On Tue, Aug 31, 2010 at 12:55 PM, Yeb Havinga wrote:
> Scott Marlowe wrote:
>>
>> On Tue, Aug 31, 2010 at 6:41 AM, Yeb Havinga wrote:
>>
export OMP_NUM_THREADS=4
>>>
>>> Then I get the following. The rather wierd dip at 5 threads is consistent
>>> over multiple tries:
>>>
>>>
>>
>>
Scott Marlowe wrote:
On Tue, Aug 31, 2010 at 6:41 AM, Yeb Havinga wrote:
export OMP_NUM_THREADS=4
Then I get the following. The rather wierd dip at 5 threads is consistent
over multiple tries:
I get similar dips on my server. Especially as you make the stream
test write a la
Jose Ildefonso Camargo Tolosa wrote:
your i860? http://en.wikipedia.org/wiki/Intel_i860 wow!. :D
That's supposed to be i7-860:
http://en.wikipedia.org/wiki/List_of_Intel_Core_i7_microprocessors
It was a whole $199, so not an expensive processor.
Now, seriously: what memory (brand/mode
And, I have zone reclaim set to off because it makes the linux kernel
on large cpu machines make pathologically unsound decisions during
large file transfers.
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Note that in that graph, the odd dips are happening every 8 cores on a
system with 4 12 core processors. I don't know why, I would expect it
to be every 6 or something.
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Hi!
On Tue, Aug 31, 2010 at 11:13 AM, Greg Smith wrote:
> Yeb Havinga wrote:
>>
>> The rather wierd dip at 5 threads is consistent over multiple tries
>
> I've seen that twice on 4 core systems now. The spot where there's just one
> more thread than cores seems to be the worst case for cache thr
Jose Ildefonso Camargo Tolosa wrote:
Ok, this could explain the huge difference. I was planing on getting
GigaByte GA-890GPA-UD3H, with a Phenom II X6 and that ram: Crucial
CT2KIT25664BA1339, Crucial BL2KIT25664FN1608, or something better I
find when I get enough money (depending on my budget a
Hi!
On Tue, Aug 31, 2010 at 8:11 AM, Yeb Havinga wrote:
> Greg Smith wrote:
>>
>> Yeb Havinga wrote:
>>>
>>> model name : AMD Phenom(tm) II X4 940 Processor @ 3.00GHz
>>> cpu cores : 4
>>> stream compiled with -O3
>>> Function Rate (MB/s) Avg time Min time Max time
>>>
Yeb Havinga wrote:
The rather wierd dip at 5 threads is consistent over multiple tries
I've seen that twice on 4 core systems now. The spot where there's just
one more thread than cores seems to be the worst case for cache
thrashing on a lot of these servers.
How much total RAM is in this
On Monday 30 August 2010 17:04, bricklen wrote:
> On Mon, Aug 30, 2010 at 3:28 PM, Kevin Kempter
>
> wrote:
> > Hi all ;
> >
> > we have an automated partition creation process that includes the
> > creation of an FK constraint. we have a few other servers with similar
> > scenarios and this is th
Greg Smith wrote:
Yeb Havinga wrote:
model name : AMD Phenom(tm) II X4 940 Processor @ 3.00GHz
cpu cores : 4
stream compiled with -O3
Function Rate (MB/s) Avg time Min time Max time
Triad: 5395.1815 0.0089 0.0089 0.0089
I'm not sure if Yeb's st
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