Yves Dorfsman wrote: > I know that disabling hyper-threading in the BIOS improves performance for > some type of applications. > > Has anybody looked into, or has experience the impact of disabling VT and > VT-d > on performance? > > Thanks. > > It depends greatly upon the application. Some multi-threaded applications get boost from having it enabled as it helps with hardware context switching. Single-threaded monolithic applications can benefit by not having this on and having one per core. There are many other factors including whether the application fits in cache that affect performance too.
I'll tell you one thing that really does seem to help, regardless. Intel's new Turbo functionality. This is great stuff. If you're only using 1 core of the CPU, it will disable the other 3 and overclock the core that you are using giving you up to 400mhz speed boost. It's good stuff. They do this by dynamically keeping track of the heat dissipation envelope for the socket and adjusting things dynamically. It's all about heat. (They can also power down logic components, like floating point units, if not being used.) _______________________________________________ Tech mailing list [email protected] http://lopsa.org/cgi-bin/mailman/listinfo/tech This list provided by the League of Professional System Administrators http://lopsa.org/
