human: Given a node-centered hypergraph: <hypergraph>, where nodes represent papers and hyperedges represent sets of papers co-cited by a source paper.

Details of the hypergraph:
Center node: "the influence of malloc placement on tsx hardware transactional memory"
  Abstract: In this paper, we demonstrate the impact of the placement policies of memory allocators on the performance of applications that use hardware transactional memory. In particular, commonly used allocators such as the default GNUglib malloc allocator may place objects in such a way that causes hardware transactions to consistently abort, even when running single-threaded. In multithreaded applications, these consistent aborts can force applications to fall back to using locks, significantly limiting the parallelism. We also show that using index-aware allocators can avoid these pathological memory placements. We have observed read-only transactions commit where the ca che footprint exceeds the L2 size, but have never observed tr ansactions commit where the footprint is above the size of th e L3 with TSX-RTM, misses turn into aborts aborts : amplify impac t of misses; wasted cycles; loss of write-set from L1 aborts a lso force slow-path and loss of concurrent execution for TLE Thread-local problem shifts to global impediment Misses be come aborts become serialization

Connected through hyperedge HE-1 (induced by source paper "toward efficient in memory data analytics on numa systems"):
  with members:
    - "likwid a lightweight performance oriented tool suite for x86 multicore environments"
    - "likwid a lightweight performance oriented tool suite for x86 multicore environments"

Question: Please tell me which class the center node belongs to. The 40 classes are: cs.NA(Numerical Analysis), cs.MM(Multimedia), cs.LO(Logic in Computer Science), cs.CY(Computers and Society), cs.CR(Cryptography and Security), cs.DC(Distributed, Parallel, and Cluster Computing), cs.HC(Human-Computer Interaction), cs.CE(Computational Engineering, Finance, and Science), cs.NI(Networking and Internet Architecture), cs.CC(Computational Complexity), cs.AI(Artificial Intelligence), cs.MA(Multiagent Systems), cs.GL(General Literature), cs.NE(Neural and Evolutionary Computing), cs.SC(Symbolic Computation), cs.AR(Hardware Architecture), cs.CV(Computer Vision and Pattern Recognition), cs.GR(Graphics), cs.ET(Emerging Technologies), cs.SY(Systems and Control), cs.CG(Computational Geometry), cs.OH(Other Computer Science), cs.PL(Programming Languages), cs.SE(Software Engineering), cs.LG(Machine Learning), cs.SD(Sound), cs.SI(Social and Information Networks), cs.RO(Robotics), cs.IT(Information Theory), cs.PF(Performance), cs.CL(Computation and Language), cs.IR(Information Retrieval), cs.MS(Mathematical Software), cs.FL(Formal Languages and Automata Theory), cs.DS(Data Structures and Algorithms), cs.OS(Operating Systems), cs.GT(Computer Science and Game Theory), cs.DB(Databases), cs.DL(Digital Libraries), cs.DM(Discrete Mathematics). Directly output the class name.

gpt: cs.OS(Operating Systems)