Method and Apparatus for Processing Data
Methods and apparatuses for processing data are provided. In one embodiment, a data processing operation which is assigned a predefined maximum duration is started. The progress of the data processing operation is checked at a predefined point in time and a priority of the data processing operation is changed on the basis of the progress of the data processing operation.
1 . A method for processing data, comprising:
starting a data processing operation which is assigned a predefined maximum duration,
checking the progress of the data processing operation at a predefined point in time before the maximum duration expires, and
changing a priority of the data processing operation on the basis of the progress of the data processing operation.
2 . The method of claim 1 ,
wherein the data processing operation is selected from the group comprising a thread in a multithreading system, a process in a multiprocessor system and a task in a multiprocessor system.
3 . The method of claim 1 , wherein checking the progress of the data processing operation comprises comparing a number of executed instructions of the data processing operation with at least one predefined comparison value.
4 . The method of claim 3 ,
wherein the at least one predefined comparison value comprises a first comparison value,
the priority of the data processing operation being increased if the number of executed instructions is less than the first comparison value.
5 . The method of claim 3 ,
wherein the at least one predefined comparison value comprises a second comparison value,
the priority of the data processing operation being decreased if the number of executed instructions is greater than the second predefined comparison value.
6 . The method of claim 1 ,
wherein checking the progress comprising checking the progress at a plurality of predefined points in time before the maximum duration expires, and
wherein changing the priority of the data processing operation comprising changing the priority of the data processing operation at any predefined point in time on the basis of the progress of the data processing operation.
7 . The method of claim 1 ,
wherein the predefined point in time is a predefined period of time after the data processing operation has been started.
8 . A method for processing data, comprising:
executing a first data processing operation and a second data processing operation in parallel to the first data processing operation,
determining the progress of the first data processing operation and the progress of the second data processing operation, and
changing a priority of the first data processing operation and/or a priority of the second data processing operation depending on the progress of the first data processing operation and the progress of the second data processing operation.
9 . The method of claim 8 ,
wherein determining the progress comprising determining a number of executed instructions of the first data processing operation and a number of executed instructions of the second data processing operation.
10 . The method of claim 8 ,
wherein the priority of the first data processing operation and/or the priority of the second data processing operation are changed in such a manner that a function of the progress of the first data processing operation and of the progress of the second data processing operation is regulated to a predefined value.
11 . The method of claim 8 , further comprising
controlling access to a hardware component selected from the group comprising a cache memory, an external memory and a bus depending on the priority.
12 . An apparatus for processing data, comprising:
data processing circuitry, and
evaluation circuitry for checking the progress of a data processing operation being executed on the data processing circuitry, the evaluation circuitry being configured to check a progress of the data processing operation at a predefined point in time before a predefined maximum duration of the data processing operation expires and to change a priority of the data processing operation on the basis of the progress of the data processing operation.
13 . The apparatus of claim 12 ,
wherein the evaluation circuitry comprises a timer and an interrupt controller, the evaluation circuitry being configured such that the timer, after a predefined period of time following the start of the data processing operation has expired, drives the interrupt controller to trigger an interrupt on the data processing circuitry, whereupon the data processing circuitry checks the progress of the data processing operation.
14 . The apparatus of claim 12 ,
wherein the evaluation circuitry comprises an instruction counter for counting a number of executed instructions of the data processing operation, and
wherein the operation of checking the progress comprises comparing the number of executed instructions with a predefined comparison value.
15 . The apparatus of claim 12 , wherein the evaluation circuitry is at least partially identical to the data processing circuitry.
16 . The apparatus of claim 12 ,
the evaluation circuitry being configured to directly change a priority of the data processing operation without using the data processing circuitry.
17 . The apparatus of claim 12 ,
wherein the evaluation circuitry comprises at least one separate module.
18 . The apparatus of claim 12 ,
wherein the data processing circuitry comprises a multithreading processor.
19 . The apparatus of claim 12 ,
wherein the data processing circuitry comprises at least two processor units,
the at least two processor units being configured to access shared hardware components on the basis of priorities of data processing operations running on the processor units.
20 . The apparatus of claim 12 ,
the apparatus being configured to process real-time data processing operations.
21 . An apparatus for processing data, comprising:
data processing circuitry for parallel execution of a first data processing operation and a second data processing operation, and
evaluation circuitry configured to determine a progress of the first data processing operation and of the second data processing operation and to change a priority of the first data processing operation and/or a priority of the second data processing operation on the basis of the progress of the first data processing operation and the progress of the second data processing operation.
22 . The apparatus of claim 21 ,
wherein the data processing circuitry comprises a multithreading processor.
23 . The apparatus of claim 21 ,
wherein the data processing circuitry comprises at least two processor units,
the at least two processor units being configured to access shared hardware components on the basis of priorities of data processing operations running on the processor units.