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Date: Thu, 2 Dec 2010 10:33:05 -0700
From: Bjorn Helgaas <bjorn.helgaas@...com>
To: Thomas Renninger <trenn@...e.de>
Cc: lenb@...nel.org, linux-acpi@...r.kernel.org,
linux-pm@...ts.linux-foundation.org,
Arjan van de Ven <arjan@...ux.intel.com>,
Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org,
linux-omap@...r.kernel.org
Subject: Re: [PATCH 5/8] cpuidle: Introduce .abbr (abbrevation) for cpuidle states
On Thursday, December 02, 2010 09:42:25 am Thomas Renninger wrote:
> and fill name, description and newly introduced abbrivation
> consistenly (always use snprintf) in all cpuidle drivers.
>
> This is mainly for perf timechart. It draws vector graphics
> pictures of sleep/idle state usage catching perf cpu_idle events.
> The string used for the idle state must not exceed 3 chars or
> you can't see much in these pictures.
> The name could get used in the title, the introduced abbrivations
> inside of the picture and the text must therefore be rather short.
s/abbrivation/abbreviation/g above.
s/consistenly/consistently/
> Signed-off-by: Thomas Renninger <trenn@...e.de>
> CC: lenb@...nel.org
> CC: linux-acpi@...r.kernel.org
> CC: linux-pm@...ts.linux-foundation.org
> CC: Arjan van de Ven <arjan@...ux.intel.com>
> CC: Ingo Molnar <mingo@...e.hu>
> CC: linux-kernel@...r.kernel.org
> CC: linux-omap@...r.kernel.org
> ---
> arch/arm/mach-at91/cpuidle.c | 12 ++++++++----
> arch/arm/mach-davinci/cpuidle.c | 13 +++++++++----
> arch/arm/mach-kirkwood/cpuidle.c | 12 ++++++++----
> arch/arm/mach-omap2/cpuidle34xx.c | 3 ++-
> arch/sh/kernel/cpu/shmobile/cpuidle.c | 19 +++++++++++--------
> drivers/acpi/processor_idle.c | 3 +++
> drivers/cpuidle/cpuidle.c | 1 +
> drivers/cpuidle/sysfs.c | 3 +++
> drivers/idle/intel_idle.c | 11 +++++++++++
> include/linux/cpuidle.h | 2 ++
> 10 files changed, 58 insertions(+), 21 deletions(-)
>
> diff --git a/arch/arm/mach-at91/cpuidle.c b/arch/arm/mach-at91/cpuidle.c
> index 1cfeac1..6cdeb42 100644
> --- a/arch/arm/mach-at91/cpuidle.c
> +++ b/arch/arm/mach-at91/cpuidle.c
> @@ -73,16 +73,20 @@ static int at91_init_cpuidle(void)
> device->states[0].exit_latency = 1;
> device->states[0].target_residency = 10000;
> device->states[0].flags = CPUIDLE_FLAG_TIME_VALID;
> - strcpy(device->states[0].name, "WFI");
> - strcpy(device->states[0].desc, "Wait for interrupt");
> + snprintf(device->states[0].name, CPUIDLE_NAME_LEN, "WFI");
> + snprintf(device->states[0].desc, CPUIDLE_DESC_LEN,
> + "Wait for interrupt");
> + snprintf(device->states[0].abbr, CPUIDLE_ABBR_LEN, "W");
>
> /* Wait for interrupt and RAM self refresh state */
> device->states[1].enter = at91_enter_idle;
> device->states[1].exit_latency = 10;
> device->states[1].target_residency = 10000;
> device->states[1].flags = CPUIDLE_FLAG_TIME_VALID;
> - strcpy(device->states[1].name, "RAM_SR");
> - strcpy(device->states[1].desc, "WFI and RAM Self Refresh");
> + snprintf(device->states[1].name, CPUIDLE_NAME_LEN, "RAM SR");
