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Message-Id: <1286406919-6236-1-git-send-email-snanda@chromium.org> Date: Wed, 6 Oct 2010 16:15:19 -0700 From: Sameer Nanda <snanda@...omium.org> To: lenb@...nel.org, stefan.bader@...onical.com, brad.figg@...onical.com, gregkh@...e.de, apw@...onical.com Cc: linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org, Sameer Nanda <snanda@...omium.org> Subject: [PATCH] ACPI: Read TSC upon resume 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@...omium.org> --- 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-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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