commit 9a467f3e517cdd2013ff02a83b8f610ec0e44f3d
author Sadrul Chowdhury <sadrul@google.com> Thu Feb 08 05:30:28 2024 +0000
committer Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com> Thu Feb 08 05:30:28 2024 +0000
tree e8a2e11fef9232cdb25c8952ce8fc71ec2579d44
parent aca56c7fa77208126037efeb982e3e8c88dea853
parent d381ec194f08d4cc8716b6e8ba8cf185aed58bbd

Merge "Boost process priority during fork." into main am: a6519982a6 am: d381ec194f

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2954708

Change-Id: Ie64d07a26103682904d2845e5262890028377def
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

core/jni/com_android_internal_os_Zygote.cpp

diff --git a/core/jni/com_android_internal_os_Zygote.cpp b/core/jni/com_android_internal_os_Zygote.cpp
index 58166bf..0938ce17 100644
--- a/core/jni/com_android_internal_os_Zygote.cpp
+++ b/core/jni/com_android_internal_os_Zygote.cpp
@@ -2416,6 +2416,11 @@
                          const std::vector<int>& fds_to_ignore,
                          bool is_priority_fork,
                          bool purge) {
+  ATRACE_CALL();
+  if (is_priority_fork) {
+    setpriority(PRIO_PROCESS, 0, PROCESS_PRIORITY_MAX);
+  }
+
   SetSignalHandlers();
 
   // Curry a failure function.
@@ -2501,6 +2506,10 @@
   // We blocked SIGCHLD prior to a fork, we unblock it here.
   UnblockSignal(SIGCHLD, fail_fn);
 
+  if (is_priority_fork && pid != 0) {
+    setpriority(PRIO_PROCESS, 0, PROCESS_PRIORITY_DEFAULT);
+  }
+
   return pid;
 }
 
@@ -2570,6 +2579,7 @@
         JNIEnv* env, jclass, uid_t uid, gid_t gid, jintArray gids,
         jint runtime_flags, jobjectArray rlimits, jlong permitted_capabilities,
         jlong effective_capabilities) {
+  ATRACE_CALL();
   std::vector<int> fds_to_close(MakeUsapPipeReadFDVector()),
                    fds_to_ignore(fds_to_close);
 
@@ -2645,6 +2655,7 @@
                                                          jintArray managed_session_socket_fds,
                                                          jboolean args_known,
                                                          jboolean is_priority_fork) {
+  ATRACE_CALL();
   std::vector<int> session_socket_fds =
       ExtractJIntArray(env, "USAP", nullptr, managed_session_socket_fds)
           .value_or(std::vector<int>());
@@ -2660,6 +2671,7 @@
                     bool args_known,
                     bool is_priority_fork,
                     bool purge) {
+  ATRACE_CALL();
 
   std::vector<int> fds_to_close(MakeUsapPipeReadFDVector()),
                    fds_to_ignore(fds_to_close);