commit 4dfca7c9d7decf492b244cd031d98c30c6a592eb
author Joel Fernandes <joelaf@google.com> Thu Jun 15 16:53:52 2017 -0700
committer Joel Fernandes <joelaf@google.com> Thu Jun 15 16:59:11 2017 -0700
tree f8d26477882f366772a915a55315657428b082a2
parent db886a0983f22d6f8ca9da62cbd4fff3dc6d36c1

atrace: Enable cgroup tracing

In prep for work involving analyzing cgroup CPU time distribution,
enable this trace category in systrace.

Bug: 37997910
Test: Enabled cgroup category by systrace as root/non-root

Change-Id: Ie16cc347c3399eedcd7604fc3e9af607a45f34dc
Signed-off-by: Joel Fernandes <joelaf@google.com>

cmds/atrace/atrace.cpp

diff --git a/cmds/atrace/atrace.cpp b/cmds/atrace/atrace.cpp
index d61cbc9..17ed28b 100644
--- a/cmds/atrace/atrace.cpp
+++ b/cmds/atrace/atrace.cpp
@@ -120,6 +120,7 @@
         { OPT,      "events/sched/sched_waking/enable" },
         { OPT,      "events/sched/sched_blocked_reason/enable" },
         { OPT,      "events/sched/sched_cpu_hotplug/enable" },
+        { OPT,      "events/cgroup/enable" },
     } },
     { "irq",        "IRQ Events",   0, {
         { REQ,      "events/irq/enable" },

cmds/atrace/atrace.rc

diff --git a/cmds/atrace/atrace.rc b/cmds/atrace/atrace.rc
index 526fd19..3ea1d56 100644
--- a/cmds/atrace/atrace.rc
+++ b/cmds/atrace/atrace.rc
@@ -25,6 +25,8 @@
     chown root shell /sys/kernel/tracing/events/sched/sched_blocked_reason/enable
     chown root shell /sys/kernel/debug/tracing/events/sched/sched_cpu_hotplug/enable
     chown root shell /sys/kernel/tracing/events/sched/sched_cpu_hotplug/enable
+    chown root shell /sys/kernel/debug/tracing/events/cgroup/enable
+    chown root shell /sys/kernel/tracing/events/cgroup/enable
     chown root shell /sys/kernel/debug/tracing/events/power/cpu_frequency/enable
     chown root shell /sys/kernel/tracing/events/power/cpu_frequency/enable
     chown root shell /sys/kernel/debug/tracing/events/power/cpu_idle/enable
@@ -77,6 +79,8 @@
     chmod 0664 /sys/kernel/tracing/events/sched/sched_blocked_reason/enable
     chmod 0664 /sys/kernel/debug/tracing/events/sched/sched_cpu_hotplug/enable
     chmod 0664 /sys/kernel/tracing/events/sched/sched_cpu_hotplug/enable
+    chmod 0664 /sys/kernel/debug/tracing/events/cgroup/enable
+    chmod 0664 /sys/kernel/tracing/events/cgroup/enable
     chmod 0664 /sys/kernel/debug/tracing/events/power/cpu_frequency/enable
     chmod 0664 /sys/kernel/tracing/events/power/cpu_frequency/enable
     chmod 0664 /sys/kernel/debug/tracing/events/power/cpu_idle/enable