Title:
MULTIPROCESSOR COUNT VALUE CORRECTION DEVICE AND MULTIPROCESSOR HAVING THE SAME
Document Type and Number:
WIPO Patent Application WO/2010/038459
Kind Code:
A1
Abstract:
When using a plurality of processors having operation frequencies which can be changed, a clock cycle count value of each of the processors is corrected to a common time elapse so as to be used for analyzing a performance.
Provided is a multiprocessor count value correction device including: a processor identifier acquisition unit (21) which acquires a processor identifier; a clock frequency change detection unit (24) which detects a change of the clock frequency; a clock frequency setting unit (12) which sets the changed clock frequency; a clock cycle count value acquisition unit (22) which acquires a clock cycle count value upon the change; a clock frequency change history holding unit (26) which holds the clock frequency upon the change detection and the clock cycle count value while correlating them to the processor identifier; and a clock cycle count value correction unit (25) which derives a virtual time of each processor in accordance with the change history information.
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Inventors:
KARINO SHUICHI (JP)
Application Number:
PCT/JP2009/005063
Publication Date:
April 08, 2010
Filing Date:
September 30, 2009
Export Citation:
Assignee:
NEC CORP (JP)
KARINO SHUICHI (JP)
KARINO SHUICHI (JP)
International Classes:
G06F11/28; G06F1/04; G06F1/14
Foreign References:
| JPH08137572A | 1996-05-31 | |||
| JP2005235054A | 2005-09-02 | |||
| JP2006344020A | 2006-12-21 | |||
| JP2007188152A | 2007-07-26 |
Attorney, Agent or Firm:
NISHIMURA, YUKUO (JP)
Yukio Nishimura (JP)
Yukio Nishimura (JP)
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