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该文介绍了基于目标代码(二进制编译文件)为Linux运行时系统内核内存映像打补丁以修改内核的原理和方法,并给出了一个示例场景和程序以说明其应用。掌握该方法对于内核开发、系统调试和系统安全都具有重要的实用价值。 相似文献
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IIntroduct1OllThe star graph【1]proposed as a particular case ofC叫ley graphs[ZJ Is vertex-and edge-symmetric.strongly hlerarchlcal,maximally tault-tolerant,strongly resilient and has diameter and node degreethat are superior to those of a slmll。-slied hypercube(which Is also a Cnyley graph)IOr parallelcomputers[3].MNor references can be found In studying the star graph regarding its propertiesllJ,e毗edding cwabllity[4],communication c叩劝ility[5-71,andfanfaut-toierm尬 cap劝ility… 相似文献
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The star networks,which were originally proposed by Akers and Harel,have suffered from a rigorous restriction on the number of nodes.The general incomplete star networks(GISN) are proposed in this paper to relieve this restriction.An efficient labeling scheme for GISN is given,and routing and broadcasting algorithms are also presented for GIS.The communication diameter of GISN is shown to be bounded by 4n-7.The proposed single node broadcasting algorithm is optimal with respect to time complexity O(nlog2n). 相似文献
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在Xen虚拟化环境下,Credit调度算法是非抢占式调度算法,当虚拟CPU空时它不会将空闲状态信息通知给Xen,因此不会放弃物理CPU的使用权.虽然已有文献提出在虚拟CPU空闲时的处理方法,但它依然存在很多问题,例如空闲虚拟CPU的空闲时间还存在浪费的现象、没有考虑特权Service OS的空闲状态和虚拟机空闲状态判断不准确等,这造成很多不必要的性能损失.针对这样的问题,在Credit算法的基础上提出了虚拟CPU空闲调度算法,虚拟CPU空闲状态接收模块接收到的虚拟CPU空闲通知,动态调整该虚拟机的虚拟CPU的credit值,并将空闲的CPU时间分配给调度队列中其他的虚拟CPU使用.同时,根据该虚拟机的虚拟CPU的平均空闲率,重新调整该虚拟机的权重,从而实现了反馈控制与虚拟机调度的动态集成,实验结果证明该调度方法使系统的整体性能得到大大提高. 相似文献
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