Ian Collins i...@ianshome.com wrote:
A quick test with a C++ application I'm working with which does a lot of
string and container manipulation shows it
runs about 10% slower in 64 bit mode on AMD64 and about the same in 32
or 64 bit on a core i7. Built with -fast.
This may be a result of
On 08/19/10 08:51 PM, Joerg Schilling wrote:
Ian Collinsi...@ianshome.com wrote:
A quick test with a C++ application I'm working with which does a lot of
string and container manipulation shows it
runs about 10% slower in 64 bit mode on AMD64 and about the same in 32
or 64 bit on a core
From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-
boun...@opensolaris.org] On Behalf Of Peter Jeremy
My interpretation of those results is that you can't generalise: The
only way to determine whether your application is faster in 32-bit or
64-bit more is to test it. And your
On 19 Aug 2010, at 19:42, Garrett D'Amore wrote:
On Thu, 2010-08-19 at 21:25 +1200, Ian Collins wrote:
On 08/19/10 08:51 PM, Joerg Schilling wrote:
Ian Collinsi...@ianshome.com wrote:
A quick test with a C++ application I'm working with which does a
lot of
string and container
On Thu, 2010-08-19 at 20:14 +0100, Daniel Taylor wrote:
On 19 Aug 2010, at 19:42, Garrett D'Amore wrote:
Out of interest, what language do you recommend?
Depends on the job -- I'm a huge fan of choosing the right tool for the
job. I just think C++ tries to be jack of all trades and winds up
On 08/20/10 07:48 AM, Garrett D'Amore wrote:
On Thu, 2010-08-19 at 20:14 +0100, Daniel Taylor wrote:
On 19 Aug 2010, at 19:42, Garrett D'Amore wrote:
Out of interest, what language do you recommend?
Depends on the job -- I'm a huge fan of choosing the right tool for the
job. I just
Garrett D'Amore wrote:
On Thu, 2010-08-19 at 20:14 +0100, Daniel Taylor wrote:
On 19 Aug 2010, at 19:42, Garrett D'Amore wrote:
Out of interest, what language do you recommend?
Depends on the job -- I'm a huge fan of choosing the right tool for the
job. I just think C++ tries to be
On Thu, 19 Aug 2010, Garrett D'Amore wrote:
There are many many things to dislike about C++ -- you *can* write good
clean code in C++, but almost none of the C++ code I've seen fits that
description.
The various side effects, and unexpected memory explosion that occurs
with the favored C++
Garrett D'Amore wrote:
That is a major concern. But the problem is also that the ABIs created
by different compilers vary. You can't mix g++ and studio generated
code, for example. That's not FUD, its technical fact.
Not today, but it's my understanding this will be possible in the
On 08/20/10 08:35 AM, Garrett D'Amore wrote:
On Fri, 2010-08-20 at 03:26 +0700, C. Bergström wrote:
Ian Collins wrote:
On 08/20/10 07:48 AM, Garrett D'Amore wrote:
On Thu, 2010-08-19 at 20:14 +0100, Daniel Taylor wrote:
On 19 Aug 2010, at 19:42, Garrett D'Amore
Garrett D'Amore garr...@nexenta.com wrote:
There is no common C++ ABI. So you get into compatibility concerns
between code built with different compilers (like Studio vs. g++).
Fail.
The interesting thing is: Sun Studio on Linux is able to interoperate with g++
Jörg
--
On 08/20/10 08:30 AM, Garrett D'Amore wrote:
On Fri, 2010-08-20 at 07:58 +1200, Ian Collins wrote:
On 08/20/10 07:48 AM, Garrett D'Amore wrote:
On Thu, 2010-08-19 at 20:14 +0100, Daniel Taylor wrote:
On 19 Aug 2010, at 19:42, Garrett D'Amore wrote:
Out of interest, what
On Fri, 2010-08-20 at 09:23 +1200, Ian Collins wrote:
There is no common C++ ABI. So you get into compatibility concerns
between code built with different compilers (like Studio vs. g++).
Fail.
Which is why we have extern C. Just about any Solaris driver, library
or
On Fri, Aug 20, 2010 at 09:23:56AM +1200, Ian Collins wrote:
On 08/20/10 08:30 AM, Garrett D'Amore wrote:
There is no common C++ ABI. So you get into compatibility concerns
between code built with different compilers (like Studio vs. g++).
Fail.
Which is why we have extern C. Just about
On 08/20/10 09:26 AM, Garrett D'Amore wrote:
On Fri, 2010-08-20 at 09:23 +1200, Ian Collins wrote:
There is no common C++ ABI. So you get into compatibility concerns
between code built with different compilers (like Studio vs. g++).
