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Date: Tue, 15 Nov 2016 11:28:54 +0900
From: Taeung Song <treeze.taeung@...il.com>
To: Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>
Cc: linux-kernel@...r.kernel.org, Jiri Olsa <jolsa@...nel.org>,
Namhyung Kim <namhyung@...nel.org>,
Ingo Molnar <mingo@...nel.org>,
Peter Zijlstra <peterz@...radead.org>,
Wang Nan <wangnan0@...wei.com>,
Nambong Ha <over3025@...il.com>, Wookje Kwon <aweee0@...il.com>
Subject: Re: [PATCH 4/6] perf config: Add support for writing configs to a
config file
Hi, Arnaldo :)
On 11/15/2016 10:49 AM, Arnaldo Carvalho de Melo wrote:
> Em Tue, Nov 15, 2016 at 02:00:38AM +0900, Taeung Song escreveu:
>> Thank you for your review.
>>
>> I have a question at the very bottom
>> (skip v2 I sent lately or not ?).
>
> Humm, I combined some patches, fixed up the stuff I noticed, and pushed
> to Ingo, please take a look at that and post patches for anything you
> find applicable,
>
> Thanks,
>
> - Arnaldo
You combined this patches by yourself.
Thank you so much!
I checked the new patchset, I think it is good! :)
However,
/* overwrite configvariables */
We need to add a space as you said..
But it is a very minor part, I thought it can be ignored.
Thanks,
Taeung
>> On 11/15/2016 01:04 AM, Arnaldo Carvalho de Melo wrote:
>>> Em Fri, Nov 04, 2016 at 03:44:20PM +0900, Taeung Song escreveu:
>>>> Add setting feature that can add config variables with their values
>>>> to a config file (i.e. user or system config file) or modify
>>>> config key-value pairs in a config file.
>>>> For the syntax examples,
>>>>
>>>> perf config [<file-option>] [section.name[=value] ...]
>>>>
>>>> e.g. You can set the ui.show-headers to false with
>>>>
>>>> # perf config ui.show-headers=false
>>>>
>>>> If you want to add or modify several config items, you can do like
>>>>
>>>> # perf config annotate.show_nr_jumps=false kmem.default=slab
>>>
>>> This works, but has some problems, see below:
>>>
>>>> Cc: Namhyung Kim <namhyung@...nel.org>
>>>> Cc: Jiri Olsa <jolsa@...nel.org>
>>>> Cc: Wang Nan <wangnan0@...wei.com>
>>>> Signed-off-by: Taeung Song <treeze.taeung@...il.com>
>>>> ---
>>>> tools/perf/builtin-config.c | 66 ++++++++++++++++++++++++++++++++++++++++-----
>>>> tools/perf/util/config.c | 6 +++++
>>>> tools/perf/util/config.h | 2 ++
>>>> 3 files changed, 68 insertions(+), 6 deletions(-)
>>>>
>>>> diff --git a/tools/perf/builtin-config.c b/tools/perf/builtin-config.c
>>>> index fe253f3..5313702 100644
>>>> --- a/tools/perf/builtin-config.c
>>>> +++ b/tools/perf/builtin-config.c
>>>> @@ -17,7 +17,7 @@
>>>> static bool use_system_config, use_user_config;
>>>>
>>>> static const char * const config_usage[] = {
>>>> - "perf config [<file-option>] [options] [section.name ...]",
>>>> + "perf config [<file-option>] [options] [section.name[=value] ...]",
>>>> NULL
>>>> };
>>>>
>>>> @@ -33,6 +33,37 @@ static struct option config_options[] = {
>>>> OPT_END()
>>>> };
>>>>
>>>> +static int set_config(struct perf_config_set *set, const char *file_name,
>>>> + const char *var, const char *value)
>>>> +{
>>>> + struct perf_config_section *section = NULL;
>>>> + struct perf_config_item *item = NULL;
>>>> + const char *first_line = "# this file is auto-generated.";
>>>> + FILE *fp = fopen(file_name, "w");
>>>> +
>>>> + if (!fp)
>>>> + return -1;
>>>> + if (set == NULL)
>>>> + return -1;
>>>
>>> So, here fp is left open? I'm fixing this...
>>
>> Understood. Sorry, I missed out it.
>>
>>>> + perf_config_set__collect(set, var, value);
>>>> + fprintf(fp, "%s\n", first_line);
>>>> +
>>>> + /* overwrite configvariables */
>>> missing space?
>>
>> Oops.. I missed a white space between two words.
