http://www-949.ibm.com/software/rational/cafe/community/ccpp?view=blogposts Latest Blog Posts in C/C++ Café en Thu, 06 Aug 2009 16:54:35 GMT Clearspace 1.10.7 (http://jivesoftware.com/products/clearspace/) 2009-08-06T16:54:35Z en http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-parallel-multicore/2009/11/11/draft-specification-of-transactional-language-constructs-for-c Hello all, over the last year, a group of Transactional Memory experts from Sun, Intel, and IBM have been getting together every Friday to discuss how to create a uniform syntax for Transactional Memory. c++ transacational memory Wed, 11 Nov 2009 15:58:43 GMT Michael_Wong http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-parallel-multicore/2009/11/11/draft-specification-of-transactional-language-constructs-for-c 2009-11-11T15:58:43Z 3 months, 2 weeks ago http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-parallel-multicore/comment/draft-specification-of-transactional-language-constructs-for-c http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-parallel-multicore/feeds/comments?blogPostID=1230 http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-commercial/2009/10/15/demistifying-zos-include-files This is my first post on our C/C++ Cafe that has been long in coming. zos c c++ compiler-option z/os Thu, 15 Oct 2009 12:14:18 GMT VolodymyrPaprotski http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-commercial/2009/10/15/demistifying-zos-include-files 2009-10-15T12:14:18Z 1 month, 1 week ago 2 http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-commercial/comment/demistifying-zos-include-files http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-commercial/feeds/comments?blogPostID=1269 http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-scientific/2009/09/15/mass-highperformance-mathematical-function-libraries Hello -- I'm the technical leader for the IBM MASS math libraries. MASS stands for Mathematical Acceleration Subsystem, and consists of libraries of mathematical functions specifically tuned for optimum performance on various computing platforms. mass scientific numerical hpc performance elementary_functions library scalar vector simd Tue, 15 Sep 2009 17:33:20 GMT RobertEnenkel http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-scientific/2009/09/15/mass-highperformance-mathematical-function-libraries 2009-09-15T17:33:20Z 2 months, 1 week ago http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-scientific/comment/mass-highperformance-mathematical-function-libraries http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-scientific/feeds/comments?blogPostID=1258 http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-parallel-multicore/2009/08/11/ibms-alphaworks-software-transactional-memory-compiler Transactional Memory (TM) is a high level abstraction for supporting a safe mutable shared state, such that the user does not have to worry about the low-level details of locking and sharing of global resources. It is basically a class of optimistic transactional_memory stm amino concurrency building blocks c/c++ Tue, 11 Aug 2009 17:02:44 GMT Michael_Wong http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-parallel-multicore/2009/08/11/ibms-alphaworks-software-transactional-memory-compiler 2009-08-11T17:02:44Z 3 months, 2 weeks ago http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-parallel-multicore/comment/ibms-alphaworks-software-transactional-memory-compiler http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-parallel-multicore/feeds/comments?blogPostID=1231 http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-commercial/2009/07/25/abuse-of-the-ansi-c-aliasing-rules So many times we get clients complaining to us that their code used to work on an older release but it's broken using the new release of the compiler. After closer look at the sample test case provided, we find out they have been lucky to have a ansi aliasing c zos optimization ansialias noansialias flag info Sat, 25 Jul 2009 16:00:21 GMT Visda http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-commercial/2009/07/25/abuse-of-the-ansi-c-aliasing-rules 2009-07-25T16:00:21Z 7 months, 1 week ago http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-commercial/comment/abuse-of-the-ansi-c-aliasing-rules http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-commercial/feeds/comments?blogPostID=1188 http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-commercial/2009/07/25/a-quick-one-on-searchnosearch I think this option's name, (especially the negative one), is pretty confusing. Be that as it may, NOSEARCH wipes out all the previous search specifications and SEARCH sets them. zos options search nosearch metal genasm Sat, 25 Jul 2009 15:58:29 GMT Visda http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-commercial/2009/07/25/a-quick-one-on-searchnosearch 