启用tcmalloc编译后，在测试机上调试启动运行都没有问题，但是上了线上服务器后就无法启动，CPU占用还非常高，pstack看了下，死锁了，线程全部卡在spinlock下面，又折回去发现在我开发机上就不会走到SpinLock::SlowLock这个函数，没辙，老老实实自己折腾个内存池吧
Thread 5 (Thread 0x7f848c753700 (LWP 4197)):
#0 0x00007f8489a78fd0 in base::internal::SpinLockDelay(int volatile*, int, int) () from /usr/local/lib/libtcmalloc.so.4
#1 0x00007f8489a78dbc in SpinLock::SlowLock() () from /usr/local/lib/libtcmalloc.so.4
#2 0x00007f8489a69065 in tcmalloc::CentralFreeList::Populate() () from /usr/local/lib/libtcmalloc.so.4
#3 0x00007f8489a692a0 in tcmalloc::CentralFreeList::FetchFromOneSpansSafe(int, void**, void**) () from /usr/local/lib/libtcmalloc.so.4
#4 0x00007f8489a69343 in tcmalloc::CentralFreeList::RemoveRange(void**, void**, int) () from /usr/local/lib/libtcmalloc.so.4
#5 0x00007f8489a6d3e5 in tcmalloc::ThreadCache::FetchFromCentralCache(unsigned long, unsigned long) () from /usr/local/lib/libtcmalloc.so.4
#6 0x00007f8489a5c193 in (anonymous namespace)::cpp_alloc(unsigned long, bool) () from /usr/local/lib/libtcmalloc.so.4
#7 0x00007f8489a7bc98 in tc_new () from /usr/local/lib/libtcmalloc.so.4
#8 0x0000003f5309c3c9 in std::basic_string<char, std::char_traits<char>, std::allocator<char> >::_Rep::_S_create(unsigned long, unsigned long, std::allocator<char> const&) () from /usr/lib64/libstdc++.so.6
#9 0x0000003f5309ddaa in std::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_mutate(unsigned long, unsigned long, unsigned long) () from /usr/lib64/libstdc++.so.6
#10 0x0000003f5309df6c in std::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_replace_safe(unsigned long, unsigned long, char const*, unsigned long) () from /usr/lib64/libstdc++.so.6
#11 0x00007f848a4c4708 in ?? ()
#12 0x0000000000000000 in ?? ()
Thread 4 (Thread 0x7f848bd52700 (LWP 4199)):
#0 0x00007f8489a78fd0 in base::internal::SpinLockDelay(int volatile*, int, int) () from /usr/local/lib/libtcmalloc.so.4
#1 0x00007f8489a78dbc in SpinLock::SlowLock() () from /usr/local/lib/libtcmalloc.so.4
#2 0x00007f8489a6db63 in tcmalloc::ThreadCache::CreateCacheIfNecessary() () from /usr/local/lib/libtcmalloc.so.4
#3 0x00007f8489a5c2d6 in (anonymous namespace)::cpp_alloc(unsigned long, bool) () from /usr/local/lib/libtcmalloc.so.4
#4 0x00007f8489a7bc98 in tc_new () from /usr/local/lib/libtcmalloc.so.4
#5 0x00007f848a4b641f in ?? ()
#6 0x0000000000000000 in ?? ()
Thread 3 (Thread 0x7f848b351700 (LWP 4200)):
#0 0x00007f8489a78fd0 in base::internal::SpinLockDelay(int volatile*, int, int) () from /usr/local/lib/libtcmalloc.so.4
#1 0x00007f8489a78dbc in SpinLock::SlowLock() () from /usr/local/lib/libtcmalloc.so.4
#2 0x00007f8489a69065 in tcmalloc::CentralFreeList::Populate() () from /usr/local/lib/libtcmalloc.so.4
#3 0x00007f8489a692a0 in tcmalloc::CentralFreeList::FetchFromOneSpansSafe(int, void**, void**) () from /usr/local/lib/libtcmalloc.so.4
#4 0x00007f8489a69343 in tcmalloc::CentralFreeList::RemoveRange(void**, void**, int) () from /usr/local/lib/libtcmalloc.so.4
#5 0x00007f8489a6d3e5 in tcmalloc::ThreadCache::FetchFromCentralCache(unsigned long, unsigned long) () from /usr/local/lib/libtcmalloc.so.4
#6 0x00007f8489a5c193 in (anonymous namespace)::cpp_alloc(unsigned long, bool) () from /usr/local/lib/libtcmalloc.so.4
#7 0x00007f8489a7bc98 in tc_new () from /usr/local/lib/libtcmalloc.so.4
#8 0x0000003f5309c3c9 in std::basic_string<char, std::char_traits<char>, std::allocator<char> >::_Rep::_S_create(unsigned long, unsigned long, std::allocator<char> const&) () from /usr/lib64/libstdc++.so.6
#9 0x0000003f5309ddaa in std::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_mutate(unsigned long, unsigned long, unsigned long) () from /usr/lib64/libstdc++.so.6
#10 0x0000003f5309df6c in std::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_replace_safe(unsigned long, unsigned long, char const*, unsigned long) () from /usr/lib64/libstdc++.so.6
#11 0x00007f848a4fcfe3 in ?? ()
#12 0x6120726f6620257b in ?? ()
#13 0x6c6461206e692064 in ?? ()
Thread 1 (Thread 0x7f84a15f4700 (LWP 4026)):
#0 0x00007f8489a78fd0 in base::internal::SpinLockDelay(int volatile*, int, int) () from /usr/local/lib/libtcmalloc.so.4
#1 0x00007f8489a78dbc in SpinLock::SlowLock() () from /usr/local/lib/libtcmalloc.so.4
#2 0x00007f8489a6db63 in tcmalloc::ThreadCache::CreateCacheIfNecessary() () from /usr/local/lib/libtcmalloc.so.4
#3 0x00007f8489a5c2d6 in (anonymous namespace)::cpp_alloc(unsigned long, bool) () from /usr/local/lib/libtcmalloc.so.4
#4 0x00007f8489a7bc98 in tc_new () from /usr/local/lib/libtcmalloc.so.4
#5 0x0000003f5309c3c9 in std::basic_string<char, std::char_traits<char>, std::allocator<char> >::_Rep::_S_create(unsigned long, unsigned long, std::allocator<char> const&) () from /usr/lib64/libstdc++.so.6
#6 0x0000003f5309cde5 in ?? () from /usr/lib64/libstdc++.so.6
#7 0x0000003f5309cf33 in std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string(char const*, std::allocator<char> const&) () from /usr/lib64/libstdc++.so.6
原文地址：http://1038741.blog.51cto.com/1028741/1936988
