diff options
| author | Colin Cross <ccross@android.com> | 2010-10-23 15:55:32 -0700 |
|---|---|---|
| committer | Colin Cross <ccross@android.com> | 2010-10-25 18:46:19 -0700 |
| commit | dccfbe43e365d393165a701687217fb2ca856d36 (patch) | |
| tree | 5bb7fb131e3355a5f99e183244f3efa95355ca58 | |
| parent | 1c83ad292d5671e4ce07a299f42f0fef7b8666e4 (diff) | |
ARM: tegra: cpuidle: Keep statistics on idle wake interrupts
Change-Id: Ieaee455b4e52f232c5b1285756c22bcdc7fdc6b4
Signed-off-by: Colin Cross <ccross@android.com>
| -rw-r--r-- | arch/arm/mach-tegra/cpuidle.c | 32 |
1 files changed, 21 insertions, 11 deletions
diff --git a/arch/arm/mach-tegra/cpuidle.c b/arch/arm/mach-tegra/cpuidle.c index fc1d2ab2cdda..765e368401aa 100644 --- a/arch/arm/mach-tegra/cpuidle.c +++ b/arch/arm/mach-tegra/cpuidle.c @@ -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; } |