公开(公告)号：WO2008154191A2

公开(公告)日：2008-12-18

申请号：PCT/US2008/065376

申请日：2008-05-30

Applicant: MICROSOFT CORPORATION

Inventor： GRAY, Jan ,  HARRIS, Timothy, L. ,  LARUS, James ,  SMITH, Burton

IPC: G06F12/00

CPC classification number: G06F9/467 ,  G06F9/3004 ,  G06F9/30047 ,  G06F9/30087 ,  G06F9/3834 ,  G06F9/3859 ,  G06F12/0808 ,  G06F12/0842 ,  G06F2212/1016 ,  G06F2212/466 ,  G06F2212/507

Abstract: Various technologies and techniques are disclosed for providing a bounded transactional memory application that accesses cache metadata in a cache of a central processing unit. When performing a transactional read from the bounded transactional memory application, a cache line metadata transaction-read bit is set. When performing a transactional write from the bounded transactional memory application, a cache line metadata transaction-write bit is set and a conditional store is performed. At commit time, if any lines marked with the transaction-read bit or the transaction-write bit were evicted or invalidated, all speculatively written lines are discarded. The application can also interrogate a cache line metadata eviction summary to determine whether a transaction is doomed and then take an appropriate action.

Abstract translation: 公开了各种技术和技术，用于提供访问中央处理单元的高速缓存中的高速缓存元数据的有界事务存储器应用。 当从有界事务存储器应用程序执行事务读取时，设置缓存行元数据事务读取位。 当从有界事务存储器应用程序执行事务写入时，设置高速缓存行元数据事务写入位并执行条件存储。 在提交时，如果任何标有事务读取位或事务写入位的行被驱逐或无效，则所有推测写入的行都将被丢弃。 应用程序还可以询问高速缓存行元数据驱逐摘要以确定事务是否注定失败，然后采取适当的操作。

公开(公告)号：WO2008154192A3

公开(公告)日：2008-12-18

申请号：PCT/US2008/065378

申请日：2008-05-30

Applicant: MICROSOFT CORPORATION

Inventor： GRAY, Jan ,  HARRIS, Timothy, L. ,  LARUS, James ,  SMITH, Burton

IPC: G06F13/00 ,  G06F12/00

Abstract: Various technologies and techniques are disclosed for providing a hardware accelerated software transactional memory application. The software transactional memory application has access to metadata in a cache of a central processing unit that can be used to improve the operation of the STM system. For example, open read barrier filtering is provided that uses an opened-for-read bit that is contained in the metadata to avoid redundant open read processing. Similarly, redundant read log validation can be avoided using the metadata. For example, upon entering commit processing for a particular transaction, a get-evictions instruction in an instruction set architecture of the central processing unit is invoked. A retry operation can be optimized using the metadata. The particular transaction is aborted at a current point and put to sleep. The corresponding cache line metadata in the metadata are marked appropriately to efficiently detect a write by another CPU.