Re: [PATCH v2] cpupower : Handle set and info subcommands correctly

[shuah <shuah@kernel.org>]

Hi Abhishek,

On 10/3/19 8:38 AM, shuah wrote:
> On 9/13/19 2:07 AM, Abhishek Goel wrote:
>> Cpupower tool has set and info options which are being used only by
>> x86 machines. This patch removes support for these two subcommands
>> from generic cpupower utility. Thus, these two subcommands will now be
>> available only for intel.
>> This removes the ambiguous error message while using set option in case
>> of using non-intel systems.
>>
>> Without this patch on a non-intel box:
>>
>> root@ubuntu:~# cpupower info
>> System does not support Intel's performance bias setting
>>
>> root@ubuntu:~# cpupower set -b 10
>> Error setting perf-bias value on CPU
>>
>> With this patch on a non-intel box:
>>
>> root@ubuntu:~# cpupower info
>> Supported commands are:
>>          frequency-info
>>          frequency-set
>>          idle-info
>>          idle-set
>>          monitor
>>          help
>>
>> Same result for set subcommand.
>>
>> This patch does not affect results on a intel box.
>>
>> Signed-off-by: Abhishek Goel <huntbag@linux.vnet.ibm.com>
>> Acked-by: Thomas Renninger <trenn@suse.de>
>> ---
>>
>> changes from v1:
>>     Instead of bailing out early in set and info commands, in V2, we
>>     are cutting out support for these two commands for non-intel
>>     systems.
> 
> thanks. I will get this in for 5.4-rc3 veru likely. Definitely in 5.4
> 

Okay I almost applied this and decided it needs improvements.

I don't like using #if defined(__x86_64__) || defined(__i386__)

tools/power/cpupower/utils/cpupower.c main() already does this
dynamically using uname(). Please use the same logic do this,
instead of adding compile time code.

thanks,
-- Shuah