There are no floating points operations in zfs, however even if there would that wouldn't be a bad thing, as modern CPU are float monsters indeed its likely some things would be faster if converted to use the float ALU (note however those operations would have to account for the different properties of the ALUs).
The most complex ALU parts of zfs are the Galois field math in the RAID codes and the checksum operations. All of which are integer ops (tho it might be interesting to see if the Galois field could be accelerated using the float ALU). Deano -----Original Message----- From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-boun...@opensolaris.org] On Behalf Of Jerry Kemp Sent: 22 December 2010 19:44 To: zfs-discuss@opensolaris.org Subject: [zfs-discuss] stupid ZFS question - floating point operations I have a coworker, who's primary expertise is in another flavor of Unix. This coworker lists floating point operations as one of ZFS detriments. I's not really sure what he means specifically, or where he got this reference from. In an effort to refute what I believe is an error or misunderstanding on his part, I have spent time on Yahoo, Google, the ZFS section of OpenSolaris.org, etc. I really haven't turned up much of anything that would prove or disprove his comments. The one thing I haven't done is to go through the ZFS source code, but its been years since I have done any serious programming. If someone from Oracle, or anyone on this mailing list could point me towards any documentation, or give me a definitive word, I would sure appreciate it. If there were floating point operations going on within ZFS, at this point I am uncertain as to what they would be. TIA for any comments, Jerry _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
