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Commit ae211b44 authored by Wei Wang's avatar Wei Wang
Browse files

Surfacefinger: Set HWC Callback to SCHED_FIFO 

IComposerCallback is on critical path to correct vsync, this CL makes
the callback runs in SCHED_FIFO to minimize scheduling latency.

Bug: 133241520
Test: Build
Change-Id: Ifda73c4b33771763c2b58b25d32b805ed602369a
parent 6059fa3e

services/surfaceflinger/DisplayHardware/ComposerHal.cpp

+2 −0
Original line number Original line Diff line number Diff line
@@ -24,6 +24,7 @@ 




#include <composer-command-buffer/2.2/ComposerCommandBuffer.h>

#include <composer-command-buffer/2.2/ComposerCommandBuffer.h>

#include <gui/BufferQueue.h>

#include <gui/BufferQueue.h>

#include <hidl/HidlTransportSupport.h>

#include <hidl/HidlTransportUtils.h>

#include <hidl/HidlTransportUtils.h>





namespace android {

namespace android {
@@ -229,6 +230,7 @@ std::string Composer::dumpDebugInfo() 




void Composer::registerCallback(const sp<IComposerCallback>& callback)

void Composer::registerCallback(const sp<IComposerCallback>& callback)

{

{

    android::hardware::setMinSchedulerPolicy(callback, SCHED_FIFO, 2);

    auto ret = mClient->registerCallback(callback);

    auto ret = mClient->registerCallback(callback);

    if (!ret.isOk()) {

    if (!ret.isOk()) {

        ALOGE("failed to register IComposerCallback");

        ALOGE("failed to register IComposerCallback");