In article <Pine.LNX.4.61.0411091959570.7243@filer.marasystems.com> (at Tue, 9 Nov 2004 20:03:04 +0100 (CET)), Henrik Nordstrom <hno@marasystems.com> says: > 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. There's no such users, AFAIK. David, I'll do some test. Thanks. --yoshfuji - : 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
