| // -*- Mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- |
| // Copyright (c) 2003, Google Inc. |
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| |
| // --- |
| // Author: Sanjay Ghemawat |
| // |
| // MallocExtension::MarkThreadIdle() testing |
| #include "config_for_unittests.h" |
| |
| #include <gperftools/malloc_extension.h> |
| |
| #include <stdio.h> |
| |
| #include <new> |
| #include <thread> |
| |
| #include "gtest/gtest.h" |
| |
| // Helper routine to do lots of allocations |
| static void TestAllocation() { |
| static const int kNum = 100; |
| void* ptr[kNum]; |
| for (int size = 8; size <= 65536; size*=2) { |
| for (int i = 0; i < kNum; i++) { |
| ptr[i] = ::operator new(size); |
| } |
| for (int i = 0; i < kNum; i++) { |
| ::operator delete(ptr[i]); |
| } |
| } |
| } |
| |
| // Routine that does a bunch of MarkThreadIdle() calls in sequence |
| // without any intervening allocations |
| TEST(MarkIdleTest, MultipleIdleCalls) { |
| std::thread t([] () { |
| for (int i = 0; i < 4; i++) { |
| MallocExtension::instance()->MarkThreadIdle(); |
| } |
| }); |
| |
| t.join(); |
| } |
| |
| // Routine that does a bunch of MarkThreadIdle() calls in sequence |
| // with intervening allocations |
| TEST(MarkIdleTest, MultipleIdleNonIdlePhases) { |
| std::thread t([] () { |
| for (int i = 0; i < 4; i++) { |
| TestAllocation(); |
| MallocExtension::instance()->MarkThreadIdle(); |
| } |
| }); |
| |
| t.join(); |
| } |
| |
| // Get current thread cache usage |
| static size_t GetTotalThreadCacheSize() { |
| size_t result; |
| EXPECT_TRUE(MallocExtension::instance()->GetNumericProperty( |
| "tcmalloc.current_total_thread_cache_bytes", |
| &result)); |
| return result; |
| } |
| |
| // Check that MarkThreadIdle() actually reduces the amount |
| // of per-thread memory. |
| TEST(MarkIdleTest, TestIdleUsage) { |
| std::thread t([] () { |
| const size_t original = GetTotalThreadCacheSize(); |
| |
| TestAllocation(); |
| const size_t post_allocation = GetTotalThreadCacheSize(); |
| EXPECT_GT(post_allocation, original); |
| |
| MallocExtension::instance()->MarkThreadIdle(); |
| const size_t post_idle = GetTotalThreadCacheSize(); |
| EXPECT_LE(post_idle, original); |
| |
| // Log after testing because logging can allocate heap memory. |
| printf("Original usage: %zu\n", original); |
| printf("Post allocation: %zu\n", post_allocation); |
| printf("Post idle: %zu\n", post_idle); |
| }); |
| |
| t.join(); |
| } |