On Tue, 9 Nov 2004, Craig, Dave wrote:
Please consider the attached patch for incorporation into the next Linux 2.6 release. I found that using the __builtin_memcmp GCC intrinsic for doing IPv6 address comparison a lot more slow than integer comparison. In significant SCTP workloads I found address comparison taking roughly 10% of the CPU time. After changing the address comparison to an integer-based approach the comparison consumed 5% of the CPU time.
One small comment about your patch: It changes the semantics of ipv6_addr_cmp() from returning sort order A <=> B to boolean A != B. This may be fine, but not if there is users of ipv6_addr_cmp() expecting the sort order property.
Regards Henrik - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
