New Intel 9.0 compilers aim at multithreaded apps

Santa Clara (CA) - Citing the need for software developers to take advantage now of the skyrocketing trend toward multicore and hyperthreaded processing, Intel Corp. announced the release of version 9.0 of its C++ and Fortran compilers. By embracing OpenMP 2.5 - the newest edition of a multiprocessing standard - the company hopes developers will create the software tools and applications that will justify its surging investment in multicore technologies.

"For a long time, most processors couldn't run more than one thread at a time," said James Reinders, a senior engineer with Intel's Tools Group, "so a lot of applications were threaded for convenience, or for the occasional opportunity to run on a multiprocessor system." As a result, added Reinders, Intel wanted to avoid a situation where they were just releasing multicore and hyperthreading CPUs to the public, while at the same time urging developers to write the first applications ever to take advantage of parallelism. If consumers couldn't see the advantages of parallelism in applications the moment dual-core and HT CPUs hit the market, there's a chance they wouldn't have sold.

With the OpenMP comments added, explained Reinders, the developer can "throw a switch on the compiler, [which] will enlighten the compiler that these loops or functions are important and should be run in parallel. That helps the compiler a great deal, to keep it from either being too conservative and not running stuff in parallel, or being too liberal and running things in parallel that don't make sense." In other words, the OpenMP comments help the compiler to isolate reiterative functions that would not benefit from parallel execution.

Although direct support has yet to materialize, the 9.0 compilers release marks the first time in Intel's history where a support program has been initiated for Apple software developers, in the wake of that company's announcement of future Intel CPU support. On Intel's Web site, Apple developers are being invited to sign up for a new developer support program, the details of which have yet to be finalized.

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