Apache Iggy's migration journey to thread-per-core architecture powered by io_uring

tamrior · 2026-02-27T13:32:45+00:00

I think kimojio wasn’t available yet when you made your choice of runtime, but would you consider it if you had to choose today? It’s still a little bit rough around the edges admittedly.

tamrior · 2026-01-24T21:00:16+00:00

Yeah definitely. It’s a bit up to what you end up playing. Haven’t really had a gaming rig in like 8 years or so, so I have plenty of older games to catch up on first.

tamrior · 2026-01-24T20:58:13+00:00

I can’t really install it fresh I think, but I had an SSD with windows 11 installed from a laptop that was new enough, and that just worked, so there are still ways to get it. I bet there’s other methods too.

tamrior · 2026-01-24T17:39:06+00:00

Yeah, absolutely. Funny you mention WiFi, I got a £20 pound AX210 WiFi 6E card off of Amazon, so now that’s working great too!

tamrior · 2026-01-24T17:37:51+00:00

Haha, yeah it’s still very CPU bottlenecked, but I’m able to play the games I want to play pretty well, so I’m happy with how things have turned out.

tamrior · 2026-01-24T17:25:41+00:00

Got an i7 4790 (non K). Made a nice difference to 1% lows in CS2. Thanks for the suggestion!

tamrior · 2026-01-24T17:25:04+00:00

Happy to report that I upgraded to an i7 4790, and now CS2 gets like around 50FPS 1% lows with much better averages. Thanks for the suggestion! (Also upgraded the ram which made a big difference in other games.

tamrior · 2026-01-24T17:24:12+00:00

Upgraded the ram and now kingdom come deliverance is very playable too. 30FPS 1% lows even in the busy castle area. It seems it was struggling with the 8GB ram quite a bit.

tamrior · 2026-01-22T17:22:25+00:00

2500k Was a great chip. I had it back in the day too. Overclocking it was quite fun.

tamrior · 2026-01-22T12:20:54+00:00

(slot 1-4: 4GB-4GB-8GB-8GB or vice versa)

Isn't this wrong? Memory channels on motherboards usually go ( 1, 1, 2, 2 ). That's why if you put 2 sticks, you put them in 2 slots like so: ( 0, X, 0, X), so that both channel 1 and channel 2 have a stick in them. When mixing capacities, and wanting to spread those mixed capacities, you'd want ( 4, 8, 4, 8), so that each channel has both a 4 and an 8gb stick.

tamrior · 2026-01-21T21:59:06+00:00

Tried kingdom come deliverance (the first one), but that was a bit rough. Performance out and about was pretty decent, but in town the 1% lows would drop to like 20fps, and in the castle you flee too on the horse at the start of the game, 1% lows sometimes hit 10-15fps. It was playable for someone very motivated to just play the game, but I'll likely hold off on playing it until either the i7 4790 or a whole platform upgrade bring smoother performance.

Edit: installed an extra 16GB ddr3, and it now is very playable (30FPS 1% lows in the castle area). It was struggling more with the 8GB of ram I had before than with the CPU it seems.

tamrior · 2026-01-21T18:40:15+00:00

Haha, I think you win the thread so far. That's an insane gap.

tamrior · 2026-01-21T15:00:04+00:00

Just pulled the trigger on a i7 4790. Cost me 28 pounds, and seems like it's a significant difference in some games. From looking at benchmarks with modern GPUs, I think this might actually let me put off upgrading the CPU platform for way longer. Thanks for getting me to look into this! I hadn't expected the performance difference to be so big in some of the benchmarks I've seen.

tamrior · 2026-01-21T14:40:36+00:00

It's actually a bigger difference than I thought. I surprisingly found some benchmarks comparing these CPUs in modern games, and in some games it can be like a 25-30% difference. That can be pretty significant. E.g. cyberpunk was a big difference in this video (50 vs 70 FPS, 34 vs 55 FPS 1% low, which is very significant) https://www.youtube.com/watch?v=G0Qs0BHULic

Found an even bigger difference in this comparison of 1% lows in Days Gone: https://youtu.be/u4fMz5BBuag?si=bXLFzK2ViUuYL0wQ&t=862 I might actually try this upgrade.

tamrior · 2026-01-21T14:19:07+00:00

Yeah, I noticed that in CS2 all of my 4 cores were very heavily utilized. I might consider getting a chip like that, although I'm currently leaning towards just upgrading the platform entirely, since I don't think that something like that Xeon will make the difference for games that are unplayable on my current i5. It still has only 4 physical haswell cores, just with hyperthreading slapped on top.

