Telefonaktiebolaget Lm Ericsson (publ)

Tomas Ericsson

Per Anders Holmberg

Nils Ola Linnermark

Lars Winberg

Fredrik Strandberg

The read latency caused by job start preparation of a future job is at least partly hidden within the current job by reading information for job start preparation of the future job integrated with the execution of the current job. Instructions for job start preparation are preferably instrumented () into the current job and executed (), whenever possible, in parallel with the instructions of the current job. The integrated job start preparation may include table look-ups, register file updating, instruction fetching and preparation. If the scheduled job order is allowed to change during execution, it is typically necessary to test () whether the next job is still valid before starting the execution, it is typically necessary to test () whether the next job is still valid before starting the execution of the next job and take appropriate actions () depending on the outcome of the test. In addition to reduced job start preparation time, unused slots in the instruction-parallel execution of the current job may be filled up by the added read instructions, thus providing more efficient utilization of the multiple functional execution units of the processor.

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Kista, Sweden

Tomas Ericsson