Brendan Gregg

MARCH 16, 2024

2014: Java in Flames Broken Java Stacks (2014) When I joined Netflix in 2014, I found Java's lack of frame pointer support broke all application stacks (pictured in my 2014 Surge talk on the right). Java, for example, has the -XX:+PreserveFramePointer option.

Java 145

Java Cache Google Hardware 145

Brendan Gregg

SEPTEMBER 25, 2021

These strange questions came to the fore back in 2014 when Netflix was switching services from CentOS Linux to Ubuntu, and I helped debug several weird performance issues including one I'll describe here. There's no Java stack—there should be a tower of green Java methods—instead there's only a single green frame or two.

Speed 126

Speed Java AWS Virtualization 126

The Morning Paper

OCTOBER 1, 2020

That app is subject to “voluminous (public) user feedback”, and in the 2014 floating-point based calculator, bug reports relating to inaccurate results, unnecessary zeroes, and the like. For calculators, spreadsheets, and many other applications we don’t need the raw performance of hardware floating point operations.

Java 143

Java Hardware Open Source Testing 143

Brendan Gregg

SEPTEMBER 25, 2021

These strange questions came to the fore back in 2014 when Netflix was switching services from CentOS Linux to Ubuntu, and I helped debug several weird performance issues including one I'll describe here. This is how Java flame graphs looked at the time. Maybe Java is calling it more often for some reason.

Speed 52

Speed Java AWS Virtualization 52

Brendan Gregg

SEPTEMBER 25, 2021

These strange questions came to the fore back in 2014 when Netflix was switching services from CentOS Linux to Ubuntu, and I helped debug several weird performance issues including one I'll describe here. There's no Java stack—there should be a tower of green Java methods—instead there's only a single green frame or two.

Speed 40

Speed Java AWS Virtualization 40