2009-07-25T15:58:29Z 4 months, 1 day ago 1 http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-commercial/comment/a-quick-one-on-searchnosearch http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-commercial/feeds/comments?blogPostID=1227 http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-parallel-multicore/2009/05/27/the-view-trip-report-from-boostcon09 I apologize for lack of updates recently as an addition to the family has kept me hopping. c++ boost boostcon conference cmake transactional_memory parallel_programming Thu, 28 May 2009 00:47:16 GMT Michael_Wong http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-parallel-multicore/2009/05/27/the-view-trip-report-from-boostcon09 2009-05-28T00:47:16Z 6 months, 2 days ago 2 http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-parallel-multicore/comment/the-view-trip-report-from-boostcon09 http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-parallel-multicore/feeds/comments?blogPostID=1203 http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-market/2009/05/21/cccobol-ide-for-aix As a software developer, it's a challenge finding the right Integrated Development Environment(IDE). IBM is working on an exciting new concept in developing applications for the AIX operating system. c/c++ cobol c c++ aix ide Thu, 21 May 2009 19:55:42 GMT mikeberger http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-market/2009/05/21/cccobol-ide-for-aix 2009-05-21T19:55:42Z 6 months, 6 days ago http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-market/comment/cccobol-ide-for-aix http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-market/feeds/comments?blogPostID=1201 http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-market/2009/04/30/virtual-loaner-program-may-be-answer-to-costeffective-compiler-evaluation Are you getting the most performance from your IBM hardware investment? Using an up-to-date compiler is key to hardware exploitation. A no-charge, 60-day evaluation copy of the latest IBM XL C/C++ compiler is downloadable from www.ibm.com, but how can virtual_loaner_program evaluation vlp Thu, 30 Apr 2009 17:58:42 GMT ryou http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-market/2009/04/30/virtual-loaner-program-may-be-answer-to-costeffective-compiler-evaluation 2009-04-30T17:58:42Z 6 months, 3 weeks ago 2 http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-market/comment/virtual-loaner-program-may-be-answer-to-costeffective-compiler-evaluation http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-market/feeds/comments?blogPostID=1194 http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-market/2009/04/23/compiler-session-at-ibm-rational-software-conference-2009 Thu, 23 Apr 2009 04:13:45 GMT Roland_K http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-market/2009/04/23/compiler-session-at-ibm-rational-software-conference-2009 2009-04-23T04:13:45Z 7 months, 6 days ago http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-market/comment/compiler-session-at-ibm-rational-software-conference-2009 http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-market/feeds/comments?blogPostID=1190 http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-commercial/2009/04/19/toc-overflow-getting-help-from-the-xl-compilers In a couple of previous posts ( TOC Overflow: what is it, and why should you care? , Dealing with TOC overflow: the traditional approach ) I have presented the issue of TOC overflow. Now I will discuss some features of the XL compilers that can help toc aix c c++ commercial performance Mon, 20 Apr 2009 02:26:15 GMT Raul_Silvera http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-commercial/2009/04/19/toc-overflow-getting-help-from-the-xl-compilers 2009-04-20T02:26:15Z 7 months, 1 week ago 7 http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-commercial/comment/toc-overflow-getting-help-from-the-xl-compilers http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-commercial/feeds/comments?blogPostID=1189 http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-market/2009/04/17/xl-cc-and-xl-fortran-support-for-sles-11 SUSE Linux Enterprise Server 11 (SLES 11) for POWER is now available. linux Fri, 17 Apr 2009 19:13:33 GMT Roland_K http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-market/2009/04/17/xl-cc-and-xl-fortran-support-for-sles-11 2009-04-17T19:13:33Z 7 months, 1 week ago http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-market/comment/xl-cc-and-xl-fortran-support-for-sles-11 http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-market/feeds/comments?blogPostID=1187 http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-commercial/2009/03/01/volatiles-miscompiled-not-with-xl-cc-on-zos Compilers are expected to make volatiles