linux-kernel - Re: [PATCH v1 1/3] perf diff: Support --time filter option

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Date:   Mon, 25 Feb 2019 14:38:54 +0100
From:   Jiri Olsa <jolsa@...hat.com>
To:     Jin Yao <yao.jin@...ux.intel.com>
Cc:     acme@...nel.org, jolsa@...nel.org, peterz@...radead.org,
        mingo@...hat.com, alexander.shishkin@...ux.intel.com,
        Linux-kernel@...r.kernel.org, ak@...ux.intel.com,
        kan.liang@...el.com, yao.jin@...el.com
Subject: Re: [PATCH v1 1/3] perf diff: Support --time filter option

On Mon, Feb 25, 2019 at 09:42:42PM +0800, Jin Yao wrote:

SNIP

>  COMPARISON
>  ----------
>  The comparison is governed by the baseline file. The baseline perf.data
> diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c
> index 751e197..ddc41e7 100644
> --- a/tools/perf/builtin-diff.c
> +++ b/tools/perf/builtin-diff.c
> @@ -19,12 +19,21 @@
>  #include "util/util.h"
>  #include "util/data.h"
>  #include "util/config.h"
> +#include "util/time-utils.h"
>  
>  #include <errno.h>
>  #include <inttypes.h>
>  #include <stdlib.h>
>  #include <math.h>
>  
> +struct perf_diff {
> +	struct perf_tool	tool;
> +	const char		*time_str;
> +	struct perf_time_interval *ptime_range;
> +	int			range_size;
> +	int			range_num;

please align the members

>  static int __cmd_diff(void)
>  {
>  	struct data__file *d;
>  	int ret = -EINVAL, i;
> +	char *abstime_ostr = NULL, *abstime_tmp = NULL;
> +	bool abstime = false;
> +
> +	if (pdiff.time_str && strchr(pdiff.time_str, ':')) {
> +		abstime = true;
> +		pdiff.ptime_range = perf_time__range_alloc(NULL,
> +							   &pdiff.range_size);
> +	} else {
> +		pdiff.ptime_range = perf_time__range_alloc(pdiff.time_str,
> +							   &pdiff.range_size);
> +	}
> +
> +	if (!pdiff.ptime_range)
> +		return -ENOMEM;
> +
> +	if (abstime) {
> +		abstime_ostr = strdup(pdiff.time_str);
> +		if (!abstime_ostr) {
> +			zfree(&pdiff.ptime_range);
> +			return -ENOMEM;
> +		}
> +		abstime_tmp = abstime_ostr;
> +	}

could you please put this in separate function?


>  
>  	data__for_each_file(i, d) {
> -		d->session = perf_session__new(&d->data, false, &tool);
> +		d->session = perf_session__new(&d->data, false, &pdiff.tool);
>  		if (!d->session) {
>  			pr_err("Failed to open %s\n", d->data.file.path);
>  			ret = -1;
>  			goto out_delete;
>  		}
>  
> +		if (abstime) {
> +			ret = parse_absolute_time(d, &abstime_tmp);
> +			if (ret < 0)
> +				goto out_delete;
> +		} else if (pdiff.time_str) {
> +			ret = parse_percent_time(d);
> +			if (ret < 0)
> +				goto out_delete;
> +		} else {
> +			pdiff.range_num = 1;
> +		}
> +

and this as well

thanks,
jirka