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    • 5. 发明授权
    • Method and system for handling cache coherency for self-modifying code
    • 用于处理缓存一致性的自修改代码的方法和系统
    • US08015362B2
    • 2011-09-06
    • US12031923
    • 2008-02-15
    • Gregory W. AlexanderChristian JacobiBarry W. KrummChung-Lung Kevin ShumAaron Tsai
    • Gregory W. AlexanderChristian JacobiBarry W. KrummChung-Lung Kevin ShumAaron Tsai
    • G06F12/00
    • G06F12/0848G06F9/3812
    • A method for handling cache coherency includes allocating a tag when a cache line is not exclusive in a data cache for a store operation, and sending the tag and an exclusive fetch for the line to coherency logic. An invalidation request is sent within a minimum amount of time to an I-cache, preferably only if it has fetched to the line and has not been invalidated since, which request includes an address to be invalidated, the tag, and an indicator specifying the line is for a PSC operation. The method further includes comparing the request address against stored addresses of prefetched instructions, and in response to a match, sending a match indicator and the tag to an LSU, within a maximum amount of time. The match indicator is timed, relative to exclusive data return, such that the LSU can discard prefetched instructions following execution of the store operation that stores to a line subject to an exclusive data return, and for which the match is indicated.
    • 一种用于处理高速缓存一致性的方法包括当高速缓存行在存储操作的数据高速缓存中不排斥时分配标签,以及将该标签和该行的独占提取发送到一致性逻辑。 无效请求在最小时间内被发送到I缓存,优选地只有当它已经被取出到该行并且没有被无效时,因为哪个请求包括要被无效的地址,该标签和一个指示 线路用于PSC操作。 该方法还包括将请求地址与预取指令的存储地址进行比较,并且响应于匹配,在最大时间量内向LSU发送匹配指示符和标签。 匹配指示符相对于独占数据返回是定时的,使得LSU可以执行存储操作之后丢弃预取指令,存储到受独占数据返回的行,并且指示匹配。
    • 7. 发明申请
    • METHOD AND SYSTEM FOR HANDLING CACHE COHERENCY FOR SELF-MODIFYING CODE
    • 用于处理自我修改代码的高速缓存的方法和系统
    • US20090210627A1
    • 2009-08-20
    • US12031923
    • 2008-02-15
    • Gregory W. AlexanderChristian JacobiBarry W. KrummChung-Lung Kevin ShumAaron Tsai
    • Gregory W. AlexanderChristian JacobiBarry W. KrummChung-Lung Kevin ShumAaron Tsai
    • G06F12/00
    • G06F12/0848G06F9/3812
    • A method for handling cache coherency includes allocating a tag when a cache line is not exclusive in a data cache for a store operation, and sending the tag and an exclusive fetch for the line to coherency logic. An invalidation request is sent within a minimum amount of time to an I-cache, preferably only if it has fetched to the line and has not been invalidated since, which request includes an address to be invalidated, the tag, and an indicator specifying the line is for a PSC operation. The method further includes comparing the request address against stored addresses of prefetched instructions, and in response to a match, sending a match indicator and the tag to an LSU, within a maximum amount of time. The match indicator is timed, relative to exclusive data return, such that the LSU can discard prefetched instructions following execution of the store operation that stores to a line subject to an exclusive data return, and for which the match is indicated.
    • 一种用于处理高速缓存一致性的方法包括当高速缓存行在存储操作的数据高速缓存中不排斥时分配标签,以及将该标签和该行的独占提取发送到一致性逻辑。 无效请求在最小时间内被发送到I缓存,优选地只有当它已经被取出到该行并且没有被无效时,因为哪个请求包括要被无效的地址,该标签和一个指示 线路用于PSC操作。 该方法还包括将请求地址与预取指令的存储地址进行比较,并且响应于匹配,在最大时间量内向LSU发送匹配指示符和标签。 匹配指示符相对于独占数据返回是定时的,使得LSU可以执行存储操作之后丢弃预取指令,存储到受独占数据返回的行,并且指示匹配。