From 4e56fe682e6ad34c161aa40c06af4e3e0088962e Mon Sep 17 00:00:00 2001
From: Samo Penic <samo.penic@gmail.com>
Date: Fri, 22 Nov 2013 19:29:14 +0000
Subject: [PATCH] Testing of paralel algorithm with mutexes and tainting. Still no success. It seems tainting and untainting does not works as suspected
---
src/timestep.c | 84 +++++++++++++++++++++++++++++++++---------
1 files changed, 66 insertions(+), 18 deletions(-)
diff --git a/src/timestep.c b/src/timestep.c
index 1ac1eb4..3290184 100644
--- a/src/timestep.c
+++ b/src/timestep.c
@@ -1,6 +1,8 @@
#include<stdlib.h>
#include<stdio.h>
#include<math.h>
+#include<pthread.h>
+#include<unistd.h> //usleep requires it
//#include "io.h"
#include "general.h"
#include "timestep.h"
@@ -9,15 +11,44 @@
#include "frame.h"
#include "vertex.h"
#include "io.h"
+
ts_bool run_simulation(ts_vesicle *vesicle, ts_uint mcsweeps, ts_uint inititer, ts_uint iterations){
ts_uint i, j;
centermass(vesicle);
cell_occupation(vesicle);
ts_fprintf(stdout, "Starting simulation (first %d x %d MC sweeps will not be recorded on disk)\n", inititer, mcsweeps);
- for(i=0;i<inititer+iterations;i++){
+ pthread_t tid1,tid2, tid3, tid4;
+ thdata data1, data2, data3, data4;
+ pthread_mutex_t mutex;
+ data1.thread_no=0;
+ data2.thread_no=1;
+ data1.vesicle=vesicle;
+ data2.vesicle=vesicle;
+ data3.thread_no=2;
+ data4.thread_no=3;
+ data3.vesicle=vesicle;
+ data4.vesicle=vesicle;
+
+ data1.vtx_tainting_lock=&mutex;
+ data2.vtx_tainting_lock=&mutex;
+ data3.vtx_tainting_lock=&mutex;
+ data4.vtx_tainting_lock=&mutex;
+
+ pthread_mutex_init(&mutex,NULL);
+
+ for(i=0;i<inititer+iterations;i++){
for(j=0;j<mcsweeps;j++){
- single_timestep(vesicle);
+ pthread_create(&tid1,NULL,single_timestep,(void *)&data1);
+ pthread_create(&tid2,NULL,single_timestep,(void *)&data2);
+ pthread_create(&tid3,NULL,single_timestep,(void *)&data3);
+ pthread_create(&tid4,NULL,single_timestep,(void *)&data4);
+ pthread_join(tid1,NULL);
+ pthread_join(tid2,NULL);
+ pthread_join(tid3,NULL);
+ pthread_join(tid4,NULL);
+
+// single_timestep(vesicle);
}
centermass(vesicle);
cell_occupation(vesicle);
@@ -25,35 +56,49 @@
write_vertex_xml_file(vesicle,i-inititer);
}
}
+
+ pthread_mutex_destroy(&mutex);
+ pthread_exit(NULL);
return TS_SUCCESS;
}
-ts_bool single_timestep(ts_vesicle *vesicle){
- ts_bool retval;
+void * single_timestep(void *thread_data){
+ thdata *data;
+ data=(thdata *)thread_data;
+ ts_vesicle *vesicle=data->vesicle;
+ ts_uint thID=data->thread_no;
+ ts_uint partition_size=(ts_uint)(vesicle->vlist->n/4);
+ ts_uint end;
+ if(thID==3){
+ end=vesicle->vlist->n;
+ } else {
+ end=(thID+1)*partition_size;
+ }
ts_double rnvec[3];
- ts_uint i, b;
- for(i=0;i<vesicle->vlist->n;i++){
+ ts_uint i; //b;
+ for(i=thID*partition_size;i<end;i++){
rnvec[0]=drand48();
rnvec[1]=drand48();
rnvec[2]=drand48();
- vertex_taint(vesicle->vlist->vtx[i],1);
-// ts_fprintf(stdout, "Vertex %d should be tainted, level=%d.\n", i, vesicle->vlist->vtx[i]->locked);
- if(vertex_tainted(vesicle->vlist->vtx[i],1,1)){
- ts_fprintf(stdout, "Vertex %d tainted, level=%d. Waiting....\n", i, vesicle->vlist->vtx[i]->locked);
- while(vertex_tainted(vesicle->vlist->vtx[i],1,1));
+
+ /**** THREAD IS POTENTIALLY LOCKED ******/
+ pthread_mutex_lock(data->vtx_tainting_lock); //taint if no other process is tainting or wait until you can taint
+ // ts_fprintf(stdout, "thID=%d:: Tainting vertex %d, level=%d. Waiting....\n",thID, i, vesicle->vlist->vtx[i]->locked);
+ while(vertex_tainted(vesicle->vlist->vtx[i],1,1)){
+ ts_fprintf(stdout, "thID=%d:: Vertex %d is tainted, so I cannot try vertexmove. Level=%d. WAITING!\n",thID, i, vesicle->vlist->vtx[i]->locked);
}
- retval=single_verticle_timestep(vesicle,vesicle->vlist->vtx[i],rnvec);
+ vertex_taint(vesicle->vlist->vtx[i],1);
+ pthread_mutex_unlock(data->vtx_tainting_lock);
+ /**** THREAD IS RELEASING MUTEX RESOURCES ******/
+
+ single_verticle_timestep(vesicle,vesicle->vlist->vtx[i],rnvec);
vertex_untaint(vesicle->vlist->vtx[i],1);
// ts_fprintf(stdout, "Vertex %d should be untainted, level=%d.\n", i, vesicle->vlist->vtx[i]->locked);
}
// ts_int cnt=0;
+/*
for(i=0;i<vesicle->vlist->n;i++){
-//why is rnvec needed in bondflip?
-/* rnvec[0]=drand48();
- rnvec[1]=drand48();
- rnvec[2]=drand48();
-*/
b=rand() % vesicle->blist->n;
//find a bond and return a pointer to a bond...
//call single_bondflip_timestep...
@@ -61,8 +106,11 @@
// if(retval==TS_SUCCESS) cnt++;
}
// printf("Bondflip success rate in one sweep: %d/%d=%e\n", cnt,vesicle->blist->n,(double)cnt/(double)vesicle->blist->n);
- if(retval);
+*/
+/* if(retval);
return TS_SUCCESS;
+*/
+ pthread_exit(0); /* exit */
}
--
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