Gitweb: http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=9b12e18cdc1553de62d931e73443c806347cd974 Commit: 9b12e18cdc1553de62d931e73443c806347cd974 Parent: bc71bec91f9875ef825d12104acf3bf4ca215fa4 Author: [EMAIL PROTECTED] <[EMAIL PROTECTED]> AuthorDate: Thu Jan 31 17:35:05 2008 -0800 Committer: Len Brown <[EMAIL PROTECTED]> CommitDate: Thu Feb 7 02:14:16 2008 -0500
ACPI: cpuidle: Support C1 idle time accounting Show C1 idle time in /sysfs cpuidle interface. C1 idle time may not be entirely accurate in all cases. It includes the time spent in the interrupt handler after wakeup with "hlt" based C1. But, it will be accurate with "mwait" based C1. Signed-off-by: Venkatesh Pallipadi <[EMAIL PROTECTED]> Signed-off-by: Len Brown <[EMAIL PROTECTED]> --- drivers/acpi/processor_idle.c | 7 ++++++- 1 files changed, 6 insertions(+), 1 deletions(-) diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c index 4ba3a9a..fea7159 100644 --- a/drivers/acpi/processor_idle.c +++ b/drivers/acpi/processor_idle.c @@ -1407,8 +1407,10 @@ static inline void acpi_idle_do_entry(struct acpi_processor_cx *cx) static int acpi_idle_enter_c1(struct cpuidle_device *dev, struct cpuidle_state *state) { + u32 t1, t2; struct acpi_processor *pr; struct acpi_processor_cx *cx = cpuidle_get_statedata(state); + pr = processors[smp_processor_id()]; if (unlikely(!pr)) @@ -1418,12 +1420,14 @@ static int acpi_idle_enter_c1(struct cpuidle_device *dev, if (pr->flags.bm_check) acpi_idle_update_bm_rld(pr, cx); + t1 = inl(acpi_gbl_FADT.xpm_timer_block.address); acpi_idle_do_entry(cx); + t2 = inl(acpi_gbl_FADT.xpm_timer_block.address); local_irq_enable(); cx->usage++; - return 0; + return ticks_elapsed_in_us(t1, t2); } /** @@ -1660,6 +1664,7 @@ static int acpi_processor_setup_cpuidle(struct acpi_processor *pr) switch (cx->type) { case ACPI_STATE_C1: state->flags |= CPUIDLE_FLAG_SHALLOW; + state->flags |= CPUIDLE_FLAG_TIME_VALID; state->enter = acpi_idle_enter_c1; dev->safe_state = state; break; - To unsubscribe from this list: send the line "unsubscribe git-commits-head" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html