The Gemini Co-processor is fine-tuned for HPC applications over uDAPL and OpenIB software stacks. It offloads network transport layer functionality to hardware for supporting send/receive, Remote Direct Memory Access (RDMA) and Datagram oriented communication protocols, allowing compute nodes to communicate efficiently. Direct user level hardware access to 4096 simultaneous connection oriented and connectionless hardware endpoints (scalable upto 16K) is provided to support applications of larger problem sizes. Gemini is capable of performing I/O from paged virtual memory with byte aligned addresses and reliable communication of maximum 4 GByte message length.

Specifications

• based on GEMINI communication co-processor
• PCI express (x4/x8) full duplex based host interface
• 10Gbps Full duplex CX-4 link interface
• 16 Mbytes on board memory
• Transport protocol offload engine supporting send/receive, RDMA and datagram protocols
• Proprietary hardware protocol implemented using Dual 32-bit CPUs for low latencies and reliable communication
• Direct user level access to 4096 simultaneous connection oriented or connectionless hardware endpoints (scalable upto 16K)
• Capable of performing I/O from paged virtual memory with byte aligned addresses
• Address Translation table for VA-PA with protection implemented in hardware
• Communicates to host through Interrupt Queue and Completion Queues

Gemini Architecture

Contact Us

Mr. Atul Bodas
HPC-Technologies Group
Centre for Development of Advanced Computing
Pune University Campus,
Ganesh Khind,
Pune - 411 007 India.
Tel: +91-20-2570-4100 Ext. : 329
Fax: +91-20-2569-4004 Email: atulb[at]cdac[dot]in