Dhrystone is a synthetic computing benchmark program developed in 1984 by Reinhold P. Weicker intended to be representative of system programming; the Dhrystone grew to become representative of general processor performance. The name "Dhrystone" is a pun on a different benchmark algorithm called Whetstone. With Dhrystone, Weicker gathered meta-data from a broad range of software, including programs written in FORTRAN, PL/1, SAL, ALGOL 68, Pascal, he characterized these programs in terms of various common constructs: procedure calls, pointer indirections, etc. From this he wrote the Dhrystone benchmark to correspond to a representative mix. Dhrystone was published in Ada, with the C version for Unix developed by Rick Richardson contributing to its popularity; the Dhrystone benchmark contains no floating point operations, thus the name is a pun on the then-popular Whetstone benchmark for floating point operations. The output from the benchmark is the number of Dhrystones per second. Both Whetstone and Dhrystone are synthetic benchmarks, meaning that they are simple programs that are designed to statistically mimic the processor usage of some common set of programs.
Whetstone, developed in 1972 strove to mimic typical Algol 60 programs based on measurements from 1970, but became most popular in its Fortran version, reflecting the numerical orientation of computing in the 1960s. Dhrystone's eventual importance as an indicator of general-purpose performance of new computers made it a target for commercial compiler writers. Various modern compiler static code analysis techniques make the use and design of synthetic benchmarks more difficult. Version 2.0 of the benchmark, released by Weicker and Richardson in March 1988, had a number of changes intended to foil a range of compiler techniques. Yet it was crafted so as not to change the underlying benchmark; this effort to foil compilers was only successful. Dhrystone 2.1, released in May of the same year, had some minor changes and as of July 2010 remains the current definition of Dhrystone. Other than issues related to compiler optimization, various other issues have been cited with the Dhrystone. Most of these, including the small code size and small data set size, were understood at the time of its publication in 1984.
More subtle is the slight over-representation of string operations, language-related: both Ada and Pascal have strings as normal variables in the language, whereas C does not, so what was simple variable assignment in reference benchmarks became buffer copy operations in the C library. Another issue is that the score reported does not include information, critical when comparing systems such as which compiler was used, what optimizations. Dhrystone remains remarkably resilient as a simple benchmark, but its continuing value in establishing true performance is questionable, it is easy to use, well documented self-contained, well understood, can be made to work on any system. In particular, it has remained in broad use in the embedded computing world, though the developed EEMBC benchmark suite, HINT, Bytemark are quoted and used, as well as more specific benchmarks for the memory subsystem, TCP/IP, many others. Dhrystone may represent a result more meaningfully than MIPS because instruction count comparisons between different instruction sets can confound simple comparisons.
For example, the same high-level task may require many more instructions on a RISC machine, but might execute faster than a single CISC instruction. Thus, the Dhrystone score counts only the number of program iteration completions per second, allowing individual machines to perform this calculation in a machine-specific way. Another common representation of the Dhrystone benchmark is the DMIPS obtained when the Dhrystone score is divided by 1757. Another way to represent results is in DMIPS/MHz, where DMIPS result is further divided by CPU frequency, to allow for easier comparison of CPUs running at different clock rates. Using Dhrystone as a benchmark has pitfalls: It features unusual code, not representative of real-life programs, it is susceptible to compiler optimizations. For example, it does a lot of string copying in an attempt to measure string copying performance. However, the strings in Dhrystone are of known constant length and their starts are aligned on natural boundaries, two characteristics absent from real programs.
