38 lines
956 B
Markdown
38 lines
956 B
Markdown
# Default `max-threads`
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The default `max-threads` uses a simple algorithm to get how many threads.
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```rs
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if total_threads >= 32 {
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return total_threads - 4;
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} else if total_threads >= 12 {
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return total_threads - 2;
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} else if total_threads >= 3 {
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return total_threads - 1;
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} else {
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return total_threads;
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}
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```
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i.e. with `total_threads` as the number of threads the CPU(s) has:
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- If the CPU has 32 or more threads, it will use all but 4 threads
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- If the CPU has 12 or more threads, it will use all but 2 threads
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- If the CPU has 3 or more threads, it will use all but 1 thread
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- Otherwise, i.e. if the CPU has 1 to 2 threads, it will use all threads
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---
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Alternative algorithms I tried:
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```rs
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if total_threads >= 32 {
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return total_threads - total_threads.div_ceil(10);
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} else if total_threads >= 12 {
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return total_threads - 2;
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} else if total_threads >= 3 {
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return total_threads - 1;
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} else {
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return total_threads;
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}
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```
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