John VanDyk has been innovating with information technology for more than 20 years. Read more...
How Does Hyperthreading Affect an ALLPATHS-LG Run?
In running ALLPATHS-LG, a short read genome assembler, on a Dell PowerEdge R920 with four Xeon E7-4860v2 processors running at 2.60GHz, I did one run with hyperthreading on and one with hyperthreading off. This was mainly to see if the increased cache size on the physical CPU core with hyperthreading off had a positive effect on performance.
I'll take all the anticipation away: Nope. Hyperthreading wins.
|GB of total available memory||1511.6||1511.6|
|hours of total elapsed time||30.32||28.81|
|hours of total per-module elapsed||30.33||28.82|
|hours of total per-module user time||357.57||630.52|
|effective parallelization factor||11.79||21.88|
|GB memory usage peak||457.13||457.13|