{"id":10606,"date":"2022-09-24T08:20:20","date_gmt":"2022-09-24T02:50:20","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-pgi-cuda-fortran-compiling-error\/"},"modified":"2022-09-24T08:20:20","modified_gmt":"2022-09-24T02:50:20","slug":"solved-pgi-cuda-fortran-compiling-error","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-pgi-cuda-fortran-compiling-error\/","title":{"rendered":"[Solved] pgi cuda fortran compiling error"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-29382604\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"29382604\" data-parentid=\"29309241\" data-score=\"2\" data-position-on-page=\"1\" data-highest-scored=\"1\" data-question-has-accepted-highest-score=\"1\" itemprop=\"acceptedAnswer\" itemscope itemtype=\"https:\/\/schema.org\/Answer\">\n<div class=\"post-layout\">\n<div class=\"votecell post-layout--left\"><\/div>\n<div class=\"answercell post-layout--right\">\n<div class=\"s-prose js-post-body\" itemprop=\"text\">\n<p>You&#8217;re calling this a &#8220;cuda fortran&#8221; code, but it is syntactically incorrect whether you want to ultimately run the subroutine on the host (CPU) or device (GPU).  You may wish to refer to this <a rel=\"nofollow noopener\" target=\"_blank\" href=\"http:\/\/devblogs.nvidia.com\/parallelforall\/easy-introduction-cuda-fortran\/\">blog post<\/a> as a quick start guide.<\/p>\n<p>If you want to run the subroutine <code>increment<\/code> on the GPU, you have not called it correctly:<\/p>\n<p>call increment ( a , b )<\/p>\n<p>A GPU subroutine call needs kernel launch parameters, which are contained in the &#8220;triple chevron&#8221; <code>&lt;&lt;&lt;...&gt;&gt;&gt;<\/code> syntax which should be placed between the <code>increment<\/code> and its parameter list, like so:<\/p>\n<pre><code>call increment&lt;&lt;&lt;1,1&gt;&gt;&gt; ( a , b )\n<\/code><\/pre>\n<p>and this is giving rise to the error message:<\/p>\n<blockquote>\n<p>Attempt to call global subroutine without chevrons<\/p>\n<\/blockquote>\n<p>If, instead, you intend to run this subroutine on the CPU, and are just passing it through the CUDA fortran compiler, then it is incorrect to specify the <code>global<\/code> attribute on the subroutine:<\/p>\n<pre><code>attributes (global) subroutine increment(a,b)\n<\/code><\/pre>\n<p>The following is a modification of your code which would run the subroutine on the GPU, and compiles cleanly for me with PGI 14.9 tools:<\/p>\n<pre><code>$ cat test3.cuf\nmodule simple\ncontains\n  attributes (global) subroutine increment(a,b)\n    implicit none\n    integer :: a(:)\n    integer, value :: b\n    integer :: i , n\n    n = size( a )\n    do i = 1 , n\n       a ( i ) = a ( i )+ b\n    end do\n  end subroutine increment\nend module simple\n\n\nprogram incrementTestCPU\n  use simple\n  use cudafor\n  implicit none\n  integer, parameter  :: n = 256\n  integer, device :: a_d(n), b_d\n  integer :: a ( n ) , b\n  a = 1\n  b = 3\n  a_d = a\n  b_d = b\n  call increment&lt;&lt;&lt;1,1&gt;&gt;&gt; ( a_d , b_d )\n  a = a_d\n  if ( any ( a \/= 4)) then\n     write (* ,*) \"pass\"\n  else\n     write(*,*) \"not passed\"\n  end if\nend program incrementTestCPU\n\n$ pgf90 -Mcuda -ta=nvidia,cc20,cuda6.5 -Minfo test3.cuf -o test3\nincrementtestcpu:\n     23, Memory set idiom, loop replaced by call to __c_mset4\n     29, any reduction inlined\n$ pgf90 --version\n\npgf90 14.9-0 64-bit target on x86-64 Linux -tp nehalem\nThe Portland Group - PGI Compilers and Tools\nCopyright (c) 2014, NVIDIA CORPORATION.  All rights reserved.\n$\n<\/code><\/pre>\n<p>If you are trying to create a CPU-only version, then remove <em>all<\/em> CUDA Fortran syntax from your program.  If you still have difficulty, you can ask a Fortran-directed question, as it is not a CUDA issue at that point.  As an example, the following (non-CUDA) code compiled cleanly for me:<\/p>\n<pre><code>module simple\ncontains\n  subroutine increment(a,b)\n    implicit none\n    integer, intent(inout) :: a(:)\n    integer , intent(in) :: b\n    integer :: i , n\n    n = size( a )\n    do i = 1 , n\n       a ( i ) = a ( i )+ b\n    end do\n  end subroutine increment\nend module simple\n\n\nprogram incrementTestCPU\n  use simple\n  implicit none\n  integer, parameter  :: n = 256\n  integer :: a ( n ) , b\n  a = 1\n  b = 3\n  call increment ( a , b )\n  if ( any ( a \/= 4)) then\n     write (* ,*) \"pass\"\n  else\n     write(*,*) \"not passed\"\n  end if\nend program incrementTestCPU\n<\/code><\/pre>\n<\/p><\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p>            <span class=\"d-none\" itemprop=\"commentCount\">0<\/span> <\/p><\/div>\n<\/div>\n<p>[ad_2]<\/p>\n<p>solved pgi cuda fortran compiling error <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] You&#8217;re calling this a &#8220;cuda fortran&#8221; code, but it is syntactically incorrect whether you want to ultimately run the subroutine on the host (CPU) or device (GPU). You may wish to refer to this blog post as a quick start guide. If you want to run the subroutine increment on the GPU, you have &#8230; <a title=\"[Solved] pgi cuda fortran compiling error\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-pgi-cuda-fortran-compiling-error\/\" aria-label=\"More on [Solved] pgi cuda fortran compiling error\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[943,1564,1850],"class_list":["post-10606","post","type-post","status-publish","format-standard","hentry","category-solved","tag-compiler-errors","tag-cuda","tag-fortran"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[Solved] pgi cuda fortran compiling error - JassWeb<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jassweb.com\/solved\/solved-pgi-cuda-fortran-compiling-error\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] pgi cuda fortran compiling error - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] You&#8217;re calling this a &#8220;cuda fortran&#8221; code, but it is syntactically incorrect whether you want to ultimately run the subroutine on the host (CPU) or device (GPU). 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