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

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Date:   Mon, 25 Feb 2019 22:12:08 +0800
From:   "Jin, Yao" <yao.jin@...ux.intel.com>
To:     Jiri Olsa <jolsa@...hat.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 2/25/2019 9:38 PM, Jiri Olsa wrote:
> 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
> 

Not aligned? Sorry, could you give me an example?

>>   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?
> 
> 

Sure, I will put this in a 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
> 

OK.

Thanks
Jin Yao

> thanks,
> jirka
>