From 0a82d57369cbf7a854aa944158be9caa338b850d Mon Sep 17 00:00:00 2001
From: carlocamilloni <carlo.camilloni@gmail.com>
Date: Fri, 7 Dec 2018 01:12:39 +0100
Subject: [PATCH] MultiColvar: improve openmp performance
---
src/vesselbase/ActionWithVessel.cpp | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/src/vesselbase/ActionWithVessel.cpp b/src/vesselbase/ActionWithVessel.cpp
index ea5063467..de9b94954 100644
--- a/src/vesselbase/ActionWithVessel.cpp
+++ b/src/vesselbase/ActionWithVessel.cpp
@@ -265,7 +265,7 @@ void ActionWithVessel::runAllTasks() {
// Get number of threads for OpenMP
unsigned nt=OpenMP::getNumThreads();
- if( nt*stride*10>nactive_tasks || !threadSafe()) nt=1;
+ if( nt*stride*2>nactive_tasks || !threadSafe()) nt=1;
// Get size for buffer
unsigned bsize=0, bufsize=getSizeOfBuffer( bsize );
@@ -275,7 +275,7 @@ void ActionWithVessel::runAllTasks() {
if( dertime_can_be_off ) dertime=false;
if(timers) stopwatch.start("2 Loop over tasks");
- #pragma omp parallel num_threads(nt)
+ #pragma omp parallel num_threads(nt) schedule(dynamic)
{
std::vector<double> omp_buffer;
if( nt>1 ) omp_buffer.resize( bufsize, 0.0 );
--
GitLab