Alan Cox wrote:
>> Also, the ABI is much better, and this may be almost as significant.
>>
>>> Unfortunately that biggest gain only occurs if the program logic is such
>>> that
>>> registers run out often.
>>
>> Which, in the case of gcc-generated code, is most of the time. gcc
>> was originally
> Also, the ABI is much better, and this may be almost as significant.
>
> > Unfortunately that biggest gain only occurs if the program logic is such
> > that
> > registers run out often.
>
> Which, in the case of gcc-generated code, is most of the time. gcc
> was originally written for, and s
25.05.2011, 21:13, "Andrew Haley" :
> On 05/25/2011 12:58 PM, Bill Davidsen wrote:
>
>> Chris Adams wrote:
>>> Once upon a time, Fernando Cassia; said:
Well guess what? 64 bit code is bigger (bigger pointers) and thus
slower, because CPU cache is less effective, with bigger code.
>>>
On 05/25/2011 12:58 PM, Bill Davidsen wrote:
> Chris Adams wrote:
>> Once upon a time, Fernando Cassia said:
>>> Well guess what? 64 bit code is bigger (bigger pointers) and thus
>>> slower, because CPU cache is less effective, with bigger code.
>>
>> All other things being equal, that might be tr
Chris Adams wrote:
> Once upon a time, Fernando Cassia said:
>> Well guess what? 64 bit code is bigger (bigger pointers) and thus
>> slower, because CPU cache is less effective, with bigger code.
>
> All other things being equal, that might be true. However, all other
> things are NOT equal; poin
On Tue, May 24, 2011 at 20:16, Fernando Cassia wrote:
> My take is that multiple 32-bit JVMs each in its own 4GB address space
on top of a 64-bit OS.
^^
(sorry, I missed that line :)
> probably would run faster than the equivalent 64-bit JVMs on 64-bit
> OS.
FC
--
users ma
On Tue, May 24, 2011 at 20:14, Nat Gross wrote:
> 32 bit jvm inside 64 bit os works fine. The question is which
> combination of os & jvm is best.
My take is that multiple 32-bit JVMs each in its own 4GB address space
probably would run faster than the equivalent 64-bit JVMs on 64-bit
OS.
But th
On Tue, May 24, 2011 at 5:51 PM, Fernando Cassia wrote:
> On Tue, May 24, 2011 at 18:07, Jerry Feldman wrote:
>> My statement is:
>> 64-bit operating systems on X86-64 are faster than the same OS in 32-bits.
>
> How abonut a 32-bit JVM inside a 64-bit OS? Is that even possible?
> (just thinking a
On Tue, May 24, 2011 at 4:44 PM, Fernando Cassia wrote:
> On Tue, May 24, 2011 at 17:40, Jerry Feldman wrote:
>> The bottom line here is you can't make a blanket statement
>> that 64-bit code is slower. And if you have a decent optimizing
>> compiler, your performance could improve.
>
> I don´t m
On Tue, May 24, 2011 at 18:07, Jerry Feldman wrote:
> My statement is:
> 64-bit operating systems on X86-64 are faster than the same OS in 32-bits.
How abonut a 32-bit JVM inside a 64-bit OS? Is that even possible?
(just thinking aloud).
FC
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To
On 05/24/2011 04:44 PM, Fernando Cassia wrote:
> On Tue, May 24, 2011 at 17:40, Jerry Feldman wrote:
>> The bottom line here is you can't make a blanket statement
>> that 64-bit code is slower. And if you have a decent optimizing
>> compiler, your performance could improve.
> I don´t make any blan
On Tue, May 24, 2011 at 17:40, Jerry Feldman wrote:
> The bottom line here is you can't make a blanket statement
> that 64-bit code is slower. And if you have a decent optimizing
> compiler, your performance could improve.
