upstream: Fix calculation of initial bandwidth limits. Account for

written bytes before the initial timer check so that the first buffer written
is accounted.  Set the threshold after which the timer is checked such that
the limit starts being computed as soon as possible, ie after the second
buffer is written.  This prevents an initial burst of traffic and provides a
more accurate bandwidth limit.  bz#2927, ok djm.

OpenBSD-Commit-ID: ff3ef76e4e43040ec198c2718d5682c36b255cb6

1 files changed, 4 insertions, 2 deletions

diff --git a/misc.h b/misc.h
index bcae6a509..2dd61dc32 100644
--- a/misc.h
+++ b/misc.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: misc.h,v 1.76 2018/11/16 03:26:01 djm Exp $ */
+/* $OpenBSD: misc.h,v 1.77 2018/12/07 04:36:09 dtucker Exp $ */
 
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
@@ -135,7 +135,9 @@ void		put_u32_le(void *, u_int32_t)
 
 struct bwlimit {
         size_t buflen;
-        u_int64_t rate, thresh, lamt;
+        u_int64_t rate;         /* desired rate in kbit/s */
+        u_int64_t thresh;       /* threshold after which we'll check timers */
+        u_int64_t lamt;         /* amount written in last timer interval */
         struct timeval bwstart, bwend;
 };