Re: Fedora SMP and 12 core cpu's

2010-10-08 Thread Bill Davidsen
JD wrote: > > > On 09/30/2010 10:12 AM, Tom Horsley wrote: >> On Thu, 30 Sep 2010 09:59:38 -0700 >> JD wrote: >> >>> What I would like to know is the degree of granularity >>> of the SMP implementation in Linux. >> Don't know what granularity means :-), but we have run kernel.org >> kernels on up t

Re: Fedora SMP and 12 core cpu's

2010-10-02 Thread JD
On 10/02/2010 11:30 AM, Gilboa Davara wrote: > On Sat, 2010-10-02 at 11:18 -0700, JD wrote: >> Not to be mean or anythingSo please take it lightly: >> Did I say linux has issues in supporting large smp? NO! >> You are answering your own question. not mine. > ... > >> Did I say anything about

Re: Fedora SMP and 12 core cpu's

2010-10-02 Thread JD
On 10/02/2010 02:41 PM, Alan Cox wrote: > To be honest your bigger problem is finding enough application > parallelism and enough parallel user space apps. That and memory or I/O > bandwidth on servers. > > The kernel will run on supercomputers with over 1000 processors. Not all > workloads are h

Re: Fedora SMP and 12 core cpu's

2010-10-02 Thread JD
On 10/02/2010 01:05 PM, Samuel Kidman wrote: > > > On Sun, Oct 3, 2010 at 3:49 AM, Yorvyk > wrote: > > On Sat, 02 Oct 2010 19:54:27 +0200 > Gilboa Davara mailto:gilb...@gmail.com>> wrote: > > > On Thu, 2010-09-30 at 09:59 -0700, JD wrote: > >

Re: Fedora SMP and 12 core cpu's (OT)

2010-10-02 Thread Gilboa Davara
On Sat, 2010-10-02 at 20:49 +0100, Yorvyk wrote: > On Sat, 02 Oct 2010 19:54:27 +0200 > Gilboa Davara wrote: > > > On Thu, 2010-09-30 at 09:59 -0700, JD wrote: > > > I was browsing for info on 12 core cpu's and found > > > that AMD released them or announced back in March. > > > The price is stee

Re: Fedora SMP and 12 core cpu's

2010-10-02 Thread Alan Cox
To be honest your bigger problem is finding enough application parallelism and enough parallel user space apps. That and memory or I/O bandwidth on servers. The kernel will run on supercomputers with over 1000 processors. Not all workloads are handled well at that scale so if you threw 1000 random

Re: Fedora SMP and 12 core cpu's

2010-10-02 Thread Samuel Kidman
On Sun, Oct 3, 2010 at 3:49 AM, Yorvyk wrote: > On Sat, 02 Oct 2010 19:54:27 +0200 > Gilboa Davara wrote: > > > On Thu, 2010-09-30 at 09:59 -0700, JD wrote: > > > I was browsing for info on 12 core cpu's and found > > > that AMD released them or announced back in March. > > > The price is steep

Re: Fedora SMP and 12 core cpu's

2010-10-02 Thread Yorvyk
On Sat, 02 Oct 2010 19:54:27 +0200 Gilboa Davara wrote: > On Thu, 2010-09-30 at 09:59 -0700, JD wrote: > > I was browsing for info on 12 core cpu's and found > > that AMD released them or announced back in March. > > The price is steep of course. > > What I would like to know is the degree of gra

Re: Fedora SMP and 12 core cpu's

2010-10-02 Thread Gilboa Davara
On Sat, 2010-10-02 at 11:18 -0700, JD wrote: > > Not to be mean or anythingSo please take it lightly: > Did I say linux has issues in supporting large smp? NO! > You are answering your own question. not mine. ... > Did I say anything about application support? No! > Again, you are answering

Re: Fedora SMP and 12 core cpu's

2010-10-02 Thread JD
On 10/02/2010 11:11 AM, Samuel Kidman wrote: > > > On Fri, Oct 1, 2010 at 12:59 AM, JD > wrote: > > I was browsing for info on 12 core cpu's and found > that AMD released them or announced back in March. > The price is steep of course. > What I would lik

Re: Fedora SMP and 12 core cpu's

2010-10-02 Thread JD
On 10/02/2010 11:09 AM, Gilboa Davara wrote: > On Thu, 2010-09-30 at 10:26 -0700, JD wrote: > >> Granularity applies to the locking scheme in the kernel. >> It is how the kernel must prevent different cors/cpus from >> clobberig the same kernel global data at the same time. >> >> Some locking sch

Re: Fedora SMP and 12 core cpu's

2010-10-02 Thread JD
On 10/02/2010 10:54 AM, Gilboa Davara wrote: > On Thu, 2010-09-30 at 09:59 -0700, JD wrote: >> I was browsing for info on 12 core cpu's and found >> that AMD released them or announced back in March. >> The price is steep of course. >> What I would like to know is the degree of granularity >> of

Re: Fedora SMP and 12 core cpu's

2010-10-02 Thread Samuel Kidman
On Fri, Oct 1, 2010 at 12:59 AM, JD wrote: > I was browsing for info on 12 core cpu's and found > that AMD released them or announced back in March. > The price is steep of course. > What I would like to know is the degree of granularity > of the SMP implementation in Linux. > Does anyone have a

Re: Fedora SMP and 12 core cpu's

2010-10-02 Thread Gilboa Davara
On Thu, 2010-09-30 at 10:26 -0700, JD wrote: > Granularity applies to the locking scheme in the kernel. > It is how the kernel must prevent different cors/cpus from > clobberig the same kernel global data at the same time. > > Some locking schemes are coarser than others. There is > an optimal po

Re: Fedora SMP and 12 core cpu's

2010-10-02 Thread Gilboa Davara
On Thu, 2010-09-30 at 09:59 -0700, JD wrote: > I was browsing for info on 12 core cpu's and found > that AMD released them or announced back in March. > The price is steep of course. > What I would like to know is the degree of granularity > of the SMP implementation in Linux. > Does anyone have an

Re: Fedora SMP and 12 core cpu's

2010-09-30 Thread JD
On 09/30/2010 10:12 AM, Tom Horsley wrote: > On Thu, 30 Sep 2010 09:59:38 -0700 > JD wrote: > >> What I would like to know is the degree of granularity >> of the SMP implementation in Linux. > Don't know what granularity means :-), but we have run kernel.org > kernels on up to 64 core machines he

Re: Fedora SMP and 12 core cpu's

2010-09-30 Thread Tom Horsley
On Thu, 30 Sep 2010 09:59:38 -0700 JD wrote: > What I would like to know is the degree of granularity > of the SMP implementation in Linux. Don't know what granularity means :-), but we have run kernel.org kernels on up to 64 core machines here at work. -- users mailing list users@lists.fedorapr