Therefore, an optimizer can replace a string copy with a sequence of word moves without any loops, which will be much faster. This optimization overstates system performance, sometimes by more than 30%. Dhrystone's small code size may fit in the instruction cache of a modern CPU, so that instruction fetch performance is not rigorously tested. Geekbench CoreMark "Dhrystone results for Unix machines". Archived from the original on 2015-10-02. Newsgroup posting for calculation of DMIPS C version of Dhrystone in a sh file Self configuring and compiling version. Comments on Benchmark pitfalls. Set 8, Slide 11, page 95 Dhrystone Benchmark Results On PCs Source code and C/C++ pre-compiled versions for PCs iOS pre-compiled version for iPhones
Kenshiro Matsunami is a Japanese politician of the Liberal Democratic Party, a member of the House of Representatives in the Diet. A native of Izumisano, Osaka, he attended Nippon Sport Science University, Eastern Michigan University and Nihon University, he was elected to the House of Representatives for the first time in 1996 as a member of the New Frontier Party. After losing his seat in 2003, he was re-elected in 2005. 政治家情報 〜松浪 健四郎〜. ザ･選挙. JANJAN. Archived from the original on 2007-10-25. Retrieved 2007-10-13. Official website in Japanese
Saint Andrew is one of eleven parishes of Barbados. It is situated. Saint Andrew is one of the more unspoiled parts of the island owing to its physical makeup of green rolling hills; the parish of Saint Andrew has the country's highest natural elevation, the 336 m Mount Hillaby at the southern part of the parish. The parish is named after the patron saint, Saint Andrew, the basis of the name for Barbados' highest national award "The Order of Saint Andrew" and the shape of the cross formed by two sugar cane stalks in the national Coat of Arms of Barbados. During the colonial years under Britain, the British thought the area resembled the hills and fields of Scotland; this led to parts of the Parish of Saint Andrew today being nicknamed the "Scotland District". During the 1990s the Government of the time proposed a "Greenland Landfill" located within the parish. However, because of Saint Andrew's fragile environment and its possibility of future soil erosion the opening of the completed landfill has yet to come-about after a decade.
Saint Andrew lies on the eastern coastline of Barbados, where the Atlantic Ocean tends to be more turbulent. As part of Barbados' attempts to preserve the environment the parish is home to several natural reserves including the Turner's Hall Woods; the parish contains the following towns, localities, settlements and hamlets: Saint James - West Saint Joseph - Southeast Saint Peter - North Saint Thomas - South with St. James: – Starting from the meeting point of the parishes of St. Peter, St. James and St. Andrew; this is the meeting point of the parishes of St. Andrew and St. Thomas. With St. Joseph: – Starting from the meeting point of the parishes of St. Andrew, St. Thomas and St. Joseph and proceeding north-easterly along Highway 2 to the junction with the public road known as Coggins Hill. With St. Peter: – Starting from the meeting point of the parishes of St. Peter, St. James and St. Andrew and continuing in an easterly direction to its junction with the public road leading from Rock Hall Plantation to Rock Hall Village: in a north-westerly direction along this public road to its junction at Rock Hall Tenantry with a track leading to Roebuck Village.
With St. Thomas: – Starting from the meeting point of the parishes of St. James, St. Andrew and St. Thomas and proceeding along the gully leading in a south-easterly direction to a point in line with the tenantry road at Hillaby Village; this is the meeting point of the parishes of St. Thomas and St. Joseph. Edna Ermyntrude Bourne - first woman to be elected to the House of Assembly of Barbados, representing Saint Andrew
Charles Alexander Weibel is an American mathematician working on algebraic K-theory, algebraic geometry and homological algebra. Weibel studied physics and mathematics at the University of Michigan, earning bachelor's degrees in both subjects in 1972, he was awarded a master's degree by the University of Chicago in 1973 and achieved his doctorate in 1977 under the supervision of Richard Swan. From 1970 to 1976 he was an "Operations Research Analyst" at Standard Oil in Indiana, spent 1977–78 at the Institute for Advanced Study. In 1978 he became an assistant professor at the University of Pennsylvania and in 1980 an assistant professor at Rutgers University, where he was promoted to professor in 1989, he joined Markus Rost in proving the Bloch -- Kato conjecture. It is a generalization of the Milnor conjecture of algebraic K-theory, proved by Voevodsky in the 1990s, he was a visiting professor in 1992 at the University of Paris and 1993 at the University of Strasbourg. Since 1983 he has been an editor of the Journal of Applied Algebra.
