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Questions tagged [pgcc]

14 questions
3
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1 answer

equivalent of pgcc "-Minfo=" flag for gcc compiler?

I just discovered the nice "-Minfo=" flag in pgcc, which outputs all the optimizations that the compiler is making. IE: pgcc -c -pg -O3 -Minfo=all -Minline -c -o example.o example.c run: 55, Memory zero idiom, loop replaced by call to…
stoltzstrop
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1 answer

PGC map but no entry

Got this the other day and have no idea what it means in my android logs for a program I was debugging: dalvikvm: PGC: map but no entry for Lcom/myapp/Uploader;.run addr=0x01ab Should I be worried?
JPM
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OpenAcc program built with C++ compiler is way slower than C built version

The code I'm working on is in C++ and is slightly complicated but the the example below shows the problem. It comes from a book by Chandrasekaran and Juckeland. If it is compiled with nvc -acc (or pgcc -acc, as the authors did) and ran, it takes a…
paww
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C, pgcc - automatic parallelization "not countable"

I use this for loop, which I want to have parallelizide automaticaly, it is used for count of PI number: piece=1.0/100000; for (t=0.0; t<1.0; t=t+piece){ x=t+piece/(float)2; if(x<=1.0){ integral=4/(1+x*x); sum=sum+integral; …
Waypoint
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Using OpenACC to parallelize nested loops

I am very new to openacc and have just high-level knowledge so any help and explanation of what I am doing wrong would be appreciated. I am trying to accelerate(parallelize) a not so straightforward nested loop that updates a flattened (3D to 1D)…
anupshrestha
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openACC passing a list of struct

I have a C program to find whether 2 sets of polygons are overlapped. User input 2 sets of polygon (each set of data has several thousands polygons) and the program see which polygon in set1 overlap with which polygon in set2 I have 2 struct like…
dondonhk
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Is dependence analysis mandatory for OpenACC compilers?

Many OpenACC tutorials assume that the compiler/accelerator will check for correctness, by automatically inspecting dependencies and ensuring that the loop is actually parallelizable. However, the OpenACC specification doesn't seem to mention…
Pericles Alves
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PostgreSQL reports an error out of memory using EXEC SQL

I use EXEC SQL to execute a very long SQL (6000 characters) in PGC file, sometimes error SQLSTATE=[YE001] SQLERRM=[out of memory on line 400], sometimes it works fine. Use vmstat to view memory -------------memory---------- swpd free buff…
kldd
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openacc error when assigning values to dynamically allocated struct member array of struct referenced by pointer

I am trying to wrap my head around combining openacc with pointers to structs containing dynamically allocated members. The code below fails with Failing in Thread:1 call to cuStreamSynchronize returned error 700: Illegal address during kernel…
Hendrik van Eerten
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OpenACC: How to select an array on device from a pointer to corresponding array on host

I am trying to offload an existing C code to GPU using OpenACC. In the original CPU code, many times, it is required to select a data array based on the value of some parameter. A sample CPU code is given below: #include #include…
Ali Imran
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Using openmp to distribute matrix multiplication work across multiple GPUs via openacc using C

I am trying to distribute the work of multiplying two NxN matrices across 3 nVidia GPUs using 3 OpenMP threads. (The matrix values will get large hence the long long data type.) However I am having trouble placing the #pragma acc parallel loop in…
FastGTR
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pgcc, C - Loop not parallelized: may not be beneficial

I want help to figure out automatic parallelization with error - Loop not parallelized: may not be beneficial. I want to test this code for parallelization, but I don't know, how to make the code effective for compiler to parallelizie it. Here is…
Waypoint
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Why does mixed binary with Haskell and OpenACC get SEGV?

Why does mixed binary with Haskell and OpenACC get SEGV? The mixed binary with GCC and OpenACC has good result: https://github.com/master-q/test-openacc-gcc $ make gcc main.c -ldl /opt/pgi/linux86-64/17.10/bin/pgcc -shared -fpic -fast -acc…
masterq
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Compile FFTW with pgcc, undefined reference

For other software I need fftw-2.1.5 with --enable-mpi --enable-type-prefix --enable-float installed. It should be compiled with pgcc PGCC, etc. are installed under the /home directory. For this post I have shortend it with path-to. I…
daniel7558
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