amin1377 · amin1377 · commit f9673e90c70d · 2025-11-10T07:54:33.000-08:00
diff --git a/vpr/src/route/route.cpp b/vpr/src/route/route.cpp
@@ -582,6 +582,8 @@ bool route(const Netlist<>& net_list,
         // profiling::time_on_criticality_analysis();
     }
 
+    // Calculates the number of iterations with high heap ops.
+    // This is defined as an iteration that has more heap operations than the maximum of the previous three iterations.
     int num_high_heap_ops_iters = 0;
     if (per_iter_heap_ops_count.size() > 4) {
         for (int i = 3; i < static_cast<int>(per_iter_heap_ops_count.size()); i++) {

Original file line number	Diff line number	Diff line change
`@@ -582,6 +582,8 @@ bool route(const Netlist<>& net_list,`
`582`	`582`	`// profiling::time_on_criticality_analysis();`
`583`	`583`	`}`
`584`	`584`
	`585`	`+ // Calculates the number of iterations with high heap ops.`
	`586`	`+ // This is defined as an iteration that has more heap operations than the maximum of the previous three iterations.`
`585`	`587`	`int num_high_heap_ops_iters = 0;`
`586`	`588`	`if (per_iter_heap_ops_count.size() > 4) {`
`587`	`589`	`for (int i = 3; i < static_cast<int>(per_iter_heap_ops_count.size()); i++) {`