Fail.
Which is why we have extern C. Just about
On 08/20/10 09:33 AM, Nicolas Williams wrote:
On Fri, Aug 20, 2010 at 09:23:56AM +1200, Ian Collins wrote:
On 08/20/10 08:30 AM, Garrett D'Amore wrote:
There is no common C++ ABI. So you get into compatibility concerns
between code built with different compilers (like Studio vs.
On Fri, Aug 20, 2010 at 09:38:51AM +1200, Ian Collins wrote:
On 08/20/10 09:33 AM, Nicolas Williams wrote:
Any driver C++ code would still need a C++ run-time. Either you must
statically link it in, or you'll have a problem with multiple drivers
using different C++ run-times. If you
On 08/20/10 09:48 AM, Nicolas Williams wrote:
On Fri, Aug 20, 2010 at 09:38:51AM +1200, Ian Collins wrote:
On 08/20/10 09:33 AM, Nicolas Williams wrote:
Any driver C++ code would still need a C++ run-time. Either you must
statically link it in, or you'll have a problem with multiple
On 08/18/10 08:40 AM, Joerg Schilling wrote:
Ian Collinsi...@ianshome.com wrote:
Some application benefit from the extended register set and function
call ABI, others suffer due to increased sizes impacting the cache.
Well, please verify your claims as they do not meet my
On 2010-Aug-18 04:40:21 +0800, Joerg Schilling
joerg.schill...@fokus.fraunhofer.de wrote:
Ian Collins i...@ianshome.com wrote:
Some application benefit from the extended register set and function
call ABI, others suffer due to increased sizes impacting the cache.
Well, please verify your
On 17.08.10 04:17, Will Murnane wrote:
On Mon, Aug 16, 2010 at 21:58, Kishore Kumar Pusukuri
kish...@cs.ucr.edu wrote:
Hi,
I am surprised with the performances of some 64-bit multi-threaded
applications on my AMD Opteron machine. For most of the applications, the
performance of 32-bit version
On 08/17/10 09:43 PM, Joerg Schilling wrote:
Garrett D'Amoregarr...@nexenta.com wrote:
It can be as simple as impact on the cache. 64-bit programs tend to be
bigger, and so they have a worse effect on the i-cache.
Unless your program does something that can inherently benefit from
From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-
boun...@opensolaris.org] On Behalf Of Will Murnane
I am surprised with the performances of some 64-bit multi-threaded
applications on my AMD Opteron machine. For most of the applications,
the performance of 32-bit version
Ian Collins i...@ianshome.com wrote:
If you have an orthogonal architecture like sparc, a typical 64 bit program
is
indeed a bit slower than the same program in 32 bit.
On Amd64, you have twice as many registers in 64 bit mode and this is the
reason for a typical performance gain of
On 08/18/10 12:05 AM, Joerg Schilling wrote:
Ian Collinsi...@ianshome.com wrote:
If you have an orthogonal architecture like sparc, a typical 64 bit program is
indeed a bit slower than the same program in 32 bit.
On Amd64, you have twice as many registers in 64 bit mode and this is the
Ian Collins i...@ianshome.com wrote:
On 08/18/10 12:05 AM, Joerg Schilling wrote:
Ian Collinsi...@ianshome.com wrote:
If you have an orthogonal architecture like sparc, a typical 64 bit
program is
indeed a bit slower than the same program in 32 bit.
On Amd64, you have twice
On 08/18/10 08:40 AM, Joerg Schilling wrote:
Ian Collinsi...@ianshome.com wrote:
On 08/18/10 12:05 AM, Joerg Schilling wrote:
Ian Collinsi...@ianshome.com wrote:
If you have an orthogonal architecture like sparc, a typical 64 bit program is
indeed a bit slower than the
Hi,
I am surprised with the performances of some 64-bit multi-threaded applications
on my AMD Opteron machine. For most of the applications, the performance of
32-bit version is almost same as the performance of 64-bit version. However,
for a couple of applications, 32-bit versions provide
It can be as simple as impact on the cache. 64-bit programs tend to be
bigger, and so they have a worse effect on the i-cache.
Unless your program does something that can inherently benefit from
64-bit registers, or can take advantage of the richer instruction set
that is available to amd64
On Mon, Aug 16, 2010 at 21:58, Kishore Kumar Pusukuri
kish...@cs.ucr.edu wrote:
Hi,
I am surprised with the performances of some 64-bit multi-threaded
applications on my AMD Opteron machine. For most of the applications, the
performance of 32-bit version is almost same as the performance of
30 matches
Mail list logo
