diff --git a/tensorflow/compiler/jit/xla_device_context.cc b/tensorflow/compiler/jit/xla_device_context.cc
index 4948fc9965f..e1cef25e33e 100644
--- a/tensorflow/compiler/jit/xla_device_context.cc
+++ b/tensorflow/compiler/jit/xla_device_context.cc
@@ -69,6 +69,7 @@ absl::optional<AllocatorStats> XlaDeviceAllocator::GetStats() {
   tf_stats.bytes_reserved = se_stats->bytes_reserved;
   tf_stats.peak_bytes_reserved = se_stats->peak_bytes_reserved;
   tf_stats.bytes_reservable_limit = se_stats->bytes_reservable_limit;
+  tf_stats.largest_free_block_bytes = se_stats->largest_free_block_bytes;
   return tf_stats;
 }
 
diff --git a/tensorflow/core/framework/allocator.cc b/tensorflow/core/framework/allocator.cc
index 8cc8a29fe48..d20f779c8da 100644
--- a/tensorflow/core/framework/allocator.cc
+++ b/tensorflow/core/framework/allocator.cc
@@ -31,16 +31,22 @@ thread_local MemoryDebugAnnotation ScopedMemoryDebugAnnotation::annotation_;
 
 string AllocatorStats::DebugString() const {
   return strings::Printf(
-      "Limit:        %20lld\n"
-      "InUse:        %20lld\n"
-      "MaxInUse:     %20lld\n"
-      "NumAllocs:    %20lld\n"
-      "MaxAllocSize: %20lld\n",
+      "Limit:            %20lld\n"
+      "InUse:            %20lld\n"
+      "MaxInUse:         %20lld\n"
+      "NumAllocs:        %20lld\n"
+      "MaxAllocSize:     %20lld\n"
+      "Reserved:         %20lld\n"
+      "PeakReserved:     %20lld\n"
+      "LargestFreeBlock: %20lld\n",
       static_cast<long long>(this->bytes_limit ? *this->bytes_limit : 0),
       static_cast<long long>(this->bytes_in_use),
       static_cast<long long>(this->peak_bytes_in_use),
       static_cast<long long>(this->num_allocs),
-      static_cast<long long>(this->largest_alloc_size));
+      static_cast<long long>(this->largest_alloc_size),
+      static_cast<long long>(this->bytes_reserved),
+      static_cast<long long>(this->peak_bytes_reserved),
+      static_cast<long long>(this->largest_free_block_bytes));
 }
 
 constexpr size_t Allocator::kAllocatorAlignment;
diff --git a/tensorflow/core/framework/allocator.h b/tensorflow/core/framework/allocator.h
index 087505f8cd5..dd226b205a9 100644
--- a/tensorflow/core/framework/allocator.h
+++ b/tensorflow/core/framework/allocator.h
@@ -160,13 +160,16 @@ struct AllocatorStats {
   // if such a limit is known.
   absl::optional<int64> bytes_reservable_limit;
 
+  int64 largest_free_block_bytes;  // Largest free block's size in heap.
+
   AllocatorStats()
       : num_allocs(0),
         bytes_in_use(0),
         peak_bytes_in_use(0),
         largest_alloc_size(0),
         bytes_reserved(0),
-        peak_bytes_reserved(0) {}
+        peak_bytes_reserved(0),
+        largest_free_block_bytes(0) {}
 
   std::string DebugString() const;
 };
diff --git a/tensorflow/stream_executor/allocator_stats.cc b/tensorflow/stream_executor/allocator_stats.cc
index 8a45efdef83..0e25063a446 100644
--- a/tensorflow/stream_executor/allocator_stats.cc
+++ b/tensorflow/stream_executor/allocator_stats.cc
@@ -20,13 +20,18 @@ namespace stream_executor {
 
 std::string AllocatorStats::DebugString() const {
   return absl::StrFormat(
-      "Limit:        %20lld\n"
-      "InUse:        %20lld\n"
-      "MaxInUse:     %20lld\n"
-      "NumAllocs:    %20lld\n"
-      "MaxAllocSize: %20lld\n",
+      "Limit:            %20lld\n"
+      "InUse:            %20lld\n"
+      "MaxInUse:         %20lld\n"
+      "NumAllocs:        %20lld\n"
+      "MaxAllocSize:     %20lld\n"
+      "Reserved:         %20lld\n"
+      "PeakReserved:     %20lld\n"
+      "LargestFreeBlock: %20lld\n",
       this->bytes_limit ? *this->bytes_limit : 0, this->bytes_in_use,
-      this->peak_bytes_in_use, this->num_allocs, this->largest_alloc_size);
+      this->peak_bytes_in_use, this->num_allocs, this->largest_alloc_size,
+      this->bytes_reserved, this->peak_bytes_reserved,
+      this->largest_free_block_bytes);
 }
 
 }  // namespace stream_executor
diff --git a/tensorflow/stream_executor/allocator_stats.h b/tensorflow/stream_executor/allocator_stats.h
index 9a99c1099c9..94dafdb6da6 100644
--- a/tensorflow/stream_executor/allocator_stats.h
+++ b/tensorflow/stream_executor/allocator_stats.h
@@ -43,13 +43,16 @@ struct AllocatorStats {
   // if such a limit is known.
   absl::optional<int64> bytes_reservable_limit;
 
+  int64 largest_free_block_bytes;  // Largest free block's size in heap.
+
   AllocatorStats()
       : num_allocs(0),
         bytes_in_use(0),
         peak_bytes_in_use(0),
         largest_alloc_size(0),
         bytes_reserved(0),
-        peak_bytes_reserved(0) {}
+        peak_bytes_reserved(0),
+        largest_free_block_bytes(0) {}
 
   std::string DebugString() const;
 };