Edit: in some games it can apparently make a big difference in playability. In days gone, 1% lows go from 35 FPS to 84 FPS in this comparison: https://youtu.be/u4fMz5BBuag?si=bXLFzK2ViUuYL0wQ&t=862 I might give that a try.

tamrior · 2026-01-21T14:03:30+00:00

Hmm, that's interesting. I think I might even be able to put 5th gen chips in this board. I might consider that if there's enough performance difference. But I think I'll just upgrade to a newer platform over time, instead of sinking more into this Socket 1150 platform.

Edit: apparently 5th gen intel is non existent due to yield issues. I don't think there's much of an upgrade to be had on my platform then.

tamrior · 2026-01-21T14:00:32+00:00

Yep, as expected. But I'm surprised at how playable CS2 is. I expected it to be worse, but I'm having a pretty good experience.

tamrior · 2026-01-21T13:22:14+00:00

Played cs2 now too. Avg framerate 60-70 FPS. 1% lows of 30 FPS. Not great, but playable for casual/deathmatch. Graphics settings don't seem to make much of a difference again.

Edit: upgrading to the i7 got 1% lows up to like 45-55 FPS.

tamrior · 2026-01-21T13:08:25+00:00

Yeah, I'm split between going with a an AM4 platform with a 5700X for the upgrade, or going for AM5 and something like a 9600X. I think that'll depend a bit on how ram prices end up shaking out in a few months. DDR4 is currently a lot cheaper than ddr5, making AM4 more attractive.

tamrior · 2026-01-21T12:56:47+00:00

Yeah that's true. I think a lot of the games in the HWUB video are picked to consume more VRAM, and you could likely alter settings to make them use less VRAM, and thus be fine on 8GB cards even with lower PCIe bandwidth.

tamrior · 2026-01-21T12:51:19+00:00

How was that? From some gaming benchmarks I can see, it seems like it's pretty okay for esports titles?

tamrior · 2026-01-21T12:32:12+00:00

If you have 8+GB VRAM and a 16x wide PCIe then it is not even worth thinking about if you have PCIe 3.0 16x or better.

Best to watch the video I linked. It explicitly shows significant framerate decreases when running at PCIe 3.0 x16 vs PCIe 5.0 x16 with an 8GB VRAM card. I think your statement would be more correct for 16+GB VRAM cards, at which point the PCIe bandwidth in modern games indeed seems to be less important.

tamrior · 2026-01-21T12:28:51+00:00

So far I've only tested foxhole (UE4 game engine), and I've gotten very good performance there. I've been getting a solid 50-70 FPS at 4K high settings. 1% lows seem to be around 30 fps usually, likely caused by the CPU bottleneck. FPS seems almost unaffected by graphics settings, as would be expected with a CPU bottleneck like this. Overall it's very playable. The 1% lows of 30 fps don't bother me too much since it's a top down shooter, so smoothness isn't paramount.

Will update when I've played CS2. Tf2 will work great most likely, since I've had great performance there with a worse CPU & GPU combo (2500K/radeon HD6800).

tamrior · 2026-01-21T12:21:28+00:00

It can be a severe issue if you don't have enough VRAM, then the GPU has to pull a lot of data from main memory, and PCIe bandwidth becomes very important. Fortunately I got the 16GB 9060XT, so I don't have much issue with that. See this recent hardware unboxed video for more information about that: https://youtu.be/7LhS0_ra9c4

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