immune to optimizations that result in incorrect access to the volatile variables e.g. reducing the load/stores, re-ordering them, and etc. c zos volatile memory-access Mon, 02 Mar 2009 03:24:07 GMT Visda http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-commercial/2009/03/01/volatiles-miscompiled-not-with-xl-cc-on-zos 2009-03-02T03:24:07Z 8 months, 3 weeks ago http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-commercial/comment/volatiles-miscompiled-not-with-xl-cc-on-zos http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-commercial/feeds/comments?blogPostID=1170 http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-commercial/2009/02/05/metal-c-compiler-option-in-zos Assembly language is powerful. It is close to the underlying hardware architecture; it allows you to access low level system features, interacting closely with the operating system; and it has no runtime dependencies. In short, it allows you to do almost Thu, 05 Feb 2009 16:43:31 GMT raym http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-commercial/2009/02/05/metal-c-compiler-option-in-zos 2009-02-05T16:43:31Z 9 months, 3 weeks ago 2 http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-commercial/comment/metal-c-compiler-option-in-zos http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-commercial/feeds/comments?blogPostID=1152 http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-parallel-multicore/2009/01/25/where-is-opencl-and-openmp-headed The following is a a private communication from an IBM engineer Matthew Markland who asked a great question. I do not claim great expertise but I feel that there is enough of an opinion piece that some folks may like to see this discussion or continue openmp opencl Mon, 26 Jan 2009 01:55:49 GMT Michael_Wong http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-parallel-multicore/2009/01/25/where-is-opencl-and-openmp-headed 2009-01-26T01:55:49Z 10 months, 2 days ago http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-parallel-multicore/comment/where-is-opencl-and-openmp-headed http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-parallel-multicore/feeds/comments?blogPostID=1143 http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-commercial/2009/01/23/dealing-with-toc-overflow-the-traditional-approach In a previous posting ( TOC Overflow: what is it, and why should you care? ) I discussed the TOC overflow condition, which is common when developing large commercial applications on AIX. toc ipa Fri, 23 Jan 2009 14:41:40 GMT Raul_Silvera http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-commercial/2009/01/23/dealing-with-toc-overflow-the-traditional-approach 2009-01-23T14:41:40Z 1 year, 1 week ago 6 http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-commercial/comment/dealing-with-toc-overflow-the-traditional-approach http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-commercial/feeds/comments?blogPostID=1075 http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-commercial/2009/01/11/rent-or-norent Here we are eleven days into a new year; and I would like to wish all of you a happy belated 2009! May this be a year of making technology less complex, more intuitive, friendlier and greener. rent norent zos c c++ commercial performance compiler-option Sun, 11 Jan 2009 20:45:24 GMT Visda http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-commercial/2009/01/11/rent-or-norent 2009-01-11T20:45:24Z 10 months, 2 weeks ago http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-commercial/comment/rent-or-norent http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-commercial/feeds/comments?blogPostID=1138 http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-parallel-multicore/2009/01/05/opencl-10-released One of the most important thing that happened in the last month of 2008, was the release of the OpenCL specification by Khronos: opencl cell Mon, 05 Jan 2009 14:22:06 GMT Michael_Wong http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-parallel-multicore/2009/01/05/opencl-10-released 2009-01-05T14:22:06Z 10 months, 3 weeks ago 1 http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-parallel-multicore/comment/opencl-10-released http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-parallel-multicore/feeds/comments?blogPostID=1136 http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-commercial/2008/12/23/toc-overflow-what-is-it-and-why-should-you-care When building large applications on AIX or pSeries Linux you may have experienced the dreaded TOC overflow. This is a situation reported the system linker that causes it to abort and fail to generate an executable. c c++ commercial aix linux Tue, 23 Dec 2008 16:27:05 GMT Raul_Silvera http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-commercial/2008/12/23/toc-overflow-what-is-it-and-why-should-you-care 