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1. 发明授权

US08924922B2 Pre-compiling hosted managed code 有权
标题翻译：预编译托管托管代码
公开(公告)号：US08924922B2
公开(公告)日：2014-12-30
申请号：US12814511
申请日：2010-06-14
申请人： Surupa Biswas , David L. Detlefs , Bruce T. Forstall , Raja Krishnaswamy , Kevin Bradley Frei
发明人： Surupa Biswas , David L. Detlefs , Bruce T. Forstall , Raja Krishnaswamy , Kevin Bradley Frei
IPC分类号： G06F9/44 , G06F9/455
CPC分类号： G06F9/45516
摘要： A hosted pre-compilation system is described herein that provides a way to enable ahead-of-time compilation for managed code running inside a host. The host triggers ahead-of-time compilation at application runtime, after any configuration settings are available. The host can choose which modules to compile, when to compile them, and where to persist the generated images. Upon detecting a module load, the host can trigger pre-compilation, provide the loader an existing pre-compiled image of the module, or do nothing. The runtime/platform validates the integrity of any host-supplied pre-compiled image and provides application programming interfaces (APIs) to inform the host when an image becomes invalid and fails to load. The platform also provides APIs to let the host trigger compilation of binaries at any time relevant to the host, and to generate the images either synchronously or in a background process.
摘要翻译：本文描述了一种托管的预编译系统，它提供了一种在主机内部运行的托管代码实现预先编译的方法。在任何配置设置可用后，主机会在应用程序运行时触发提前编译。主机可以选择要编译的模块，何时编译它们以及在哪里持续生成的图像。在检测到模块负载时，主机可以触发预编译，为加载程序提供模块的现有预编译映像，或者什么都不做。运行时/平台验证任何主机提供的预编译映像的完整性，并提供应用程序编程接口（API），以便在映像无效并且加载失败时通知主机。该平台还提供API，让主机在与主机相关的任何时间触发二进制文件的编译，并同步或在后台进程中生成图像。

2. 发明申请

US20110307858A1 PRE-COMPILING HOSTED MANAGED CODE 有权
标题翻译：预编译管理代码
公开(公告)号：US20110307858A1
公开(公告)日：2011-12-15
申请号：US12814511
申请日：2010-06-14
申请人： Surupa Biswas , David L. Detlefs , Bruce T. Forstall , Raja Krishnaswamy , Kevin Bradley Frei
发明人： Surupa Biswas , David L. Detlefs , Bruce T. Forstall , Raja Krishnaswamy , Kevin Bradley Frei
IPC分类号： G06F9/44 , G06F9/45
CPC分类号： G06F9/45516
摘要： A hosted pre-compilation system is described herein that provides a way to enable ahead-of-time compilation for managed code running inside a host. The host triggers ahead-of-time compilation at application runtime, after any configuration settings are available. The host can choose which modules to compile, when to compile them, and where to persist the generated images. Upon detecting a module load, the host can trigger pre-compilation, provide the loader an existing pre-compiled image of the module, or do nothing. The runtime/platform validates the integrity of any host-supplied pre-compiled image and provides application programming interfaces (APIs) to inform the host when an image becomes invalid and fails to load. The platform also provides APIs to let the host trigger compilation of binaries at any time relevant to the host, and to generate the images either synchronously or in a background process.
摘要翻译：本文描述了一种托管的预编译系统，它提供了一种在主机内部运行的托管代码实现预先编译的方法。在任何配置设置可用后，主机会在应用程序运行时触发提前编译。主机可以选择要编译的模块，何时编译它们以及在哪里持续生成的图像。在检测到模块负载时，主机可以触发预编译，为加载程序提供模块的现有预编译映像，或者什么都不做。运行时/平台验证任何主机提供的预编译映像的完整性，并提供应用程序编程接口（API），以便在映像无效并且加载失败时通知主机。该平台还提供API，让主机在与主机相关的任何时间触发二进制文件的编译，并同步或在后台进程中生成图像。

