Dynamically determine whether to pool for wasmtime serve
#8610
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This commit aims to address bytecodealliance#8607 by dynamically determining whether the pooling allocator should be used rather than unconditionally using it. It looks like some systems don't have enough virtual memory to support the default configuration settings so this should help `wasmtime serve` work on those systems. Closes bytecodealliance#8607
abrown
approved these changes
May 13, 2024
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I'm going to seek confirmation this fixes the issue before merging since I don't have a system to test on myself. |
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I can confirm that it works on the VisionFive 2 board (RISCV64) and the Nvidia Jetson Nano board. |
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Thanks for the confirmation! |
alexcrichton
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May 14, 2024
This commit is intended to address fermyon#2119 and mirror bytecodealliance/wasmtime#8610. The base problem is that some systems are configured with smaller amounts of virtual memory than other systems, for example some aarch64 and riscv64 systems are shown to have only 39 bits of virtual address space rather than the 48 by default on x86_64. This means that the pooling allocator can't be initialized on these platforms since it needs more virtual memory than that. This changes Spin to dynamically choosing whether to use the pooling allocator. It's still used by default in Wasmtime but a dynamic probe is performed to determine whether it's going to work first. While here I also added an env var to control this behavior for an escape hatch if that's needed in the future too. Closes fermyon#2119
alexcrichton
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May 14, 2024
This commit is intended to address fermyon#2119 and mirror bytecodealliance/wasmtime#8610. The base problem is that some systems are configured with smaller amounts of virtual memory than other systems, for example some aarch64 and riscv64 systems are shown to have only 39 bits of virtual address space rather than the 48 by default on x86_64. This means that the pooling allocator can't be initialized on these platforms since it needs more virtual memory than that. This changes Spin to dynamically choosing whether to use the pooling allocator. It's still used by default in Wasmtime but a dynamic probe is performed to determine whether it's going to work first. While here I also added an env var to control this behavior for an escape hatch if that's needed in the future too. Closes fermyon#2119 Signed-off-by: Alex Crichton <alex@alexcrichton.com>
calebschoepp
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May 15, 2024
This commit is intended to address fermyon#2119 and mirror bytecodealliance/wasmtime#8610. The base problem is that some systems are configured with smaller amounts of virtual memory than other systems, for example some aarch64 and riscv64 systems are shown to have only 39 bits of virtual address space rather than the 48 by default on x86_64. This means that the pooling allocator can't be initialized on these platforms since it needs more virtual memory than that. This changes Spin to dynamically choosing whether to use the pooling allocator. It's still used by default in Wasmtime but a dynamic probe is performed to determine whether it's going to work first. While here I also added an env var to control this behavior for an escape hatch if that's needed in the future too. Closes fermyon#2119 Signed-off-by: Alex Crichton <alex@alexcrichton.com>
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This commit aims to address #8607 by dynamically determining whether the pooling allocator should be used rather than unconditionally using it. It looks like some systems don't have enough virtual memory to support the default configuration settings so this should help
wasmtime servework on those systems.Closes #8607