Harry (Hyeonggon) Yoo
Posts
490Following
96Followers
107- Linux Kernel Developer @ Oracle (Linux Kernel MM) (2025.02 ~ Present)
- Reviewer for the Linux Slab subsystem
- Former Intern @ NVIDIA, SK Hynix, Panmnesia (Security, MM and CXL)
- B.Sc. in Computer Science & Engineering, Chungnam National University (Class of 2025)
Opinions are my own.
My interests are:
Memory Management,
Computer Architecture,
Circuit Design,
Virtualization
Harry (Hyeonggon) Yoo
hyeyoo
Edited 1 year ago
There are a few remaining things I want to learn while I'm still an undergraduate:
Compilers, Electronic Circuit and VLSI
The latter two are tough and confusing...
Compilers, Electronic Circuit and VLSI
The latter two are tough and confusing...
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Harry (Hyeonggon) Yoo
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Fi 🏳️⚧️
munin@infosec.exchangeOK, here's a take for you:
PDFs are not a document format. Instead, as they encapsulate an executable (postscript) and a set of resources that are accessed in a sandboxed environment, they constitute a container.
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Harry (Hyeonggon) Yoo
repeated
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Thorsten Leemhuis (acct. 1/4)
kernellogger@fosstodon.orgAnnouncing #bpftop: Streamlining #eBPF performance optimization
"'"bpftop provides a dynamic real-time view of running eBPF programs. It displays the average execution runtime, events per second, and estimated total CPU % for each program. This tool minimizes overhead by enabling performance statistics only while it is active."'"
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This is what I've been developing at Purdue: detecting where the last reference to a memory was lost, aiming to help fix memory leaks. It's written on top of the LLVM compiler infrastructure.
It's still in development as an out-of-tree project and needs some more work :)
However, I believe this could help in resolving memory leaks.
It's still in development as an out-of-tree project and needs some more work :)
However, I believe this could help in resolving memory leaks.
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Harry (Hyeonggon) Yoo
hyeyoo
Edited 1 year ago
Visiting Scholar at Purdue University, West Lafayette, Indiana State (2024.01.04 ~ 2024.02.24)
Good bye Purdue University!
It has been so intense, now suffering from jet lag and getting back to real life.
Good bye Purdue University!
It has been so intense, now suffering from jet lag and getting back to real life.
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Harry (Hyeonggon) Yoo
hyeyoo
Edited 1 year ago
Was working out today wearing this tshirt, suddenly someone asked me "You use Linux? I use Arch by the way..."
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@ptesarik @lkundrak @ljs @sj @vbabka @Aissen
I got a reply from Lenovo HW team. For a reason that I don't understand, he said a part of 32GB DIMM belongs to a dual channel with 8GB DIMM and the remaining part belongs to a single channel thus a separate NUMA node.
```
[...]
the summary is that the performance for the two nodes is different. Node 0 is dual channel interleaved whereas Node 1 is single channel - so this is working as designed.
[...]
```
https://forums.lenovo.com/t5/ThinkBook-Laptops/BIOS-problem-Bogus-NUMA-configuration-on-thinkbook/m-p/5260517?page=1#6212698
I got a reply from Lenovo HW team. For a reason that I don't understand, he said a part of 32GB DIMM belongs to a dual channel with 8GB DIMM and the remaining part belongs to a single channel thus a separate NUMA node.
```
[...]
the summary is that the performance for the two nodes is different. Node 0 is dual channel interleaved whereas Node 1 is single channel - so this is working as designed.
[...]
```
https://forums.lenovo.com/t5/ThinkBook-Laptops/BIOS-problem-Bogus-NUMA-configuration-on-thinkbook/m-p/5260517?page=1#6212698
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Harry (Hyeonggon) Yoo
hyeyoo
My friend told me to play Minecraft together (It's been 4 years since last played) but I can't because Microsoft threw away my Mojang account 😠 😠
```As of December 18, 2023, the post-migration process for Mojang accounts has officially ended```
```As of December 18, 2023, the post-migration process for Mojang accounts has officially ended```
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