From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932506AbWFSVgZ (ORCPT ); Mon, 19 Jun 2006 17:36:25 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932543AbWFSVf5 (ORCPT ); Mon, 19 Jun 2006 17:35:57 -0400 Received: from isilmar.linta.de ([213.239.214.66]:38595 "EHLO linta.de") by vger.kernel.org with ESMTP id S932542AbWFSVfy (ORCPT ); Mon, 19 Jun 2006 17:35:54 -0400 Date: Mon, 19 Jun 2006 23:28:52 +0200 From: Dominik Brodowski To: Thomas Gleixner , len.brown@intel.com Cc: Con Kolivas , Ingo Molnar , LKML , Andrew Morton , john stultz Subject: [1/4] ACPI C-States: accounting of sleep states Message-ID: <20060619212852.GA12338@dominikbrodowski.de> Mail-Followup-To: Dominik Brodowski , Thomas Gleixner , len.brown@intel.com, Con Kolivas , Ingo Molnar , LKML , Andrew Morton , john stultz References: <1150643426.27073.17.camel@localhost.localdomain> <200606191521.05508.kernel@kolivas.org> <20060619122606.GA19451@elte.hu> <200606200003.26008.kernel@kolivas.org> <1150747611.29299.77.camel@localhost.localdomain> <20060619205718.GA26332@isilmar.linta.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20060619205718.GA26332@isilmar.linta.de> User-Agent: Mutt/1.5.11 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Track the actual time spent in C-States (C2 upwards, we can't determine this for C1), not only the number of invocations. This is especially useful for dynamic ticks / "tickless systems", but is also of interest on normal systems, as any interrupt activity leads to C-States being exited, not only the timer interrupt. The time is being measured in PM timer ticks, so an increase by one equals 279 nanoseconds. Signed-off-by: Dominik Brodowski --- drivers/acpi/processor_idle.c | 10 ++++++---- include/acpi/processor.h | 1 + 2 files changed, 7 insertions(+), 4 deletions(-) 3997a08ff5aa0553dfff81801c3690a5c91ac7bc diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c index 80fa434..4f166fa 100644 --- a/drivers/acpi/processor_idle.c +++ b/drivers/acpi/processor_idle.c @@ -322,8 +322,6 @@ static void acpi_processor_idle(void) cx = &pr->power.states[ACPI_STATE_C1]; #endif - cx->usage++; - /* * Sleep: * ------ @@ -421,6 +419,9 @@ static void acpi_processor_idle(void) local_irq_enable(); return; } + cx->usage++; + if ((cx->type != ACPI_STATE_C1) && (sleep_ticks > 0)) + cx->time += sleep_ticks; next_state = pr->power.state; @@ -1055,9 +1056,10 @@ static int acpi_processor_power_seq_show else seq_puts(seq, "demotion[--] "); - seq_printf(seq, "latency[%03d] usage[%08d]\n", + seq_printf(seq, "latency[%03d] usage[%08d] duration[%020llu]\n", pr->power.states[i].latency, - pr->power.states[i].usage); + pr->power.states[i].usage, + pr->power.states[i].time); } end: diff --git a/include/acpi/processor.h b/include/acpi/processor.h index badf027..ca0e031 100644 --- a/include/acpi/processor.h +++ b/include/acpi/processor.h @@ -51,6 +51,7 @@ struct acpi_processor_cx { u32 latency_ticks; u32 power; u32 usage; + u64 time; struct acpi_processor_cx_policy promotion; struct acpi_processor_cx_policy demotion; }; -- 1.2.4