Dell PowerEdge 1655MC - Manual (Page 18)

Optimal BIOS settings for HPC with Dell PowerEdge 12 th generation servers
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used for the chart is the DAPC profile; all results are relative to DAPC. A bar higher than 1.00
indicates that the application’s performance was that much better when compared to its
performance with the DAPC profile.
From the graph, it is seen that MILC performance is significantly impacted by choice of profile for
DAPC, OS, and Performance.
The Dense System Profile significantly reduces performance for all applications by 8 to 35%. This is
because Turbo Boost is disabled and the system memory is running at the lower speed of 1333MT/s
when using the Dense profile. It is interesting to note that ANSYS Fluent is most severely impacted
by this change.
Figure 5. Performance and Energy Efficiency of System Profiles on applications
* Data collected on a 16-server PowerEdge M620 cluster. Dual Intel Xeon E5-2680 @ 2.7GHz, 8*8GB 1600MT/s
memory per server. Mellanox InfiniBand FDR. Logical Processor and Node Interleaving disabled.
Energy efficiency of all profiles is plotted on the secondary y-axis and is again relative to the DAPC
System Profile. For HPL, Fluent, WRF, and LU the first three profiles (DAPC, OS, and Perf) have
similar energy efficiency. Dense profile with HPL shows a 5% improvement in energy efficiency as
the drop in performance is matched by a significant drop in power consumption as well. Fluent
energy efficiency with Dense profile for the truck_111m benchmark is only 83% of that with DAPC,
and Dense profile is not a good choice for this benchmark.
For NAMD, the OS, and Perf profile shows similar performance (both are 2% better than DAPC). The
energy efficiencies of DAPC, OS, and Dense profiles are similar too. Dense profile has lower
performance (12% lower), but balances that with comparable energy efficiency as the power
consumed is correspondingly lower too.
0.00
0.20
0.40
0.60
0.80
1.00
1.20
0.60
0.70
0.80
0.90
1.00
1.10
1.20
1.30
HPL Fluent
truck_poly_14m
Fluent
truck_111m
WRF
conus_12k
NAMD
stmv
MILC
Intel input file
LU
class D
Ene
rg
y
effie
incy
re
lat
ive
t
o D
A
PC
(hig
he
r
is
be
tt
er
)
Pe
rfor
m
ance
r
el
at
ive
t
o
D
A
PC
(hig
he
r
is be
tt
er
)
Performance and energy efficiency across different profiles
DAPC OS Perf Dense