From 3a7891e26aec9e5d15d21a78cb317926d96f51e9 Mon Sep 17 00:00:00 2001
From: Simon Rettberg
Date: Fri, 26 Mar 2021 13:44:47 +0100
Subject: [KERNEL] Implement best_count logic for load balancing

Similar logic already exists in the fuse client:
Count how many times in a row a server was fastest when
measuring RTTs, and lower the switching threshold
more the higher the count gets.
---
 inc/dnbd3/config/client.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'inc')

diff --git a/inc/dnbd3/config/client.h b/inc/dnbd3/config/client.h
index f35f673..49d4676 100644
--- a/inc/dnbd3/config/client.h
+++ b/inc/dnbd3/config/client.h
@@ -8,7 +8,7 @@
 #define SOCKET_TIMEOUT_CLIENT_DATA 2
 #define SOCKET_TIMEOUT_CLIENT_DISCOVERY 1
 
-#define RTT_THRESHOLD_FACTOR(us) (((us) * 2) / 3) // 2/3 = current to best must be 33% worse
+#define RTT_THRESHOLD_FACTOR(us) (((us) * 3) / 4) // 3/4 = current to best must be 25% worse
 #define RTT_ABSOLUTE_THRESHOLD (80000) // Or 80ms worse
 #define RTT_UNREACHABLE 0x7FFFFFFul // Use this value for timeout/unreachable as RTT. Don't set too high or you might get overflows. 0x7FFFFFF = 134 seconds
 // This must be a power of two:
-- 
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