Performance enhancement implementation through buffer management/bridge settings

A method for modifying bridges within a data processing system to provide improved performance, the method comprising:

• determining a number of input/output adapters connected to a host bridge;
• determining a type of each input/output adapter connected to the host bridge;
• modifying the size and number of buffers within the host bridge to match the number of input/output adapters and to match the type of each input/output adapter;
• and
• modifying an intermediary bridge between the host bridge and an individual one of the input/output adapters such that, during read operations, the intermediary bridge prefetches an amount of data no greater than the size of a buffer within the individual one of the input/output adapters.

A computer program product in a computer readable media for use in a data processing system for modifying bridges within the data processing system to provide improved performance, the computer program product comprising:

• first instructions for determining a number of input/output adapters connected to a host bridge;
• second instructions for determining a type of each input/output adapter connected to the host bridge;
• and
• third instructions for modifying the size and number of buffers within the host bridge to match the number of input/output adapters and to match the type of each input/output adapter.

A computer program product in a computer readable media for use in a data processing system for modifying bridges within the data processing system to provide improved performance, the computer program product comprising:

• first instructions for determining a number of input/output adapters connected to a host bridge;
• second instructions for determining a type of each input/output adapter connected to the host bridge;
• third instructions for modifying the size and number of buffers within the host bridge to match the number of input/output adapters and to match the type of each input/output adapter;
• and
• fourth instructions for modifying an intermediary bridge between the host bridge and an individual one of the input/output adapters such that, during read operations, the intermediary bridge prefetches an amount of data no greater than the size of a buffer within the individual one of the input/output adapters.

A system for modifying bridges within a data processing system to provide improved performance, the system comprising:

• first means for determining a number of input/output adapters connected to a host bridge;
• second means for determining a type of each input/output adapter connected to the host bridge;
• and
• third means for modifying the size and number of buffers within the host bridge to match the number of input/output adapters and to match the type of each input/output adapter.

A system for modifying bridges within a data processing system to provide improved performance, the system comprising:

• first means for determining a number of input/output adapters connected to a host bridge;
• second means for determining a type of each input/output adapter connected to the host bridge;
• p1 third means for modifying the size and number of buffers within the host bridge to match the number of input/output adapters and to match the type of each input/output adapter;
• and
• fourth means for modifying an intermediary bridge between the host bridge and an individual one of the input/output adapters such that, during read operations, the intermediary bridge prefetches an amount of data no greater than the size of a buffer within the individual one of the input/output adapters.

A bridge for use in a data processing system, the bridge comprising:

• a first input/output connection for coupling the bridge to a first bus, wherein the first bus provides a connection to the data processing system;
• a second input/output connection for coupling the bridge to a second bus, wherein the second bus provides a connection to an input/output adapter;
• and
• a buffer for storing prefetched data prior to sending the prefetched data to the input/output adapter;
• wherein the bridge is configured to prefetch an amount of data based on the identity of the type of input/output adapter connected to the bridge via the second bus.

A host bridge for use in a data processing system;

• the host bridge comprising:
• a plurality of first input/output connections for coupling a plurality of bridges to the host bridge;
• a second input/output connection for coupling the host bridge to the data processing system;
• and
• a plurality of buffers for storing prefetched data prior to sending the prefetched data to an input/output adapter coupled to one of the plurality of bridges;
• wherein the number and size of the buffers is configured in response to a determination of the number and type of input/output adapters coupled to the host bridge through the plurality of bridges.