libsnapshot: set thread priority
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
diff --git a/fs_mgr/libsnapshot/snapuserd/user-space-merge/merge_worker.cpp b/fs_mgr/libsnapshot/snapuserd/user-space-merge/merge_worker.cpp
index bd7eaca..0f4674c 100644
--- a/fs_mgr/libsnapshot/snapuserd/user-space-merge/merge_worker.cpp
+++ b/fs_mgr/libsnapshot/snapuserd/user-space-merge/merge_worker.cpp
@@ -577,8 +577,10 @@
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";
}
diff --git a/fs_mgr/libsnapshot/snapuserd/user-space-merge/read_worker.cpp b/fs_mgr/libsnapshot/snapuserd/user-space-merge/read_worker.cpp
index d40b6d1..35a1621 100644
--- a/fs_mgr/libsnapshot/snapuserd/user-space-merge/read_worker.cpp
+++ b/fs_mgr/libsnapshot/snapuserd/user-space-merge/read_worker.cpp
@@ -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 @@
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";
}