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ARM: tegra: cpuidle: Keep statistics on idle wake interrupts

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Change-Id: Ieaee455b4e52f232c5b1285756c22bcdc7fdc6b4
Signed-off-by: Colin Cross <ccross@android.com>
This commit is contained in:
Colin Cross
2010-10-23 15:55:32 -07:00
parent 1c83ad292d
commit dccfbe43e3
1 changed files with 21 additions and 11 deletions
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32
arch/arm/mach-tegra/cpuidle.c
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@@ -78,6 +78,8 @@ static struct {
unsigned int lp2_completed_count;
unsigned int lp2_count_bin[32];
unsigned int lp2_completed_count_bin[32];
unsigned int lp2_int_count[NR_IRQS];
unsigned int last_lp2_int_count[NR_IRQS];
} idle_stats;
struct cpuidle_driver tegra_idle = {
@@ -98,17 +100,7 @@ static DEFINE_PER_CPU(struct cpuidle_device *, idle_devices);
static inline unsigned int time_to_bin(unsigned int time)
{
unsigned int bin = 0;
int i;
for (i = 4; i >= 0; i--) {
if (time > (1 << (1 << i)) - 1) {
time >>= (1 << i);
bin += (1 << i);
}
}
return bin;
return fls(time);
}
static inline void tegra_unmask_irq(int irq)
@@ -308,6 +300,8 @@ restart:
if (tegra_suspend_lp2(sleep_time) == 0)
sleep_completed = true;
else
idle_stats.lp2_int_count[tegra_pending_interrupt()]++;
}
/* Bring CPU1 out of LP2 */
@@ -618,6 +612,7 @@ module_exit(tegra_cpuidle_exit);
static int tegra_lp2_debug_show(struct seq_file *s, void *data)
{
int bin;
int i;
seq_printf(s, " cpu0 cpu1\n");
seq_printf(s, "-------------------------------------------------\n");
seq_printf(s, "cpu ready: %8u %8u\n",
@@ -665,6 +660,21 @@ static int tegra_lp2_debug_show(struct seq_file *s, void *data)
idle_stats.lp2_count_bin[bin]);
}
seq_printf(s, "\n");
seq_printf(s, "%3s %20s %6s %10s\n",
"int", "name", "count", "last count");
seq_printf(s, "--------------------------------------------\n");
for (i = 0; i < NR_IRQS; i++) {
if (idle_stats.lp2_int_count[i] == 0)
continue;
seq_printf(s, "%3d %20s %6d %10d\n",
i, irq_to_desc(i)->action ?
irq_to_desc(i)->action->name ?: "???" : "???",
idle_stats.lp2_int_count[i],
idle_stats.lp2_int_count[i] -
idle_stats.last_lp2_int_count[i]);
idle_stats.last_lp2_int_count[i] = idle_stats.lp2_int_count[i];
};
return 0;
}