linux-kernel - Re: [PATCH v5 07/10] perf record: implement -z,--compression

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Message-ID: <f57620e8-e6d5-70e5-4da5-e86b687311b0@linux.intel.com>
Date:   Thu, 7 Mar 2019 11:26:26 +0300
From:   Alexey Budankov <alexey.budankov@...ux.intel.com>
To:     Jiri Olsa <jolsa@...hat.com>
Cc:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Andi Kleen <ak@...ux.intel.com>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v5 07/10] perf record: implement -z,--compression_level=n
 option and compression


On 05.03.2019 15:26, Jiri Olsa wrote:
> On Fri, Mar 01, 2019 at 06:58:32PM +0300, Alexey Budankov wrote:
> 
> SNIP
> 
>>  
>> +static size_t record__process_comp_header(void *record, size_t increment)
>> +{
>> +	struct compressed_event *event = record;
>> +	size_t size = sizeof(struct compressed_event);
>> +
>> +	if (increment) {
>> +		event->header.size += increment;
>> +		return increment;
>> +	} else {
>> +		event->header.type = PERF_RECORD_COMPRESSED;
>> +		event->header.size = size;
>> +		return size;
>> +	}
>> +}
>> +
>> +static size_t record__zstd_compress(void *data, void *dst, size_t dst_size,
> 
> we use the <name>__ to mark 'struct' related function,
> which supposed to be the first argument.. IMO zstd_compress
> will be fine in here

in v7.

~Alexey

> 
> jirka
>