Brendan Gregg

Brendan Gregg is the lead performance engineer at Joyent, where he analyzes performance and scalability at any level of the software stack. He is the author of Systems Performance (Prentice Hall, 2013), and primary author of DTrace (Prentice Hall). He was previously a kernel engineer at Sun Microsystems where he developed the ZFS L2ARC, and has also developed numerous performance analysis tools. His recent work includes performance visualizations.