>>
>>>> + perf_config_items__for_each_entry(&set->sections, section) {
>>>> + fprintf(fp, "[%s]\n", section->name);
>>>> +
>>>> + perf_config_items__for_each_entry(§ion->items, item) {
>>>> + if (item->value)
>>>> + fprintf(fp, "\t%s = %s\n",
>>>> + item->name, item->value);
>>>> + }
>>>> + }
>>>> + fclose(fp);
>>>> +
>>>> + return 0;
>>>> +}
>>>> +
>>>> static int show_spec_config(struct perf_config_set *set, const char *var)
>>>> {
>>>> struct perf_config_section *section;
>>>> @@ -82,7 +113,7 @@ static int show_config(struct perf_config_set *set)
>>>> return 0;
>>>> }
>>>>
>>>> -static int parse_config_arg(char *arg, char **var)
>>>> +static int parse_config_arg(char *arg, char **var, char **value)
>>>> {
>>>> const char *last_dot = strchr(arg, '.');
>>>>
>>>> @@ -99,7 +130,21 @@ static int parse_config_arg(char *arg, char **var)
>>>> return -1;
>>>> }
>>>>
>>>> - *var = arg;
>>>> + *value = strchr(arg, '=');
>>>> + if (*value == NULL)
>>>> + *var = arg;
>>>> + else if (!strcmp(*value, "=")) {
>>>> + pr_err("The config variable does not contain a value: %s\n", arg);
>>>> + return -1;
>>>> + } else {
>>>> + *value = *value + 1; /* excluding a first character '=' */
>>>> + *var = strsep(&arg, "=");
>>>> + if (*var[0] == '\0') {
>>>> + pr_err("invalid config variable: %s\n", arg);
>>>> + return -1;
>>>> + }
>>>> + }
>>>> +
>>
>> Here and..
>>
>>>>
>>>> @@ -153,7 +198,8 @@ int cmd_config(int argc, const char **argv, const char *prefix __maybe_unused)
>>>> default:
>>>> if (argc) {
>>>> for (i = 0; argv[i]; i++) {
>>>> - char *var, *arg = strdup(argv[i]);
>>>> + char *var, *value;
>>>> + char *arg = strdup(argv[i]);
>>>>
>>>> if (!arg) {
>>>> pr_err("%s: strdup failed\n", __func__);
>>>> @@ -161,13 +207,21 @@ int cmd_config(int argc, const char **argv, const char *prefix __maybe_unused)
>>>> break;
>>>> }
>>>>
>>>> - if (parse_config_arg(arg, &var) < 0) {
>>>> + if (parse_config_arg(arg, &var, &value) < 0) {
>>>> free(arg);
>>>> ret = -1;
>>>> break;
>>>> }
>>>>
>>>> - ret = show_spec_config(set, var);
>>>> + if (value == NULL)
>>>> + ret = show_spec_config(set, var);
>>>> + else {
>>>> + const char *config_filename = config_exclusive_filename;
>>>> +
>>>> + if (!config_exclusive_filename)
>>>> + config_filename = user_config;
>>>> + ret = set_config(set, config_filename, var, value);
>>>> + }
>>>> free(arg);
>>
>> Here, the parts are a bit different than v2 patchset I sent lately.
>> I refactored parse_config_arg() and a bit modify parsing
>> config arguments in cmd_config().
>>
>> Is it better to just skip v2 patchset I sent ?
>> And remake new patchset regarding today your feedback ?
>>
>> Or would I make v3 that adopts v2 I sent?
>>
>>
>> Thanks,
>> Taeung
>>
>>>> }
>>>> } else
>>>> diff --git a/tools/perf/util/config.c b/tools/perf/util/config.c
>>>> index 18dae74..c8fb65d 100644
>>>> --- a/tools/perf/util/config.c
>>>> +++ b/tools/perf/util/config.c
>>>> @@ -602,6 +602,12 @@ static int collect_config(const char *var, const char *value,
>>>> return -1;
>>>> }
>>>>
>>>> +int perf_config_set__collect(struct perf_config_set *set,
>>>> + const char *var, const char *value)
>>>> +{
>>>> + return collect_config(var, value, set);
>>>> +}
>>>> +
>>>> static int perf_config_set__init(struct perf_config_set *set)
>>>> {
>>>> int ret = -1;
>>>> diff --git a/tools/perf/util/config.h b/tools/perf/util/config.h
>>>> index 6f813d4..0fcdb8c 100644
>>>> --- a/tools/perf/util/config.h
>>>> +++ b/tools/perf/util/config.h
>>>> @@ -33,6 +33,8 @@ const char *perf_etc_perfconfig(void);
>>>>
>>>> struct perf_config_set *perf_config_set__new(void);
>>>> void perf_config_set__delete(struct perf_config_set *set);
>>>> +int perf_config_set__collect(struct perf_config_set *set,
>>>> + const char *var, const char *value);
>>>> void perf_config__init(void);
>>>> void perf_config__exit(void);
>>>> void perf_config__refresh(void);
>>>> --
>>>> 2.7.4
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