I don´t make any blanket statement. Sun/Oracle´s FAQ does say there´s
a 0-
On 05/24/2011 12:37 PM, Fernando Cassia wrote:
> Well guess what? 64 bit code is bigger (bigger pointers) and thus
> slower, because CPU cache is less effective, with bigger code.
>
In my previous job I've done quite a bit of benchmarking. First, the OS
itself is faster in 64-bit because it can use
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Hash: SHA1
On 05/24/2011 07:44 PM, Jon Ingason wrote:
> 2011-05-24 19:11, harleq...@googlemail.com skrev:
>>
>>
>> Rahul Sundaram schrieb:
>>
>> On 05/24/2011 08:33 PM, Nat Gross wrote: > 1. Thank you ALL for the
>> quick positive response! > > 2. I am a
2011-05-24 19:11, harleq...@googlemail.com skrev:
>
>
> Rahul Sundaram schrieb:
>
> On 05/24/2011 08:33 PM, Nat Gross wrote: > 1. Thank you ALL for the
> quick positive response! > > 2. I am a bit confused as to when to
> use 32 bit components on a 64 bit > os. Besides Flash, Java has
Once upon a time, Fernando Cassia said:
> Well guess what? 64 bit code is bigger (bigger pointers) and thus
> slower, because CPU cache is less effective, with bigger code.
All other things being equal, that might be true. However, all other
things are NOT equal; pointer size is not the only dif
Rahul Sundaram schrieb:
On 05/24/2011 08:33 PM, Nat Gross wrote: > 1. Thank you ALL for the quick
positive response! > > 2. I am a bit confused as to when to use 32 bit
components on a 64 bit > os. Besides Flash, Java has the same option, and many
more. On the 64 > bit architecture, would I
On 05/24/2011 05:57 PM, Fernando Cassia wrote:
> On Tue, May 24, 2011 at 13:47, Andrew Haley wrote:
>> Ever since
>> Compressed OOPs became the default there's no big advantage to running
>> 32-bit Java, at least on HotSpot.
>
>
> What are the performance characteristics of 64-bit versus 32-
On Tue, May 24, 2011 at 13:47, Andrew Haley wrote:
> Ever since
> Compressed OOPs became the default there's no big advantage to running
> 32-bit Java, at least on HotSpot.
What are the performance characteristics of 64-bit versus 32-bit VMs?
Generally, the benefits of being able to address
On 05/24/2011 05:37 PM, Fernando Cassia wrote:
> On Tue, May 24, 2011 at 11:49, Nat Gross wrote:
>> So, the question is. Is it still advisable to go 32 bit due to
>> stability (say Flash), or can I gain performance and have 99%
>> stability with 64 bit F 15?
>
> Well guess what? 64 bit code is bi
On Tue, May 24, 2011 at 11:49, Nat Gross wrote:
> So, the question is. Is it still advisable to go 32 bit due to
> stability (say Flash), or can I gain performance and have 99%
> stability with 64 bit F 15?
>
Well guess what? 64 bit code is bigger (bigger pointers) and thus
slower, because CPU ca
On Tue, 2011-05-24 at 11:27 -0400, Bill Davidsen wrote:
> Rahul Sundaram wrote:
> > On 05/24/2011 08:19 PM, Nat Gross wrote:
> >> Planning to install Fedora 15 on a new partition dual boot win 7.
> >> Hardware AMD 1090 (6 core) with 8 gig ram.
> >> Doing Java programming and plan to use KVM machine
2011/5/24 Rahul Sundaram
> On 05/24/2011 08:57 PM, Bill Davidsen wrote:
> > What? Are you saying that KVM support is out of the PAE 32bit kernel?
> Because
> > libvirt, virt-manager, etc, are definitely shown as available packages.
