> > Your MPI (and OpenMP) should do this for you.
>
> Although not always correctly, it may assume that it can
> allocate from core 0 onwards leading to odd performance
> issues if you happen to get two 4 CPU jobs running on the
> same node..
Most clusters I've seen aren't used that way (whole no
- "Greg Lindahl" <[EMAIL PROTECTED]> wrote:
> > 3) Is there some reason to use things like
> > mpirun -np N /usr/bin/numactl my_application
> ?
>
> Your MPI (and OpenMP) should do this for you.
Although not always correctly, it may assume that it can
allocate from core 0 onwards leading
On Jun 23, 2008, at 9:12 PM, Mark Hahn wrote:
"how sure are we that a process (or thread) that allocated and
initialized and writes to memory at a single specific memory node,
also keeps getting scheduled at a core on that memory node?"
numactl --cpubind=0 --membind=0
It seems to me that s
> 3) Is there some reason to use things like
> mpirun -np N /usr/bin/numactl my_application ?
Your MPI (and OpenMP) should do this for you.
-- greg
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Not really,
The architecture of AMD versus Nvidia is quite different. I would
encourage each manufacturer to have their own system.
So to speak AMD is a low clocked core2 supercomputer @ 64 cores,
versus nvidia a 240 processor mips supercomputer.
I feel the real limitation is that the achi
Greg,
I agree that SuperComputing is a great place to go to catch up on the
latest technology. And yes, here at Georgetown University (not be
confused with our neighbor George Washington University) we offer HPC
training courses (www.gridswatch.com, Training). We have taught a fair
number of
"how sure are we that a process (or thread) that allocated and initialized
and writes to memory at a single specific memory node,
also keeps getting scheduled at a core on that memory node?"
numactl --cpubind=0 --membind=0
It seems to me that sometimes (like every second or so) threads jump fr
In message from Vincent Diepeveen <[EMAIL PROTECTED]> (Mon, 23 Jun 2008
18:41:21 +0200):
I would add to this:
"how sure are we that a process (or thread) that allocated and
initialized and writes to memory at a single specific memory node,
also keeps getting scheduled at a core on that memory
RGB,
(re kicking) Sure, and you won't miss. Basically, you lift your foot up and
place it on my chest, with your knee bent. I bend my knees. We say "one two
three go!" and you push with your leg while I jump backwards. If people
practice doing that *quickly* it looks kinda like you are kicking me t
On Thu, 19 Jun 2008, John Hearns wrote:
One thing I've never understood, and hopefully someone on here can
explain clearly, is why the onboard graphics is normally disabled
when you add a PCI-e card.
Conflict of resources like I/O ports to emulate old VGA (or earlier)
comes to mind.
--
Bog
On Wed, 18 Jun 2008, Prentice Bisbal wrote:
There is value, however, if your goal is to recover (discover?) an
MD5-hashed password through a brute-force attack. Last time I
checked, MD5 password s are the default for most Linux distros.
The above paragraph can be misleading: while Linux distr
I would add to this:
"how sure are we that a process (or thread) that allocated and
initialized and writes to memory at a single specific memory node,
also keeps getting scheduled at a core on that memory node?"
It seems to me that sometimes (like every second or so) threads jump
from 1 mem
On Wed, 18 Jun 2008, Prentice Bisbal wrote:
The biggest hindrance to doing "real" work with GPUs is the lack of
dual-precision capabilities.
I think that the biggest hindrance is a unified API or language for
all these accelerators (taking into account not only the GPUs !). Many
developers a
The questions are
1) Is there some way to distribute analogously the local memory of threads (I
assume that it have the same size for each thread) using "reasonable" NUMA
allocation ?
that is, not surprisingly, the default. generally, on all NUMA machines,
the starting rule is that memory is
I'm testing my 1st dual-socket quad-core Opteron 2350-based server.
Let me assume that the RAM used by kernel and system processes is
zero, there is no physical RAM fragmentation, and the affinity of
processes to CPU cores is maintained. I assume also that both the
nodes are populated w/equal n
On 22 Jun 2008, at 1:21 am, Perry E. Metzger wrote:
$10-$50 a user is cheap compared to the salaries of even university
sysadmins multiplied over all the hours of trouble that breakins
cause. As I said, there are competitors that are cheaper -- if you
really need a $5 solution, they exist. If y
On Sun, 2008-06-22 at 08:33 -0400, Robert G. Brown wrote:
> There is a whole literature on this -- apocalyptic and post-apocalyptic
> views of nuclear war. On The Beach. Five Signs from Ruby. A Boy and
> his Dog. Damnation Alley. Mad Max. Daybreak, 2024. The Day After.
> One of my favorites
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