In 2014, he became a Fellow of the American Mathematical Society. With Eric Friedlander, An overview over algebraic K-theory, in Algebraic K-theory and its applications, World Scientific 1999, pp. 1–119 The K-Book, an introduction to algebraic K-theory With Carlo Mazza, Vladimir Voevodsky Lectures on Motivic Cohomology, Clay Monographs in Mathematics, American Mathematical Society 2006 An introduction to homological algebra, Cambridge University Press 1994 The proof of the Bloch-Kato conjecture, Trieste Lectures 2007, ICTP Lecture Notes Series 23, 277–305 The original article was a Google translation of the corresponding article in German Wikipedia. Charles Weibel at the Mathematics Genealogy Project Homepage
Lee Harris is a former pair skater who competed internationally for the United States. With partner Colette Appel, he is the 2002 U. S. national junior placed 12th at the 2002 World Junior Championships. They were fourth at two ISU Junior Grand Prix events and on the senior level at the 2003 Finlandia Trophy. In 2006, Harris began his professional skating career while on tour with Royal Caribbean Cruise ships, he retired from professional skating in 2011 and he coaches at the Chiller Skating Rinks in Columbus, Ohio. In 2012 and 2013 Harris became a National Level Figure Skating Coach when his Novice pair team competed at the U. S. National figure skating championships. Harris played Jr. Hockey for the Belle River Canadians and Kingsville Comets in the GLJCHL from 1996-1999. In 2014, Harris was hired by the Columbus Blue Jackets as their skating coach. Harris works with both their AHL affiliate team. In 2017, Harris was added onto the Ohio State Buckeyes men's ice hockey team's coaching staff as the on-ice conditioning specialist.
Colette Appel / Lee Harris at the International Skating Union Colette Appel / Lee Harris at Tracings.net Chiller Staff Page
Amy McKenzie is an American producer and actress. She is one of the founders of the Third Avenue Playhouse. McKenzie has worked and lived in Seattle, New York, Los Angeles, San Francisco, Chicago, where she has produced and performed for the stage and television, she co-founded the New Age Vaudeville theater company as well as co-producing and directing their biggest cult hits, An Evening With Elmore & Gwendolyn Putts, The Neighbors Next Door and The TV Dinner Hour, both written by Richard O’Donnell and featuring herself, O’Donnell, Megan Cavanagh, Todd Erickson, Bobby McGuire, Peter Neville, Michael Dempsey, Lisa Keefe, Caroline Schless, Tom Purcell and Del Close. Rick Kogan of the Chicago Tribune hailed both productions as "Among the most polished and clever productions of the season, a pair of devilishly inventive shows that won over critics and audiences alike."McKenzie has directed and acted in numerous productions at the Peninsula Players, America's oldest residential summer theater, as well as founding and producing their fall season in the early 1980s.
She was on the board of directors for the Peninsula Players for over a decade, was Artistic Founding Director of the Third Avenue Playhouse in Sturgeon Bay, whereby she helped to convert an old movie house into a state-of-the-art performing arts theater. In 1998, McKenzie produced and directed the new musical comedy Wish Wisconsin, written by Richard O’Donnell to celebrate the state's 150th birthday, it opened in the Fish Creek Town Hall Auditorium. Songs included "Wish", "So Blessed", the show-stopper "Oh!, Wisconsin". All credits are as producer/director. An Evening With Elmore & Gwendolyn Putts, The Neighbors Next Door The TV Dinner Hour Dr. FunnyBones’ Carnival of Life Just Visiting Wish Wisconsin History Bites McKenzie is the daughter of award-winning Broadway theatrical producer James B. McKenzie