Re: [PATCH 4/9] cpuidle: Introduce .abbr (abbrevation) for cpuidle states

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Thomas Renninger <trenn@xxxxxxx> writes:

> and fill name, description and newly introduced abbrevation
> consistently (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 abbrevations
> inside of the picture and the text must therefore be rather short.
>
> Signed-off-by: Thomas Renninger <trenn@xxxxxxx>
> CC: lenb@xxxxxxxxxx
> CC: linux-acpi@xxxxxxxxxxxxxxx
> CC: linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx
> CC: Arjan van de Ven <arjan@xxxxxxxxxxxxxxx>
> CC: Ingo Molnar <mingo@xxxxxxx>
> CC: Frederic Weisbecker <fweisbec@xxxxxxxxx>
> CC: linux-kernel@xxxxxxxxxxxxxxx
> CC: linux-omap@xxxxxxxxxxxxxxx
> ---
>  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(-)

For the davinci & OMAP changes,

Acked-by: Kevin Hilman <khilman@xxxxxx>


> 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 104ae77..b28693e 100644
> --- a/drivers/acpi/processor_idle.c
> +++ b/drivers/acpi/processor_idle.c
> @@ -1016,6 +1016,7 @@ 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;
> @@ -1026,6 +1027,7 @@ 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;
> @@ -1034,6 +1036,7 @@ 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 60fa6ec..3bb1f2b 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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