Any basis for decreased performance with Hyper Threading?

Question

I've just been reading some suggestions from a forum saying that if one disables HT in BIOS, better performance might be obtained (at least for the game Flight Simulator 2004). Does HT actually decrease performance/affect non-compatible software?

Message Edited by jeffyen on 06-23-2004 01:54 PM

Message Edited by jeffyen on 06-23-2004 02:04 PM

jeffyen · Answer

Thanks Matt, would you happen to know under what circumstances will HT decrease performance? Are there known software/software types that don't work well with HT algorithms?

mattcowger · Answer

HT will not significantly decrease performance for the VAST majority of software.

jeffyen · Answer

Thanks again matt...

mattcowger · Answer

Software that simply assumes that a SMP system will get double the performance, and make assumptions based on that will likely experience decreased performance under HT. HT really helps with scheduling, so any single threaded app, or apps with a primary thread and 1 or 2 secondary, minor threadds (like games) will experience an increase.

There are VERY FEW apps that experience a decrease.

Agent Orange · Answer

ars technica has a pretty good overview of hyperthreading and will have probably more than you ever wanted to know.... http://arstechnica.com/paedia/h/hyperthreading/hyperthreading-1.html cheers

Locked Topics – Laptops General

Any basis for decreased performance with Hyper Threading?

Was this post helpful?