Ultimately, software depends upon strong guarantees for atomicity, which can only be provided by hardware. Fortunately, hardware can provide a simple but powerful programming interface to higher-level software using only a few synchronization primitives. These few primitives can support a surprisingly ...
Searching for similarities in protein and DNA databases has become a routine procedure in Molecular Biology. The Smith-Waterman algorithm has been available for more than 25 years. It is based on a dynamic programming approach that explores all the possi
This example may seem artificial, but using two synchronization variables does happen in well-known synchronization algorithms, such asDekker's algorithmorPeterson's algorithm, as well as ad hoc schemes. They break if one thread isn’t seeing all the writes from another. 这个例子似乎是人为的,但...
take advantage of race conditions on speculatively executed code paths. The research shows that synchronization primitives implemented using conditional branches at the OS level can be bypassed on speculative paths using a Spectre v1 attack, potentially allowing for information leaks from targeted sof...
As for new hardware primitives. Well, it would be interesting to see what HTM can afford to us. It seems that HTM is the nearest approaching addition to hardware wrt synchronization. Sun must push HTM to the market in the 2008. And it seems that AMD is seriously working on...
Chisel is a hardware design language that facilitates advanced circuit generation and design reuse for both ASIC and FPGA digital logic designs. Chisel adds hardware construction primitives to the Scala programming language, providing designers with the power of a modern programming language to write com...
Hardware-SoftwareTrade-offsinSynchronizationCS252,Spring05DavidE.CullerComputerScienceDivisionU.C.Berkeley12/26/2014CS252S052RoleofSynchronization•“Aparallelcomputerisacollectionofprocessingelementsthatcooperateandcommunicatetosolvelargeproblemsfast.”•TypesofSynchronization–MutualExclusion–Eventsynchronization»po...
For example, on the x86 architecture, wmb( ) currently does nothing, since writes outside the processor are not reordered. Reads are reordered, however, so mb( ) is slower than wmb( ). It is worth noting that most of the other kernel primitives dealing with synchronization, such as ...
Summary of Windows Synchronization Primitives Supporting Systems That Have More Than 64 Processors Using a device object namespace instead of a bus driver Watchdog timer hardware requirements for Windows Touch, Input, and HID Virtualization Windows Color System ...
While most driver operations can be performed without mechanisms for synchronization and protection beyond those provided by the locking primitives, some devices require that a sequence of events occur in order without interruption. In conjunction with the locking primitives, the functionddi_enter_critical...