The patch titled
Subject: sched: loadavg: consolidate LOAD_INT, LOAD_FRAC, CALC_LOAD
has been added to the -mm tree. Its filename is
sched-loadavg-consolidate-load_int-load_frac-calc_load.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/sched-loadavg-consolidate-load_int-load_frac-calc_load.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/sched-loadavg-consolidate-load_int-load_frac-calc_load.patch
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From: Johannes Weiner <hannes@xxxxxxxxxxx>
Subject: sched: loadavg: consolidate LOAD_INT, LOAD_FRAC, CALC_LOAD
There are several definitions of those functions/macros in places that
mess with fixed-point load averages. Provide an official version.
Link: http://lkml.kernel.org/r/20180712172942.10094-5-hannes@xxxxxxxxxxx
Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Christopher Lameter <cl@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Johannes Weiner <jweiner@xxxxxx>
Cc: Mike Galbraith <efault@xxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Shakeel Butt <shakeelb@xxxxxxxxxx>
Cc: Suren Baghdasaryan <surenb@xxxxxxxxxx>
Cc: Tejun Heo <tj@xxxxxxxxxx>
Cc: Vinayak Menon <vinmenon@xxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
diff -puN arch/powerpc/platforms/cell/cpufreq_spudemand.c~sched-loadavg-consolidate-load_int-load_frac-calc_load arch/powerpc/platforms/cell/cpufreq_spudemand.c
--- a/arch/powerpc/platforms/cell/cpufreq_spudemand.c~sched-loadavg-consolidate-load_int-load_frac-calc_load
+++ a/arch/powerpc/platforms/cell/cpufreq_spudemand.c
@@ -49,7 +49,7 @@ static int calc_freq(struct spu_gov_info
cpu = info->policy->cpu;
busy_spus = atomic_read(&cbe_spu_info[cpu_to_node(cpu)].busy_spus);
- CALC_LOAD(info->busy_spus, EXP, busy_spus * FIXED_1);
+ info->busy_spus = calc_load(info->busy_spus, EXP, busy_spus * FIXED_1);
pr_debug("cpu %d: busy_spus=%d, info->busy_spus=%ld\n",
cpu, busy_spus, info->busy_spus);
diff -puN arch/powerpc/platforms/cell/spufs/sched.c~sched-loadavg-consolidate-load_int-load_frac-calc_load arch/powerpc/platforms/cell/spufs/sched.c
--- a/arch/powerpc/platforms/cell/spufs/sched.c~sched-loadavg-consolidate-load_int-load_frac-calc_load
+++ a/arch/powerpc/platforms/cell/spufs/sched.c
@@ -987,9 +987,9 @@ static void spu_calc_load(void)
unsigned long active_tasks; /* fixed-point */
active_tasks = count_active_contexts() * FIXED_1;
- CALC_LOAD(spu_avenrun[0], EXP_1, active_tasks);
- CALC_LOAD(spu_avenrun[1], EXP_5, active_tasks);
- CALC_LOAD(spu_avenrun[2], EXP_15, active_tasks);
+ spu_avenrun[0] = calc_load(spu_avenrun[0], EXP_1, active_tasks);
+ spu_avenrun[1] = calc_load(spu_avenrun[1], EXP_5, active_tasks);
+ spu_avenrun[2] = calc_load(spu_avenrun[2], EXP_15, active_tasks);
}
static void spusched_wake(struct timer_list *unused)
@@ -1071,9 +1071,6 @@ void spuctx_switch_state(struct spu_cont
}
}
-#define LOAD_INT(x) ((x) >> FSHIFT)
-#define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)
-
static int show_spu_loadavg(struct seq_file *s, void *private)
{
int a, b, c;
diff -puN arch/s390/appldata/appldata_os.c~sched-loadavg-consolidate-load_int-load_frac-calc_load arch/s390/appldata/appldata_os.c
--- a/arch/s390/appldata/appldata_os.c~sched-loadavg-consolidate-load_int-load_frac-calc_load
+++ a/arch/s390/appldata/appldata_os.c
@@ -25,10 +25,6 @@
#include "appldata.h"
-
-#define LOAD_INT(x) ((x) >> FSHIFT)
-#define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)
-
/*
* OS data
*
diff -puN drivers/cpuidle/governors/menu.c~sched-loadavg-consolidate-load_int-load_frac-calc_load drivers/cpuidle/governors/menu.c
--- a/drivers/cpuidle/governors/menu.c~sched-loadavg-consolidate-load_int-load_frac-calc_load
+++ a/drivers/cpuidle/governors/menu.c
@@ -131,10 +131,6 @@ struct menu_device {
int interval_ptr;
};
-
