Asia's most exciting deep tech startup competition is back!Now in its 3rd edition,SLINGSHOT 2019 gives promising startups a global platform to showcase their tech and business ideas in front of the most important ...Asia's most exciting deep tech startup competition is back!Now in its 3rd edition,SLINGSHOT 2019 gives promising startups a global platform to showcase their tech and business ideas in front of the most important investors,corporates and industry leaders.展开更多
The Slingshot interconnect designed by HPE/Cray is becoming more relevant in high-performance computing with its deployment on the upcoming exascale systems.In particular,it is the interconnect empowering the first ex...The Slingshot interconnect designed by HPE/Cray is becoming more relevant in high-performance computing with its deployment on the upcoming exascale systems.In particular,it is the interconnect empowering the first exascale and highest-ranked supercomputer in the world,Frontier.It offers various features such as adaptive routing,congestion control,and isolated workloads.The deployment of newer interconnects sparks interest related to performance,scalability,and any potential bottlenecks as they are critical elements contributing to the scalability across nodes on these systems.In this paper,we delve into the challenges the Slingshot interconnect poses with current state-of-the-art MPI(message passing interface)libraries.In particular,we look at the scalability performance when using Slingshot across nodes.We present a comprehensive evaluation using various MPI and communication libraries including Cray MPICH,Open-MPI+UCX,RCCL,and MVAPICH2 on CPUs and GPUs on the Spock system,an early access cluster deployed with Slingshot-10,AMD MI100 GPUs and AMD Epyc Rome CPUs to emulate the Frontier system.We also evaluate preliminary CPU-based support of MPI libraries on the Slingshot-11 interconnect.展开更多
Slingshot spiders use their conical webs to launch themselves at high speeds to catch prey.We built a launching mechanism inspired by the slingshot spider.Our launch mechanisms comprise a steel structure with eye bolt...Slingshot spiders use their conical webs to launch themselves at high speeds to catch prey.We built a launching mechanism inspired by the slingshot spider.Our launch mechanisms comprise a steel structure with eye bolts to hold a conical web made from latex rubber tubing.We pull the web by a winch using a lever arm.A quick-release mechanism connects the web to the winch using a tough-grid paracord.When we release the quick-return mechanism,the projectile material consisting of a steel ball achieved an acceleration of 5107 m s^(-2) or 521 times gravity,and a speed of 66.41 m s^(-1).The power per unit mass and energy per unit mass of our prototype was one tenth and one fifth that of the spider’s web respectively.In particular,we found that web structure consisting multiple radial web elements reinforced with circumferential web elements provide enhanced stiffness;as a comparison our web had a stiffness of about eight times that of traditional slingshot with a single radial web element.Our results suggest that adapting designs from nature can lead to potentially superior performance of man-made contraptions.展开更多
文摘Asia's most exciting deep tech startup competition is back!Now in its 3rd edition,SLINGSHOT 2019 gives promising startups a global platform to showcase their tech and business ideas in front of the most important investors,corporates and industry leaders.
基金supported in part by the U.S.National Science Foundation under Grant Nos.1818253,1854828,1931537,and 2007991XRAC under Grant No.NCR-130002supported by the Office of Science of the U.S.Department of Energy under Contract No.DE-AC05-00OR22725.
文摘The Slingshot interconnect designed by HPE/Cray is becoming more relevant in high-performance computing with its deployment on the upcoming exascale systems.In particular,it is the interconnect empowering the first exascale and highest-ranked supercomputer in the world,Frontier.It offers various features such as adaptive routing,congestion control,and isolated workloads.The deployment of newer interconnects sparks interest related to performance,scalability,and any potential bottlenecks as they are critical elements contributing to the scalability across nodes on these systems.In this paper,we delve into the challenges the Slingshot interconnect poses with current state-of-the-art MPI(message passing interface)libraries.In particular,we look at the scalability performance when using Slingshot across nodes.We present a comprehensive evaluation using various MPI and communication libraries including Cray MPICH,Open-MPI+UCX,RCCL,and MVAPICH2 on CPUs and GPUs on the Spock system,an early access cluster deployed with Slingshot-10,AMD MI100 GPUs and AMD Epyc Rome CPUs to emulate the Frontier system.We also evaluate preliminary CPU-based support of MPI libraries on the Slingshot-11 interconnect.
文摘Slingshot spiders use their conical webs to launch themselves at high speeds to catch prey.We built a launching mechanism inspired by the slingshot spider.Our launch mechanisms comprise a steel structure with eye bolts to hold a conical web made from latex rubber tubing.We pull the web by a winch using a lever arm.A quick-release mechanism connects the web to the winch using a tough-grid paracord.When we release the quick-return mechanism,the projectile material consisting of a steel ball achieved an acceleration of 5107 m s^(-2) or 521 times gravity,and a speed of 66.41 m s^(-1).The power per unit mass and energy per unit mass of our prototype was one tenth and one fifth that of the spider’s web respectively.In particular,we found that web structure consisting multiple radial web elements reinforced with circumferential web elements provide enhanced stiffness;as a comparison our web had a stiffness of about eight times that of traditional slingshot with a single radial web element.Our results suggest that adapting designs from nature can lead to potentially superior performance of man-made contraptions.
