This happens on hybrid machine metrics. Be tolerant and don't cause
the ilist application to crash with an exception.

Signed-off-by: Ian Rogers <irogers@google.com>
---
 tools/perf/python/ilist.py | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/tools/perf/python/ilist.py b/tools/perf/python/ilist.py
index eb687ce9d5a6..0d757ddb4795 100755
--- a/tools/perf/python/ilist.py
+++ b/tools/perf/python/ilist.py
@@ -77,8 +77,12 @@ class Metric(TreeValue):
         return perf.parse_metrics(self.metric_name, self.metric_pmu)
 
     def value(self, evlist: perf.evlist, evsel: perf.evsel, cpu: int, thread: int) -> float:
-        val = evlist.compute_metric(self.metric_name, cpu, thread)
-        return 0 if math.isnan(val) else val
+        try:
+            val = evlist.compute_metric(self.metric_name, cpu, thread)
+            return 0 if math.isnan(val) else val
+        except:
+            # Be tolerant of failures to compute metrics on particular CPUs/threads.
+            return 0
 
 
 @dataclass
-- 
2.51.2.1041.gc1ab5b90ca-goog