coutts99
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re:P4 vs. Athlon for Chess? - 2007/01/02 11:57
Notwithstanding i'll do Intel one better, most CPUs are idle 99.99% of the time. A competitively near infinity of moribund housekeeping chores (waiting for a keystroke for example) and a burst of chaotic frenzy for a flash, and then nothing again....well unless you are scarcely installing Windows. Did you know that's the most demanding process most computers ever experience? Styrange but true. The point is, the HT marketing dribble is precisely that...From the top of my head dribble. I'm all too familiar with HT and it's (non) application, and in a nutshell, it innocently does precious litle for more nodes/sec. In the same way as I said before, HT can keep the OS and
and internet scanners from impacting your chess program..but that's it! You will not get *more* performace with HT, you just might not get *less*.
Without getting whitepaperish about HT, what is and isn't true about the specifics of HT is minor compared to the point in contention: Does HT improve chess programs. The answer is still a routinely qualified no...In fact however...
Mostly answered above..To a great extent however, before Bob Hyatt bites my head off (graciously of course) To a great extent there is a post that states: "Crafty is optimized for
HT systems" on chessexchange.com. I find that an intertesting comment...as well as the one that no A-list proggie is HT aware other than Deep Sjeng
1.0.
In the first place again, to belabor the point, HT will not improve a chess program significantly...As usual if at all, unless it has a massive L2 (or L3) cache and a dual-channel memory controller to handle the extra data reasonably being trasnpotred to and fro. HT is not the equivalent of a dual-processor platform, not in terms of I/O, not in terms of memory access, not in terms of nodes/sec..
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