[RFC PATCH v17 1/8] perf parse-events: Add a retirement latency modifier

weilin.wang
2024-07-12T19:09:43Z

From: Ian Rogers <irogers@google.com>

Retirement latency is a separate sampled count used on newer Intel
CPUs.

Signed-off-by: Ian Rogers <irogers@google.com>
Signed-off-by: Weilin Wang <weilin.wang@intel.com>
---
tools/perf/util/evsel.h | 1 +
tools/perf/util/parse-events.c | 2 ++
tools/perf/util/parse-events.h | 1 +
tools/perf/util/parse-events.l | 3 ++-
4 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h
index 80b5f6dd868e..14f777b9e03e 100644
--- a/tools/perf/util/evsel.h
+++ b/tools/perf/util/evsel.h
@@ -98,6 +98,7 @@ struct evsel {
bool bpf_counter;
bool use_config_name;
bool skippable;
+ bool retire_lat;
int bpf_fd;
struct bpf_object *bpf_obj;
struct list_head config_terms;
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 321586fb5556..fab01ba54e34 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -1811,6 +1811,8 @@ static int parse_events__modifier_list(struct parse_events_state *parse_state,
evsel->weak_group = true;
if (mod.bpf)
evsel->bpf_counter = true;
+ if (mod.retire_lat)
+ evsel->retire_lat = true;
}
return 0;
}
diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h
index e13de2c8b706..b735cd9e0acf 100644
--- a/tools/perf/util/parse-events.h
+++ b/tools/perf/util/parse-events.h
@@ -203,6 +203,7 @@ struct parse_events_modifier {
bool hypervisor : 1; /* 'h' */
bool guest : 1; /* 'G' */
bool host : 1; /* 'H' */
+ bool retire_lat : 1; /* 'R' */
};

int parse_events__modifier_event(struct parse_events_state *parse_state, void *loc,
diff --git a/tools/perf/util/parse-events.l b/tools/perf/util/parse-events.l
index 16045c383ada..5a0bcd7f166a 100644
--- a/tools/perf/util/parse-events.l
+++ b/tools/perf/util/parse-events.l
@@ -209,6 +209,7 @@ static int modifiers(struct parse_events_state *parse_state, yyscan_t scanner)
CASE('W', weak);
CASE('e', exclusive);
CASE('b', bpf);
+ CASE('R', retire_lat);
default:
return PE_ERROR;
}
@@ -250,7 +251,7 @@ drv_cfg_term [a-zA-Z0-9_\.]+(=[a-zA-Z0-9_*?\.:]+)?
* If you add a modifier you need to update check_modifier().
* Also, the letters in modifier_event must not be in modifier_bp.
*/
-modifier_event [ukhpPGHSDIWeb]{1,15}
+modifier_event [ukhpPGHSDIWebR]{1,16}
modifier_bp [rwx]{1,3}
lc_type (L1-dcache|l1-d|l1d|L1-data|L1-icache|l1-i|l1i|L1-instruction|LLC|L2|dTLB|d-tlb|Data-TLB|iTLB|i-tlb|Instruction-TLB|branch|branches|bpu|btb|bpc|node)
lc_op_result (load|loads|read|store|stores|write|prefetch|prefetches|speculative-read|speculative-load|refs|Reference|ops|access|misses|miss)
--
2.43.0