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Re^4: Very time consuming job with 8 cores +HTT

Fumihito Mohri
qzg00677@nifty.com


Very sorry for the delay

In order to test MKLNP, HTTNP and httfix for the case of dirscf=.t. 
I used Firefly71G and a PC(Win7) having the following CPU (This PC is different one
for the title of " 8 cores +HTT").

CPU Brand String  : Intel(R) Core(TM) i7-3820 CPU @ 3.60GHz
CPU Features    : CMOV, MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2,
HTT, MWAIT, EM64T
actual # of  cores/package :  4
actual # of threads/package :  8
actual # of threads/core  :  2

From this list, it is known that the number of physical cores is 4,
then KMLNP=4 and HTTNP=2. Moreover, I chose httfix=.f. Next, I made four
nodes on the c drive.
c:\node1 c:\node2 c:\node3 c:\node4

Under the above condition, I confirmed that wall-clock time reduced to
less than a third (i.e.1/3) of the single-node calculation, although
the four nodes were generated on the one HD. This is unexpected matter
for me, because I have recognized that parallel calculations of Firefly
require a separate HD for each node. Maybe, use of separate HD is necessary
for the case of dirscf=.f. (i.e disk I/O mode).

best regards,


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