On Do, 2014-12-04 at 23:56 +0800, Herbert Xu wrote: > On Thu, Dec 04, 2014 at 02:08:50PM +0100, Hannes Frederic Sowa wrote: > > By default the arch_fast_hash hashing function pointers are initialized > > to jhash(2). If during boot-up a CPU with SSE4.2 is detected they get > > updated to the CRC32 ones. This dispatching scheme incurs a function > > pointer lookup and indirect call for every hashing operation. > > Just curious, is jhash actually faster than generic C CRC32 on > common platforms?
Yes, jhash always beats crc32 in software on x86_64 and ia32. Bye, Hannes -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
