---

yaml --- r: 60427 b: refs/heads/master c: 5714d2d h: refs/heads/master i: 60425: 8cb3635 60423: dda887e v: v3
git-mirror · Jul 16, 2007 · 393e55f · 393e55f
1 parent cb48f5d
commit 393e55f
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Showing 2 changed files with 8 additions and 1 deletion.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: f9153ee6c71cb9ab38de3b8ed66b1c3fa27c3f7d
+refs/heads/master: 5714d2de93fbb156c5e45fb101a2b4f0cae8fbb7
diff --git a/trunk/kernel/sched.c b/trunk/kernel/sched.c
@@ -748,6 +748,13 @@ static const int prio_to_weight[40] = {
 /*  10 */   110,    87,    70,    56,    45,    36,    29,    23,    18,    15,
 };
 
+/*
+ * Inverse (2^32/x) values of the prio_to_weight[] array, precalculated.
+ *
+ * In cases where the weight does not change often, we can use the
+ * precalculated inverse to speed up arithmetics by turning divisions
+ * into multiplications:
+ */
 static const u32 prio_to_wmult[40] = {
 	48356,   60446,   75558,   94446,  118058,  147573,
 	184467,  230589,  288233,  360285,  450347,