Title:
TRACE FETCHING SYSTEM FOR PLURAL ONLINE CONTROL PROGRAMS
Document Type and Number:
Japanese Patent JP3147862
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To fetch valid fault analysis data without raising the load by means of trace fetching and without omission of trace data, even for a constitution where a plurality of online control programs operate.
SOLUTION: When the event of trace fetching is generated from an online control program 11, a trace fetching means 111 decides whether or not the trace fetching means 121 of an online control program 12 is in the midst of operation. A semaphore 14 which realizes exclusive access is used for the deciding method. The trace fetching means 111 stores trace data in a memory 15, when the trace fetching means 121 is not operated. The trace fetching means 111 writes stored data into a secondary storage device 2 by a trace writing means 13 and switches an inner buffer to a different buffer, when stored data in the inner buffer 152 exceeds prescribed quantity.
Inventors:
Toshiyuki Akiyama
Application Number:
JP19314798A
Publication Date:
March 19, 2001
Filing Date:
July 08, 1998
Export Citation:
Assignee:
NEC
International Classes:
G06F11/34; (IPC1-7): G06F11/34
Domestic Patent References:
| JP1055294A | ||||
| JP5854467A | ||||
| JP9319638A | ||||
| JP325633A | ||||
| JP4309159A | ||||
| JP2250127A | ||||
| JP844595A | ||||
| JP1125633A | ||||
| JP4307641A |
Attorney, Agent or Firm:
Nobuo Takahashi (3 outside)