| // RUN: %libomp-cxx-compile -fopenmp-version=51 |
| // RUN: %libomp-run | FileCheck %s --check-prefix OMP51 |
| |
| #include <stdio.h> |
| #include <omp.h> |
| |
| void foo() { |
| #pragma omp parallel num_threads(10) |
| { printf("\ntarget: foo(): parallel num_threads(10)"); } |
| } |
| |
| int main(void) { |
| |
| int tl = 4; |
| printf("\nmain: thread_limit = %d", omp_get_thread_limit()); |
| // OMP51: main: thread_limit = {{[0-9]+}} |
| |
| #pragma omp target thread_limit(tl) |
| { |
| printf("\ntarget: thread_limit = %d", omp_get_thread_limit()); |
| int count = 0; |
| // OMP51: target: thread_limit = 4 |
| // check whether thread_limit is honoured |
| #pragma omp parallel reduction(+:count) |
| { count++; } |
| printf("\ntarget: parallel: count = %d", count); |
| // OMP51: target: parallel: count = {{(1|2|3|4)$}} |
| |
| // check whether num_threads is honoured |
| #pragma omp parallel num_threads(2) |
| { printf("\ntarget: parallel num_threads(2)"); } |
| // OMP51: target: parallel num_threads(2) |
| // OMP51: target: parallel num_threads(2) |
| // OMP51-NOT: target: parallel num_threads(2) |
| |
| // check whether thread_limit is honoured when there is a conflicting |
| // num_threads |
| #pragma omp parallel num_threads(10) |
| { printf("\ntarget: parallel num_threads(10)"); } |
| // OMP51: target: parallel num_threads(10) |
| // OMP51: target: parallel num_threads(10) |
| // OMP51: target: parallel num_threads(10) |
| // OMP51: target: parallel num_threads(10) |
| // OMP51-NOT: target: parallel num_threads(10) |
| |
| // check whether threads are limited across functions |
| foo(); |
| // OMP51: target: foo(): parallel num_threads(10) |
| // OMP51: target: foo(): parallel num_threads(10) |
| // OMP51: target: foo(): parallel num_threads(10) |
| // OMP51: target: foo(): parallel num_threads(10) |
| // OMP51-NOT: target: foo(): parallel num_threads(10) |
| |
| // check if user can set num_threads at runtime |
| omp_set_num_threads(2); |
| #pragma omp parallel |
| { printf("\ntarget: parallel with omp_set_num_thread(2)"); } |
| // OMP51: target: parallel with omp_set_num_thread(2) |
| // OMP51: target: parallel with omp_set_num_thread(2) |
| // OMP51-NOT: target: parallel with omp_set_num_thread(2) |
| |
| // make sure thread_limit is unaffected by omp_set_num_threads |
| printf("\ntarget: thread_limit = %d", omp_get_thread_limit()); |
| // OMP51: target: thread_limit = 4 |
| } |
| |
| // checking consecutive target regions with different thread_limits |
| #pragma omp target thread_limit(3) |
| { |
| printf("\nsecond target: thread_limit = %d", omp_get_thread_limit()); |
| int count = 0; |
| // OMP51: second target: thread_limit = 3 |
| #pragma omp parallel reduction(+:count) |
| { count++; } |
| printf("\nsecond target: parallel: count = %d", count); |
| // OMP51: second target: parallel: count = {{(1|2|3)$}} |
| } |
| |
| // confirm that thread_limit's effects are limited to target region |
| printf("\nmain: thread_limit = %d", omp_get_thread_limit()); |
| // OMP51: main: thread_limit = {{[0-9]+}} |
| #pragma omp parallel num_threads(10) |
| { printf("\nmain: parallel num_threads(10)"); } |
| // OMP51: main: parallel num_threads(10) |
| // OMP51: main: parallel num_threads(10) |
| // OMP51: main: parallel num_threads(10) |
| // OMP51: main: parallel num_threads(10) |
| // OMP51: main: parallel num_threads(10) |
| // OMP51: main: parallel num_threads(10) |
| // OMP51: main: parallel num_threads(10) |
| // OMP51: main: parallel num_threads(10) |
| // OMP51: main: parallel num_threads(10) |
| // OMP51: main: parallel num_threads(10) |
