LiveSession.run() synchronously blocks while polling evlist for events.
When running interactive tools or scripts from the terminal,
KeyboardInterrupt exceptions raised via Ctrl-C must propagate so the
caller can break out of the polling loop.
Previously, LiveSession caught KeyboardInterrupt with an empty pass
statement, swallowing the exception and preventing calling scripts from
detecting the interrupt cleanly. Remove the empty handler so calling
scripts receive KeyboardInterrupt and can perform clean teardown.
Assisted-by: Antigravity:gemini-3.1-pro
Signed-off-by: Ian Rogers <irogers@google.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Add LiveSession class in tools/perf/python/perf_live.py to support
live event collection using perf.evlist and perf.parse_events,
avoiding the need to fork a separate perf record process.
Signed-off-by: Ian Rogers <irogers@google.com>
Assisted-by: Gemini:gemini-3.1-pro-preview
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alice Rogers <alice.mei.rogers@gmail.com>
Cc: Dapeng Mi <dapeng1.mi@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Leo Yan <leo.yan@linux.dev>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Richter <tmricht@linux.ibm.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
