]
Sent: Thu 12/23/2010 1:32 AM
To: Garrett D'Amore
Cc: Erik Trimble; Jerry Kemp; zfs-discuss@opensolaris.org
Subject: Re: [zfs-discuss] stupid ZFS question - floating point operations
On 22/12/2010 20:27, Garrett D'Amore wrote:
That said, some operations -- and cryptographic ones in particular
On 22/12/2010 20:27, Garrett D'Amore wrote:
That said, some operations -- and cryptographic ones in particular --
may use floating point registers and operations because for some
architectures (sun4u rings a bell) this can make certain expensive
Well remembered! There are sun4u optimisations
Darren J Moffat darren.mof...@oracle.com wrote:
On 22/12/2010 20:27, Garrett D'Amore wrote:
That said, some operations -- and cryptographic ones in particular --
may use floating point registers and operations because for some
architectures (sun4u rings a bell) this can make certain
On Thu, Dec 23, 2010 at 09:32:13AM +, Darren J Moffat wrote:
On 22/12/2010 20:27, Garrett D'Amore wrote:
That said, some operations -- and cryptographic ones in particular --
may use floating point registers and operations because for some
architectures (sun4u rings a bell) this can make
On 23/12/2010 15:18, Garrett D'Amore wrote:
Thanks for the clarification. I guess I need to go back and figure out
how ZFS crypto keying is performed. I guess most likely the key is
generated from some sort of one-way hash from a passphrase?
See
On 23/12/2010 17:09, joerg.schill...@fokus.fraunhofer.de wrote:
Darren J Moffatdarren.mof...@oracle.com wrote:
On 22/12/2010 20:27, Garrett D'Amore wrote:
That said, some operations -- and cryptographic ones in particular --
may use floating point registers and operations because for some
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
On 22 December, 2010 - Jerry Kemp sent me these 1,0K bytes:
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.
On 12/23/10 08:44 AM, Jerry Kemp wrote:
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.
It sounds like your
On 22/12/10 2:44 PM, Jerry Kemp wrote:
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.
Perhaps he can point you also to the equally mythical competing
filesystem which offers ZFS' advantages.
If I remember correctly Solaris like most other operating system does not save
or restore the floating point registers when context switching from User to
Kernel so doing any floating point ops in the kernel would corrupt user
floating point state. This means ZFS cannot be doing any floating
On 12/22/2010 11:49 AM, Tomas Ögren wrote:
On 22 December, 2010 - Jerry Kemp sent me these 1,0K bytes:
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
-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
and probably are not performed at all
for x86 cpus.
- Garrett
-Original Message-
From: zfs-discuss-boun...@opensolaris.org on behalf of Erik Trimble
Sent: Wed 12/22/2010 12:08 PM
To: Jerry Kemp; zfs-discuss@opensolaris.org
Subject: Re: [zfs-discuss] stupid ZFS question - floating point
On 2010-Dec-23 04:48:19 +0800, Deano de...@rattie.demon.co.uk wrote:
modern CPU are float monsters indeed its
likely some things would be faster if converted to use the float ALU
_Some_ modern CPUs are good at FP, a lot aren't. The SPARC T-1 was
particularly poor as it only had a single FPU.
-Original Message-
From: Peter Jeremy [mailto:peter.jer...@alcatel-lucent.com]
Sent: 22 December 2010 21:17
To: Deano
Cc: zfs-discuss@opensolaris.org
Subject: Re: [zfs-discuss] stupid ZFS question - floating point operations
On 2010-Dec-23 04:48:19 +0800, Deano de...@rattie.demon.co.uk
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