linux-kernel - Re: [PATCH] tools/power turbostat: fix output formatting for ACPI CST enumeration

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Date:   Tue, 18 Aug 2020 09:17:49 -0400
From:   David Arcari <darcari@...hat.com>
To:     linux-pm@...r.kernel.org
Cc:     Len Brown <lenb@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] tools/power turbostat: fix output formatting for ACPI CST
 enumeration


Hi,

Just want to make sure that this doesn't get lost.

Please let me know if you feel there is a better approach.

Thanks,

-Dave

On 8/10/20 10:43 AM, David Arcari wrote:
> turbostat formatting is broken with ACPI CST for enumeration.  The
> problem is that the CX_ACPI% is eight characters long which does not
> work with tab formatting.  One simple solution is to remove the underbar
> from the state name such that C1_ACPI will be displayed as C1ACPI.
> 
> Signed-off-by: David Arcari <darcari@...hat.com>
> Cc: Len Brown <lenb@...nel.org>
> Cc: linux-kernel@...r.kernel.org
> ---
>   tools/power/x86/turbostat/turbostat.c | 20 ++++++++++++++++++++
>   1 file changed, 20 insertions(+)
> 
> diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c
> index 33b370865d16..5f074879cc0a 100644
> --- a/tools/power/x86/turbostat/turbostat.c
> +++ b/tools/power/x86/turbostat/turbostat.c
> @@ -3474,6 +3474,20 @@ int has_config_tdp(unsigned int family, unsigned int model)
>   	}
>   }
>   
> +static void
> +remove_underbar(char *s)
> +{
> +	char *to = s;
> +
> +	while (*s) {
> +		if (*s != '_')
> +			*to++ = *s;
> +		s++;
> +	}
> +
> +	*to = 0;
> +}
> +
>   static void
>   dump_cstate_pstate_config_info(unsigned int family, unsigned int model)
>   {
> @@ -3559,6 +3573,8 @@ dump_sysfs_cstate_config(void)
>   		*sp = '\0';
>   		fclose(input);
>   
> +		remove_underbar(name_buf);
> +
>   		sprintf(path, "/sys/devices/system/cpu/cpu%d/cpuidle/state%d/desc",
>   			base_cpu, state);
>   		input = fopen(path, "r");
> @@ -5597,6 +5613,8 @@ void probe_sysfs(void)
>   		*sp = '%';
>   		*(sp + 1) = '\0';
>   
> +		remove_underbar(name_buf);
> +
>   		fclose(input);
>   
>   		sprintf(path, "cpuidle/state%d/time", state);
> @@ -5624,6 +5642,8 @@ void probe_sysfs(void)
>   		*sp = '\0';
>   		fclose(input);
>   
> +		remove_underbar(name_buf);
> +
>   		sprintf(path, "cpuidle/state%d/usage", state);
>   
>   		if (is_deferred_skip(name_buf))
>