offloading

Gcc offload compilation options

由 纵饮孤独 提交于 2020-12-13 03:33:32
问题 I'm trying to build the simplest OpenMP or OpenACC C++ program with GPU offload using gcc-10, CUDA 11 on Ubuntu 18.04 and this CMakeLists.txt file (or OpenMP version): cmake_minimum_required(VERSION 3.18) project(hello VERSION 0.1.0) find_package(OpenACC REQUIRED) add_executable(hello main.cpp) target_compile_options(hello PRIVATE -O3 -fopenacc -foffload=nvptx-none) target_link_libraries (hello OpenACC::OpenACC_CXX) The build fails with: [build] [100%] Linking CXX executable hello [build]

Gcc offload compilation options

由 女生的网名这么多〃 提交于 2020-12-13 03:31:48
问题 I'm trying to build the simplest OpenMP or OpenACC C++ program with GPU offload using gcc-10, CUDA 11 on Ubuntu 18.04 and this CMakeLists.txt file (or OpenMP version): cmake_minimum_required(VERSION 3.18) project(hello VERSION 0.1.0) find_package(OpenACC REQUIRED) add_executable(hello main.cpp) target_compile_options(hello PRIVATE -O3 -fopenacc -foffload=nvptx-none) target_link_libraries (hello OpenACC::OpenACC_CXX) The build fails with: [build] [100%] Linking CXX executable hello [build]

Android: determining the current context to display an alert

由 百般思念 提交于 2020-01-05 08:24:07
问题 I am calling the ZXing scanner from Screen-A using Intent s. Once the scan is done, control returns, of course, to the code behind Screen-A and I do some other work before calling Screen-B. Problem is: the screen is black during this work period and I cannot determine the proper context to use to display a "working..." Toast/msgbox. Any help or suggestions? 回答1: Execute your " work period " in it's own thread , while that thread works in the background Android will pass control to Screen-A

Force Grails/Weblogic To Only Redirect Using HTTPS protocol

由 ￡可爱￡侵袭症＋ 提交于 2020-01-03 15:54:31
问题 I'm using Grails (2.2.2) on a project and my application issues undesirable http redirects instead of https redirects. We currently have an F5 load balancer in front of Oracle Weblogic. The F5 is offloading our SSL from Weblogic. The F5 only accepts https requests and Weblogic only accepts http requests. My Grails project uses the Spring Security and Spring Security CAS plugin. The problem typically occurs on a successful CAS login. Grails seems to always issue an HTTP redirect. My serverURL

Force Grails/Weblogic To Only Redirect Using HTTPS protocol

由 走远了吗. 提交于 2020-01-03 15:54:13
问题 I'm using Grails (2.2.2) on a project and my application issues undesirable http redirects instead of https redirects. We currently have an F5 load balancer in front of Oracle Weblogic. The F5 is offloading our SSL from Weblogic. The F5 only accepts https requests and Weblogic only accepts http requests. My Grails project uses the Spring Security and Spring Security CAS plugin. The problem typically occurs on a successful CAS login. Grails seems to always issue an HTTP redirect. My serverURL

Unexplained Xeon-Phi Overhead

由 隐身守侯 提交于 2020-01-03 01:22:45
问题 I am trying to run this code with these different n sizes on an Xeon Phi KNC. I am getting the timings as shown in the table, but I have no idea why I am experiencing those fluctuations. Can you please guide me through it? Thanks in advance. CODE: program prog integer, allocatable :: arr1(:), arr2(:) integer :: i, n, time_start, time_end n=481 do while (n .le. 481000000) allocate(arr1(n),arr2(n)) call system_clock(time_start) !dir$ offload begin target(mic) !$omp SIMD do i=1,n arr1(i) = arr1

How do I use the GPU available with OpenMP?

由 自古美人都是妖i 提交于 2019-12-22 05:57:11
问题 I am trying to get some code to run on the GPU using OpenMP, but I am not succeeding. In my code, I am performing a matrix multiplication using for loops: once using OpenMP pragma tags and once without. (This is so that I can compare the execution time.) After the first loop I call omp_get_num_devices() (this is my main test to see if I'm actually connecting to a GPU.) No matter what I try, omp_get_num_devices() always returns 0. The computer I am using has two NVIDIA Tesla K40M GPUs . CUDA 7

OpenMP offloaded target region executed in both host and target-device

由 岁酱吖の 提交于 2019-12-06 15:15:14
I'm working on a project which requires OpenMP offloading to Nvidia GPUs using Clang. I was able to install Clang to support offloading by following instructions mentioned here . System specification OS - Ubuntu 16.04 LTS Clang -version 4.00 Processor - Intel(R) Core(TM) i7 -4700MQ CPU Cuda -version - 9.0 Nvidia GPU - GeForce 740M (sm_capability - 35) But the problem is I when I execute a sample program to test OpenMP to Nvidia GPUs, part of the target region tends to run in GPU and then same target region starts executing in the host. Please find the sample program here, This a small C

OpenMP offloading to Nvidia wrong reduction

由 南笙酒味 提交于 2019-11-30 08:35:46
问题 I am interested in offloading work to the GPU with OpenMP. The code below gives the correct value of sum on the CPU //g++ -O3 -Wall foo.cpp -fopenmp #pragma omp parallel for reduction(+:sum) for(int i = 0 ; i < 2000000000; i++) sum += i%11; It also works on the GPU with OpenACC like this //g++ -O3 -Wall foo.cpp -fopenacc #pragma acc parallel loop reduction(+:sum) for(int i = 0 ; i < 2000000000; i++) sum += i%11; nvprof shows that it runs on the GPU and it's also faster than OpenMP on the CPU.

OpenMP offloading to Nvidia wrong reduction

由 白昼怎懂夜的黑 提交于 2019-11-29 10:50:25
I am interested in offloading work to the GPU with OpenMP. The code below gives the correct value of sum on the CPU //g++ -O3 -Wall foo.cpp -fopenmp #pragma omp parallel for reduction(+:sum) for(int i = 0 ; i < 2000000000; i++) sum += i%11; It also works on the GPU with OpenACC like this //g++ -O3 -Wall foo.cpp -fopenacc #pragma acc parallel loop reduction(+:sum) for(int i = 0 ; i < 2000000000; i++) sum += i%11; nvprof shows that it runs on the GPU and it's also faster than OpenMP on the CPU. However when I try to offload to the GPU with OpenMP like this //g++ -O3 -Wall foo.cpp -fopenmp -fno
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