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perf tools: Add config options support for event parsing

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Adding a new rule to the event grammar to be able to specify
values of additional attributes of symbolic event.

The new syntax for event symbolic definition is:

event_legacy_symbol:  PE_NAME_SYM '/' event_config '/' |
                      PE_NAME_SYM sep_slash_dc

event_config:         event_config ',' event_term | event_term

event_term:           PE_NAME '=' PE_NAME |
                      PE_NAME '=' PE_VALUE
                      PE_NAME

sep_slash_dc: '/' | ':' |

At the moment the config options are hardcoded to be used for legacy
symbol events to define several perf_event_attr fields. It is:

  'config'   to define perf_event_attr::config
  'config1'  to define perf_event_attr::config1
  'config2'  to define perf_event_attr::config2
  'period'   to define perf_event_attr::sample_period

Legacy events could be now specified as:
  cycles/period=100000/

If term is specified without the value assignment, then 1 is
assigned by default.

Acked-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/n/tip-mgkavww9790jbt2jdkooyv4q@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa
2012-03-15 20:09:16 +01:00
committed by Arnaldo Carvalho de Melo
parent 89812fc81f
commit 8f707d843c
9 changed files with 845 additions and 426 deletions
Download Patch File Download Diff File Expand all files Collapse all files

99
tools/perf/util/parse-events.c
View File

@@ -588,15 +588,60 @@ int parse_events_add_breakpoint(struct list_head *list, int *idx,
return add_event(list, idx, &attr, name);
}
int
parse_events_add_numeric(struct list_head *list, int *idx,
unsigned long type, unsigned long config)
static int config_term(struct perf_event_attr *attr,
struct parse_events__term *term)
{
switch (term->type) {
case PARSE_EVENTS__TERM_TYPE_CONFIG:
attr->config = term->val.num;
break;
case PARSE_EVENTS__TERM_TYPE_CONFIG1:
attr->config1 = term->val.num;
break;
case PARSE_EVENTS__TERM_TYPE_CONFIG2:
attr->config2 = term->val.num;
break;
case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
attr->sample_period = term->val.num;
break;
case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
/*
* TODO uncomment when the field is available
* attr->branch_sample_type = term->val.num;
*/
break;
default:
return -EINVAL;
}
return 0;
}
static int config_attr(struct perf_event_attr *attr,
struct list_head *head, int fail)
{
struct parse_events__term *term;
list_for_each_entry(term, head, list)
if (config_term(attr, term) && fail)
return -EINVAL;
return 0;
}
int parse_events_add_numeric(struct list_head *list, int *idx,
unsigned long type, unsigned long config,
struct list_head *head_config)
{
struct perf_event_attr attr;
memset(&attr, 0, sizeof(attr));
attr.type = type;
attr.config = config;
if (head_config &&
config_attr(&attr, head_config, 1))
return -EINVAL;
return add_event(list, idx, &attr,
(char *) __event_name(type, config));
}
@@ -923,3 +968,51 @@ void print_events(const char *event_glob)
print_tracepoint_events(NULL, NULL);
}
int parse_events__is_hardcoded_term(struct parse_events__term *term)
{
return term->type <= PARSE_EVENTS__TERM_TYPE_HARDCODED_MAX;
}
int parse_events__new_term(struct parse_events__term **_term, int type,
char *config, char *str, long num)
{
struct parse_events__term *term;
term = zalloc(sizeof(*term));
if (!term)
return -ENOMEM;
INIT_LIST_HEAD(&term->list);
term->type = type;
term->config = config;
switch (type) {
case PARSE_EVENTS__TERM_TYPE_CONFIG:
case PARSE_EVENTS__TERM_TYPE_CONFIG1:
case PARSE_EVENTS__TERM_TYPE_CONFIG2:
case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:
case PARSE_EVENTS__TERM_TYPE_NUM:
term->val.num = num;
break;
case PARSE_EVENTS__TERM_TYPE_STR:
term->val.str = str;
break;
default:
return -EINVAL;
}
*_term = term;
return 0;
}
void parse_events__free_terms(struct list_head *terms)
{
struct parse_events__term *term, *h;
list_for_each_entry_safe(term, h, terms, list)
free(term);
free(terms);
}