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Gitting
Foivos
zakkak
Gitting
Hi! I am Foivos (pronounced [‘fivos]) Zakkak and I am a Software Engineer in Red Hat’s Java platform team working on GraalVM and Mandrel.
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[XPS 15 Early 2017 9560 kabylake] Making Nvidia Drivers + (CUDA 8 / CUDA 9 / CUDA 9.1) + Bumblebee work together on linux ( Ubuntu / KDE Neon / Linux Mint / debian )
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Flame graphs are a nifty debugging tool to determine where CPU time is being spent. Using the Java Flight recorder, you can do this for Java processes without adding significant runtime overhead.
When are flame graphs useful?
Shivaram Venkataraman and I have found these flame recordings to be useful for diagnosing coarse-grained performance problems. We started using them at the suggestion of Josh Rosen, who quickly made one for the Spark scheduler when we were talking to him about why the scheduler caps out at a throughput of a few thousand tasks per second. Josh generated a graph similar to the one below, which illustrates that a significant amount of time is spent in serialization (if you click in the top right hand corner and search for "serialize", you can see that 78.6% of the sampled CPU time was spent in serialization). We used this insight to spee
The root filesystem is rootfs, which is stored in memory and therefore wiped on reboot. The Micro SD card is mounted at /tmp/fuse_d/. Something is also mounted at /tmp/fuse_a and /tmp/fuse_z.
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This commit message template helps you write great commit messages and enforce it across teams.
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