> + snprintf(device->states[1].desc, CPUIDLE_DESC_LEN,
> + "WFI and RAM Self Refresh");
> + snprintf(device->states[1].abbr, CPUIDLE_ABBR_LEN, "WSR");
>
> if (cpuidle_register_device(device)) {
> printk(KERN_ERR "at91_init_cpuidle: Failed registering\n");
> diff --git a/arch/arm/mach-davinci/cpuidle.c b/arch/arm/mach-davinci/cpuidle.c
> index bd59f31..42ad2d6 100644
> --- a/arch/arm/mach-davinci/cpuidle.c
> +++ b/arch/arm/mach-davinci/cpuidle.c
> @@ -127,16 +127,21 @@ static int __init davinci_cpuidle_probe(struct platform_device *pdev)
> device->states[0].exit_latency = 1;
> device->states[0].target_residency = 10000;
> device->states[0].flags = CPUIDLE_FLAG_TIME_VALID;
> - strcpy(device->states[0].name, "WFI");
> - strcpy(device->states[0].desc, "Wait for interrupt");
> + snprintf(device->states[0].name, CPUIDLE_NAME_LEN, "WFI");
> + snprintf(device->states[0].desc, CPUIDLE_DESC_LEN,
> + "Wait for interrupt");
> + snprintf(device->states[0].abbr, CPUIDLE_ABBR_LEN, "W");
>
> /* Wait for interrupt and DDR self refresh state */
> device->states[1].enter = davinci_enter_idle;
> device->states[1].exit_latency = 10;
> device->states[1].target_residency = 10000;
> device->states[1].flags = CPUIDLE_FLAG_TIME_VALID;
> - strcpy(device->states[1].name, "DDR SR");
> - strcpy(device->states[1].desc, "WFI and DDR Self Refresh");
> + snprintf(device->states[1].name, CPUIDLE_NAME_LEN, "RAM SR");
> + snprintf(device->states[1].desc, CPUIDLE_DESC_LEN,
> + "WFI and RAM Self Refresh");
> + snprintf(device->states[1].abbr, CPUIDLE_ABBR_LEN, "WSR");
> +
> if (pdata->ddr2_pdown)
> davinci_states[1].flags |= DAVINCI_CPUIDLE_FLAGS_DDR2_PWDN;
> cpuidle_set_statedata(&device->states[1], &davinci_states[1]);
> diff --git a/arch/arm/mach-kirkwood/cpuidle.c b/arch/arm/mach-kirkwood/cpuidle.c
> index f68d33f..48eaabb 100644
> --- a/arch/arm/mach-kirkwood/cpuidle.c
> +++ b/arch/arm/mach-kirkwood/cpuidle.c
> @@ -75,16 +75,20 @@ static int kirkwood_init_cpuidle(void)
> device->states[0].exit_latency = 1;
> device->states[0].target_residency = 10000;
> device->states[0].flags = CPUIDLE_FLAG_TIME_VALID;
> - strcpy(device->states[0].name, "WFI");
> - strcpy(device->states[0].desc, "Wait for interrupt");
> + snprintf(device->states[0].name, CPUIDLE_NAME_LEN, "WFI");
> + snprintf(device->states[0].desc, CPUIDLE_DESC_LEN,
> + "Wait for interrupt");
> + snprintf(device->states[0].abbr, CPUIDLE_ABBR_LEN, "W");
>
> /* Wait for interrupt and DDR self refresh state */
> device->states[1].enter = kirkwood_enter_idle;
> device->states[1].exit_latency = 10;
> device->states[1].target_residency = 10000;
> device->states[1].flags = CPUIDLE_FLAG_TIME_VALID;
> - strcpy(device->states[1].name, "DDR SR");
> - strcpy(device->states[1].desc, "WFI and DDR Self Refresh");
> + snprintf(device->states[1].name, CPUIDLE_NAME_LEN, "RAM SR");
> + snprintf(device->states[1].desc, CPUIDLE_DESC_LEN,
> + "WFI and RAM Self Refresh");
> + snprintf(device->states[1].abbr, CPUIDLE_ABBR_LEN, "WSR");
