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NumaConnect datasheet


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NumaConnect Adapter Card N313
HTX Connection

Scalable Cache Coherent Shared Memory on your Cluster Budget

Numascale's SMP Adapter is an HTX card made to be used with commodity servers with AMD processors that feature an HTX connector to its HyperTransport interconnect.


NumaConect SMP Adapter N302


NumaConnect Essentials

ccNuma and Numa low latency shared memory interconnect

Virtualizes Everything, Including Memory and IO

>10x price/performance benefit over proprietary solutions

Seamless Scaling of Application Size and Performance - NO Porting Efforts

Scalable, Cache Coherent, Shared Memory System Interconnect
AMD processor nodes with Coherent HyperTransport
Based on field proven design
Enables commodity cost level for high-end servers


NumaConnect Features

Converts between snoop-based (broadcast) and directory based coherency protocols

Write-back to Remote Cache

Non-coherent transactions (for optimized MPI)

Pipelined memory access (16 outstanding transactions + 16 non-coherent)

Remote Cache size up to 4GBytes (remote data)


NumaConnect RAS Features

ECC for single bit correction and double bit detection

Automatic scrubbing after single bit error detection

Automatic background scrubbing to minimize probability of soft error accumulation

Flexible micro-coded coherence processing engine

Watch-bus for internal activity observation in real-time

Built-in Performance Counters


NumaConnect Specifications

Bandwidth to the node-local CPUs
- 1 cHT link (16+16) @800MHz DDR = 6.4GB/s over HTX


Latency for remote accesses
- Short time in node by-pass FIFOs
- Few "hops" on an average access patterns
- Only one or two dimension switch delays worst-case for 2-D or 3-D Torus topologies

Link Speed and capacity
- 4 lane SerDes 4Gb/s per link, 6 links => 96Gb/s = 9.6GBytes/s x2 => 19.2GBytes/s
- Net average throughput on a ring is ≈1.4 times, unidirectional link speed with random access patterns less link and fabric overhead, total for 6 links => 26.9GBytes/s (multiple senders can be active simultaneously)


Remote Cache (RMC)
- 2 or 4 GBytes per node, configurable
- System Performance expected to be more dependent on large size rather than faster access time => use of DRAM
- RMC access time will be close to neighbor CPU node-local memory access time

Address Range
- 12 bits Node ID = 4k nodes max. (Multiple sockets per node possible)
- 48 bits address (256 Terabytes)

- Local Node address range:

• N313-22 56 GigaBytes

• N313-44 112 GigaBytes

• N313-48 240 GigaBytes


NumaConnect OS Support

Linux, Ubuntu, CentOs, redhat


Numascale SMP Adapter

The Change is on

From Cluster
shared memory with ccnuma by numachip
To Scalable ccNUMA SMP















Cache Coherence - ccNuma - Clusters - Coherent - Directory Based Cache Coherence - Hypertransport - InfiniBand - Numa - NumaChip - Numascale - Snooping