2008-12-23T16:27:05Z 11 months, 2 weeks ago http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-commercial/comment/toc-overflow-what-is-it-and-why-should-you-care http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-commercial/feeds/comments?blogPostID=1125 http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-parallel-multicore/2008/12/12/how-does-openmp-30-work-better-with-c-part-3 Let's get to the good stuff. OpenMP 2.5 did not really specify what constructors should be called with various private/first/lastprivate/threadprivate: openmp c++ Fri, 12 Dec 2008 05:33:06 GMT Michael_Wong http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-parallel-multicore/2008/12/12/how-does-openmp-30-work-better-with-c-part-3 2008-12-12T05:33:06Z 11 months, 2 weeks ago http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-parallel-multicore/comment/how-does-openmp-30-work-better-with-c-part-3 http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-parallel-multicore/feeds/comments?blogPostID=1124 http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-parallel-multicore/2008/12/08/openmp-at-supercomputing-08 The OpenMP Birds-of-a-Feather session at SC08 was very well attended. The room was full to overflowing, with approximately 60-80 people. while OpenMP had BOFs at SC in prior years, this is actually the first year that OpenMP has had a Booth on the openmp supercomputing bofs Mon, 08 Dec 2008 15:16:30 GMT Michael_Wong http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-parallel-multicore/2008/12/08/openmp-at-supercomputing-08 2008-12-08T15:16:30Z 1 year, 3 days ago http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-parallel-multicore/comment/openmp-at-supercomputing-08 http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-parallel-multicore/feeds/comments?blogPostID=1092 http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-commercial/2008/12/07/high-performance-a-balancing-act- Dual cores have become household products, yet we see little change in the performance of the application that run on these machines. Just this morning, I started Firefox and Lotus Notes at the same time on my dual core T60p laptop, and had to wait a performance c c++ z/os commercial loop-unroll Sun, 07 Dec 2008 23:44:48 GMT Visda http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-commercial/2008/12/07/high-performance-a-balancing-act- 2008-12-07T23:44:48Z 11 months, 3 weeks ago http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-commercial/comment/high-performance-a-balancing-act- http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-commercial/feeds/comments?blogPostID=1117 http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-parallel-multicore/2008/12/03/how-does-openmp-30-work-better-with-c This was one of the question asked at SC 08. I will try to answer that here. I will start and add more as I move through the various topics. openmp c++0x memory_model Thu, 04 Dec 2008 02:51:20 GMT Michael_Wong http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-parallel-multicore/2008/12/03/how-does-openmp-30-work-better-with-c 2008-12-04T02:51:20Z 12 months, 2 days ago http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-parallel-multicore/comment/how-does-openmp-30-work-better-with-c http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-parallel-multicore/feeds/comments?blogPostID=1104 http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-parallel-multicore/2008/11/28/how-does-openmp-30-work-better-with-c-part-2 This part will talk about enabling threadprivatization of static class member variables. openmp c++ Fri, 28 Nov 2008 17:04:13 GMT Michael_Wong http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-parallel-multicore/2008/11/28/how-does-openmp-30-work-better-with-c-part-2 2008-11-28T17:04:13Z 12 months, 9 hours ago http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-parallel-multicore/comment/how-does-openmp-30-work-better-with-c-part-2 http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-parallel-multicore/feeds/comments?blogPostID=1106 http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-market/2008/11/27/announcing-xl-cc-for-multicore-acceleration-v101 Today, IBM announced two new C/C++ products designed to exploit the unique performance capabilities offered by the hybrid Cell Broadband Engine processor architecture. They are: c/c++ Thu, 27 Nov 2008 16:23:32 GMT Roland_K http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-market/2008/11/27/announcing-xl-cc-for-multicore-acceleration-v101 2008-11-27T16:23:32Z 12 months, 3 days ago http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-market/comment/announcing-xl-cc-for-multicore-acceleration-v101 http://www-949.ibm.com/software/rational/cafe/blogs/ccpp-market/feeds/comments?blogPostID=1100