3. 发明申请

US20100211931A1 STM WITH GLOBAL VERSION OVERFLOW HANDLING 有权
标题翻译： STM与全球版本的超流量处理
公开(公告)号：US20100211931A1
公开(公告)日：2010-08-19
申请号：US12370742
申请日：2009-02-13
申请人： Yosseff Levanoni , David L. Detlefs , Weirong Zhu , Timothy L. Harris , Michael M. Magruder , Mathew B. Tolton
发明人： Yosseff Levanoni , David L. Detlefs , Weirong Zhu , Timothy L. Harris , Michael M. Magruder , Mathew B. Tolton
IPC分类号： G06F9/44
CPC分类号： G06F9/466 , G06F11/141
摘要： A software transactional memory system is provided with overflow handling. The system includes a global version counter with an epoch number and a version number. The system accesses the global version counter prior to and subsequent to memory accesses of transactions to validate read accesses of the transaction. The system includes mechanisms to detect global version number overflow and may allow some or all transactions to execute to completion subsequent to the global version number overflowing. The system also provides publication, privatization, and granular safety properties.
摘要翻译：软件事务内存系统提供溢出处理。该系统包括具有时代号和版本号的全局版本计数器。系统在事务的内存访问之前和之后访问全局版本计数器，以验证事务的读取访问。该系统包括检测全局版本号溢出的机制，并且可允许一些或所有事务在全球版本号码溢出之后执行完成。该系统还提供出版物，私有化和粒状安全属性。

4. 发明申请

US20090328019A1 DETECTING RACE CONDITIONS WITH A SOFTWARE TRANSACTIONAL MEMORY SYSTEM 有权
标题翻译：用软件交易记忆系统检测环境条件
公开(公告)号：US20090328019A1
公开(公告)日：2009-12-31
申请号：US12163902
申请日：2008-06-27
申请人： David L. Detlefs , Michael M. Magruder , Yosseff Levanoni
发明人： David L. Detlefs , Michael M. Magruder , Yosseff Levanoni
IPC分类号： G06F9/45
CPC分类号： G06F8/443 , G06F11/3624
摘要： A dynamic race detection system is provided that detects race conditions in code that executes concurrently in a computer system. The dynamic race detection system uses a modified software transactional memory (STM) system to detect race conditions. A compiler converts portions of the code that are not configured to operate with the STM system into pseudo STM code that operates with the STM system. The dynamic race detection system detects race conditions in response to either a pseudo STM transaction in the pseudo STM code failing to validate when executed or an actual STM transaction failing to validate when executed because of conflict with a concurrent pseudo STM transaction.
摘要翻译：提供了一种动态竞争检测系统，其检测在计算机系统中并发执行的代码中的竞争条件。动态竞争检测系统使用修改后的软件事务存储器（STM）系统来检测竞争条件。编译器将未配置为与STM系统一起运行的代码部分转换为与STM系统一起运行的伪STM代码。动态竞争检测系统响应于伪STM代码中的伪STM事务在执行时无法验证或由于与并发的伪STM事务冲突而被执行时实际的STM事务失败而检测到竞争条件。

5. 发明申请

US20090328018A1 OPTIMIZING PRIMITIVES IN SOFTWARE TRANSACTIONAL MEMORY 有权
标题翻译：软件交易记忆中的优化原则
公开(公告)号：US20090328018A1
公开(公告)日：2009-12-31
申请号：US12163284
申请日：2008-06-27
申请人： David L. Detlefs , Michael M. Magruder , Yosseff Levanoni , Vinod K. Grover
发明人： David L. Detlefs , Michael M. Magruder , Yosseff Levanoni , Vinod K. Grover
IPC分类号： G06F9/45
CPC分类号： G06F8/443
摘要： A compiler is provided that determines when the use of software transactional memory (STM) primitives may be optimized with respect to a set of collectively dominating STM primitives. The compiler analysis coordinates the use of variables containing possible shadow copy pointers to allow the analysis to be performed for both direct write and buffered write STM systems. The coordination of the variables containing the possible shadow copy pointers ensures that the results of STM primitives are properly reused. The compiler analysis identifies memory accesses where STM primitives may be eliminated, combined, or substituted for lower overhead STM primitives.
摘要翻译：提供了一种编译器，其确定何时可以相对于一组统一主导的STM原语来优化软件事务存储器（STM）原语的使用。编译器分析协调使用包含可能的卷影复制指针的变量，以便对直写和缓冲写STM系统执行分析。包含可能的卷影复制指针的变量的协调确保了STM原语的结果被适当重复使用。编译器分析识别存储器访问，其中STM原语可以被消除，组合或代替较低开销的STM原语。

