You clearly dont understand how HT works. Here's a brief overview: HT makes a single CPU core look like two CPU's it does this so that the OS can schedule additional tasks on the second "virtual" CPU and hence make use of potentially idle execution units in the "physical" CPU.
The problem comes from at least two potential issues. 1. The "physical" CPU may not have any idle execution units due to the design of the code being run and hence a conflict now exists. 2. The data and or code needed to satisfy the second "virtual" CPU's process requirements invalidates in some way the data / code for the primary CPU's process. This causes additional pipeline stalls reducing NOT increasing the efficiency of the CPU. So yes HT can help but it does not always help due to the potential conflicts for resources that exist which don't exist in a true SMP system. Tomshardware has some nice info on this: http://www.tomshardware.com/cpu/20040528/index.html Steve / K ----- Original Message ----- From: "K. Mike Bradley" > I am going to try this one more time. > > Again, the Operating system HAS THREADS TOO !!!!!!!!!!!!! > > I AM PRETTY SURE THE OS HAS AT LEAST ONE THREAD !!!!!!!! > Lets pick the csrss.exe (Client server run time sub system) process (which > btw services win32 calls ... Something HLDS.exe needs). > > HL one main thread > PLUS ++++++++ > OS at least one thread (but probably several dozen more) > THAT ADDS UP TO at the very least ... TWO. > > A MP (Multi processor) system would therefore have better performance. > > Because two threads run simultaneously. > This is the point I was making and I did say I don't know about HT but with > MP HLDS.exe is better. > > If you got bad results with your benchmark testing HLDS.exe on MP, I would > look at it again. ================================================ This e.mail is private and confidential between Multiplay (UK) Ltd. and the person or entity to whom it is addressed. In the event of misdirection, the recipient is prohibited from using, copying, printing or otherwise disseminating it or any information contained in it. In the event of misdirection, illegible or incomplete transmission please telephone (023) 8024 3137 or return the E.mail to [EMAIL PROTECTED] _______________________________________________ To unsubscribe, edit your list preferences, or view the list archives, please visit: http://list.valvesoftware.com/mailman/listinfo/hlds
