Read the TSC upon resuming and print it out. This is useful in helping figure out amount of time spent in the BIOS when resuming from suspend. Change-Id: I1d6a32bd62421becddecd152d561763e5f3e1101 Signed-off-by: Sameer Nanda <snanda@xxxxxxxxxxxx> --- drivers/acpi/sleep.c | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-) diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c index c0fed2e..f0588fa 100644 --- a/drivers/acpi/sleep.c +++ b/drivers/acpi/sleep.c @@ -214,6 +214,7 @@ static int acpi_suspend_enter(suspend_state_t pm_state) acpi_status status = AE_OK; unsigned long flags = 0; u32 acpi_state = acpi_target_sleep_state; + u64 tsc; ACPI_FLUSH_CPU_CACHE(); @@ -235,6 +236,9 @@ static int acpi_suspend_enter(suspend_state_t pm_state) case ACPI_STATE_S3: do_suspend_lowlevel(); + rdtscll(tsc); + printk(KERN_INFO "TSC at resume: %llu\n", + (unsigned long long)tsc); break; } -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
