Nvidia探索將多GPU封裝到一塊:輕鬆打破 - 3C

By Cara
at 2017-07-04T19:46
at 2017-07-04T19:46
Table of Contents
Nvidia探索將多GPU封裝到一塊:輕鬆打破舊架構極限
http://www.cnbeta.com/articles/tech/628297.htm
商業計算、可選研究、以及4K多屏遊戲等需求,不斷推升著對現代GPU的性能需求。根據
一份近期的研究報告,Nvidia認為正在迅速接近當前GPU架構模型的極限,因此需要尋找
新的方法去攻堅。當前這個想法仍處於模擬階段,但文中提到的“多芯片模塊GPU”(
MCM-GPU)的概念,有望最終將多顆GPU模塊整合到一處。
在意識到Nvidia 將很快難以通過當前架構榨取GPU 性能之後,亞利桑那州立大學、英偉
達、德州大學奧斯汀分校、以及巴塞羅那超算中心攜手展開了研究。
此前,廠商還可以通過在每次製程迭代時堆積更多的流處理器來提升GPU 性能。但遺憾的
是,在單一模塊中塞入更多晶體管的方法,已經變得越來越困難。
以Nvidia V100 GPU 為例,其已經需要代工廠商(台積電)將製程推到12nm 的極限。此
外,製造規模越來越大的模塊,其成本和相關問題也不可忽視(比如因製造錯誤遇到的數
量減少)。
雖然Nvidia 可以通過將多顆GPU 裝在一塊PCB 上的方式來提升顯卡性能(比如Tesla
K10 和K80),但當前仍有一些未能解決的問題—— 比如跨多GPU 的任務分配就需要編程
來提升硬件效率。
於是研究人員們另闢蹊徑,決定在封裝技術上尋找新方法,讓Nvidia 可以將多個GPU 模
塊(GPMs)封裝到一塊。這些GPMs 比當代GPU 要小一些,製造起來也更容易和便宜。
儘管人們對其性能仍有疑問,但研究人員聲稱近期基板技術的發展(PDF)已經能夠幫助
其部署一種快速、強健的模塊通信互聯架構。從理論上來講,其帶寬可達數TB/s 。
在Nvidia 內部GPU 模擬中,研究團隊將MCM-GPU 堆到了256 組SMs,而Pascal 架構僅為
56 組SMs 。然後團隊基於當前架構進行了預測,結果顯示MCM-GPU 可提速45.5% 。
此外,在同一板子上進行的多GPU性能對比表明,MCM-GPU有26.8%的領先優勢。最後,有
消息稱AMD公司也有類似的點子(基於Navi GPU)。
--
GPU也即將邁入大膠水時代?
--
http://www.cnbeta.com/articles/tech/628297.htm
商業計算、可選研究、以及4K多屏遊戲等需求,不斷推升著對現代GPU的性能需求。根據
一份近期的研究報告,Nvidia認為正在迅速接近當前GPU架構模型的極限,因此需要尋找
新的方法去攻堅。當前這個想法仍處於模擬階段,但文中提到的“多芯片模塊GPU”(
MCM-GPU)的概念,有望最終將多顆GPU模塊整合到一處。
在意識到Nvidia 將很快難以通過當前架構榨取GPU 性能之後,亞利桑那州立大學、英偉
達、德州大學奧斯汀分校、以及巴塞羅那超算中心攜手展開了研究。
此前,廠商還可以通過在每次製程迭代時堆積更多的流處理器來提升GPU 性能。但遺憾的
是,在單一模塊中塞入更多晶體管的方法,已經變得越來越困難。
以Nvidia V100 GPU 為例,其已經需要代工廠商(台積電)將製程推到12nm 的極限。此
外,製造規模越來越大的模塊,其成本和相關問題也不可忽視(比如因製造錯誤遇到的數
量減少)。
雖然Nvidia 可以通過將多顆GPU 裝在一塊PCB 上的方式來提升顯卡性能(比如Tesla
K10 和K80),但當前仍有一些未能解決的問題—— 比如跨多GPU 的任務分配就需要編程
來提升硬件效率。
於是研究人員們另闢蹊徑,決定在封裝技術上尋找新方法,讓Nvidia 可以將多個GPU 模
塊(GPMs)封裝到一塊。這些GPMs 比當代GPU 要小一些,製造起來也更容易和便宜。
儘管人們對其性能仍有疑問,但研究人員聲稱近期基板技術的發展(PDF)已經能夠幫助
其部署一種快速、強健的模塊通信互聯架構。從理論上來講,其帶寬可達數TB/s 。
在Nvidia 內部GPU 模擬中,研究團隊將MCM-GPU 堆到了256 組SMs,而Pascal 架構僅為
56 組SMs 。然後團隊基於當前架構進行了預測,結果顯示MCM-GPU 可提速45.5% 。
此外,在同一板子上進行的多GPU性能對比表明,MCM-GPU有26.8%的領先優勢。最後,有
消息稱AMD公司也有類似的點子(基於Navi GPU)。
--
GPU也即將邁入大膠水時代?
--
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