Messages in this thread Patch in this message | | | Date | Tue, 28 Feb 2006 11:33:32 +0100 | From | Martin Andersson <> | Subject | [Patch] task interactivity calculation (was Strange interactivity behaviour) |
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The appended patch fixes the problem mentioned in http://lkml.org/lkml/2006/2/27/104 regarding wrong truncations in the calculation of task interactivity when the nice value is negative. The problem causes the interactivity to scale nonlinearly and differ from examples in the code.
/Martin Andersson
diff -uprN linux-2.6.15.4.orig/kernel/sched.c linux-2.6.15.4/kernel/sched.c --- linux-2.6.15.4.orig/kernel/sched.c 2006-02-10 08:22:48.000000000 +0100 +++ linux-2.6.15.4/kernel/sched.c 2006-02-28 11:10:30.000000000 +0100 @@ -142,7 +142,7 @@ (v1) * (v2_max) / (v1_max)
#define DELTA(p) \ - (SCALE(TASK_NICE(p), 40, MAX_BONUS) + INTERACTIVE_DELTA) + (SCALE(TASK_NICE(p)+20,40, MAX_BONUS)-20*MAX_BONUS/40+INTERACTIVE_DELTA)
#define TASK_INTERACTIVE(p) \ ((p)->prio <= (p)->static_prio - DELTA(p)) - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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