Name: Hybrid THP Mechanism. Selective Use of Huge Pages by Hot Applications - Asier Gutierrez, Huawei
Start: 2025-08-26T14:10:00+0200
End: 2025-08-26T14:50:00+0200

25-27, August 2025
Amsterdam, Netherlands
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Tuesday August 26, 2025 14:10 - 14:50 CEST

G104

Currently, THP policies are used globally, for the entire system. This leads to memory fragmentation and memory waste. Main memory has increased a lot faster than TLB entries, and it will continue to do so. Given the limited TLB cache entries, this becomes a serious bottleneck for real world applications. Huge pages are supposed to resolve this issue, since the a single entry in the TLB can map a big chunk of memory. However, this eventually leads to memory fragmentation and eventually the system runs out of usable memory. Hence, most sysadmins and user space application suggest to disable huge pages

We introduce a hybrid page mechanism where hot applications can use huge pages transparently, while avoiding the entire system to use huge pages.

During the talk, we will show how we managed to decrease the huge page consumption as well as benchmarks on real applications.

Speakers

Asier Gutierrez

Staff software engineer, Huawei

I am a seasoned software engineer, with a wide background in product and system programming. I have worked for big companies like Intel, IBM and Yandex, as well as small startups. I spoke at the Open Source Summit Europe in 2023 where I showed how IMA namespaces can be used to achieve... Read More →

Tuesday August 26, 2025 14:10 - 14:50 CEST
G104

Linux

Audience Experience Level Any

Open Source Summit Europe 2025

Asier Gutierrez

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