MLBEDSW-2377: Greedy allocator improvement
Allocate live ranges with longer life time first.
On average this gives better memory usage.
Change-Id: Id89e9e36a944169a2f10ce7f6e869397ef0abaf0
Signed-off-by: Louis Verhaard <louis.verhaard@arm.com>
diff --git a/ethosu/vela/tensor_allocation.py b/ethosu/vela/tensor_allocation.py
index 2d464ee..d53babc 100644
--- a/ethosu/vela/tensor_allocation.py
+++ b/ethosu/vela/tensor_allocation.py
@@ -91,7 +91,7 @@
print("allocation for", mem_area, "- constant tensors in", sg.placement.name, "subgraph(s)")
else:
print("allocation for", mem_area, "- non-constant tensors in Cpu and Npu subgraphs")
-
+ mem_usage = 0
for start_time, start, end, name, end_time in sorted(
(
lr.start_time,
@@ -104,6 +104,8 @@
):
name = name.replace("\x00", "")
print("%9d: %#12x - %#12x: %3d - %3d %s" % ((end - start), start, end, start_time, end_time, name))
+ mem_usage = max(mem_usage, end)
+ print("Memory usage: {} ({:#x}) bytes / {:.1f} KB".format(mem_usage, mem_usage, mem_usage / 1024))
print()
if show_minimum_possible_allocation and mem_area == MemArea.Sram: