* Ingo Molnar <[email protected]> wrote:
> * Andi Kleen <[email protected]> wrote:
>
> > > please send me your current sched-clock.c, i'll redo any remaining
> > > cleanups.
> >
> > It needs at least one new preliminary patch (to add on_cpu_single);
> > please get the series from
> > ftp://ftp.firstfloor.org/pub/ak/x86_64/quilt/patches-2.6.22-rc2-git7-070525-1.tar.gz
> > You need at least tsc-unstable upto paravirt-add-a-sched_clock-paravirt
> > for everything
>
> thanks.
>
> you missed one patch: please pick up the NUMAQ change i did too. (i
> kept the printk to make sure someone notices that and actually tests
> thing - i dont have a NUMAQ machine to try this on.)
>
> i'm looking at the other things now.
find below the cleanups from my first patch that didnt make it into your
cleanups. (plus one more cleanup i noticed while merging the missing
bits from my first patch) Goes after the bugfix i just sent. Please
apply.
Ingo
---------------------->
Subject: [patch] sched_clock(): cleanups, #2
From: Ingo Molnar <[email protected]>
clean up sched-clock.c - the missing bits.
Signed-off-by: Ingo Molnar <[email protected]>
---
arch/i386/kernel/sched-clock.c | 20 ++++++++++++++------
1 file changed, 14 insertions(+), 6 deletions(-)
Index: linux-cfs-2.6.22-rc2-mm1.q/arch/i386/kernel/sched-clock.c
===================================================================
--- linux-cfs-2.6.22-rc2-mm1.q.orig/arch/i386/kernel/sched-clock.c
+++ linux-cfs-2.6.22-rc2-mm1.q/arch/i386/kernel/sched-clock.c
@@ -89,8 +89,10 @@ unsigned long long native_sched_clock(vo
return r;
}
-/* We need to define a real function for sched_clock, to override the
- weak default version */
+/*
+ * We need to define a real function for sched_clock, to override the
+ * weak default version
+ */
#ifdef CONFIG_PARAVIRT
unsigned long long sched_clock(void)
{
@@ -119,6 +121,9 @@ static void resolve_freq(struct cpufreq_
{
if (!freq->new) {
freq->new = cpufreq_get(freq->cpu);
+ /*
+ * Still no frequency? Then fall back to tsc_khz:
+ */
if (!freq->new)
freq->new = tsc_khz;
}
@@ -129,6 +134,7 @@ static void resync_freq(void *arg)
{
struct cpufreq_freqs *freq = (void *)arg;
struct sc_data *sc = &__get_cpu_var(sc_data);
+
sc->sync_base = jiffies;
if (!cpu_has_tsc) {
sc->unstable = 1;
@@ -155,13 +161,14 @@ static void resync_freq(void *arg)
static void resync_freq_on_cpu(void *arg)
{
struct cpufreq_freqs f = { .new = 0 };
+
f.cpu = get_cpu();
resync_freq(&f);
put_cpu();
}
-static int sc_freq_event(struct notifier_block *nb, unsigned long event,
- void *data)
+static int
+sc_freq_event(struct notifier_block *nb, unsigned long event, void *data)
{
struct cpufreq_freqs *freq = data;
struct sc_data *sc;
@@ -210,8 +217,10 @@ static int __cpuinit
sc_cpu_event(struct notifier_block *self, unsigned long event, void *hcpu)
{
long cpu = (long)hcpu;
+
if (event == CPU_ONLINE) {
struct cpufreq_freqs f = { .cpu = cpu, .new = 0 };
+
on_cpu_single(cpu, resync_freq, &f);
}
return NOTIFY_DONE;
@@ -221,7 +230,6 @@ static __init int init_sched_clock(void)
{
if (unsynchronized_tsc())
no_sc_for_printk = 1;
-
/*
* On a race between the various events the initialization
* might be done multiple times, but code is tolerant to
@@ -231,7 +239,7 @@ static __init int init_sched_clock(void)
CPUFREQ_TRANSITION_NOTIFIER);
hotcpu_notifier(sc_cpu_event, 0);
on_each_cpu(resync_freq_on_cpu, NULL, 0, 0);
+
return 0;
}
core_initcall(init_sched_clock);
-
-
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