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The Speed of Time

Brendan Gregg

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. Colleagues/Internet I love using [Linux performance tools]. How long does it take to read the time? How would you _time_ time?

Speed 103
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USENIX LISA2021 Computing Performance: On the Horizon

Brendan Gregg

## References I've reproduced the talk references below, so you can click on links: - [Gregg 08] Brendan Gregg, “ZFS L2ARC,” [link] Jul 2008 - [Gregg 10] Brendan Gregg, “Visualizations for Performance Analysis (and More),” [link] 2010 - [Greenberg 11] Marc Greenberg, “DDR4: Double the speed, double the latency? Ford, et al., “TCP

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IE11 and average speed update

Speed Curve

To keep inline with browser trends and average connection speeds SpeedCurve will begin updating the test setting every quarter. The 9.8Mbps download speed is based on the latest State of the Internet report from Akamai. The 9.8Mbps download speed is based on the latest State of the Internet report from Akamai.

Speed 40
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Does SSL Slow Down My Site?

MachMetrics

Many were hesitant to sacrifice site speed for the added layer of security if they felt like they didn’t need it. Google made SSL use a ranking factor way back in 2014, and since Chrome 68, a “Not Secure” warning appears next to the URL of sites that aren’t using HTTPS. So what’s the truth? Is SSL slow?

Speed 86
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The Speed of Time

Brendan Gregg

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. Colleagues/Internet I love using Linux performance tools. How long does it take to read the time? How would you time time?

Speed 52
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USENIX SREcon APAC 2022: Computing Performance: What's on the Horizon

Brendan Gregg

## References I've reproduced the references from my SREcon22 keynote below, so you can click on links: - [Gregg 08] Brendan Gregg, “ZFS L2ARC,” [link] Jul 2008 - [Gregg 10] Brendan Gregg, “Visualizations for Performance Analysis (and More),” [link] 2010 - [Greenberg 11] Marc Greenberg, “DDR4: Double the speed, double the latency?

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Trade-offs under pressure: heuristics and observations of teams resolving internet service outages (Part II)

The Morning Paper

Trade-offs under pressure: heuristics and observations of teams resolving internet service outages , Allspaw, Masters thesis, Lund University 2015. Today we’ll be digging into the analysis of an incident that took place at Etsy on December 4th, 2014. Monitoring for success also followed each corrective response action.