6. 发明申请

US20090327636A1 COMPRESSED TRANSACTIONAL LOCKS IN OBJECT HEADERS 有权
标题翻译：对象头部压缩的交互锁
公开(公告)号：US20090327636A1
公开(公告)日：2009-12-31
申请号：US12163788
申请日：2008-06-27
申请人： David L. Detlefs , Vinod K. Grover , Yosseff Levanoni , Michael M. Magruder
发明人： David L. Detlefs , Vinod K. Grover , Yosseff Levanoni , Michael M. Magruder
IPC分类号： G06F12/14 , G06F17/30
CPC分类号： G06F9/466
摘要： A software transactional memory system is provided that generates and stores compressed transactional locks in a portion of object headers. The software transactional memory system allocates preferred write log memory with a predefined size of memory that corresponds to a number of bits in the compressed transactional locks. The compressed transactional locks identify write log entries in corresponding write logs in the preferred write log memory. If the preferred write log memory becomes full, additional write log memory is allocated for write log entries and subsequent transactional locks are stored uncompressed in an auxiliary memory. A pointer that may be used to locate the uncompressed transactional lock is stored in the header. If an object header with a compressed transactional lock is needed for another use, the compressed transactional lock is uncompressed and stored in the auxiliary memory. A pointer that may be used to locate the uncompressed transactional lock is stored in the header.
摘要翻译：提供了一种软件事务存储器系统，其在对象头部的一部分中生成并存储压缩事务锁。软件事务存储系统将优选的写日志存储器与对应于压缩事务锁中的多个位的预定义大小的存储器分配。压缩事务锁在首选写入日志存储器中的相应写入日志中标识写入日志条目。如果首选的写入日志内存已满，则会为写入日志条目分配额外的写入日志内存，而后续的事务锁存在未压缩的辅助存储器中。可用于定位未压缩事务锁的指针存储在标题中。如果需要具有压缩事务锁定的对象标头进行另一次使用，压缩事务锁将被解压缩并存储在辅助存储器中。可用于定位未压缩事务锁的指针存储在标题中。

7. 发明授权

US07636745B1 Concurrent-marking-initiation heuristic 有权
标题翻译：并发标记启动启发式
公开(公告)号：US07636745B1
公开(公告)日：2009-12-22
申请号：US10986401
申请日：2004-11-11
申请人： David L. Detlefs
发明人： David L. Detlefs
IPC分类号： G06F17/30 , G06F13/00
CPC分类号： G06F13/385 , Y10S707/99931 , Y10S707/99957
摘要： A garbage collector uses the results a whole-heap marking operation to select collection sets for subsequent collection. It repeatedly calculates a measure of the cumulative collection efficiency since the marking operation, and it initiates another marking operation when the cumulative efficiency begins to deteriorate.
摘要翻译：垃圾回收器使用结果进行全堆标记操作来选择收集集以供后续收集。它反复计算出自标记操作以来的累积收集效率的量度，并且当累积效率开始恶化时，它开始另一个标记操作。

