diff --git a/crates/ipu-codegen/src/place.rs b/crates/ipu-codegen/src/place.rs
index 0e742bd..dda59c3 100644
--- a/crates/ipu-codegen/src/place.rs
+++ b/crates/ipu-codegen/src/place.rs
@@ -95,6 +95,26 @@ pub(crate) fn place_with_offset(
     program: &LowProgram,
     available_ranges: &[(u32, u32)],
     interleaved_offset: u32,
+) -> Result<Placement, PlacementError> {
+    if std::env::var_os("IPU_CAPACITY_PROBE").is_some() && available_ranges.contains(&(475136, 524288)) {
+        for extra in (0..=98304u32).step_by(4096) {
+            let mut ranges = available_ranges.to_vec();
+            let region = ranges.iter_mut().find(|(_, end)| *end == 524288).unwrap();
+            region.0 -= extra;
+            ranges = crate::memory::merge_ranges(ranges);
+            let start = std::time::Instant::now();
+            let result = place_capacity_original(program, &ranges, interleaved_offset);
+            eprintln!("CAPACITY_PROBE extra={extra} result={:?} elapsed_ms={}", result.as_ref().map(|_| ()), start.elapsed().as_millis());
+            if result.is_ok() { break; }
+        }
+    }
+    place_capacity_original(program, available_ranges, interleaved_offset)
+}
+
+fn place_capacity_original(
+    program: &LowProgram,
+    available_ranges: &[(u32, u32)],
+    interleaved_offset: u32,
 ) -> Result<Placement, PlacementError> {
     let started = std::time::Instant::now();
     if interleaved_offset >= IPU21_INTERLEAVED_ELEMENT_SIZE {