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Commit 27db62fa authored by Jerry Chang's avatar Jerry Chang
Browse files

Apply input event profile to mitigate input latency of input threads 

Bug: 347122505
Flag: com.android.input.flags.enable_input_policy_profile
Test: check the priority and latency of input thread in Perffeto
Change-Id: I428b9e718eace0bc39f1965d98475eebe9d3aaa5
parent ca1fefc3

libs/input/input_flags.aconfig

+9 −0
Original line number Diff line number Diff line
@@ -192,3 +192,12 @@ flag { 
  description: "Prevents touchpad gesture changing window focus."

  bug: "364460018"

}



flag {

  name: "enable_input_policy_profile"

  namespace: "input"

  description: "Apply input policy profile for input threads."

  bug: "347122505"

  is_fixed_read_only: true

}

services/inputflinger/Android.bp

+1 −0
Original line number Diff line number Diff line
@@ -217,6 +217,7 @@ cc_defaults { 
        "libcutils",

        "libinput",

        "liblog",

        "libprocessgroup",

        "libstatslog",

        "libutils",

    ],

services/inputflinger/InputThread.cpp

+21 −0
Original line number Diff line number Diff line
@@ -16,8 +16,14 @@ 


#include "InputThread.h"



#include <android-base/logging.h>

#include <com_android_input_flags.h>

#include <processgroup/processgroup.h>



namespace android {



namespace input_flags = com::android::input::flags;



namespace {



// Implementation of Thread from libutils.
@@ -43,6 +49,11 @@ InputThread::InputThread(std::string name, std::function<void()> loop, std::func 
      : mName(name), mThreadWake(wake) {

    mThread = sp<InputThreadImpl>::make(loop);

    mThread->run(mName.c_str(), ANDROID_PRIORITY_URGENT_DISPLAY);

    if (input_flags::enable_input_policy_profile()) {

        if (!applyInputEventProfile()) {

            LOG(ERROR) << "Couldn't apply input policy profile for " << name;

        }

    }

}



InputThread::~InputThread() {
@@ -63,4 +74,14 @@ bool InputThread::isCallingThread() { 
#endif

}



bool InputThread::applyInputEventProfile() {

#if defined(__ANDROID__)

    return SetTaskProfiles(mThread->getTid(), {"InputPolicy"});

#else

    // Since thread information is not available and there's no benefit of

    // applying the task profile on host, return directly.

    return true;

#endif

}



} // namespace android
 
 No newline at end of file

services/inputflinger/include/InputThread.h

+1 −0
Original line number Diff line number Diff line
@@ -38,6 +38,7 @@ private: 
    std::string mName;

    std::function<void()> mThreadWake;

    sp<Thread> mThread;

    bool applyInputEventProfile();

};



} // namespace android