Turn the bucket count into a knob, but keep cleaner wake-ups at a constant rate

1 files changed, 5 insertions, 0 deletions

diff --git a/trackerlogic.h b/trackerlogic.h
index 338e4e6..7292d36 100644
--- a/trackerlogic.h
+++ b/trackerlogic.h
@@ -62,7 +62,12 @@ typedef struct {
 
 /* We maintain a list of 1024 pointers to sorted list of ot_torrent structs
  Sort key is, of course, its hash */
+/* Set from the Makefile, 8 to 16. More buckets means shorter vectors and a
+   cheaper insert, which only pays for a tracker carrying millions of
+   torrents; see DESIGN. */
+#ifndef OT_BUCKET_COUNT_BITS
 #define OT_BUCKET_COUNT_BITS          10
+#endif
 
 #define OT_BUCKET_COUNT               (1 << OT_BUCKET_COUNT_BITS)
 #define OT_BUCKET_COUNT_SHIFT         (32 - OT_BUCKET_COUNT_BITS)