Memory race recorder. These approaches are challenging to .

Memory race recorder. Expand View on ACM justingottschlich. Modern computers supply efficient communication mechanism and memory races occur frequently. We focus on memory race recording for three reasons. Aug 1, 2012 · This paper proposes a new efficient point-to-point memory race recording algorithm, called CCTR, which writes a small race log with small hardware state, operates well as the number of cores per system scales, and can replay multithreaded programs at production run speed. To address this issue, many hardware-based memory race recorders have been proposed that efficiently log an ordering of the shared memory interleavings between threads for deterministic replay. These approaches are challenging to Memory race recording has been proved to be a hard problem in multithreaded deterministic record-replay. Disclosed herein are processors with memory race recorder logic to record thread interleaving and/or shared memory access patterns during the execution of multi-threaded software. This paper proposes a new efficient point-to-point memory race recording Disclosed herein are processors with memory race recorder logic to record thread interleaving and/or shared memory access patterns during the execution of multi-threaded software. These memory race recorder (MRR) techniques are effective, but they require modifications to the cache coherence protocol that can hurt performance. However, most of the prior work tries to record all memory conflicts, whether they affect deterministic replay or not, resulting a relatively large memory race log. In addition, prior work has mostly focused on directory coherence and considered only CMP systems with single-level cache hierarchies. In this paper, we improve FDR’s memory race recording with significant reduction in the log size and hardware cost. CoreRacer, a chunk-based memory race recorder architecture for multicore x86 TSO processors, is described and it is shown that by leveraging a specific x86 feature, the invariant timestamp, CoreRacer maintains ordering among chunks without piggybacking on cache coherence messages. The log size of FDR’s memory race recorder is approximately 2 MB/1GHz-processor/second (compressed). This module is shown in the top right part of Figure 4. 1)Race recording limited FDR. It is important to develop an efficient memory race recording algorithm. SAMR analyzes memory conflicts introduced by synchronization operations and classifies them into harmful synchronization conflicts and harmless synchronization conflicts. com Save to Library Create Alert Cite Shared memory multiprocessors are difficult to program because of the non-deterministic ways in which the memory operations from different threads interleave. This paper proposes an innovative synchronization . 6 (a). Although there are practical solutions for the first two problems, existing designs for memory race recorders have highly complex hardware and significant runtime overhead. Practical memory race recording thus holds the key to making recorders viable. This paper proposes an innovative synchronization aware point-to-point memory race recorder, called SAMR. Dec 3, 2011 · This paper presents the first complete solution for hard-ware-assisted memory race recording that works for any relaxed-consistency model of current processors. Aug 1, 2012 · Memory race recording is a key technology to replay multithreaded programming deterministically. So it is significant to develop an efficient memory race recording algorithm with low log growth rate and rapid replay speed. Following previous RnR designs, we place the hardware for recording memory races in a per-processor Memory Race Recorder (MRR) module. A processor includes a first core to execute a first software thread, a second core to execute a second software thread, and shared memory access monitoring and recording logic. ugxn1 sud ddkuph t0 qgei qom npg5 ow vjo oq1a