This patch adds the x modifier for events. It allows users to request exclusive PMU access (attr->exclusive):
perf stat -e cycles:x ...... or perf stat -e cpu/cycles/x .... Exclusive mode is a feature of perf_events which was not yet supported by the perf tool. Some events may require exclusive PMU access (like on Intel SandyBridge). Signed-off-by: Stephane Eranian <[email protected]> --- tools/perf/util/parse-events.c | 7 +++++++ tools/perf/util/parse-events.l | 2 +- 2 files changed, 8 insertions(+), 1 deletion(-) diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c index aed38e4..aa73392 100644 --- a/tools/perf/util/parse-events.c +++ b/tools/perf/util/parse-events.c @@ -642,6 +642,7 @@ struct event_modifier { int eG; int precise; int exclude_GH; + int exclusive; }; static int get_event_modifier(struct event_modifier *mod, char *str, @@ -656,6 +657,7 @@ static int get_event_modifier(struct event_modifier *mod, char *str, int exclude = eu | ek | eh; int exclude_GH = evsel ? evsel->exclude_GH : 0; + int exclusive = evsel ? evsel->attr.exclusive : 0; /* * We are here for group and 'GH' was not set as event @@ -690,6 +692,8 @@ static int get_event_modifier(struct event_modifier *mod, char *str, eH = 0; } else if (*str == 'p') { precise++; + } else if (*str == 'x') { + exclusive = 1; } else break; @@ -716,6 +720,8 @@ static int get_event_modifier(struct event_modifier *mod, char *str, mod->eG = eG; mod->precise = precise; mod->exclude_GH = exclude_GH; + mod->exclusive = exclusive; + return 0; } @@ -741,6 +747,7 @@ int parse_events__modifier_event(struct list_head *list, char *str, bool add) evsel->attr.precise_ip = mod.precise; evsel->attr.exclude_host = mod.eH; evsel->attr.exclude_guest = mod.eG; + evsel->attr.exclusive = mod.exclusive; evsel->exclude_GH = mod.exclude_GH; } diff --git a/tools/perf/util/parse-events.l b/tools/perf/util/parse-events.l index c87efc1..9c8a06d 100644 --- a/tools/perf/util/parse-events.l +++ b/tools/perf/util/parse-events.l @@ -81,7 +81,7 @@ num_dec [0-9]+ num_hex 0x[a-fA-F0-9]+ num_raw_hex [a-fA-F0-9]+ name [a-zA-Z_*?][a-zA-Z0-9_*?]* -modifier_event [ukhpGH]{1,8} +modifier_event [ukhpGHx]{1,8} modifier_bp [rwx]{1,3} %% -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
