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    11.
    发明专利
    未知

    公开(公告)号：DE3689991D1

    公开(公告)日：1994-09-01

    申请号：DE3689991

    申请日：1986-05-23

    Applicant: IBM

    Inventor： HAMMER WILLIAM ELDER ,  SCHWANE WALTER HENRY ,  ZIECINA FREDERICK JOSEPH

    IPC: G06F12/00 ,  G06F9/46 ,  G06F13/00 ,  G06F15/16 ,  G06F15/177 ,  H04L29/00

    Abstract: A data management mechanism for a processor system provides for management of data with minimum data transfer between processes executing work requests. Each process has storage areas for storing data associated with work requests. The data is described with descriptor elements in the work requests which indicate the location and length of segments of the data. Data is transferred to a process only if it is required for execu-tion of a work request. Further work requests can be generated by a process executing a work request which reference the data without the process actually receiving the data. The segments of data may reside in storage areas of different processors with the descriptor elements of a work request defining a logical data stream.

    Bus flow control system
    14.
    发明专利
    Bus flow control system 未知

    公开(公告)号：SG9495G

    公开(公告)日：1995-06-16

    申请号：SG9495

    申请日：1995-01-21

    Applicant: IBM

    Inventor： HAMMER WILLIAM ELDER ,  SCHWANE WALTER HENRY ,  ZIECINA FREDERICK JOSEPH

    IPC: G06F9/46 ,  G06F9/50 ,  G06F9/54 ,  G06F15/16 ,  G06F15/177

    Abstract: The flow of work requests in a server driven process to process communication environment is described. Logical connections between processes and bus managers interfacing bus units (50, 52) to an I/O bus (54) are assigned to connection groups for management by the bus managers. Each bus unit has its own connection groups for the logical connections. Bus unit resources are assigned to each connection group based on performance factors, and a series of bus unit messages are used to control the flow of work so that a group which has no more resources will not accept further work requests. The originator of the work requests will resequence rejected work requests and resend them when the connection group has freed up resources. A further mechanism is provided to facilitate work consistent with the server driven architecture when bus units do not have adequate DMA capabilities. Two ways of reversing control of transfer of work requests and data so that the server need not have master DMA capability are presented. Management of storage in a remote processor is used to transfer work and its associated data into storage accessible by a bus unit with slave DMA capability. The slave DMA bus unit then transfers the information into storage it manages. In another way of reversing the flow, a bus unit message is used to make the original server a requestor. The bus unit message contains information which varies the request sent by the requestor. In this manner, the server, which was the original requestor transfers information using its master DMA capability flow.

    16.
    发明专利
    未知

    公开(公告)号：DE3851507T2

    公开(公告)日：1995-03-30

    申请号：DE3851507

    申请日：1988-09-27

    Applicant: IBM

    Inventor： HAMMER WILLIAM ELDER ,  SCHWANE WALTER HENRY ,  ZIECINA FREDERICK JOSEPH

    IPC: G06F9/46 ,  G06F9/50 ,  G06F9/54 ,  G06F15/16 ,  G06F15/177

    Abstract: The flow of work requests in a server driven process to process communication environment is described. Logical connections between processes and bus managers interfacing bus units (50, 52) to an I/O bus (54) are assigned to connection groups for management by the bus managers. Each bus unit has its own connection groups for the logical connections. Bus unit resources are assigned to each connection group based on performance factors, and a series of bus unit messages are used to control the flow of work so that a group which has no more resources will not accept further work requests. The originator of the work requests will resequence rejected work requests and resend them when the connection group has freed up resources. A further mechanism is provided to facilitate work consistent with the server driven architecture when bus units do not have adequate DMA capabilities. Two ways of reversing control of transfer of work requests and data so that the server need not have master DMA capability are presented. Management of storage in a remote processor is used to transfer work and its associated data into storage accessible by a bus unit with slave DMA capability. The slave DMA bus unit then transfers the information into storage it manages. In another way of reversing the flow, a bus unit message is used to make the original server a requestor. The bus unit message contains information which varies the request sent by the requestor. In this manner, the server, which was the original requestor transfers information using its master DMA capability flow.

    17.
    发明专利
    未知

    公开(公告)号：DE3852378D1

    公开(公告)日：1995-01-19

    申请号：DE3852378

    申请日：1988-09-13

    Applicant: IBM

    Inventor： BATRA SURINDER PAUL ,  HAMMER WILLIAM ELDER ,  MARQUART DAVID WAYNE ,  SCHWANE WALTER HENRY ,  ZIECINA FREDERICK JOSEPH ,  LUSHINSKY GENE ARTHUR

    IPC: G06F13/28 ,  G06F13/42 ,  G06F15/16 ,  G06F15/177 ,  G06F9/46

    Abstract: The flow of work requests in a server driven process to process communication environment is described. Logical connections between processes and bus managers interfacing bus units (50, 52) to an I/O bus (54) are assigned to connection groups (86, 88) for management by the bus managers. Each bus unit has its own connection groups for the logical connections. Bus unit resources are assigned to each connection group based on performance factors, and a series of bus unit messages are used to control the flow of work so that a group which has no more resources will not accept further work requests. The originator of the work requests will resequence rejected work requests and resend them when the connection group has freed up resources. A further mechanism is provided to facilitate work consistent with the server driven architecture when bus units do not have adequate DMA capabilities. Two ways of reversing control of transfer of work requests and data so that the server need not have master DMA capability are presented. Management of storage in a remote processor is used to transfer work and its associated data into storage accessible by a bus unit with slave DMA capability. The slave DMA bus unit then transfers the information into storage is manages. In another way of reversing the flow, a bus unit message is used to make the original server a requestor. The bus unit message contains information which varies the request sent by the requestor. In this manner, the server, which was the original requestor transfers information using its master DMA capability flow.

    18.
    发明专利
    未知

    公开(公告)号：ES2059555T3

    公开(公告)日：1994-11-16

    申请号：ES88480039

    申请日：1988-09-27

    Applicant: IBM

    Inventor： HAMMER WILLIAM ELDER ,  SCHWANE WALTER HENRY ,  ZIECINA FREDERICK JOSEPH

    IPC: G06F9/46 ,  G06F9/50 ,  G06F9/54 ,  G06F15/16 ,  G06F15/177

    Abstract: The flow of work requests in a server driven process to process communication environment is described. Logical connections between processes and bus managers interfacing bus units (50, 52) to an I/O bus (54) are assigned to connection groups for management by the bus managers. Each bus unit has its own connection groups for the logical connections. Bus unit resources are assigned to each connection group based on performance factors, and a series of bus unit messages are used to control the flow of work so that a group which has no more resources will not accept further work requests. The originator of the work requests will resequence rejected work requests and resend them when the connection group has freed up resources. A further mechanism is provided to facilitate work consistent with the server driven architecture when bus units do not have adequate DMA capabilities. Two ways of reversing control of transfer of work requests and data so that the server need not have master DMA capability are presented. Management of storage in a remote processor is used to transfer work and its associated data into storage accessible by a bus unit with slave DMA capability. The slave DMA bus unit then transfers the information into storage it manages. In another way of reversing the flow, a bus unit message is used to make the original server a requestor. The bus unit message contains information which varies the request sent by the requestor. In this manner, the server, which was the original requestor transfers information using its master DMA capability flow.

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