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ofp-actions: Waste less memory in learn actions.

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Make the immediate data member 'src_imm' of a learn spec allocated at
the end of the action for just the right size.  This, together with
some structure packing saves on average of ~128 bytes for each learn
spec in each learn action.  Typical learn actions have about 4 specs
each, so this amounts to saving about 0.5kb for each learn action.

Signed-off-by: Jarno Rajahalme <jarno@ovn.org>
Acked-by: Ben Pfaff <blp@ovn.org>
This commit is contained in:
Jarno Rajahalme
2016-08-31 08:43:48 -07:00
parent 47bf118665
commit dfe191d5fa
5 changed files with 114 additions and 54 deletions
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14
lib/meta-flow.c
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@@ -2535,6 +2535,20 @@ mf_write_subfield(const struct mf_subfield *sf, const union mf_subvalue *x,
mf_set(field, &value, &mask, match, NULL);
}
void
mf_write_subfield_value(const struct mf_subfield *sf, const void *src,
struct match *match)
{
const struct mf_field *field = sf->field;
union mf_value value, mask;
unsigned int size = DIV_ROUND_UP(sf->n_bits, 8);
mf_get(field, match, &value, &mask);
bitwise_copy(src, size, 0, &value, field->n_bytes, sf->ofs, sf->n_bits);
bitwise_one ( &mask, field->n_bytes, sf->ofs, sf->n_bits);
mf_set(field, &value, &mask, match, NULL);
}
/* 'v' and 'm' correspond to values of 'field'. This function copies them into
* 'match' in the correspond positions. */
void