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This article discusses each type of attack in turn, provides specific examples, and discusses possible mitigation methods.④ Thread switching cost is very high. When the operating system switches threads, the context of the thread needs to be preserved and then the system call is executed. If the number of threads is too high, it will not only bring many useless context switches, but also may cause the time for thread switching to be performed to be even longer than the time for thread execution. At this time, the performance is often that the system load is too high and the utilization rate of CPU SY (system CPU) is extremely high, resulting in the system almost falling into an unavailable state.剧情大纲一： 志贤就像是平日一样，为了把秘书踢开，对著现任的秘书恩雪下达不像话的命令。虽然以前胜者常常是志贤，但是这次似乎不一样，恩雪活用打工时期累积的人脉，将所有不像话的要求完美解决。跟总是找恩雪麻烦的志贤不同，总是替恩雪加油、帮助恩雪的武元，让恩雪慢慢产生好感。　　紫苏以香为媒，搜集青泽的灵魂碎片，并在一次人间战乱中，救下奄奄一息的辛夷，收为奴仆，使其成为碎片的容器。两人开了一间香铺，取名承香苑。拥有碎片的人会被引到这里，紫苏则以交换碎片为条件，满足求香者的愿望。从而经历了一次又一次跌宕起伏的爱情故事和惊心动魄的圆梦之旅。但与此同时，化身国师的反派暴徒玄冥与饮香成性的食香兽花玲儿暗中联手，机关算尽，一心破坏紫苏计划，拖延青泽复活，妄图毁灭人间。帐中除了钟离昧和萧公角，在定陶时与吕臣熟识些，其他人与吕臣并无交情。Fig. 2 Combustion process　　父亲与狗同时走丢了，到底要先找谁？