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Meltdown and Spectre bugs: Difference between revisions
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→What are the impacts ?
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=== Performance impacts === | === Performance impacts === | ||
Many groups around the world, including within Compute Canada, are running various benchmarks. Numbers cited can sometimes be scary (up to 30 or even 50% performance hit), while | Many groups around the world, including within Compute Canada, are running various benchmarks. Numbers cited can sometimes be scary (up to 30 or even 50% performance hit), while others are very minimal. Tasks which do a lot of input/output (reading and writing files) seem to be most impacted. Such tasks include databases, file transfer (rsync). Typical high performance tasks and GPU tasks are not affected nearly as much. Different processor generations are also affected at different levels. If you suspect your jobs may incur a large performance penalty, we recommend that you compare its performance before and after. You can also contact our [[Technical support]] to get help, but keep in mind that code modification may be required to lessen the performance impact on any given code. | ||
Below, you will find various links pointing to performance benchmarks. Keep in mind that those were not necessarily run on hardware and operating system similar to what Compute Canada clusters are running. | Below, you will find various links pointing to performance benchmarks. Keep in mind that those were not necessarily run on hardware and operating system similar to what Compute Canada clusters are running. | ||