From: Mike Perry <mikeperry-git@torproject.org>
Date: Fri, 21 Jan 2022 18:09:48 +0000 (+0000)
Subject: Increase RTT ratio used to detect monotime jumps/stalls.
X-Git-Tag: tor-0.4.7.4-alpha~21
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8052d0c2c08ac227aaee1134a52d5a3993ba4b10;p=thirdparty%2Ftor.git

Increase RTT ratio used to detect monotime jumps/stalls.

In Shadow, we saw RTT jumps as high as 1000 naturally.

So let's set this to 5000, to give us some breathing room.
---

diff --git a/src/core/or/congestion_control_common.c b/src/core/or/congestion_control_common.c
index 6fa3bb9a11..fe3228262a 100644
--- a/src/core/or/congestion_control_common.c
+++ b/src/core/or/congestion_control_common.c
@@ -698,7 +698,7 @@ static bool
 time_delta_stalled_or_jumped(const congestion_control_t *cc,
                              uint64_t old_delta, uint64_t new_delta)
 {
-#define DELTA_DISCREPENCY_RATIO_MAX 100
+#define DELTA_DISCREPENCY_RATIO_MAX 5000
   /* If we have a 0 new_delta, that is definitely a monotime stall */
   if (new_delta == 0) {
     static ratelim_t stall_info_limit = RATELIM_INIT(60);