@@ -274,6 +274,11 @@ class JsonEvent:
return fixed[name.lower()]
return event
+ def counter_list_to_bitmask(counterlist):
+ counter_ids = list(map(int, counterlist.split(',')))
+ bitmask = sum(1 << pos for pos in counter_ids)
+ return bitmask
+
def unit_to_pmu(unit: str) -> Optional[str]:
"""Convert a JSON Unit to Linux PMU name."""
if not unit or unit == "core":
@@ -427,6 +432,10 @@ class JsonEvent:
else:
raise argparse.ArgumentTypeError('Cannot find arch std event:', arch_std)
+ if self.counters['list']:
+ bitmask = counter_list_to_bitmask(self.counters['list'])
+ event += f',counterid_mask={bitmask:#x}'
+
self.event = real_event(self.name, event)
def __repr__(self) -> str:
RISC-V doesn't have any standard event to counter mapping discovery mechanism in the ISA. The ISA defines 29 programmable counters and platforms can choose to implement any number of them and map any events to any counters. Thus, the perf tool need to inform the driver about the counter mapping of each events. The current perf infrastructure only parses the 'Counter' constraints in metrics. This patch extends that to pass in the pmu events so that any driver can retrieve those values via perf attributes if defined accordingly. Signed-off-by: Atish Patra <atishp@rivosinc.com> --- tools/perf/pmu-events/jevents.py | 9 +++++++++ 1 file changed, 9 insertions(+)