-#define LOAD_INT(x) ((x) >> FSHIFT)
-#define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)
-
static inline int get_loadavg(unsigned long load)
{
return LOAD_INT(load) * 10 + LOAD_FRAC(load) / 10;
diff -puN fs/proc/loadavg.c~sched-loadavg-consolidate-load_int-load_frac-calc_load fs/proc/loadavg.c
--- a/fs/proc/loadavg.c~sched-loadavg-consolidate-load_int-load_frac-calc_load
+++ a/fs/proc/loadavg.c
@@ -10,9 +10,6 @@
#include <linux/seqlock.h>
#include <linux/time.h>
-#define LOAD_INT(x) ((x) >> FSHIFT)
-#define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)
-
static int loadavg_proc_show(struct seq_file *m, void *v)
{
unsigned long avnrun[3];
diff -puN include/linux/sched/loadavg.h~sched-loadavg-consolidate-load_int-load_frac-calc_load include/linux/sched/loadavg.h
--- a/include/linux/sched/loadavg.h~sched-loadavg-consolidate-load_int-load_frac-calc_load
+++ a/include/linux/sched/loadavg.h
@@ -22,10 +22,23 @@ extern void get_avenrun(unsigned long *l
#define EXP_5 2014 /* 1/exp(5sec/5min) */
#define EXP_15 2037 /* 1/exp(5sec/15min) */
-#define CALC_LOAD(load,exp,n) \
- load *= exp; \
- load += n*(FIXED_1-exp); \
- load >>= FSHIFT;
+/*
+ * a1 = a0 * e + a * (1 - e)
+ */
+static inline unsigned long
+calc_load(unsigned long load, unsigned long exp, unsigned long active)
+{
+ unsigned long newload;
+
+ newload = load * exp + active * (FIXED_1 - exp);
+ if (active >= load)
+ newload += FIXED_1-1;
+
+ return newload / FIXED_1;
+}
+
+#define LOAD_INT(x) ((x) >> FSHIFT)
+#define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)
extern void calc_global_load(unsigned long ticks);
diff -puN kernel/debug/kdb/kdb_main.c~sched-loadavg-consolidate-load_int-load_frac-calc_load kernel/debug/kdb/kdb_main.c
--- a/kernel/debug/kdb/kdb_main.c~sched-loadavg-consolidate-load_int-load_frac-calc_load
+++ a/kernel/debug/kdb/kdb_main.c
@@ -2556,16 +2556,11 @@ static int kdb_summary(int argc, const c
}
kdb_printf("%02ld:%02ld\n", val.uptime/(60*60), (val.uptime/60)%60);
- /* lifted from fs/proc/proc_misc.c::loadavg_read_proc() */
-
-#define LOAD_INT(x) ((x) >> FSHIFT)
-#define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)
kdb_printf("load avg %ld.%02ld %ld.%02ld %ld.%02ld\n",
LOAD_INT(val.loads[0]), LOAD_FRAC(val.loads[0]),
LOAD_INT(val.loads[1]), LOAD_FRAC(val.loads[1]),
LOAD_INT(val.loads[2]), LOAD_FRAC(val.loads[2]));
-#undef LOAD_INT
-#undef LOAD_FRAC
+
/* Display in kilobytes */
#define K(x) ((x) << (PAGE_SHIFT - 10))
kdb_printf("\nMemTotal: %8lu kB\nMemFree: %8lu kB\n"
diff -puN kernel/sched/loadavg.c~sched-loadavg-consolidate-load_int-load_frac-calc_load kernel/sched/loadavg.c
--- a/kernel/sched/loadavg.c~sched-loadavg-consolidate-load_int-load_frac-calc_load
+++ a/kernel/sched/loadavg.c
@@ -91,21 +91,6 @@ long calc_load_fold_active(struct rq *th
return delta;
}
-/*
- * a1 = a0 * e + a * (1 - e)
- */
-static unsigned long
-calc_load(unsigned long load, unsigned long exp, unsigned long active)
-{
- unsigned long newload;
-
- newload = load * exp + active * (FIXED_1 - exp);
- if (active >= load)
- newload += FIXED_1-1;
-
- return newload / FIXED_1;
-}
-
#ifdef CONFIG_NO_HZ_COMMON
/*
* Handle NO_HZ for the global load-average.
_
Patches currently in -mm which might be from hannes@xxxxxxxxxxx are
mm-workingset-tell-cache-transitions-from-workingset-thrashing.patch
delayacct-track-delays-from-thrashing-cache-pages.patch
sched-loadavg-consolidate-load_int-load_frac-calc_load.patch
sched-loadavg-make-calc_load_n-public.patch
sched-schedh-make-rq-locking-and-clock-functions-available-in-statsh.patch
sched-introduce-this_rq_lock_irq.patch
psi-pressure-stall-information-for-cpu-memory-and-io.patch
psi-cgroup-support.patch
psi-aggregate-ongoing-stall-events-when-somebody-reads-pressure.patch
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