公开(公告)号：EP2701073B1

公开(公告)日：2018-01-24

申请号：EP11864094.5

申请日：2011-04-18

申请人： Fujitsu Limited

发明人： YAMAUCHI, Hiromasa ,  YAMASHITA, Koichiro ,  SUZUKI, Takahisa ,  KURIHARA, Koji ,  OTOMO, Toshiya ,  ODATE, Naoki

IPC分类号： G06F15/167 ,  G06F12/08 ,  G06F9/50

CPC分类号： G06F9/52 ,  G06F9/3851 ,  G06F9/5027 ,  G06F11/1687 ,  G06F11/1695 ,  G06F12/0811 ,  G06F12/0842

摘要： A first OS (1) dispatches a first thread to a first CPU. The first OS (2) compares the access frequency of shared resources by the first thread and a first threshold. The first OS (3) judges a dependence relationship between the first thread and a second thread under execution by a second CPU. Upon that the access frequency is greater than the first threshold and that no dependence relationship exists (marked by x), the first OS (4) changes the setting of a clock generating circuit so that the phase of the clock to be supplied to the first CPU and the phase of the clock to be supplied to the second CPU are opposite to each other. The first OS (4) changes the setting of the clock generating circuit so that the frequency of the clock to be supplied to the shared resources will be twice as great as the frequency of the clock to be supplied to the first CPU.

公开(公告)号：EP2701073A1

公开(公告)日：2014-02-26

申请号：EP11864094.5

申请日：2011-04-18

申请人： Fujitsu Limited

发明人： YAMAUCHI, Hiromasa ,  YAMASHITA, Koichiro ,  SUZUKI, Takahisa ,  KURIHARA, Koji ,  OTOMO, Toshiya ,  ODATE, Naoki

IPC分类号： G06F15/167 ,  G06F12/08

CPC分类号： G06F9/52 ,  G06F9/3851 ,  G06F9/5027 ,  G06F11/1687 ,  G06F11/1695 ,  G06F12/0811 ,  G06F12/0842

摘要： A first OS (1) dispatches a first thread to a first CPU. The first OS (2) compares the access frequency of shared resources by the first thread and a first threshold. The first OS (3) judges a dependence relationship between the first thread and a second thread under execution by a second CPU. Upon that the access frequency is greater than the first threshold and that no dependence relationship exists (marked by x), the first OS (4) changes the setting of a clock generating circuit so that the phase of the clock to be supplied to the first CPU and the phase of the clock to be supplied to the second CPU are opposite to each other. The first OS (4) changes the setting of the clock generating circuit so that the frequency of the clock to be supplied to the shared resources will be twice as great as the frequency of the clock to be supplied to the first CPU.

摘要翻译： 第一个OS（1）将第一个线程调度到第一个CPU。 第一OS（2）将第一线程的共享资源的访问频率和第一阈值进行比较。 第一OS（3）判断由第二CPU执行的第一线程和第二线程之间的依赖关系。 因此，访问频率大于第一阈值，并且不存在依赖关系（由x标记），第一OS（4）改变时钟发生电路的设置，使得要提供给第一个时钟的时钟的相位 CPU和提供给第二CPU的时钟的相位彼此相反。 第一OS（4）改变时钟发生电路的设置，使得提供给共享资源的时钟的频率将是提供给第一CPU的时钟的频率的两倍。

公开(公告)号：EP2657840A1

公开(公告)日：2013-10-30

申请号：EP10861165.8

申请日：2010-12-22

申请人： Fujitsu Limited

发明人： SUZUKI, Takahisa ,  YAMASHITA, Koichiro ,  YAMAUCHI, Hiromasa ,  KURIHARA, Koji ,  HAYAKAWA, Fumihiko ,  ODATE, Naoki ,  HIRAKI, Tetsuo ,  OTOMO, Toshiya

IPC分类号： G06F9/48

CPC分类号： G06F1/324 ,  G06F1/3203 ,  G06F1/3243 ,  G06F1/3296 ,  G06F9/526 ,  Y02D10/126 ,  Y02D10/152 ,  Y02D10/172

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.

摘要翻译： 当核心访问争用发生在设备时，维护处理性能并降低功耗。 通过检测单元（307），CPU（＃0）检测在设备（＃H0）中形成访问争用的预定核心组的CPU（＃0）和CPU（＃1） 组（205）。 经由识别单元（309）的CPU（＃0）识别设备组（205）中的设备（＃H0）处的访问争用状态。 来自时钟频率表（301）的CPU（＃0）根据设备（＃H0）的访问竞争状态，设备的时钟频率（＃H0）和CPU的时钟频率（＃ 0）和（＃1）。 CPU（＃0）使设备（＃H0）以设备的时钟频率（＃H0）工作，并使CPU（＃0）和（＃1）以预定核心组的时钟频率工作 。