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| shorne | zx2c4: I made a little qemu plugin to help get some better stats on what is going on when the wireguard test is slowing down | 09:33 |
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| shorne | it's called irqsampler, it will print total irqs per CPU per second | 09:33 |
| shorne | when it slows down the most there are no interrupts for multiple seconds | 09:36 |
| shorne | https://gist.github.com/stffrdhrn/deea77b7c14b5d10e4db5a2dda232c89 | 09:38 |
| shorne | The problem with existing qemu traces is that they just dump for every single instruction run etc, its impossible to get a good big picture | 09:39 |
| shorne | So, IRQ doesn't show much, but I will try to add some other summary like reports to this plugin | 09:40 |
| shorne | I think locks might be a good one | 09:40 |
| shorne | There are a lot of DTLB misses, we can see 100k+ per second, this is where making more tlb ways will help with performance | 09:49 |
| shorne | but I need to write a better tlb way replace mechanism to make it faster | 09:49 |
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