Telefonaktiebolaget Lm Ericsson (publ)

Nils Ola Linnermark

Per Anders Holmberg

Lars Winberg

Karl U Carlsson

Terje Egeland

Magnus Carlsson

Tomas Ericsson

Karl Oscar Joachim Str&ouml;mbergson

Mats Winberg

Fredrik Strandberg

Marijan Hemetek

Karl Oscar Joachim Strömbergson

A system and method for supporting tracking of data values of original source code at execution of a translated target version of the source code on a computer system. The system associates references to target data value containers in the target code with corresponding address information of original data value containers of the source code during program code translation. The system also stores, at execution of the target code, information related to target code instructions together with associated address information of original data value containers of the source code to uphold a data value view of the original source code.

Data value coherence in computer systems

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.

Hidden job start preparation in an instruction-parallel processor system

The invention is directed toward a multiprocessing system having multiple processing units. For at least one of the processing units in the multiprocessing system, a first job signal is assigned to the processing unit for speculative execution of a corresponding first job, and a further job signal is assigned to the processing unit for speculative execution of a corresponding further job. The speculative execution of said further job is initiated when the processing unit has completed execution of the first job. If desirable, even more job signals may be assigned to the processing unit for speculative execution. In this way, multiple job signals are assigned to the processing units of the processing system, and the processing units are allowed to execute a plurality of jobs speculatively while waiting for commit priority. By assigning multiple job signals for speculative execution by one or more processing units, the effects of variations in execution time between jobs are neutralized, and the overall performance of the processing system is substantially improved.

Multiple job signals per processing unit in a multiprocessing system

A method and apparatus for detecting events occurring in a telecommunications network is disclosed which comprises stored program control (SPC) exchanges, each SPC exchange comprising a switch and processors for executing software programs to control the switch. Code sequences, or daemons, are implanted in selected portions of the software programs, each code sequence including a conditional statement responsive to certain events and at least one activity resulting from the detection of a certain event satisfying the conditional statement. A lock value is assigned to each of the code sequences, each lock value uniquely identifying the corresponding code sequences and being operable to activate the processor for executing the code sequence. A key value is compared to each lock value for selectively activating the processor to execute the code sequence when the key value equals the lock value. The processor executes the activity specified in the code sequence if the detected event satisfies the conditional statement and continues execution of the software program whereby continuous-processing in the SPC exchange is maintained.

Tracing with keys and locks

Tracing with keys and locks on a telecommunication network

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Johanneshov, Sweden

Nils Ola Linnermark