From d1f39c38df5aee6df6661bcae2c2ca9f79428a8f Mon Sep 17 00:00:00 2001
From: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date: Mon, 19 Nov 2018 00:50:35 +0100
Subject: Make scheduling more reactive

Give smaller quantums to processes, to get more frequent context
switches. This fixes some reactivity for concurrent processes.

* kern/sched.h (MIN_QUANTUM): Define to hz / 33.
* kern/sched_prim.c (sched_init): Use MIN_QUANTUM instead of hz / 10.
---
 kern/sched.h | 1 +
 1 file changed, 1 insertion(+)

(limited to 'kern/sched.h')

diff --git a/kern/sched.h b/kern/sched.h
index c401f0f5..8a4ec75b 100644
--- a/kern/sched.h
+++ b/kern/sched.h
@@ -113,6 +113,7 @@ extern queue_head_t	action_queue;	/* assign/shutdown queue */
 decl_simple_lock_data(extern,action_lock);
 
 extern int		min_quantum;	/* defines max context switch rate */
+#define MIN_QUANTUM	(hz / 33)	/* context switch 33 times/second */
 
 /*
  *	Default base priorities for threads.
-- 
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