> As far
> > as limitations and performance go, unless you have a
On 05/24/2011 08:57 PM, Bill Davidsen wrote:
> What? Are you saying that KVM support is out of the PAE 32bit kernel? Because
> libvirt, virt-manager, etc, are definitely shown as available packages. As
> far
> as limitations and performance go, unless you have applications which push
> the
> 4
Rahul Sundaram wrote:
> On 05/24/2011 08:19 PM, Nat Gross wrote:
>> Planning to install Fedora 15 on a new partition dual boot win 7.
>> Hardware AMD 1090 (6 core) with 8 gig ram.
>> Doing Java programming and plan to use KVM machines with Fedora as the host
>> os.
>> Of course regular stuff on th
On 05/24/2011 08:33 PM, Nat Gross wrote:
> 1. Thank you ALL for the quick positive response!
>
> 2. I am a bit confused as to when to use 32 bit components on a 64 bit
> os. Besides Flash, Java has the same option, and many more. On the 64
> bit architecture, would I use 64 bit Java as well?
Yes.
On Tue, May 24, 2011 at 10:59 AM, Patrick O'Callaghan
wrote:
> On Tue, 2011-05-24 at 10:49 -0400, Nat Gross wrote:
>> Planning to install Fedora 15 on a new partition dual boot win 7.
>> Hardware AMD 1090 (6 core) with 8 gig ram.
>> Doing Java programming and plan to use KVM machines with Fedora a
1. Thank you ALL for the quick positive response!
2. I am a bit confused as to when to use 32 bit components on a 64 bit
os. Besides Flash, Java has the same option, and many more. On the 64
bit architecture, would I use 64 bit Java as well?
Thanks again.
--
users mailing list
users@lists.fedor
On Tue, 2011-05-24 at 10:49 -0400, Nat Gross wrote:
> Planning to install Fedora 15 on a new partition dual boot win 7.
> Hardware AMD 1090 (6 core) with 8 gig ram.
> Doing Java programming and plan to use KVM machines with Fedora as the host
> os.
> Of course regular stuff on the web including vi
On Tue, May 24, 2011 at 9:49 AM, Nat Gross wrote:
> Planning to install Fedora 15 on a new partition dual boot win 7.
> Hardware AMD 1090 (6 core) with 8 gig ram.
> Doing Java programming and plan to use KVM machines with Fedora as the host
> os.
> Of course regular stuff on the web including vid
age
>From: Nat Gross
>To: fedora-l...@redhat.com
>Sent: Ter, Mai 24, 2011, 11:50 AM
>Subject: F 15. 64 bit versus 32 bit.
>
>Planning to install Fedora 15 on a new partition dual boot win 7.
>Hardware AMD 1090 (6 core) with 8 gig ram.
>Doing Java programming and pl
On 05/24/2011 03:51 PM, Rahul Sundaram wrote:
> On 05/24/2011 08:19 PM, Nat Gross wrote:
>> Planning to install Fedora 15 on a new partition dual boot win 7.
>> Hardware AMD 1090 (6 core) with 8 gig ram.
>> Doing Java programming and plan to use KVM machines with Fedora as the host
>> os.
>> Of co
On Tue, 24 May 2011 10:49:40 -0400
Nat Gross wrote:
> Planning to install Fedora 15 on a new partition dual boot win 7.
> Hardware AMD 1090 (6 core) with 8 gig ram.
> Doing Java programming and plan to use KVM machines with Fedora as the host
> os.
> Of course regular stuff on the web including
On 05/24/2011 08:19 PM, Nat Gross wrote:
> Planning to install Fedora 15 on a new partition dual boot win 7.
> Hardware AMD 1090 (6 core) with 8 gig ram.
> Doing Java programming and plan to use KVM machines with Fedora as the host
> os.
> Of course regular stuff on the web including videos, etc.
Planning to install Fedora 15 on a new partition dual boot win 7.
Hardware AMD 1090 (6 core) with 8 gig ram.
Doing Java programming and plan to use KVM machines with Fedora as the host os.
Of course regular stuff on the web including videos, etc.
So, the question is. Is it still advisable to go 32
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