>
> if (cpuidle_register_device(device)) {
> printk(KERN_ERR "kirkwood_init_cpuidle: Failed registering\n");
> diff --git a/arch/arm/mach-omap2/cpuidle34xx.c b/arch/arm/mach-omap2/cpuidle34xx.c
> index 0d50b45..a59ac39 100644
> --- a/arch/arm/mach-omap2/cpuidle34xx.c
> +++ b/arch/arm/mach-omap2/cpuidle34xx.c
> @@ -496,7 +496,8 @@ int __init omap3_idle_init(void)
> omap3_enter_idle_bm : omap3_enter_idle;
> if (cx->type == OMAP3_STATE_C1)
> dev->safe_state = state;
> - sprintf(state->name, "C%d", count+1);
> + snprintf(state->name, CPUIDLE_NAME_LEN, "C%d", count+1);
> + snprintf(state->abbr, CPUIDLE_ABBR_LEN, "C%d", count+1);
> count++;
> }
>
> diff --git a/arch/sh/kernel/cpu/shmobile/cpuidle.c b/arch/sh/kernel/cpu/shmobile/cpuidle.c
> index 83972aa..9ad151d 100644
> --- a/arch/sh/kernel/cpu/shmobile/cpuidle.c
> +++ b/arch/sh/kernel/cpu/shmobile/cpuidle.c
> @@ -75,8 +75,9 @@ void sh_mobile_setup_cpuidle(void)
> i = CPUIDLE_DRIVER_STATE_START;
>
> state = &dev->states[i++];
> - snprintf(state->name, CPUIDLE_NAME_LEN, "C0");
> - strncpy(state->desc, "SuperH Sleep Mode", CPUIDLE_DESC_LEN);
> + snprintf(state->name, CPUIDLE_NAME_LEN, "SuperH");
> + snprintf(state->desc, CPUIDLE_DESC_LEN, "SuperH Sleep Mode");
> + snprintf(state->abbr, CPUIDLE_ABBR_LEN, "SH");
> state->exit_latency = 1;
> state->target_residency = 1 * 2;
> state->power_usage = 3;
> @@ -89,9 +90,10 @@ void sh_mobile_setup_cpuidle(void)
>
> if (sh_mobile_sleep_supported & SUSP_SH_SF) {
> state = &dev->states[i++];
> - snprintf(state->name, CPUIDLE_NAME_LEN, "C1");
> - strncpy(state->desc, "SuperH Sleep Mode [SF]",
> - CPUIDLE_DESC_LEN);
> + snprintf(state->name, CPUIDLE_NAME_LEN, "SuperH [SF]");
> + snprintf(state->desc, CPUIDLE_DESC_LEN,
> + "SuperH Sleep Mode [SF]");
> + snprintf(state->abbr, CPUIDLE_ABBR_LEN, "SHF");
> state->exit_latency = 100;
> state->target_residency = 1 * 2;
> state->power_usage = 1;
> @@ -102,9 +104,10 @@ void sh_mobile_setup_cpuidle(void)
>
> if (sh_mobile_sleep_supported & SUSP_SH_STANDBY) {
> state = &dev->states[i++];
> - snprintf(state->name, CPUIDLE_NAME_LEN, "C2");
> - strncpy(state->desc, "SuperH Mobile Standby Mode [SF]",
> - CPUIDLE_DESC_LEN);
> + snprintf(state->name, CPUIDLE_NAME_LEN, "SuperH Standby [SF]");
> + snprintf(state->desc, CPUIDLE_DESC_LEN,
> + "SuperH Mobile Standby Mode [SF]");
> + snprintf(state->abbr, CPUIDLE_ABBR_LEN, "SHS");
> state->exit_latency = 2300;
> state->target_residency = 1 * 2;
> state->power_usage = 1;
> diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
> index dda3412..e74f72c 100644
> --- a/drivers/acpi/processor_idle.c
> +++ b/drivers/acpi/processor_idle.c
> @@ -1023,6 +1023,7 @@ static int acpi_processor_setup_cpuidle(struct acpi_processor *pr)
> switch (cx->type) {
> case ACPI_STATE_C1:
> snprintf(state->name, CPUIDLE_NAME_LEN, "C1");
> + snprintf(state->abbr, CPUIDLE_ABBR_LEN, "C1");
> state->flags |= CPUIDLE_FLAG_SHALLOW;
> if (cx->entry_method == ACPI_CSTATE_FFH)
