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SubjectRe: [patch 2.6.16-mm2 9/9] sched throttle tree extract - export tunables
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This patch is a convenience for people testing this patch series.  It
exports throttling tunables to userland, and is utterly disposable.

Signed-off-by: Mike Galbraith <efault@gmx.de>

--- linux-2.6.16-mm2/include/linux/sysctl.h.org 2006-03-31 11:25:16.000000000 +0200
+++ linux-2.6.16-mm2/include/linux/sysctl.h 2006-03-31 14:08:28.000000000 +0200
@@ -148,6 +148,8 @@ enum
KERN_SPIN_RETRY=70, /* int: number of spinlock retries */
KERN_ACPI_VIDEO_FLAGS=71, /* int: flags for setting up video after ACPI sleep */
KERN_IA64_UNALIGNED=72, /* int: ia64 unaligned userland trap enable */
+ KERN_SCHED_THROTTLE1=73, /* int: throttling credit period 1 in secs */
+ KERN_SCHED_THROTTLE2=74, /* int: throttling credit period 2 in secs */
};


--- linux-2.6.16-mm2/kernel/sysctl.c.org 2006-03-31 11:24:50.000000000 +0200
+++ linux-2.6.16-mm2/kernel/sysctl.c 2006-03-31 14:08:28.000000000 +0200
@@ -73,6 +73,9 @@ extern int printk_ratelimit_burst;
extern int pid_max_min, pid_max_max;
extern int sysctl_drop_caches;
extern int percpu_pagelist_fraction;
+extern int credit_c1;
+extern int credit_c2;
+extern int credit_max;

#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86)
int unknown_nmi_panic;
@@ -230,6 +233,11 @@ static ctl_table root_table[] = {
{ .ctl_name = 0 }
};

+/* Constants for minimum and maximum testing in vm_table and
+ * kern_table. We use these as one-element integer vectors. */
+static int zero;
+static int one_hundred = 100;
+
static ctl_table kern_table[] = {
{
.ctl_name = KERN_OSTYPE,
@@ -684,15 +692,31 @@ static ctl_table kern_table[] = {
.proc_handler = &proc_dointvec,
},
#endif
+ {
+ .ctl_name = KERN_SCHED_THROTTLE1,
+ .procname = "credit_c1",
+ .data = &credit_c1,
+ .maxlen = sizeof (int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_minmax,
+ .strategy = &sysctl_intvec,
+ .extra1 = &zero,
+ .extra2 = &credit_max,
+ },
+ {
+ .ctl_name = KERN_SCHED_THROTTLE2,
+ .procname = "credit_c2",
+ .data = &credit_c2,
+ .maxlen = sizeof (int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_minmax,
+ .strategy = &sysctl_intvec,
+ .extra1 = &zero,
+ .extra2 = &credit_max,
+ },
{ .ctl_name = 0 }
};

-/* Constants for minimum and maximum testing in vm_table.
- We use these as one-element integer vectors. */
-static int zero;
-static int one_hundred = 100;
-
-
static ctl_table vm_table[] = {
{
.ctl_name = VM_OVERCOMMIT_MEMORY,
--- linux-2.6.16-mm2/kernel/sched.c-8.slice_accounting 2006-03-24 09:40:33.000000000 +0100
+++ linux-2.6.16-mm2/kernel/sched.c 2006-03-24 09:51:06.000000000 +0100
@@ -220,11 +220,12 @@ static int task_interactive_idle(task_t
* credit that fits in 32 bits jiffies is 42949 seconds.
*/

-#define CREDIT_C1 10
-#define CREDIT_C2 14400
+int credit_c1 = 10;
+int credit_c2 = 14400;
+int credit_max = 42949;

-#define C1 (CREDIT_C1 * MAX_BONUS * HZ)
-#define C2 (CREDIT_C2 * MAX_BONUS * HZ + C1)
+#define C1 (credit_c1 * MAX_BONUS * HZ)
+#define C2 (credit_c2 * MAX_BONUS * HZ + C1)
#define C3 (MAX_BONUS * C2)

#define credit_exhausted(p, credit) \

-
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