Abhishek Kulkarni

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Most of HPC services are still designed around a centralized paradigm and hence are susceptible to scaling issues. P2P services have proved themselves at scale for wide-area internet workloads. Distributed key-value stores (KVS) are widely used as a building block for these services, but are not prevalent in HPC services. In this paper, we simulate KVS for(More)
Owing to the significant high rate of component failures at extreme scales, system services will need to be failure-resistant, adaptive and self-healing. A majority of HPC services are still designed around a centralized paradigm and hence are susceptible to scaling issues. Peer-to-peer services have proved themselves at scale for wide-area internet(More)
Modern parallel computing hardware demands increasingly specialized attention to the details of scheduling and load balancing across heterogeneous execution resources that may include GPU and cloud environments, in addition to traditional CPUs. Many existing solutions address the challenges of particular resources, but do so in isolation, and in general do(More)
—Owing to the extreme parallelism and the high component failure rates of tomorrow's exascale, high-performance computing (HPC) system software will need to be scalable, failure-resistant, and adaptive for sustained system operation and full system utilizations. Many of the existing HPC system software are still designed around a centralized server paradigm(More)
The precise recognition of appropriate synaptic partner neurons is a critical step during neural circuit assembly. However, little is known about the developmental context in which recognition specificity is important to establish synaptic contacts. We show that in the Drosophila visual system, sequential segregation of photoreceptor afferents, reflecting(More)
Load balancing techniques (e.g. work stealing) are important to obtain the best performance for distributed task scheduling system. In work stealing, tasks are randomly migrated from heavy-loaded schedulers to idle ones. However, for data-intensive applications where tasks are dependent and task execution involves processing large amount of data, migrating(More)
Domain-specific languages offer programming abstractions that enable higher efficiency, productivity and portability specific to a given application domain. Domain-specific languages such as StreamIt have valuable auto-parallelizing code-generators, but they require learning a new language and tool-chain and may not integrate easily with a larger(More)
—Long-running HPC applications guard against node failures by writing checkpoints to parallel file systems. Writing these checkpoints with petascale class machines has proven difficult and the increased concurrency demands of exascale computing will exacerbate this problem. To meet checkpointing demands and sustain application-perceived throughput at(More)