[PDF] Top 20 WRL TN 15 pdf

... Figure 15 shows the parallelism achieved by a quite ambitious software-style model, with static branch and jump prediction, 256 FPU and 256 CPU registers used with LRU renaming, perfect [r] ... See full document

... Although curves of average performance such as Figure 14 appear to roll off fairly smoothly, the performance for individual programs can be quite different. Figure 15 shows that the data cache line size providing ... See full document

... One combination of branch predictors that is useful is bimodal/gshare. In this com- bination, global information can be used if it is worthwhile, otherwise the usual branch direction as predicted by the bimodal scheme ... See full document

... Several studies have examined how execution from one run of a program predicts the future behavior of that program. David Wall provided an early study on predicting the future behavior of a program using profiles ... See full document

... are actually providing an effective line size that varies on a per reference basis within each program. Also note that the line size used in the stream buffer approaches is not that significant, although it is very ... See full document

... There are two subclasses of frequency domain measurements: low frequency RLC measure- ment and high frequency network analysis. Low frequency (about 1 MHz) measurements cannot detect such phenomena as ground plane ... See full document

... The silicon chip was 15 x 15 x 0.5 mm. Its top surface had a thin film of tantalum nitride with a pair of gold bus bars on opposite ends of the chip. This generated uniform heating when a voltage was ... See full document

... We are therefore in the process of porting our tracing implementation to the MIPS architec- ture, in a way that requires little kernel modification. This will allow us to trace benchmarks under several different, ... See full document

... Other forms of optimization depend on having the entire program at hand all at once. In an environment with separately-compiled modules, this may mean we must apply the optimization to machine-level code. Global ... See full document

... As expected, the power consumption during sleep mode has significantly improved on Itsy v2.4 with respect to Itsy v2.3 [Vir00], while the power consumption during idle and run modes remained essentially the same. This is ... See full document

... In early December 1988, our attention was called to work by Bill Bidermann on electroluminescence in pickles [23]. It was reported that inserting iron electrodes into a dill pickle and energizing with modest alternating ... See full document

... group. WRL was founded by Digital Equipment Corporation in ...at WRL includes Internet protocol design and implementation, tools to optimize com- piled binary code files, hardware and software mechanisms to ... See full document

... We do work in the design, fabrication and packaging of hardware; language processing and scaling issues in system software design; and the exploration of new applications areas that are opening up with the advent of ... See full document

... A new version of the WRL tracing facilities collected the traces on DECstation 5000’s running UL- TRIX [3, 4]. Its kernel-based approach traces all processes. Figure 1 shows the system configuration. The original ... See full document

... A new version of the WRL tracing facilities collected traces on DECstation 5000’s running ULTRIX [4, 5]. Its kernel-based approach traces all processes. The modified system logs system call information in a ... See full document

... We want our IIS systems to handle as high a request rate as possible, but when that rate is exceeded, we do not want them to suffer from congestive collapse or ‘‘livelock.’’ A livelocked[r] ... See full document

... The author is also indebted to the Itsy team at the Western Research Laboratory (WRL) and System Research Center (SRC): Joel Bartlett, Lawrence Brakmo, David Chaiken, Je Dean, Puneet Kumar, Bob Mayo, Sharon Perl, ... See full document

... The Western Research Laboratory (WRL) is a computer systems research group that was founded by Digital Equipment Corporation in 1982. Our focus is computer science research relevant to the design and application ... See full document

... Over the past decade three classes of tools for different machines and applications have been developed. The first class consists of basic block counting tools like Pixie[13], Epoxie[22] and QPT[11]. The second class ... See full document

... at WRL ranges from Web search engines to tools to optimize binary codes, from hard- ware and software mechanisms to support scalable shared memory paradigms to graphics VLSI ...of WRL tradition, we test our ... See full document