linux-kernel - Re: [PATCH 5/9] perf utils: add support for arch standard events

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Message-ID: <312796a3-9818-7793-9e28-7a686c990977@huawei.com>
Date:   Thu, 8 Feb 2018 15:25:30 +0000
From:   John Garry <john.garry@...wei.com>
To:     Jiri Olsa <jolsa@...hat.com>
CC:     <peterz@...radead.org>, <mingo@...hat.com>, <acme@...nel.org>,
        <alexander.shishkin@...ux.intel.com>, <namhyung@...nel.org>,
        <ak@...ux.intel.com>, <wcohen@...hat.com>, <will.deacon@....com>,
        <ganapatrao.kulkarni@...ium.com>, <linux-kernel@...r.kernel.org>,
        <linuxarm@...wei.com>, <zhangshaokun@...ilicon.com>,
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 5/9] perf utils: add support for arch standard events

On 08/02/2018 13:55, Jiri Olsa wrote:
> On Wed, Feb 07, 2018 at 01:45:00AM +0800, John Garry wrote:
>
> SNIP
>
>>
>> +static int is_json_file(const char *name)
>> +{
>> +	const char *suffix;
>> +
>> +	if (strlen(name) < 5)
>> +		return 0;
>> +
>> +	suffix = name + strlen(name) - 5;
>> +
>> +	if (strncmp(suffix, ".json", 5) == 0)
>> +		return 1;
>> +	return 0;
>> +}
>> +
>> +static int preprocess_arch_std_files(const char *fpath, const struct stat *sb,
>> +				int typeflag, struct FTW *ftwbuf)
>> +{
>> +	int level = ftwbuf->level;
>> +	int is_file = typeflag == FTW_F;
>> +
>> +	if (level == 1 && is_file && is_json_file(fpath))
>> +		return json_events(fpath, save_arch_std_events, (void *)sb);
>
> so any .json file will pass..

Yes, so according to the scheme any architecture JSONs should be placed 
in the arch root folder.

just wondering you'd want to put
> some name restriction for recomended events file like this -recomended
> suffix you used later.. but that can be added later in case we'll
> need some other json files in here ;-)

Sorry, but I don't see what the naming restriction would mean in practice.

Thanks,
John

>
> jirka
>
> .
>