linux-kernel - Re: [RFC] perf/jevents: Add new structure to pass json fields.

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Message-ID: <5d91b929-cffd-265a-dd0c-f63bc3d1565d@linux.ibm.com>
Date:   Wed, 26 Aug 2020 16:54:46 +0530
From:   kajoljain <kjain@...ux.ibm.com>
To:     Jiri Olsa <jolsa@...hat.com>, John Garry <john.garry@...wei.com>
Cc:     acme@...nel.org, ak@...ux.intel.com, yao.jin@...ux.intel.com,
        linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
        irogers@...gle.com, maddy@...ux.ibm.com,
        ravi.bangoria@...ux.ibm.com
Subject: Re: [RFC] perf/jevents: Add new structure to pass json fields.



On 8/26/20 4:30 PM, Jiri Olsa wrote:
> On Tue, Aug 25, 2020 at 09:14:11AM +0100, John Garry wrote:
> 
> SNIP
> 
>>>   				goto free_strings;
>>>   		}
>>> -		err = func(data, name, real_event(name, event), desc, long_desc,
>>> -			   pmu, unit, perpkg, metric_expr, metric_name,
>>> -			   metric_group, deprecated, metric_constraint);
>>> +		je->event = real_event(je->name, je->event);
>>> +		err = func(data, je);
>>>   free_strings:
>>> -		free(event);
>>> -		free(desc);
>>> -		free(name);
>>> -		free(long_desc);
>>>   		free(extra_desc);
>>> -		free(pmu);
>>>   		free(filter);
>>> -		free(perpkg);
>>> -		free(deprecated);
>>> -		free(unit);
>>> -		free(metric_expr);
>>> -		free(metric_name);
>>> -		free(metric_group);
>>> -		free(metric_constraint);
>>>   		free(arch_std);
>>> +		free(je);
>>>   		if (err)
>>>   			break;
>>> diff --git a/tools/perf/pmu-events/jevents.h b/tools/perf/pmu-events/jevents.h
>>> index 2afc8304529e..e696edf70e9a 100644
>>> --- a/tools/perf/pmu-events/jevents.h
>>> +++ b/tools/perf/pmu-events/jevents.h
>>
>> Somewhat unrelated - this file only seems to be included in jevents.c, so I
>> don't see why it exists...
> 
> ah right.. I won't mind getting rid of it

Hi John and  Jiri
     Thanks for reviewing the patch. I can remove this file and add these structure inside jevents.c

Thanks,
Kajol Jain
>  
>>> @@ -2,14 +2,28 @@
>>>   #ifndef JEVENTS_H
>>>   #define JEVENTS_H 1
>>> +#include "pmu-events.h"
>>> +
>>> +struct json_event {
>>> +	char *name;
>>> +	char *event;
>>> +	char *desc;
>>> +	char *topic;
>>> +	char *long_desc;
>>> +	char *pmu;
>>> +	char *unit;
>>> +	char *perpkg;
>>> +	char *metric_expr;
>>> +	char *metric_name;
>>> +	char *metric_group;
>>> +	char *deprecated;
>>> +	char *metric_constraint;
>>
>> This looks very much like struct event_struct, so could look to consolidate:
>>
>> struct event_struct {
>> 	struct list_head list;
>> 	char *name;
>> 	char *event;
>> 	char *desc;
>> 	char *long_desc;
>> 	char *pmu;
>> 	char *unit;
>> 	char *perpkg;
>> 	char *metric_expr;
>> 	char *metric_name;
>> 	char *metric_group;
>> 	char *deprecated;
>> 	char *metric_constraint;
>> };
> 
> as Andi said they come from different layers, I think it's
> better to keep them separated even if they share some fields
> 
> thanks,
> jirka
>