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by nbpname
3641 days ago
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We have an addon called the "Jit Inspector" [1], which should report the Assembly produced by IonMonkey. Last time I tried it not all panels where functional because it was still making attempts at reporting data from JaegerMonkey, which got removed since. The lastest solution I have seen so far is what we call the "Jit Coach" [2]. This is a devtools panel under the performance tab which reports if your function sticks in IonMonkey compiled code. Based on the MDN page this is behind a preference in "about:config". When we compile, we record the hypothesis made by the compiler, and use these to annotate the deoptimization paths which are taken. Each time we jump back to Baseline the tool reports why we jump back to Baseline. So far, only the front-end of IonMonkey and the deoptimization path are recorded. No other optimization phases are recorded at the moment. Sadly, it does not report the Assembly produced by IonMonkey. [1] https://addons.mozilla.org/en-US/firefox/addon/jit-inspector... [2] https://wiki.mozilla.org/DevTools/Performance/JIT |
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