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
diff --git a/rootdir/init.rc b/rootdir/init.rc
index 625ffba..c1ae932 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -718,6 +718,9 @@
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
