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[TechReport]A quick look at Bulldozer thread scheduling - Page 5

post #41 of 46
I have a hard time caring at all. Bulldozer, even in highly threaded apps, doesn't beat sandy bridge in performance, performance per watt, or comparative value. Its performance in apps that utilize 4 threads or less, when scheduled correctly, goes from terrible to about as good as last generation from AMD. No matter how the threads are scheduled, bulldozer is still not at all competitive with intel period.
post #42 of 46
Actually, it is competitive with SB when FMA, XOP, etc and all 8 threads are used.

So yeah. Barely competitive.
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post #43 of 46
Quote:
Originally Posted by Brutuz View Post
Actually, it is competitive with SB when FMA, XOP, etc and all 8 threads are used.

So yeah. Barely competitive.
yea while drawing a ton more power than SB
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post #44 of 46
Lets give it a 20% increase in performance. Using Piccolor real world results for over all performance, we see the 8150 is still behind the i7 2500k, and is still 10% slower then the 990x.

If we give it a 20% increase performance for Piccolor sythenic results, it is still behind sandy bridge 2500k and is still 10% slower then the top rated 990x.

What does that really mean?

Even with proper performance balancing, on a few test it still is behind intel's cheaper 2500k. For being revolutionary, it is kind of sad.
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post #45 of 46
Quote:
Originally Posted by RiverOfIce View Post
Even with proper performance balancing, on a few test it still is behind intel's cheaper 2500k. For being revolutionary, it is kind of sad.
Because of:

1) Poor caches, which implies
2) Poor manufacturing, which implies
3) Poor 32nm process, which implies
4) Possibility to be refined, which implies
5) Possibility to be improved, ergo better performance.


Right now, BD's performance is entirely dependant on what GloFo can do to improve their silicon. The AMD design is there, and can only be tweaked. The major responsibility on its performance now relies on GloFo's ability to produce decent speed caches and decent transistor gatings which do not leak.

We can only wait and see if GloFo improves the 32nm process... Or either AMD rethinks the processor to be manufactured on a bulk CMOS process instead of SOI and TSMC can build it. Remember that TSMC's 28nm process is impressively efficient and cost-effective.
   
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post #46 of 46
Quote:
Originally Posted by james8 View Post
yea while drawing a ton more power than SB
Have you even kept updated with Bulldozer reviews, threads, etc?

Poor yields were the cause of its (original) insane tdp, now it's more in line with other 32nm CPUs (Using around the same as a 980X) and drawing similar power to an OCed SB.
Not to mention a bit of it was due to inefficiency and cache thrashing, all of BDs problems come down to GoFlo now for having a astonishingly bad 32nm process...TSMCs 40nm process was better, at least that was only bad yields.
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