adjust chunking sizes

1 files changed, 2 insertions, 2 deletions

diff --git a/emscripten.py b/emscripten.py
index bf049ee5..e64e11e7 100755
--- a/emscripten.py
+++ b/emscripten.py
@@ -43,7 +43,7 @@ def scan(ll, settings):
   if len(blockaddrs) > 0:
     settings['NECESSARY_BLOCKADDRS'] = blockaddrs
 
-NUM_CHUNKS_PER_CORE = 2
+NUM_CHUNKS_PER_CORE = 1.25
 MIN_CHUNK_SIZE = 1024*1024
 MAX_CHUNK_SIZE = float(os.environ.get('EMSCRIPT_MAX_CHUNK_SIZE') or 'inf') # configuring this is just for debugging purposes
 
@@ -163,7 +163,7 @@ def emscript(infile, settings, outfile, libraries=[]):
   cores = multiprocessing.cpu_count()
   assert cores >= 1
   if cores > 1:
-    intended_num_chunks = int(cores * NUM_CHUNKS_PER_CORE)
+    intended_num_chunks = int(round(cores * NUM_CHUNKS_PER_CORE))
     chunk_size = max(MIN_CHUNK_SIZE, total_ll_size / intended_num_chunks)
     chunk_size += 3*len(meta) + len(forwarded_data)/3 # keep ratio of lots of function code to meta (expensive to process, and done in each parallel task) and forwarded data (less expensive but potentially significant)
     chunk_size = min(MAX_CHUNK_SIZE, chunk_size)