Intel CPU/Kernel Problem and BOINC

Message boards : Questions and problems : Intel CPU/Kernel Problem and BOINC
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ryanv09

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Message 84180 - Posted: 3 Jan 2018, 19:44:05 UTC
Last modified: 3 Jan 2018, 19:54:20 UTC

What are the ramifications of the new patch that Linux and Windows are putting out to address the kernel memory leak on Intel CPU's? Will my BOINC performance vary based on which project's tasks are running? Are some tasks more kernel intensive than others?
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SekeRob
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Message 84187 - Posted: 4 Jan 2018, 9:24:13 UTC - in response to Message 84180.  

Saw one post by a project developer at the forums of an umbrella project estimating there would not be impact on the typical DC apps execution. Soon you'll have the chance to benchmark your client and observe your projects of choice performance.
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Profile Ageless
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Message 84251 - Posted: 6 Jan 2018, 17:42:24 UTC

From https://newsroom.intel.com/news-releases/industry-testing-shows-recently-released-security-updates-not-impacting-performance-real-world-deployments/

As Intel and others across the industry partner to protect customers from the exploits (referred to as “Spectre” and “Meltdown”) reported Wednesday, extensive testing has been conducted to assess any impact to system performance from the recently released security updates. Apple, Amazon, Google and Microsoft are among those reporting that they are seeing little to no performance impact.
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karlfoley

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Message 84390 - Posted: 15 Jan 2018, 15:49:25 UTC - in response to Message 84251.  

Just out of interest, I benchmarked my laptop before and after the OS+BIOS patch for meltdown.

Before:
04/01/2018 16:52:28 | | Running CPU benchmarks
04/01/2018 16:52:59 | | Benchmark results:
04/01/2018 16:52:59 | | Number of CPUs: 4
04/01/2018 16:52:59 | | 3589 floating point MIPS (Whetstone) per CPU
04/01/2018 16:52:59 | | 11323 integer MIPS (Dhrystone) per CPU

After:
15/01/2018 15:31:35 | | Running CPU benchmarks
15/01/2018 15:32:06 | | Benchmark results:
15/01/2018 15:32:06 | | Number of CPUs: 4
15/01/2018 15:32:06 | | 3433 floating point MIPS (Whetstone) per CPU
15/01/2018 15:32:06 | | 8509 integer MIPS (Dhrystone) per CPU

Floating point appear to be down around 4%, but integer is down around 25%.
I would guess floating point has more of an impact on BOINC than integer?
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Message boards : Questions and problems : Intel CPU/Kernel Problem and BOINC

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