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borrow cache prefetching tricks from the Marvell port, seem to improve performance by 5-28%

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Konstantinos Margaritis
2021-01-15 17:42:11 +02:00
committed by Konstantinos Margaritis
parent 700a0a093c
commit e830470028
4 changed files with 37 additions and 7 deletions
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10
src/nfa/mcsheng.c
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@@ -889,6 +889,11 @@ char nfaExecMcSheng16_Q2i(const struct NFA *n, u64a offset, const u8 *buffer,
return MO_ALIVE;
}
__builtin_prefetch(&m->remap[0]);
__builtin_prefetch(&m->remap[64]);
__builtin_prefetch(&m->remap[128]);
__builtin_prefetch(&m->remap[192]);
while (1) {
assert(q->cur < q->end);
s64a ep = q->items[q->cur].location;
@@ -1017,6 +1022,11 @@ char nfaExecMcSheng8_Q2i(const struct NFA *n, u64a offset, const u8 *buffer,
return MO_ALIVE;
}
__builtin_prefetch(&m->remap[0]);
__builtin_prefetch(&m->remap[64]);
__builtin_prefetch(&m->remap[128]);
__builtin_prefetch(&m->remap[192]);
while (1) {
DEBUG_PRINTF("%s @ %llu\n", q->items[q->cur].type == MQE_TOP ? "TOP" :
q->items[q->cur].type == MQE_END ? "END" : "???",