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Yellow Dog Linux

YDEL 6.1 Benchmark Performance

Linpack Testing

The following benchmarks were tested using:

  • A single IBM BladeCenter QS22 with 8GB of Memory
  • A USB SSD drive with 475 hugepages
  • /tmp mounted as tmpfs so OpenMPI never hits the disk

All tests used the same xhpl binary provided by IBM. The results are provided in Gigaflops for two different problem sizes, as well as the average of those results.

Linpack Results - Single Processor
  Gflops for problem size 12288 Gflops for problem size 16384 Average (Gflops) YDEL Performance Increase
YDEL 6.1 SP 48.26 66.97 57.62  
RHEL 5.3 SP 47.5 65.94 56.72 1.58%
Fedora 10 SP 48.2 66.6 57.4 0.37%
         
Linpack Results - Multi-processor, Shared Memory
  Gigaflops for problem size 12288 Gigaflops for problem size 16384 Average (Gflops) YDEL Performance Increase
YDEL 6.1 MP Shmem 48.52 67.48 58  
RHEL 5.3 MP Shmem 48.4 66.91 57.66 0.60%
Fedora 10 MP Shmem 47.12 65.26 56.19 3.22%
         

I/O Testing with Bonnie++

The following benchmarks were tested using:

  • A single IBM BladeCenter QS22 with 8GB of Memory
  • A USB SSD drive with 0 hugepages
  • /tmp mounted as tmpfs so OpenMPI never hits the disk

The Bonnie++ over NFS connection ran through the Bladecenter switch, a non-intelligent Gig-e switch, and Cat-6 cables to an x86_64 host with a Intel 82541PI (e1000) ethernet controller. The x86_64 host is running an unmodified Centos 5.3 with kernel 2.6.18-92.el5.

Due to inconsistencies in the results generated by back-to-back benchmarks using Fedora, we have not published these results.

Bonnie++ Results
  Block Write Block Read Average (MB/s) YDEL Performance Increase (%)
YDEL NFS 31702 463828 241.96  
RHEL NFS 25786 388665 202.37 19.56%
YDEL tmpfs 821538 340453 567.38  
RHEL tmpfs 787142 340060 550.39 3.09%
Fedora tmpfs 347367 582374 453.98 24.89%
         

FFTW 256X256X256

FFTW 3.2.1 was compiled using ppu-gcc and "./configure --enable-cell". These are the average results of 3 passes of the test program using 256x256x256 problem. Deviation between the three passes was less than 5%.

FFWT Results
  Mflops YDEL Performance Increase (%)
YDEL 13258  
RHEL 12912.67 2.67%
Fedora 11446.33 15.83%
     
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