MCMalloc: A scalable memory allocator for multithreaded applications on a many-core shared-memory machine

In the big data era, multithreaded processing on a many-core machine, whose core number is still increasing, has become essential to parallelize the execution of big data applications, besides distributed computing. In such a machine, malloc-intensive applications cannot scale due to lock contentions among threads, which becomes worse as the number of threads increases. To solve the problem, we propose a new method to reduce lock contentions by batch malloc, pseudo free, and fine-grained data-locking. Experimental result shows 4.72 times speed-up in comparison with JEmalloc which is the fastest memory allocator among previous ones.