8. 发明授权

US07599973B2 Method and apparatus for decreasing object copying by a generational, copying garbage collector 有权
标题翻译：复制垃圾收集器，用于减少对象复制的方法和装置
公开(公告)号：US07599973B2
公开(公告)日：2009-10-06
申请号：US11331376
申请日：2006-01-12
申请人： David L. Detlefs , Antonios Printezis , Steven K. Heller
发明人： David L. Detlefs , Antonios Printezis , Steven K. Heller
IPC分类号： G06F12/00
CPC分类号： G06F12/0276 , Y10S707/99957
摘要： In a generational, copying garbage collector, young generation collection may be made more efficient by dynamically measuring object survival rates as a function of “fine-grained” allocation age, and choosing, on the basis of these survival rates, part of the young generation that will be not be collected, but instead scanned for pointers to objects in the rest of the young generation. The rest of the young generation, including objects referenced by the pointers, is then collected.
摘要翻译：在一代人复制垃圾收集器中，年轻一代的收集可以通过动态地测量对象存活率作为“细粒度”分配年龄的函数而变得更有效率，并且基于这些存活率来选择年轻一代的一部分这将不被收集，而是扫描指向其他年轻一代的对象的指针。然后收集年轻一代的其余部分，包括指针引用的对象。

9. 发明授权

US07287049B1 Tracking minimum mutator utilization (MMU) constraints in a garbage-collection system 有权
标题翻译：跟踪垃圾收集系统中的最小变异器利用率（MMU）约束
公开(公告)号：US07287049B1
公开(公告)日：2007-10-23
申请号：US10879332
申请日：2004-06-29
申请人： Antonios Printezis , David L. Detlefs
发明人： Antonios Printezis , David L. Detlefs
IPC分类号： G06F17/30
CPC分类号： G06F12/0253 , G06F11/3419 , G06F2201/81 , G06F2201/885 , Y10S707/99957
摘要： A garbage collector keeps a log of recent system usage. From that usage thus recorded, it determines whether a time slice whose duration a maximum-mutator-utilization (“MMU”) specification prescribes and whose end time is the same as a prospective future collection pause will contain more than the maximum imposed by the MMU specification on the time slice's garbage collector time. The collector uses that determination to arrive at a compliant length for a pause that is to start at a predetermined time or to find a time at which a pause of a predetermined length can start without violating the MMU specification.
摘要翻译：垃圾收集器保存最近系统使用的日志。根据这样记录的用途，它确定其持续时间最大突变器利用率（“MMU”）规范所规定的时间片段以及其结束时间是否与未来的收集暂停相同将包含超过MMU施加的最大值时间片上垃圾收集器时间的规范。收集器使用该确定来达到在预定时间开始的暂停的顺应长度，或者找到预定长度的暂停可以在不违反MMU规范的情况下开始的时间。

10. 发明授权

US07058781B2 Parallel card table scanning and updating 有权
标题翻译：并行卡表扫描和更新
公开(公告)号：US07058781B2
公开(公告)日：2006-06-06
申请号：US10366959
申请日：2003-02-14
申请人： David L. Detlefs
发明人： David L. Detlefs
IPC分类号： G06F12/00
CPC分类号： G06F12/0276 , Y10S707/99953 , Y10S707/99957
摘要： During a collection interval, if a multi-threaded generational, copying garbage collector finds that a card contains a reference to a younger generation, it gives a corresponding card table entry a youngergen value selected from a plurality of youngergen values at the beginning of the interval as the “current” youngergen value. The youngergen value chosen for a given collection interval differs from the one that was chosen for the previous collection interval. As a result, a collector thread is able to distinguish between a card in which a reference to the younger generation remained at the end of the previous interval and one identified by some other thread during the current interval as referring to a young-generation object. In that way, the thread is able to avoid unnecessary scanning.
摘要翻译：在收集间隔期间，如果多线程世代复制垃圾回收器发现卡片包含对年轻一代的引用，则它给出相应的卡片表条目在间隔开始时从多个幼发生值中选择的幼年值作为“当前”年轻人的价值。为给定的收集间隔选择的年龄变化值与之前收集间隔所选择的值不同。结果，集线器线程能够区分在前一间隔结束时保持对较新一代的引用的卡和在当前时间间隔期间由指定年轻代对象的其他线程识别的卡。这样线程就能避免不必要的扫描。

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