Add debug system properties to control profiling limits.

When security.perf_harden is disabled through adb, use some debug
system properties to set profiling limits in the kernel, including
cpu percentage, memory, and max sample rate.

Bug: 110706031
Test: boot hikey960 and manually set system properties to make
Test: sure it works.

Change-Id: I44c0adf3a000bb393905233f2a097c97b5fe91ec
This commit is contained in:
Yabin Cui 2018-06-29 14:52:47 -07:00
parent 4251739928
commit 4f0da7cb82
1 changed files with 3 additions and 0 deletions

View File

@ -718,6 +718,9 @@ on property:sys.sysctl.tcp_def_init_rwnd=*
on property:security.perf_harden=0
write /proc/sys/kernel/perf_event_paranoid 1
write /proc/sys/kernel/perf_event_max_sample_rate ${debug.perf_event_max_sample_rate:-100000}
write /proc/sys/kernel/perf_cpu_time_max_percent ${debug.perf_cpu_time_max_percent:-25}
write /proc/sys/kernel/perf_event_mlock_kb ${debug.perf_event_mlock_kb:-516}
on property:security.perf_harden=1
write /proc/sys/kernel/perf_event_paranoid 3