llama-bench : fix unexpected global variable initialize sequence issue #11832
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slaren
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Feb 14, 2025
slaren
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Feb 14, 2025
orca-zhang
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Feb 26, 2025
ggml-org#11832) * llama-bench : fix unexpected global variable initialize sequence issue * Update examples/llama-bench/llama-bench.cpp --------- Co-authored-by: Diego Devesa <[email protected]>
arthw
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Feb 26, 2025
ggml-org#11832) * llama-bench : fix unexpected global variable initialize sequence issue * Update examples/llama-bench/llama-bench.cpp --------- Co-authored-by: Diego Devesa <[email protected]>
mglambda
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ggml-org#11832) * llama-bench : fix unexpected global variable initialize sequence issue * Update examples/llama-bench/llama-bench.cpp --------- Co-authored-by: Diego Devesa <[email protected]>
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Global variable initialize sequence is undefined across multiple components, and could introduce unexpected behaviors.
In my case, llama-bench is completely broken with my MSVC compiler.
In short, the initialize sequence of these two global variable causes the problem:
const std::string test::cpu_info = get_cpu_info();andstatic vk_instance_t vk_instance;Here's the detailed calling sequence:
1.Firstly,
const std::string test::cpu_info = get_cpu_info();getting initialized, and get_cpu_info() uses the uninitialized global variablestatic vk_instance_t vk_instance;unexpectedly:vk_instance.instance = vk::createInstance(instance_create_info);2.Then
static vk_instance_t vk_instance;getting initialized, and zeroed out the previous filled vk_instance.instance, and causing all the following calling sequence failed.