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libsnapshot: set thread priority

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Read merge thread + worker thread priority from build configurations. In
the case of low memory devices, a lower priority will reduce CPU
utilization post OTA reboot.

Test: th
Change-Id: I812fccf2ca805d9686a837774e1770a2eebf979a
This commit is contained in:
Daniel Zheng 2024-05-28 18:25:12 -07:00
parent 54d6c0cf45
commit db560090e4
2 changed files with 8 additions and 2 deletions
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4
fs_mgr/libsnapshot/snapuserd/user-space-merge/merge_worker.cpp
View file

@ -577,8 +577,10 @@ bool MergeWorker::Run() {
SNAP_LOG(ERROR) << "Merge terminated early...";
return true;
}
auto merge_thread_priority = android::base::GetUintProperty<uint>(
"ro.virtual_ab.merge_thread_priority", ANDROID_PRIORITY_BACKGROUND);
if (!SetThreadPriority(ANDROID_PRIORITY_BACKGROUND)) {
if (!SetThreadPriority(merge_thread_priority)) {
SNAP_PLOG(ERROR) << "Failed to set thread priority";
}

6
fs_mgr/libsnapshot/snapuserd/user-space-merge/read_worker.cpp
View file

@ -17,8 +17,10 @@
#include <libsnapshot/cow_format.h>
#include <pthread.h>
#include "android-base/properties.h"
#include "read_worker.h"
#include "snapuserd_core.h"
#include "user-space-merge/worker.h"
#include "utility.h"
namespace android {
@ -259,8 +261,10 @@ bool ReadWorker::Run() {
SNAP_LOG(INFO) << "Processing snapshot I/O requests....";
pthread_setname_np(pthread_self(), "ReadWorker");
auto worker_thread_priority = android::base::GetUintProperty<uint>(
"ro.virtual_ab.worker_thread_priority", ANDROID_PRIORITY_NORMAL);
if (!SetThreadPriority(ANDROID_PRIORITY_NORMAL)) {
if (!SetThreadPriority(worker_thread_priority)) {
SNAP_PLOG(ERROR) << "Failed to set thread priority";
}