HPCC results on an HPC (beowulf-style) cluster using CentOS 6.2

I have finally had a chance to carryout a few HPCC benchmark runs. As with the Linpack benchmarks I have compiled the HPCC benchmark with MKL and with ATLAS. 

Generally speaking MKL continues to perform better than ATLAS but clearly some of the benchmarks are hardly affected at all by the choice of library, which should not be surprising as some of the tests relate to latency and memory performance.

It is worth bearing in mind that this two node cluster does not have its own separate network switch and thus results will vary more than in a cluster with dedicated networking.

MKL	ATLAS
HPL_Tflops=0.0689043	HPL_Tflops=0.025042
StarDGEMM_Gflops=6.98082	StarDGEMM_Gflops=1.95127
SingleDGEMM_Gflops=8.489	SingleDGEMM_Gflops=2.0767
PTRANS_GBs=0.285695	PTRANS_GBs=0.282756
MPIRandomAccess_LCG_GUPs=0.0107743	MPIRandomAccess_LCG_GUPs=0.0106545
MPIRandomAccess_GUPs=0.00980471	MPIRandomAccess_GUPs=0.011238
StarRandomAccess_LCG_GUPs=0.00292826	StarRandomAccess_LCG_GUPs=0.00305111
SingleRandomAccess_LCG_GUPs=0.0202582	SingleRandomAccess_LCG_GUPs=0.0209147
StarRandomAccess_GUPs=0.00294884	StarRandomAccess_GUPs=0.0030755
SingleRandomAccess_GUPs=0.0222603	SingleRandomAccess_GUPs=0.0219117
StarSTREAM_Copy=0.424375	StarSTREAM_Copy=0.49285
StarSTREAM_Scale=0.445834	StarSTREAM_Scale=0.52021
StarSTREAM_Add=0.596884	StarSTREAM_Add=0.629714
StarSTREAM_Triad=0.640154	StarSTREAM_Triad=0.684154
SingleSTREAM_Copy=3.0544	SingleSTREAM_Copy=3.06379
SingleSTREAM_Scale=3.03374	SingleSTREAM_Scale=3.03051
SingleSTREAM_Add=3.339	SingleSTREAM_Add=3.332
SingleSTREAM_Triad=3.32887	SingleSTREAM_Triad=3.31208
StarFFT_Gflops=0.242265	StarFFT_Gflops=0.233275
SingleFFT_Gflops=0.894628	SingleFFT_Gflops=0.93583
MPIFFT_Gflops=0.55462	MPIFFT_Gflops=0.402139
MaxPingPongLatency_usec=717.918	MaxPingPongLatency_usec=499.696
RandomlyOrderedRingLatency_usec=393.943	RandomlyOrderedRingLatency_usec=201.655
MinPingPongBandwidth_GBytes=0.0386536	MinPingPongBandwidth_GBytes=0.0312215
NaturallyOrderedRingBandwidth_GBytes=0.0129542	NaturallyOrderedRingBandwidth_GBytes=0.012228
RandomlyOrderedRingBandwidth_GBytes=0.021249	RandomlyOrderedRingBandwidth_GBytes=0.016799
MinPingPongLatency_usec=0.384119	MinPingPongLatency_usec=0.357628
AvgPingPongLatency_usec=332.504	AvgPingPongLatency_usec=291.221
MaxPingPongBandwidth_GBytes=3.87644	MaxPingPongBandwidth_GBytes=3.36689
AvgPingPongBandwidth_GBytes=0.839076	AvgPingPongBandwidth_GBytes=0.479826
NaturallyOrderedRingLatency_usec=585.89	NaturallyOrderedRingLatency_usec=293.112