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better for all the processor models for the larger combustor_71m and exhaust_33m benchmark cases. The
Performance profile is 1-3% better for the other benchmark cases.
OpenFOAM (Open source Field Operation And Manipulation) is a free, open source software for computational fluid
dynamics (CFD). OpenFOAM was compiled with -march=native / Broadwell option. We used the cavity-1M and
motorBike-11M datasets which are modifications of the OpenFOAM tutorials/incompressible/icoFoam/cavity and
tutorials/incompressible/simpleFoam/motorBike models respectively.
Figure 6: Comparing snoop modes and BIOS Profiles for OpenFOAM Cavity 1M benchmark
As shown in left graph of figure 6 for DAPC System Profile, the benchmark performance increases by 3-6% when in
COD snoop mode when compared to OSB. ES and HS options perform up to 3% lower than OSB across all the
processor models. The pattern is similar for the Performance System Profile, where COD is better by 3-7% followed
by OSB. HS is lower than OSB but better than ES for all the processors models except for the 20core E5-2698 v4
where ES is 1% better than HS for DAPC profile and 7% better than HS for Performance System Profile. There is not
a lot of difference in performance for DAPC Vs Performance profile especially for the higher frequency processors
14core E5-2690v4 and the 16core E5-2697A v4. For the other models the Performance profile shows up to 4%
benefit as shown in the right graph of figure 6.