Merge "Make purging clear the current thread cache too."
diff --git a/libc/bionic/jemalloc_wrapper.cpp b/libc/bionic/jemalloc_wrapper.cpp
index bc3a9dc..fd99814 100644
--- a/libc/bionic/jemalloc_wrapper.cpp
+++ b/libc/bionic/jemalloc_wrapper.cpp
@@ -103,6 +103,14 @@
}
return 1;
} else if (param == M_PURGE) {
+ // Only clear the current thread cache since there is no easy way to
+ // clear the caches of other threads.
+ // This must be done first so that cleared allocations get purged
+ // in the next calls.
+ if (je_mallctl("thread.tcache.flush", nullptr, nullptr, nullptr, 0) != 0) {
+ return 0;
+ }
+
unsigned narenas;
size_t sz = sizeof(unsigned);
if (je_mallctl("arenas.narenas", &narenas, &sz, nullptr, 0) != 0) {