{"id":41840,"date":"2020-02-17T05:33:00","date_gmt":"2020-02-17T02:33:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/google-opublikoval-novyj-variant-sistemy-raspredeleniya-pamyati-tcmalloc"},"modified":"2020-02-17T05:33:00","modified_gmt":"2020-02-17T02:33:00","slug":"google-opublikoval-novyj-variant-sistemy-raspredeleniya-pamyati-tcmalloc","status":"publish","type":"post","link":"https:\/\/prohoster.info\/en\/blog\/google-opublikoval-novyj-variant-sistemy-raspredeleniya-pamyati-tcmalloc","title":{"rendered":"Google has released a new version of the memory distribution system TCMalloc.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Google Inc. introduced<\/a><\/noindex> a new version of the memory allocation system TCMalloc<\/a><\/noindex>, which is used in many internal Google projects. The TCMalloc code is written in C++ and is distributed<\/a><\/noindex> is licensed under the Apache license. To operate, a compiler supporting C++17 for C++ and C11 for C (gcc 9.2+ or clang 9.0+) is required. Of operating systems is supported<\/a><\/noindex> only Linux (x86, PPC).<\/p>\n

It is noteworthy that since 2005 there has been another version of tcmalloc that was supplied<\/a><\/noindex> as part of the package gperftools<\/a><\/noindex> (Google Performance Tools). These are two different<\/a><\/noindex> projects that have common roots. The new TCMalloc is more of an attempt to open the code of current internal developments at Google, but it is not yet aimed at providing a stable ABI and supporting a wide range of operating systems. The maintenance of the old tcmalloc from gperftools will continue, but new features such as CPU cache binding will not be transferred to it.<\/p>\n

TCMalloc includes an implementation of the C function malloc() and the C++ operator «new», optimized for high performance and use in multithreaded applications. TCMalloc also provides introspection and profiling capabilities, allowing the application to gain detailed insights into memory usage in the heap. The code uses optimizations based on modern features of the C++ language, such as
\nthe delete operator with size specification<\/a><\/noindex> from C++14 and memory allocation with alignment<\/a><\/noindex> from C++17.<\/p>\n

TCMalloc consists<\/a><\/noindex> consists of three components: a frontend with a cache for fast allocation and deallocation of memory, a layer for filling the frontend cache, and a backend that performs operations such as obtaining memory from the operating system, managing large chunks of unused memory, and returning excess memory back to the OS. The cache is free from locks and works in association with CPU cores, but reverts to a thread-bound caching model if the necessary functionality is absent in the OS kernel (CPU cache binding works only in recent Linux kernels). The backend supports working with both regular memory pages and large pages (hugepage).<\/p>\n

\"Google<\/a><\/noindex><\/center><\/p>\n

Key features of TCMalloc:<\/p>\n