NDPF Node Performance

Node performance figures for the NDPF farm nodes

Note performance in the NDPF is internally expressen in GHzHr-equivalents, where a 1 GHzHrEquiv should be the integer performance of a single-core Pentium-3 processor with a clock frequency of 1GHz. To convert this into SpecInt-2000 numbers, a conversion factor of 410 has been applied: 1GHzHrEquiv corresponds to 410 SI2k, although this is a known understatement of the actual performance. Since this number has been hard-coded in all conversion script that publish accounting data to the outside world, it means that from now on the "official" SI2k ratings we get from vendors and our own tests must be converted to GHzHrEquiv values using this factor (410), and then be entered in the appropriate configuration file /etc/pbsaccdb.conf.

Node type: pizza0

These system are dual-Pentium3 CPUs at 0.933 GHz, on an MSI motherboard. Equivalent systems rate at approximately 403-429 SI2k. The overhead incurred by running two simultaneous jobs has not been taken into account.

pbsaccdb factor: 416/410 = 1.015

Node type: AMDNCF

These systems are dual Athon MP2000+ systems. Equivalent systems rate at approx. 690 SI2k (the overhead incurred by running two simultaneous jobs has not been taken into account). Note that our own performance tests using the D0 MC application actually showed a true speed doubling compared to pizza0, so a factor of 2 would not have been unreasonable.

pbsaccdb factor: 690/410 = 1.68

Node type: Halloween

These systems are dual Xeon 2.8 GHz systems with 1MB L2 cache. Hyperthreading is not used. Equivalent systems rate at 1288 SI2k.

pbsaccdb factor: 1288/410 = 3.14

Node type: Bulldozer

These systems are dual Xeon 3.2 GHz with 2 MB L2 cache. Hyperthreading is not used. Equivalent systems rate at 1555 (Dell PowerEdge 1850).

pbsaccdb factor: 1555/410 = 3.79

Node type: Luilak-1

These systems are Dell PowerEdge 1950 (Intel Xeon processor 5150, 2.66GHz) rated at 2764 when used with one process (specification by Dell, July 2006). With four simultaneous jobs, this degrades to XXX.

pbsaccdb factor: 2764/410 = 6.74