Vishal Sahu

Graduate Student, MS Department of Computer Science Stony Brook University Email: vishalsahunitt@gmail.com Phone: +1 631 542 3903 MB #917, Chapin Apartments, 700, Health Science Drive Stony Brook, NY 11790, USA

Projects

• Virtual Distributed File System, VMware, Palo Alto, CA Jun 2016 - Aug 2016

  • Optimized in-memory B-tree extent insertion to reduce meta data foot print.
  • Implemented read interface for VDFS to connect to remote AWS S3 storage backend using AWS C++ SDKs.
  • Implemented proc-like posix interface to list all the backend objects which user can see in organized directory structure.
  • Added feature of VSAN volume formatting using user defined policy.

• Design of 32-bit SPARC processor, CSE502, Computer Architecture, Stony Brook University Jan 2016 - May 2016

  • Designed 32-bit SPARC in-order Scalar processor with 5-Stage pipeline.
  • Implemented write-allocate write-back Direct-mapped instruction and data caches.
  • Implemented data forwarding from memory and write-back stages to resolve RAW dependencies to improve throughput of pipeline.

• Anti-malware stackable file system(amfs), CSE506, Operating Systems, Stony Brook University Sep 2015 - Nov 2015

  • Implemented a stackable file system that efficiently quarantines the files containing malware.
  • Developed mechanism to update pattern database with minimal re-scanning overhead by implementing update-on-write version keeping mechanism.
  • User can define and upload forbidden words database during mount time.

• Implementation of JOS, OSCAR Lab Feb 2016-May 2016

  • Implemented light configured 64-bit JOS from scratch, writing memory management, scheduler, process management and file system.

• Asynchronous utility module for Linux, CSE506, Stony Brook University Oct 2015-Dec 2015

  • Developed asynchronous job queuing mechanism based on producer-consumer design paradigm.
  • Implemented appropriate locking mechanisms to avoid races and deadlocks.
  • Formulated fair scheduling policy to prevent starvation of low priority jobs.

• Multimedia IP design, Samsung Research Institute, India Jun 2013-Jul 2015

  • Developed Scaler for Pinch-to-Zoom feature capable of scaling images in range of 0.25x - 4x.
  • Implemented SPIHT, wavelet coefficients based image compression algorithm.
  • Optimized run time of multimedia module by 60% using openGL vectorization on Qualcomm Adreno GPU.

• Optimization of Speech Recognition System, NIT Trichy May 2010-Jul 2010

  • Problem statement: Processing delay in real time speech recognition system results in bad user experience.
  • Optimized the run time of the speech-recognition system implemented in C++ by 20% using linear assembly without altering the detection accuracy.