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. Ford, et al., “TCP

Performance 110

Performance Latency Cache Virtualization 110

Brendan Gregg

JULY 2, 2021

biolatency Disk I/O latency histogram heat map. cachestat File system cache statistics line charts. runqlat CPU scheduler latency heat map. This is thinking like a sysadmin who installs and maintains software, and not like a programmer who codes everything. execsnoop New processes (via exec(2)) table. That's the fast way.

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. Ford, et al., “TCP

Performance 52

Performance Latency Cache Virtualization 52

ACM Sigarch

MARCH 18, 2019

Existing systems can be studied with measurement, while prospective systems are most often studied by extrapolating from measurements of prior systems or via simulation software that mimics target system function and provides performance metrics. Can one both minimize latency and maximize throughput for unscheduled work? Little’s Law.

Systems 60

Systems Latency Performance Analytics 60

The Morning Paper

JANUARY 23, 2020

Today we’ll be digging into the analysis of an incident that took place at Etsy on December 4th, 2014. 1:18pm a key observation was made that an API call to populate the homepage sidebar saw a huge jump in latency. This is part 2 of our look at Allspaw’s 2015 master thesis (here’s part 1 ). The last word.

Internet 53

Internet Internet Cache Engineering 53

Brendan Gregg

JULY 2, 2021

biolatency Disk I/O latency histogram heat map 5. cachestat File system cache statistics line charts 7. runqlat CPU scheduler latency heat map 10. They need constant updates to keep working across different software versions. The problems I'm describing are specific to BPF software and kernel tracing. at the time.

Open Source 40

Open Source Latency Cache Energy 40

Alex Russell

APRIL 29, 2021

Delayed three years ( Chrome 40, November 2014 vs. Safari 11.1, A subset ( element.animate() ) has enabled developers to more easily create high-performance visual effects with lower risk of visual stuttering in Chrome and Firefox since 2014. Critical in adapting web content to mobile, particularly regarding multi-touch gestures.

Media 145

Media Games Education Engineering 145