• Jiri Olsa's avatar
    perf tools: Add config options support for event parsing · 8f707d84
    Jiri Olsa authored
    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: default avatarPeter Zijlstra <peterz@infradead.org>
    Signed-off-by: default avatarJiri Olsa <jolsa@redhat.com>
    Link: http://lkml.kernel.org/n/tip-mgkavww9790jbt2jdkooyv4q@git.kernel.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
    8f707d84
parse-events.h 2.65 KB