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    • 1. 发明申请
    • METHOD AND CACHE SYSTEM WITH SOFT I-MRU MEMBER PROTECTION SCHEME DURING MAKE MRU ALLOCATION
    • 在制作MRU分配过程中使用软I-MRU成员保护方案的方法和缓存系统
    • US20080082754A1
    • 2008-04-03
    • US11538091
    • 2006-10-03
    • Robert H. BellJeffrey A. Stuecheli
    • Robert H. BellJeffrey A. Stuecheli
    • G06F13/00
    • G06F12/126
    • A caching mechanism implementing a “soft” Instruction-Most Recently Used (I-MRU) protection scheme whereby the selected I-MRU member (cache line) is only protected for a limited number of eviction cycles unless that member is updated/utilized during the period. An update or access to the instruction restarts the countdown that determines when the cache line is no longer protected as the I-MRU. Accordingly, only frequently used Instruction lines are protected, and old I-MRU lines age out of the cache. The old I-MRU members are evicted, such that all the members of a congruence class may be used for data. The I-MRU aging is accomplished through a counter or a linear feedback shift register (LFSR)-based “shootdown” of I-MRU cache lines. The LFSR is tuned such that an I-MRU line will be protected for a pre-established number of evictions.
    • 实现“软”指令 - 最近使用(I-MRU)保护方案的缓存机制,由此所选择的I-MRU成员(高速缓存行)仅对有限数量的驱逐周期进行保护,除非该成员在 期。 对该指令的更新或访问将重新启动倒数计时,以确定高速缓存行何时不再受I-MRU的保护。 因此,只有经常使用的指令行被保护,并且旧的I-MRU线老化在高速缓存之外。 旧的I-MRU成员被驱逐出来,使得一致等级的所有成员都可以用于数据。 I-MRU老化通过I-MRU高速缓存线的计数器或线性反馈移位寄存器(LFSR)的“下降”来实现。 调整LFSR,使得I-MRU线路将受到预先确定的驱逐次数的保护。
    • 4. 发明授权
    • Buck regulators with adjustable clock frequency to achieve dropout voltage reduction
    • 降压稳压​​器可调节时钟频率,实现压降降压
    • US08193798B1
    • 2012-06-05
    • US12608676
    • 2009-10-29
    • W. David PaceRobert H. BellSteven L. Harris
    • W. David PaceRobert H. BellSteven L. Harris
    • G05F1/00
    • H02M3/156
    • A method includes generating a drive signal for a transistor in a switching regulator. The drive signal turns the transistor on and off to generate a regulated output voltage. The drive signal is generated based on a clock signal. The method also includes dynamically decreasing a frequency of the clock signal to decrease a dropout voltage of the switching regulator. Dynamically decreasing the frequency of the clock signal can increase a duration of switching periods defined by the clock signal. The dropout voltage could have a first value proportional to TOFF—MIN/TON—MAX during shorter switching periods and a second value proportional to TOFF—MIN/TON—MAX—DFC during longer switching periods. TOFF—MIN represents a minimum amount of off-time for the transistor during each switching period, TON—MAX represents a maximum amount of on-time for the transistor during shorter switching periods, and TON—MAX—DFC represent a maximum amount of on-time for the transistor during longer switching periods.
    • 一种方法包括在开关调节器中产生晶体管的驱动信号。 驱动信号使晶体管导通和关断,以产生稳定的输出电压。 基于时钟信号产生驱动信号。 该方法还包括动态地降低时钟信号的频率以减小开关调节器的压差电压。 动态地降低时钟信号的频率可以增加由时钟信号限定的开关周期的持续时间。 在更短的开关周期期间,压差电压可以具有与TOFF-MIN / TON-MAX成比例的第一值,在较长的开关周期期间,与TOFF-MIN / TON-MAX-DFC成比例的第二值。 TOFF-MIN表示在每个开关周期期间晶体管的截止时间的最小值,TON-MAX表示在较短的开关周期期间晶体管的导通时间的最大值,TON-MAX-DFC表示最大的导通时间 在更长的开关周期内为晶体管提供时间。
    • 10. 发明授权
    • Enhanced coherency tracking with implementation of region victim hash for region coherence arrays
    • 增强了一致性跟踪,实现区域相干阵列的区域受害者散列
    • US08694732B2
    • 2014-04-08
    • US13398922
    • 2012-02-17
    • Robert H. BellJason F. Cantin
    • Robert H. BellJason F. Cantin
    • G06F12/00
    • G06F12/082G06F12/12G06F2212/171
    • A method and system for precisely tracking lines evicted from a region coherence array (RCA) without requiring eviction of the lines from a processor's cache hierarchy. The RCA is a set-associative array which contains region entries consisting of a region address tag, a set of bits for the region coherence state, and a line-count for tracking the number of region lines cached by the processor. Tracking of the RCA is facilitated by a non-tagged hash table of counts represented by a Region Victim Hash (RVH). When a region is evicted from the RCA, and lines from the evicted region still reside in the processor's caches (i.e., the region's line-count is non-zero), the RCA line-count is added to the corresponding RVH count. The RVH count is decremented by the value of the region line count following a subsequent processor cache eviction/invalidation of the region previously evicted from the RCA.
    • 一种用于精确跟踪从区域相干阵列(RCA)中逐出的线而不需要从处理器的高速缓存层次结构中排除线路的方法和系统。 RCA是一个集合关联数组,其中包含由区域地址标签,区域相干状态的一组位组成的区域条目,以及用于跟踪由处理器缓存的区域行数的行计数。 通过由区域受害者哈希(RVH)表示的计数的非标记哈希表来促进RCA的跟踪。 当区域从RCA中逐出时,并且来自被驱逐区域的线路仍然驻留在处理器的高速缓存中(即,该区域的行计数不为零)时,将RCA线路计数添加到相应的RVH计数。 RVH计数在随后的处理器缓存驱逐/无效以前从RCA中逐出的区域之后减少区域行计数的值。