Glaurung and hyperthreading?

[hcyrano]

who have already try glaurung with hyperthreading, i am curious of this

have you stats?

[Dann Corbit]

who have already try glaurung with hyperthreading, i am curious of this

have you stats?

I have not tried it but I have never seen any chess engine get a big benefit from hyperthreading.

It seems to me that the big benefit from hyperthreading would occur if you have a huge number of context switches from competing programs that are not CPU starved. Once the CPU is pegged, switching to another thread is not going to give any big benefit.

[bob]

who have already try glaurung with hyperthreading, i am curious of this

have you stats?

I have not tried it but I have never seen any chess engine get a big benefit from hyperthreading.

It seems to me that the big benefit from hyperthreading would occur if you have a huge number of context switches from competing programs that are not CPU starved. Once the CPU is pegged, switching to another thread is not going to give any big benefit.

The biggest help is for a program that is memory-bandwidth intensive in places. Hyper-threading will allow a second thread to run while the memory accesses are done. But parallel search overhead usually costs more than the HT gain...

[hcyrano]

humm....

see this news

http://www.tomshardware.com/reviews/Int ... 57-12.html

[Vinvin]

23.8% faster in NPS but probably not stronger in play because going from 4 threads to 8 is a big lost in parallel efficiency.