No se pudo usar systrace en Jelly Bean

He intentado usar el nuevo systrace de la liberación del frijol de la jalea, pero sin la suerte.

He habilitado gráficos y vistas de rastros en las configuraciones de desarrollo como en la sesión de E / S, y trató de llamar systrace, y todo lo que obtengo es esto.

$ ./systrace.py error opening /sys/kernel/debug/tracing/options/overwrite: No such file or directory (2) error opening /sys/kernel/debug/tracing/events/sched/sched_switch/enable: No such file or directory (2) error opening /sys/kernel/debug/tracing/events/sched/sched_wakeup/enable: No such file or directory (2) error opening /sys/kernel/debug/tracing/events/power/cpu_frequency/enable: No such file or directory (2) error opening /sys/kernel/debug/tracing/events/power/cpu_idle/enable: No such file or directory (2) error opening /sys/kernel/debug/tracing/buffer_size_kb: No such file or directory (2) error opening /sys/kernel/debug/tracing/trace_clock: No such file or directory (2) error opening /sys/kernel/debug/tracing/events/workqueue/enable: No such file or directory (2) error opening /sys/kernel/debug/tracing/events/ext4/ext4_sync_file_enter/enable: No such file or directory (2) error opening /sys/kernel/debug/tracing/events/ext4/ext4_sync_file_exit/enable: No such file or directory (2) error opening /sys/kernel/debug/tracing/events/block/block_rq_issue/enable: No such file or directory (2) error opening /sys/kernel/debug/tracing/events/block/block_rq_complete/enable: No such file or directory (2) error opening /sys/kernel/debug/tracing/tracing_on: No such file or directory (2) error: unable to start trace error opening /sys/kernel/debug/tracing/tracing_on: No such file or directory (2) error opening /sys/kernel/debug/tracing/options/overwrite: No such file or directory (2) error opening /sys/kernel/debug/tracing/events/sched/sched_switch/enable: No such file or directory (2) error opening /sys/kernel/debug/tracing/events/sched/sched_wakeup/enable: No such file or directory (2) error opening /sys/kernel/debug/tracing/events/power/cpu_frequency/enable: No such file or directory (2) error opening /sys/kernel/debug/tracing/trace_clock: No such file or directory (2) error opening /sys/kernel/debug/tracing/events/workqueue/enable: No such file or directory (2) error opening /sys/kernel/debug/tracing/events/ext4/ext4_sync_file_enter/enable: No such file or directory (2) error opening /sys/kernel/debug/tracing/events/ext4/ext4_sync_file_exit/enable: No such file or directory (2) error opening /sys/kernel/debug/tracing/events/block/block_rq_issue/enable: No such file or directory (2) error opening /sys/kernel/debug/tracing/events/block/block_rq_complete/enable: No such file or directory (2) unable to start tracing error opening /sys/kernel/debug/tracing/buffer_size_kb: No such file or directory (2) An error occured while capturing the trace. Output file was not written.

He intentado el emulador y el firmware de encargo en mi desee Hd (as). ¿Alguna idea?

Pruebe los siguientes comandos:

Raíz adb (no está seguro de si es necesario), adb shell mount -t debugfs nodev / sys / kernel / debug

Bajo estos comandos, el script debería ejecutarse correctamente, aunque para mí el archivo html sólo contiene filas para cada CPU, y no los componentes individuales, como el flinger de superficie, que era visible en el video de conversaciones de google IO.