Brendan Gregg

FEBRUARY 28, 2023

My personal opinion is that I don't see a widespread need for more capacity given horizontal scaling and servers that can already exceed 1 Tbyte of DRAM; bandwidth is also helpful, but I'd be concerned about the increased latency for adding a hop to more memory. The call for participation ends on March 2nd 23:59 SGT! Ford, et al., “TCP

Performance 110

Performance Latency Cache Virtualization 110

Brendan Gregg

JULY 2, 2021

opensnoop Files opened table. biolatency Disk I/O latency histogram heat map. runqlat CPU scheduler latency heat map. I see people think like a programmer instead and feel they must start by learning bcc and BPF programming in depth. execsnoop New processes (via exec(2)) table. ext4slower Slow filesystem I/O table.

Latency 145

Latency Cache Energy Systems 145

Brendan Gregg

FEBRUARY 28, 2023

My personal opinion is that I don't see a widespread need for more capacity given horizontal scaling and servers that can already exceed 1 Tbyte of DRAM; bandwidth is also helpful, but I'd be concerned about the increased latency for adding a hop to more memory. It was a great privilege. That's about 24 hours from now!

Performance 52

Performance Latency Cache Virtualization 52

The Netflix TechBlog

NOVEMBER 22, 2019

To sustain this data growth at Netflix, it has deployed open-source software Ceph using AWS services to achieve the required SLOs of some of the post-production workflows. Netflix runs dozens of stateful services on AWS under strict sub-millisecond tail-latency requirements, which brings unique challenges.

AWS 37

AWS Entertainment Open Source Benchmarking 37

Brendan Gregg

JULY 2, 2021

If you're using an open source monitoring platform, first check if it already has a BPF agent. opensnoop Files opened table 3. biolatency Disk I/O latency histogram heat map 5. runqlat CPU scheduler latency heat map 10. Think of this as "version 1": A starting point that's pretty useful. BPF up and running!

Open Source 40

Open Source Latency Cache Energy 40