> state->flags |= CPUIDLE_FLAG_TIME_VALID;
> @@ -1033,6 +1034,7 @@ static int acpi_processor_setup_cpuidle(struct acpi_processor *pr)
>
> case ACPI_STATE_C2:
> snprintf(state->name, CPUIDLE_NAME_LEN, "C2");
> + snprintf(state->abbr, CPUIDLE_ABBR_LEN, "C2");
> state->flags |= CPUIDLE_FLAG_BALANCED;
> state->flags |= CPUIDLE_FLAG_TIME_VALID;
> state->enter = acpi_idle_enter_simple;
> @@ -1041,6 +1043,7 @@ static int acpi_processor_setup_cpuidle(struct acpi_processor *pr)
>
> case ACPI_STATE_C3:
> snprintf(state->name, CPUIDLE_NAME_LEN, "C3");
> + snprintf(state->abbr, CPUIDLE_ABBR_LEN, "C3");
> state->flags |= CPUIDLE_FLAG_DEEP;
> state->flags |= CPUIDLE_FLAG_TIME_VALID;
> state->flags |= CPUIDLE_FLAG_CHECK_BM;
> diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
> index 4649495..b2d2b69 100644
> --- a/drivers/cpuidle/cpuidle.c
> +++ b/drivers/cpuidle/cpuidle.c
> @@ -268,6 +268,7 @@ static void poll_idle_init(struct cpuidle_device *dev)
>
> snprintf(state->name, CPUIDLE_NAME_LEN, "POLL");
> snprintf(state->desc, CPUIDLE_DESC_LEN, "CPUIDLE CORE POLL IDLE");
> + snprintf(state->abbr, CPUIDLE_ABBR_LEN, "P");
> state->exit_latency = 0;
> state->target_residency = 0;
> state->power_usage = -1;
> diff --git a/drivers/cpuidle/sysfs.c b/drivers/cpuidle/sysfs.c
> index 0310ffa..ca7a62c 100644
> --- a/drivers/cpuidle/sysfs.c
> +++ b/drivers/cpuidle/sysfs.c
> @@ -249,9 +249,11 @@ define_show_state_ull_function(usage)
> define_show_state_ull_function(time)
> define_show_state_str_function(name)
> define_show_state_str_function(desc)
> +define_show_state_str_function(abbr)
>
> define_one_state_ro(name, show_state_name);
> define_one_state_ro(desc, show_state_desc);
> +define_one_state_ro(abbr, show_state_abbr);
> define_one_state_ro(latency, show_state_exit_latency);
> define_one_state_ro(power, show_state_power_usage);
> define_one_state_ro(usage, show_state_usage);
> @@ -260,6 +262,7 @@ define_one_state_ro(time, show_state_time);
> static struct attribute *cpuidle_state_default_attrs[] = {
> &attr_name.attr,
> &attr_desc.attr,
> + &attr_abbr.attr,
> &attr_latency.attr,
> &attr_power.attr,
> &attr_usage.attr,
> diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c
> index f0798ff..b2954a0 100644
> --- a/drivers/idle/intel_idle.c
> +++ b/drivers/idle/intel_idle.c
> @@ -91,6 +91,7 @@ static struct cpuidle_state nehalem_cstates[MWAIT_MAX_NUM_CSTATES] = {
> { /* MWAIT C1 */
> .name = "NHM-C1",
> .desc = "MWAIT 0x00",
> + .abbr = "C1",
> .driver_data = (void *) 0x00,
> .flags = CPUIDLE_FLAG_TIME_VALID,
> .exit_latency = 3,
> @@ -99,6 +100,7 @@ static struct cpuidle_state nehalem_cstates[MWAIT_MAX_NUM_CSTATES] = {
> { /* MWAIT C2 */
> .name = "NHM-C3",
> .desc = "MWAIT 0x10",
> + .abbr = "C3",
> .driver_data = (void *) 0x10,
> .flags = CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
> .exit_latency = 20,
> @@ -107,6 +109,7 @@ static struct cpuidle_state nehalem_cstates[MWAIT_MAX_NUM_CSTATES] = {
> { /* MWAIT C3 */
> .name = "NHM-C6",
> .desc = "MWAIT 0x20",
