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Android: Pin emu thread to exclusive cores where supported

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This commit is contained in:
Connor McLaughlin
2021-01-27 00:36:13 +10:00
parent 700f916a34
commit 35dc530b9a
3 changed files with 45 additions and 0 deletions
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27
android/app/src/cpp/android_host_interface.cpp
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@ -22,6 +22,8 @@
#include "scmversion/scmversion.h"
#include <android/native_window_jni.h>
#include <cmath>
#include <unistd.h>
#include <sched.h>
#include <imgui.h>
Log_SetChannel(AndroidHostInterface);
@ -952,6 +954,31 @@ DEFINE_JNI_ARGS_METHOD(jstring, AndroidHostInterface_getFullScmVersion, jobject
g_scm_branch_str, __DATE__, __TIME__));
}
DEFINE_JNI_ARGS_METHOD(void, AndroidHostInterface_setThreadAffinity, jobject unused, jintArray cores)
{
// https://github.com/googlearchive/android-audio-high-performance/blob/c232c21bf35d3bfea16537b781c526b8abdcc3cf/SimpleSynth/app/src/main/cpp/audio_player.cc
int length = env->GetArrayLength(cores);
int* p_cores = env->GetIntArrayElements(cores, nullptr);
pid_t current_thread_id = gettid();
cpu_set_t cpu_set;
CPU_ZERO(&cpu_set);
for (int i = 0; i < length; i++)
{
Log_InfoPrintf("Binding to CPU %d", p_cores[i]);
CPU_SET(p_cores[i], &cpu_set);
}
int result = sched_setaffinity(current_thread_id, sizeof(cpu_set_t), &cpu_set);
if (result != 0)
Log_InfoPrintf("Thread affinity set.");
else
Log_ErrorPrintf("Error setting thread affinity: %d", result);
env->ReleaseIntArrayElements(cores, p_cores, 0);
}
DEFINE_JNI_ARGS_METHOD(jobject, AndroidHostInterface_create, jobject unused, jobject context_object,
jstring user_directory)
{