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across the benchmark cases across all processor models. After COD and OSB, ES option is better for lower core
counts and HS for 16, 20 and 22 core processors. As mentioned previously, the system in ES mode starts paying the
penalty of having lower request tokens per core for higher core counts compared to the other snoop modes.
Figure 3: DAPC vs. Performance with COD snoop mode for STARCCM+
The graph in figure 3 compares the System Profile BIOS options DAPC and Performance. We are comparing the
performance of COD.Perf with respect to COD.DAPC, which is the red baseline set at 1 in the graph. The
Performance profile provides 2-4% benefit over the DAPC for the Civil_20m benchmark for all the processor models.
Also for the high core count, E5-2699 v4 the Performance profile performs 2-5% better across all the benchmarks.
For all the other processor models there is not a significant gain (only about 1%) with the Performance profile for all
the benchmarks (except Civil_20m).
ANSYS Fluent is a computational fluid dynamics application. Fluent provides multiple benchmark cases. We picked
four representative cases from the v16 benchmark suite: combustor_12m, combustor_71m, exhaust_system_33m
and ice_2m and one from the older v15 benchmark suite: truck_poly_14m, to allow us to compare our data with
previous generation processor models. The Fluent benchmarks exhibit a similar pattern as LS-DYNA and STAR-
CCM+ benchmarks.