> + .abbr = "C6",
> .driver_data = (void *) 0x20,
> .flags = CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
> .exit_latency = 200,
> @@ -119,6 +122,7 @@ static struct cpuidle_state snb_cstates[MWAIT_MAX_NUM_CSTATES] = {
> { /* MWAIT C1 */
> .name = "SNB-C1",
> .desc = "MWAIT 0x00",
> + .abbr = "C1",
> .driver_data = (void *) 0x00,
> .flags = CPUIDLE_FLAG_TIME_VALID,
> .exit_latency = 1,
> @@ -127,6 +131,7 @@ static struct cpuidle_state snb_cstates[MWAIT_MAX_NUM_CSTATES] = {
> { /* MWAIT C2 */
> .name = "SNB-C3",
> .desc = "MWAIT 0x10",
> + .abbr = "C3",
> .driver_data = (void *) 0x10,
> .flags = CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
> .exit_latency = 80,
> @@ -135,6 +140,7 @@ static struct cpuidle_state snb_cstates[MWAIT_MAX_NUM_CSTATES] = {
> { /* MWAIT C3 */
> .name = "SNB-C6",
> .desc = "MWAIT 0x20",
> + .abbr = "C6",
> .driver_data = (void *) 0x20,
> .flags = CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
> .exit_latency = 104,
> @@ -143,6 +149,7 @@ static struct cpuidle_state snb_cstates[MWAIT_MAX_NUM_CSTATES] = {
> { /* MWAIT C4 */
> .name = "SNB-C7",
> .desc = "MWAIT 0x30",
> + .abbr = "C7",
> .driver_data = (void *) 0x30,
> .flags = CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
> .exit_latency = 109,
> @@ -155,6 +162,7 @@ static struct cpuidle_state atom_cstates[MWAIT_MAX_NUM_CSTATES] = {
> { /* MWAIT C1 */
> .name = "ATM-C1",
> .desc = "MWAIT 0x00",
> + .abbr = "C1",
> .driver_data = (void *) 0x00,
> .flags = CPUIDLE_FLAG_TIME_VALID,
> .exit_latency = 1,
> @@ -163,6 +171,7 @@ static struct cpuidle_state atom_cstates[MWAIT_MAX_NUM_CSTATES] = {
> { /* MWAIT C2 */
> .name = "ATM-C2",
> .desc = "MWAIT 0x10",
> + .abbr = "C2",
> .driver_data = (void *) 0x10,
> .flags = CPUIDLE_FLAG_TIME_VALID,
> .exit_latency = 20,
> @@ -172,6 +181,7 @@ static struct cpuidle_state atom_cstates[MWAIT_MAX_NUM_CSTATES] = {
> { /* MWAIT C4 */
> .name = "ATM-C4",
> .desc = "MWAIT 0x30",
> + .abbr = "C4",
> .driver_data = (void *) 0x30,
> .flags = CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
> .exit_latency = 100,
> @@ -181,6 +191,7 @@ static struct cpuidle_state atom_cstates[MWAIT_MAX_NUM_CSTATES] = {
> { /* MWAIT C6 */
> .name = "ATM-C6",
> .desc = "MWAIT 0x52",
> + .abbr = "C6",
> .driver_data = (void *) 0x52,
> .flags = CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_TLB_FLUSHED,
> .exit_latency = 140,
> diff --git a/include/linux/cpuidle.h b/include/linux/cpuidle.h
> index 1be416b..4763ef3 100644
> --- a/include/linux/cpuidle.h
> +++ b/include/linux/cpuidle.h
> @@ -20,6 +20,7 @@
> #define CPUIDLE_STATE_MAX 8
> #define CPUIDLE_NAME_LEN 16
> #define CPUIDLE_DESC_LEN 32
> +#define CPUIDLE_ABBR_LEN 3
>
> struct cpuidle_device;
>
> @@ -31,6 +32,7 @@ struct cpuidle_device;
> struct cpuidle_state {
> char name[CPUIDLE_NAME_LEN];
> char desc[CPUIDLE_DESC_LEN];
> + char abbr[CPUIDLE_ABBR_LEN];
> void *driver_data;
>
> unsigned int flags;
>
--
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