Method and System for Automatic Selection of Test Cases

• US 20090006066A1
• Filed: 06/28/2007
• Published: 01/01/2009
• Est. Priority Date: 06/28/2007
• Status: Abandoned Application

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Reysa, John R., Kozitza, Brian L., Behm, Michael L., Farago, Steven R.
• Application Number:
  US11/769,794
• Publication Number:
  US 20090006066A1
• Time in Patent Office: Days
• US Class Current: 703/15
• CPC Class Codes: G06F 11/261 by simulating additional hardware, e.g. fault simulation
• CPC Class Codes: G06F 30/33 Design verification, e.g. functional simulation or model checking

Abstract

A system for selecting a test case. A test case with a high score is selected. A simulation job is run on a device under test on a plurality of processors using the selected test case. Simulation performance and coverage data is collected for the selected test case and the collected simulation performance and coverage data is stored in a database.

Claims

1. A computer implemented method for selecting a test case, the computer implemented method comprising:

selecting a test case with a high score to form a selected test case;

running a simulation job on a device under test on a plurality of processors using the selected test case;

collecting simulation performance and coverage data for the selected test case to form collected simulation performance and coverage data; and

storing the collected simulation performance and coverage data in a database to form stored simulation performance and coverage data.

2. The computer implemented method of claim 1, further comprising:

determining if it is time to calculate test case scores;

responsive to determining that it is time to calculate the test case scores, querying the database for the stored simulation performance and coverage data;

calculating the test case scores using the stored simulation performance and coverage data to form calculated test case scores; and

storing the calculated test case scores.

3. The computer implemented method of claim 1, wherein the simulation job is used to verify that a new or modified hardware design is logically correct.

4. The computer implemented method of claim 1, wherein the plurality of processors comprise a compute farm.

5. The computer implemented method of claim 2, wherein the time to calculate the test case scores is a predetermined time interval.

6. The computer implemented method of claim 1, wherein a data collection infrastructure component collects the simulation performance and coverage data for the selected test case.

7. The computer implemented method of claim 6, wherein the data collection infrastructure component includes a set of scripts, and wherein the set of scripts are a set of perl scripts.

8. The computer implemented method of claim 1, wherein the database stores the simulation performance and coverage data for the selected test case in four tables, and wherein the four tables are a test case table, a job table, an event table, and a coverage table.

9. The computer implemented method of claim 8, wherein the test case table stores data that is common to every execution of the selected test case during the simulation job, and wherein the job table stores job specific data, and wherein the event table stores all coverage event names for a new or modified hardware design, and wherein the coverage table stores a list of pairs of event table references and counts.

10. The computer implemented method of claim 1, wherein the device under test is a software model of a new or modified hardware design.

11. The computer implemented method of claim 1, wherein the device under test defines coverage events that need to be hit by the selected test case.

12. The computer implemented method of claim 1, wherein an autosubmitter selects the test case with the high score and runs the simulation job on the device under test on the plurality of processors using the selected test case.

13. The computer implemented method of claim 2, wherein a test case score calculator queries the database to find all coverage events not yet hit within a specified period of time, and wherein the specified period of time is one month.

14. The computer implemented method of claim 1, wherein the selected test case is one of a plurality of test cases.

15. The computer implemented method of claim 1, wherein the high score is a high probability score, and wherein the high probability score is proportional to an assigned score for the selected test case relative to a sum of all test case scores.

16. The computer implemented method of claim 12, wherein the autosubmitter runs only those test cases that are most likely to hit unobserved coverage events.

17. The computer implemented method of claim 14, wherein the plurality of test cases test coverage events in a new or modified hardware design during the simulation job, and wherein the coverage events are desired states within the new or modified hardware design.

18. A data processing system for selecting a test case, comprising:

a bus system;

a storage device connected to the bus system, wherein the storage device includes a set of instructions; and

a processing unit connected to the bus system, wherein the processing unit executes the set of instructions to select a test case with a high score to form a selected test case, run a simulation job on a device under test on a plurality of processors using the selected test case, collect simulation performance and coverage data for the selected test case to form collected simulation performance and coverage data, and store the collected simulation performance and coverage data in a database to form stored simulation performance and coverage data.

19. A computer program product for selecting a test case, the computer program product comprising:

a computer usable medium having computer usable program code embodied therein, the computer usable medium comprising;

computer usable program code configured to select a test case with a high score to form a selected test case;

computer usable program code configured to run a simulation job on a device under test on a plurality of processors using the selected test case;

computer usable program code configured to collect simulation performance and coverage data for the selected test case to form collected simulation performance and coverage data; and

computer usable program code configured to store the collected simulation performance and coverage data in a database to form stored simulation performance and coverage data.

20. The computer program product of claim 19, further comprising:

computer usable program code configured to determine if it is time to calculate test case scores;

computer usable program code configured to query the database for the stored simulation performance and coverage data in response to determining that it is time to calculate the test case scores;

computer usable program code configured to calculate the test case scores using the stored simulation performance and coverage data to form calculated test case scores; and

computer usable program code configured to store the calculated test case scores.