linux-kernel - Re: [PATCH v2 2/4] perf record: implement -z=<level> and --mmap-flush=<thres> options

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Date:   Tue, 12 Feb 2019 14:09:41 +0100
From:   Jiri Olsa <jolsa@...hat.com>
To:     Alexey Budankov <alexey.budankov@...ux.intel.com>
Cc:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Andi Kleen <ak@...ux.intel.com>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 2/4] perf record: implement -z=<level> and
 --mmap-flush=<thres> options

On Mon, Feb 11, 2019 at 11:22:38PM +0300, Alexey Budankov wrote:

SNIP

> +static int process_compressed(struct feat_fd *ff,
> +			      void *data __maybe_unused)
> +{
> +	u64 compression_info;
> +
> +	if (do_read_u64(ff, &compression_info))
> +		return -1;
> +
> +	ff->ph->env.comp_type  = (compression_info >> 32) & 0xffffffffULL;
> +	ff->ph->env.comp_level = compression_info & 0xffffffffULL;
> +
> +	if (do_read_u64(ff, &compression_info))
> +		return -1;
> +
> +	ff->ph->env.comp_ratio = (compression_info >> 32) & 0xffffffffULL;
> +	ff->ph->env.comp_mmap_len = compression_info & 0xffffffffULL;
> +
> +	return 0;
> +}
> +
>  struct feature_ops {
>  	int (*write)(struct feat_fd *ff, struct perf_evlist *evlist);
>  	void (*print)(struct feat_fd *ff, FILE *fp);
> @@ -2651,7 +2693,8 @@ static const struct feature_ops feat_ops[HEADER_LAST_FEATURE] = {
>  	FEAT_OPN(CACHE,		cache,		true),
>  	FEAT_OPR(SAMPLE_TIME,	sample_time,	false),
>  	FEAT_OPR(MEM_TOPOLOGY,	mem_topology,	true),
> -	FEAT_OPR(CLOCKID,       clockid,        false)
> +	FEAT_OPR(CLOCKID,       clockid,        false),
> +	FEAT_OPR(COMPRESSED,	compressed,	false)

please separate the COMPRESSED feature ddition into single patch

thanks,
jirka