I have just went through that thread on intel's website. While reading it,I discovered that most if not all developers are not satisfied with intel's approach to AVX. One poster mentioned the biggest deficiency of AVX version 1 and it is :no 256bit integer instruction support. He then mentioned AMD's XOP proposal and NV's Denver project ,both of which are capable of doing 256bit integer SIMD instruction in hardware. Also, the posters(SW devs) weren't pleased at all with the lack of FMA support in Sandy Bridge,while as we know,AMD will have FMA4 support from the start.
Now I'm pretty sure that if AMD gets software developers and partners on board,Bulldozer may end up with big advantage in pure integer media applications that are optimized for 256bit XOP ISA extensions AMD brought to market with bulldozer cores .Not to mention that Bulldozer will have support for IMAC instructions,basically FMA for integer instructions! Intel can't come close to this level of ISA support,even with Haswell.
Regarding the AVX speedups in fp code: as it stands right now,judging from that thread over at intel's website and latest lost circuits article which covers AVX and potential speedups in real world apps, SB may see an average of 20-25% speedup in AVX optimized vs SSE code.This is not that big of advantage especially looking at execution resources intel dedicated for AVX(even though they "borrow" upper 128bits from integer units). AMD may very well see similar gain,or a bit lower(10-15%) with AVX optimized software (comparing 6 core Zambezi running optimized AVX code path to 6 core Thuban running optimized SSE2 code path).
All in all I'm more optimistic as of now . Especially since some folks in the know are suggesting 3.6/3.8Ghz for 8C 95W parts . If we consider the possibility that 8C 125W part may reach 4Ghz and add on that a cheap lowly 500Mhz turbo and 10% IPC improvement,we get to 33% faster than Thuban @ 3.7Ghz(turbo counted in) performance in single thread apps and up to 1.8-2x improvement in well threaded apps
Добавлено через 25 секунд:WWhere whipler писал(а):Да? а сколько электронных книг приличного объёма (не менее 300 страниц) ты осилил?
Я постоянно что то изучаю, если не работаю.
Добавлено через 6 минут 13 секунд:WWhere whipler, понимаешь я вот лично на тебя не собирюсь тратить время на счет того что было прочитано. Прочитано много, если учесть что я как с утра встаю как белка в колесе целый день провожу. И читаю в перерывах.