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Kaushik Srenevasankaushik@srevas.net |
I'm currently a Staff Software Engineer at Twitter where I hack on the Hotspot Java VM, GDB and other things.
I've been working lately, on improving the observability of the Hotspot JVM. Specifically, getting Hotspot to talk to native Linux tools like GDB (code) and the Perf profiler.
Formerly worked on the Chakra Javascript Runtime and the .NET Common Language Runtime (CLR) at Microsoft. Authored Chakra's AMD64 optimizing JIT compiler and runtime. I also designed and implemented IE's Javascript CPU profiler and its API.
Updates
May 2016
- A short piece I wrote using the Seaboard. Both the violin and upright bass are Equator presets.
- A ROLI Seaboard is my newest acquisition, obsession. A complete guide to programming multi-channel MIDI in Logic X forthcoming.
Just setting up my @WeAreROLI seaboard. pic.twitter.com/TtKVHYgMDr
— kaushik (@ksrenev) May 7, 2016 January 2016
- My signature tune for Seattle Saaral - Seattle's first tamil radio station is now live!
July 2014
Recent talks
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July 2014, OSCON, Portland, OR, Tracing and profiling Java (and native) applications
in Production (slides).
The ability to understand the behavior of a software system so as to be able to answer questions about its health, while important has always been a challenge for software developers. System tools or language debuggers and profilers tend to be myopic in their scope and cumbersome to understand, setup and use; More so when applied to a distributed system. Specifically, requiring recompilation of software with additional instrumentation, adding a non-trivial performance overhead, and, equally importantly, requiring an elaborate setup renders tools unfit to be used in production.
This talk describes a new, low overhead, full stack tool (based on the Linux perf profiler and infrastructure built into the Hotspot JVM) we’ve built at Twitter to help solve this problem of dynamically profiling and tracing the behavior of the kernel and applications (including managed runtimes like the JVM) in production.
- November 2013, Twitter University, San Francisco, CA, Profiling Java in production.
Projects
A non-exhaustive list of stuff I've built or worked on over the years:
- Source GIT, Twitter's fork of the Git distributed version control system.
- TwitterJDK, Twitter's fork of the OpenJDK.
- Kiji, Twitter's fork of the Ruby VM.
- The AMD64 backend compiler for the Chakra Javascript engine that ships in Internet Explorer 9 and above.
- Internet Explorer's Javascript CPU profiler and it's API.
- NGEN PDB support for the .NET CLR.
- GDB.
Notes
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The ROLI Seaboard RISE 49
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Debugging dynamically generated code in Emacs GUD
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jmp mscoree!_CorExeMain
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Writing a multiboot PE kernel: part 2
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Writing multiboot PE kernels using Visual C++
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SSCLI GC: Implementation notes
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A.R.Rahman's studio equipment
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