Target computer processor unit (cpu) determination during cache injection using input/output (i/o) adapter resources

A system for target computer processor unit (CPU) determination during cache injection using input/output (I/O) adapter resources, comprising:

• an I/O adapter;
• and
• a processor complex including a hierarchically organized cache system, the processor complex in communication with the I/O adapter;
• wherein the I/O adapter executes logic for performing:
• receiving and storing locations of cache lines for cache affinity scheduled processes in a table on the I/O adapter;
• setting a cache injection hint in an input/output (I/O) transaction when an address in the I/O transaction is found in the table, the cache injection hint operable for performing direct cache injection;
• entering a central processing unit (CPU) identifier and cache type in the I/O transaction;
• and
• updating a cache by injecting data values of the I/O transaction into the cache as determined by the CPU identifier and the cache type associated with the address in the table.

A computer program product for target computer processor unit (CPU) determination during cache injection using input/output (I/O) adapter resources, the computer program product comprising:

• a storage medium readable by a processing circuit and storing instructions for execution by the processing circuit for implementing a method, the method comprising:
• storing locations of cache lines for cache affinity scheduled processes in a table on an input/output (I/O) adapter;
• setting a cache injection hint in an input/output (I/O) transaction when an address in the I/O transaction is found in the table, the cache injection hint operable for performing direct cache injection;
• entering a central processing unit (CPU) identifier and cache type in the I/O transaction;
• and
• updating a cache by injecting data values of the I/O transaction into the cache as determined by the CPU identifier and the cache type associated with the address in the table.