发明公开
EP2657840A1 MULTI-CORE PROCESSOR SYSTEM AND POWER CONTROL METHOD
审中-公开
VERFAHREN ZUR LEISTUNGSREGELUNG的多媒体播放器
- 专利标题： MULTI-CORE PROCESSOR SYSTEM AND POWER CONTROL METHOD
- 专利标题（中）： VERFAHREN ZUR LEISTUNGSREGELUNG的多媒体播放器
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申请号： EP10861165.8申请日： 2010-12-22
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公开(公告)号： EP2657840A1公开(公告)日： 2013-10-30
- 发明人: SUZUKI, Takahisa , YAMASHITA, Koichiro , YAMAUCHI, Hiromasa , KURIHARA, Koji , HAYAKAWA, Fumihiko , ODATE, Naoki , HIRAKI, Tetsuo , OTOMO, Toshiya
- 申请人： Fujitsu Limited
- 申请人地址： 1-1, Kamikodanaka 4-chome Nakahara-ku Kawasaki-shi, Kanagawa 211-8588 JP
- 专利权人： Fujitsu Limited
- 当前专利权人： Fujitsu Limited
- 当前专利权人地址： 1-1, Kamikodanaka 4-chome Nakahara-ku Kawasaki-shi, Kanagawa 211-8588 JP
- 代理机构： Ward, James Norman
- 国际公布： WO2012086040 20120628
- 主分类号： G06F9/48
- IPC分类号： G06F9/48
摘要：
When access contention by cores occurs at a device, processing performance is maintained and power consumption is reduced. A CPU (#0), via a detecting unit (307), detects the CPU (#0) and a CPU (#1), which form a predetermined core group that causes access contention at a device (#H0) in a device group (205). The CPU (#0), via an identifying unit (309), identifies the access contention state at the device (#H0) in the device group (205). The CPU (#0), from a clock frequency table (301), extracts according to the access contention state at the device (#H0), a clock frequency for the device (#H0) and a clock frequency for the CPUs (#0) and (#1). The CPU (#0) causes the device (#H0) to operate at the clock frequency for the device (#H0) and causes the CPUs (#0) and (#1) to operate at the clock frequency for the predetermined core group.
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