| // OMP51-NOT: main: parallel num_threads(10) |
| |
| // check combined target directives which support thread_limit |
| // target parallel |
| #pragma omp target parallel thread_limit(2) |
| printf("\ntarget parallel thread_limit(2)"); |
| // OMP51: target parallel thread_limit(2) |
| // OMP51: target parallel thread_limit(2) |
| // OMP51-NOT: target parallel thread_limit(2) |
| |
| #pragma omp target parallel num_threads(2) thread_limit(3) |
| printf("\ntarget parallel num_threads(2) thread_limit(3)"); |
| // OMP51: target parallel num_threads(2) thread_limit(3) |
| // OMP51: target parallel num_threads(2) thread_limit(3) |
| // OMP51-NOT: target parallel num_threads(2) thread_limit(3) |
| |
| #pragma omp target parallel num_threads(3) thread_limit(2) |
| printf("\ntarget parallel num_threads(3) thread_limit(2)"); |
| // OMP51: target parallel num_threads(3) thread_limit(2) |
| // OMP51: target parallel num_threads(3) thread_limit(2) |
| // OMP51-NOT: target parallel num_threads(3) thread_limit(2) |
| |
| // target parallel for |
| #pragma omp target parallel for thread_limit(2) |
| for (int i = 0; i < 5; ++i) |
| printf("\ntarget parallel for thread_limit(2) : thread num = %d", |
| omp_get_thread_num()); |
| // OMP51: target parallel for thread_limit(2) : thread num = {{0|1}} |
| // OMP51: target parallel for thread_limit(2) : thread num = {{0|1}} |
| // OMP51: target parallel for thread_limit(2) : thread num = {{0|1}} |
| // OMP51: target parallel for thread_limit(2) : thread num = {{0|1}} |
| // OMP51: target parallel for thread_limit(2) : thread num = {{0|1}} |
| // OMP51-NOT: target parallel for thread_limit(3) : thread num = {{0|1}} |
| |
| // target parallel for simd |
| #pragma omp target parallel for simd thread_limit(2) |
| for (int i = 0; i < 5; ++i) |
| printf("\ntarget parallel for simd thread_limit(2) : thread num = %d", |
| omp_get_thread_num()); |
| // OMP51: target parallel for simd thread_limit(2) : thread num = {{0|1}} |
| // OMP51: target parallel for simd thread_limit(2) : thread num = {{0|1}} |
| // OMP51: target parallel for simd thread_limit(2) : thread num = {{0|1}} |
| // OMP51: target parallel for simd thread_limit(2) : thread num = {{0|1}} |
| // OMP51: target parallel for simd thread_limit(2) : thread num = {{0|1}} |
| // OMP51-NOT: target parallel for simd thread_limit(2) : thread num = |
| // {{0|1}} |
| |
| // target simd |
| #pragma omp target simd thread_limit(2) |
| for (int i = 0; i < 5; ++i) |
| printf("\ntarget simd thread_limit(2) : thread num = %d", |
| omp_get_thread_num()); |
| // OMP51: target simd thread_limit(2) : thread num = {{0|1}} |
| // OMP51: target simd thread_limit(2) : thread num = {{0|1}} |
| // OMP51: target simd thread_limit(2) : thread num = {{0|1}} |
| // OMP51: target simd thread_limit(2) : thread num = {{0|1}} |
| // OMP51: target simd thread_limit(2) : thread num = {{0|1}} |
| // OMP51-NOT: target simd thread_limit(2) : thread num = {{0|1}} |
| |
| // target parallel loop |
| #pragma omp target parallel loop thread_limit(2) |
| for (int i = 0; i < 5; ++i) |
| printf("\ntarget parallel loop thread_limit(2) : thread num = %d", |
| omp_get_thread_num()); |
| // # OMP51: target parallel loop thread_limit(2) : thread num = {{0|1}} |
| // # OMP51: target parallel loop thread_limit(2) : thread num = {{0|1}} |
| // # OMP51: target parallel loop thread_limit(2) : thread num = {{0|1}} |
| // # OMP51: target parallel loop thread_limit(2) : thread num = {{0|1}} |
| // # OMP51: target parallel loop thread_limit(2) : thread num = {{0|1}} |
| // # OMP51-NOT: target parallel loop thread_limit(2) : thread num = {{0|1}} |
| return 0; |
| } |