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Date: Sat, 8 Aug 2015 18:50:59 +0900
From: Taewoong Song <treeze.taeung@...il.com>
To: Namhyung Kim <namhyung@...nel.org>
Cc: Arnaldo Carvalho de Melo <acme@...nel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
jolsa@...hat.com, Ingo Molnar <mingo@...hat.com>
Subject: Re: [PATCH v4 4/5] perf config: Add a option 'list-all' to perf-config
Hi, Namhyung
> On Aug 7, 2015, at 10:12 AM, taeung <treeze.taeung@...il.com> wrote:
>
> Hi, Namhyung
>
> On 07/27/2015 05:48 PM, Namhyung Kim wrote:
>> On Mon, Jul 27, 2015 at 12:58:30AM +0900, Taeung Song wrote:
>>> A option 'list-all' is to display both current config variables and
>>> all possible config variables with default values.
>>> The syntax examples are like below
>>>
>>> perf config [options]
>>>
>>> display all perf config with default values.
>>> # perf config -a | --list-all
>>>
>>> Signed-off-by: Taeung Song <treeze.taeung@...il.com>
>>> ---
>>> tools/perf/Documentation/perf-config.txt | 6 ++++
>>> tools/perf/builtin-config.c | 48 ++++++++++++++++++++++++++++++++
>>> 2 files changed, 54 insertions(+)
>>>
>>> diff --git a/tools/perf/Documentation/perf-config.txt b/tools/perf/Documentation/perf-config.txt
>>> index cd4b1a6..d8b3acc 100644
>>> --- a/tools/perf/Documentation/perf-config.txt
>>> +++ b/tools/perf/Documentation/perf-config.txt
>>> @@ -11,6 +11,8 @@ SYNOPSIS
>>> 'perf config' [<file-option>] [section.name[=value] ...]
>>> or
>>> 'perf config' [<file-option>] -l | --list
>>> +or
>>> +'perf config' [<file-option>] -a | --list-all
>>> DESCRIPTION
>>> -----------
>>> @@ -31,6 +33,10 @@ OPTIONS
>>> For writing and reading options: write to system-wide
>>> '$(sysconfdir)/perfconfig' or read it.
>>> +-a::
>>> +--list-all::
>>> + Show current and all possible config variables with default values.
>>> +
>>> CONFIGURATION FILE
>>> ------------------
>>> diff --git a/tools/perf/builtin-config.c b/tools/perf/builtin-config.c
>>> index 6d9f28c..f4a1569 100644
>>> --- a/tools/perf/builtin-config.c
>>> +++ b/tools/perf/builtin-config.c
>>> @@ -23,6 +23,7 @@ static const char * const config_usage[] = {
>>> };
>>> #define ACTION_LIST (1<<0)
>>> +#define ACTION_LIST_ALL (1<<1)
>>> static const struct option config_options[] = {
>>> OPT_GROUP("Config file location"),
>>> @@ -31,6 +32,8 @@ static const struct option config_options[] = {
>>> OPT_GROUP("Action"),
>>> OPT_BIT('l', "list", &actions,
>>> "show current config variables", ACTION_LIST),
>>> + OPT_BIT('a', "list-all", &actions,
>>> + "show current and all possible config variables with default values", ACTION_LIST_ALL),
>> Why did you use OPT_BIT? Do you want to support multiple 'actions' at
>> the same time? I'd rather support just one action, but I won't insist
>> it strongly.. Anyway, setting bits will confuse the switch statement
>> in the cmd_config().
>>
>> Thanks,
>> Namhyung
>>
> I don't understand why setting bits will confuse the switch statement.
> Is the reason about readability of source code ?
>
> But I searched for other parse-option which can be replaced.
> Is it better to use OPT_SET_INT instead of OPT_BIT ?
>
I modified source code to use OPT_SET_UINT
but the problem is happened. I declared "enum actions” to use OPT_SET_UINT like this.
enum actions {
ACTION_LIST,
ACTION_LIST_ALL,
ACTION_REMOVE
} actions;
But default value of actions” variable is 0 and ACTION_LIST is also 0
so when ‘get’ or ’set’ feature is used, ‘default:' of the switch statement in cmd_config() can’t reached
because of default value of ‘actions’ variable is 0.
Use other parse-option function instead of OPT_SET_UINT ?
Thanks,
Taeung
> Thanks,
> Taeung
>
>>> OPT_END()
>>> };
>>> @@ -539,6 +542,45 @@ static int collect_current_config(const char *var, const char *value,
>>> normalize_value(section_name, name, value));
>>> }
>>> +static int show_all_config(void)
>>> +{
>>> + int i;
>>> + bool has_config;
>>> + struct config_section *section_node;
>>> + struct config_element *element_node;
>>> +
>>> + for (i = 0; default_configsets[i].section_name != NULL; i++) {
>>> + find_config(§ion_node, &element_node,
>>> + default_configsets[i].section_name, default_configsets[i].name);
>>> +
>>> + if (!element_node)
>>> + printf("%s.%s=%s\n", default_configsets[i].section_name,
>>> + default_configsets[i].name, default_configsets[i].value);
>>> + else
>>> + printf("%s.%s=%s\n", section_node->name,
>>> + element_node->name, element_node->value);
>>> + }
>>> +
>>> + /* Print config variables the default configsets haven't */
>>> + list_for_each_entry(section_node, §ions, list) {
>>> + list_for_each_entry(element_node, §ion_node->element_head, list) {
>>> + has_config = false;
>>> + for (i = 0; default_configsets[i].section_name != NULL; i++) {
>>> + if (!strcmp(default_configsets[i].section_name, section_node->name)
>>> + && !strcmp(default_configsets[i].name, element_node->name)) {
>>> + has_config = true;
>>> + break;
>>> + }
>>> + }
>>> + if (!has_config)
>>> + printf("%s.%s=%s\n", section_node->name,
>>> + element_node->name, element_node->value);
>>> + }
>>> + }
>>> +
>>> + return 0;
>>> +}
>>> +
>>> static int perf_configset_with_option(configset_fn_t fn, const char *var, char *value)
>>> {
>>> char *section_name;
>>> @@ -617,6 +659,12 @@ int cmd_config(int argc, const char **argv, const char *prefix __maybe_unused)
>>> else
>>> goto out_err;
>>> goto out;
>>> + case ACTION_LIST_ALL:
>>> + if (argc == 0)
>>> + ret = show_all_config();
>>> + else
>>> + goto out_err;
>>> + goto out;
>>> default:
>>> if ((!has_option || use_global_config || use_system_config)
>>> && argc == 0) {
>>> --
>>> 1.9.1
>>>
>
> --
> Thanks,
> Taeung
>
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