Mesa CI Optimization Could Provide Big Bandwidth Savings
Written by Michael Larabel in Mesa on 3 July 2020 at 07:16 AM EDT. 24 Comments
MESA --
You may recall that earlier this year X.Org/FreeDesktop.org may have to cut CI services for developers over the cloud expenses associated with that continuous integration service for the likes of Mesa, the X.Org Server, and other components. CI usage was leading to a lot of bandwidth consumption so much so that the X.Org Foundation is facing potential ~70k USD cloud costs this year largely from their continuous integration setup.

Since then there has been some work on better optimizing their continuous integration setup with Jenkins and within the latest Mesa Git is some further tuning.

Thanks to the work by Benjamin Tissoires, git pull should now use a lot less bandwidth. Over the past week the Mesa CI setup consumed roughly 1.7TB of bandwidth while with the work by Ben there is better caching of Git trees.

Ben's final numbers were now when the CI runners need a git pull, only around 250KB is needed to download instead of pulling ~280MB of data. This change alone should be a big improvement for their CI setup in conserving bandwidth and in turn saving money for the open-source organization. It's a bit surprising it took this long though for more aggressive caching in their CI setup for such an important project to the Linux desktop.
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Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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