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. How long does it take to read the time? How would you _time_ time? The CentOS flame graph: The Ubuntu flame graph: Darn, they didn't work.

Speed 126

Speed Java AWS Virtualization 126

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. How long does it take to read the time? How would you time time? Running this on the two systems saw similar results.

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. How long does it take to read the time? How would you _time_ time? The CentOS flame graph: The Ubuntu flame graph: Darn, they didn't work.

Speed 40

Speed Java AWS Virtualization 40