diff options
| -rw-r--r-- | core/jni/com_android_internal_os_Zygote.cpp | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/core/jni/com_android_internal_os_Zygote.cpp b/core/jni/com_android_internal_os_Zygote.cpp index 4b969ece2e15..1ea7d6144356 100644 --- a/core/jni/com_android_internal_os_Zygote.cpp +++ b/core/jni/com_android_internal_os_Zygote.cpp @@ -1084,6 +1084,13 @@ static pid_t ForkCommon(JNIEnv* env, bool is_system_server, android_fdsan_error_level fdsan_error_level = android_fdsan_get_error_level(); + // Purge unused native memory in an attempt to reduce the amount of false + // sharing with the child process. By reducing the size of the libc_malloc + // region shared with the child process we reduce the number of pages that + // transition to the private-dirty state when malloc adjusts the meta-data + // on each of the pages it is managing after the fork. + mallopt(M_PURGE, 0); + pid_t pid = fork(); if (pid == 0) { |