公开(公告)号：US20200014631A1

公开(公告)日：2020-01-09

申请号：US16235265

申请日：2018-12-28

Applicant: Graphcore Limited

Inventor： Ola Tørudbakken ,  Daniel John Pelham Wikinson ,  Richard Luke Sothwell Osborne ,  Stephen Felix ,  Matthew David Fyles ,  Brian Manula ,  Harald Høeg

IPC: H04L12/801 ,  H04L29/06 ,  G06F15/173 ,  G06F15/167 ,  H04L29/08

Abstract: A gateway for interfacing a host with a subsystem for acting as a work accelerator to the host, the gateway enabling the transfer of batches of data to and from the subsystem at pre-compiled data exchange synchronisation points attained by the subsystem. The gateway is configured to: receive from a storage system data determined by the host to be processed by the subsystem; store a number of credits indicating the availability of data for transfer to the subsystem at each pre-compiled data exchange synchronisation point; receive a synchronisation request from the subsystem when it attains a data exchange synchronisation point; and in response to determining that the number of credits comprises a non-zero number of credits: transmit a synchronisation acknowledgment to the subsystem; and cause the received data to be transferred to the subsystem.