Add get_mempolicy, set_mempolicy NUMA syscalls#193
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Calling get_mempolicy() will return an object with "mode" and "mask" keys, corresponding to the two output arguments of the get_mempolicy function. The mask is implemented along the lines of cpu_set, except that it can hold any number of bits, defaulting to the size of a long. set_mempolicy(mode, mask) imposes a mode and possibly a mask as well.
| local ulong_bit_count = ffi.sizeof('unsigned long') * 8 | ||
| local function ulong_index_and_bit(n) | ||
| local i = math.floor(n / ulong_bit_count) | ||
| local b = bit.lshift(1ULL, n - i * ulong_bit_count) |
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The CI is objecting to the 1ULL in bit.lshift
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I think that may be luajit 2.1 vs 2.0 issue, about 64 bit bitops. Would be nice to work around...
Owner
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There are a few CI issues. For automated tests you should be able to at least call |
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Tx for the feedback, will poke. |
Owner
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Would be nice to fix the CI issues... |
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tx for the ping, will poke |
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Author
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Related: snabbco/snabb#1200 I should get back on this upstreaming horse! |
Owner
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Yes I think https://github.com/snabbco/snabb/pull/1268/files is needed... |
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Calling get_mempolicy() will return an object with "mode" and "mask"
keys, corresponding to the two output arguments of the get_mempolicy
function. The mask is implemented along the lines of cpu_set, except
that it can hold any number of bits, defaulting to the size of a long.
set_mempolicy(mode, mask) imposes a mode and possibly a mask as well.
I have tested this in Snabb and interactively but I would appreciate suggestions on what automated tests would be required.