Add JIT heap free spaces checks to EE JIT #332
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PSI-Rockin
requested changes
Mar 15, 2020
| //Need to check we have space on the heap before running any recompiled code | ||
| //Resetting the heap during recompilation wipes out the prologue/epilogue! | ||
| //Checks for maximum 5mb block size of space before continuing | ||
| if (!jit_heap.has_free_space(1024 * 1024 * 5)) |
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I do not think this is the best place to make the JIT space check, especially considering how expensive the check is. We already have a flush_jit_cache variable that gets checked when EmotionEngine::run_jit is called.
Since only recompilation can decrease free space, a better course of action would be to do the space check inside the JIT's recompile_block method. When the check fails, we can set the flush_jit_cache variable in EmotionEngine, which will not only prevent the prologue/epilogue blocks from being trashed but also provide a speed boost compared to the current method in this PR.
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