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Deadlock with MicroOps #95

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BugraEryilmaz opened this issue Dec 18, 2024 · 1 comment
Open

Deadlock with MicroOps #95

BugraEryilmaz opened this issue Dec 18, 2024 · 1 comment
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Description
There is a deadlock in one of the cpus while running 64 core data serving image.

Steps to Reproduce
Run data serving image with 64 cores
After some time, core 11 will stop making any progress
Expected Behavior
Every core should make some progress.

Actual Behavior
core 11 will stop making any progress.
@BugraEryilmaz BugraEryilmaz self-assigned this Dec 18, 2024
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The problem is that when a microop is being committed, it does not advance qemu. If that microop causes a page fault, flexus will resynchronize with QEMU. However, QEMU is not advanced, so flexus reads the same instruction again and again causing the page fault again and again. Deadlocking and not moving forward. Fix: b80c849

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