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#include "atlas_threads.h"
#include "atlas_misc.h"
typedef struct
{
volatile int *donearr; /* starts all zero */
int rank, nthr;
} ATL_TUNE_T;
void TuneDoWork(ATL_LAUNCHSTRUCT_t *lp, void *vp)
/*
* Use volatile array to check in, and then quit (cache-speed barrier)
*/
{
ATL_TUNE_T *tp = vp;
const int nthr = tp->nthr;
int i;
tp->donearr[tp->rank] = 1;
for (i=0; i < nthr; i++)
while(!tp->donearr[i]);
}
void PrintUsage(char *exe)
{
fprintf(stderr, "USAGE: %s [-r <reps>] -W [which]\n", exe);
fprintf(stderr,
" which: bitfield, 1st bit is dyn, 2nd is lg2, 3rd is linear\n");
exit(-1);
}
int GetFlags(int nargs, char **args, int *which)
{
int i, reps=1;
*which = 7;
for (i=1; i < nargs; i++)
{
if (args[i][0] != '-')
PrintUsage(args[0]);
switch(args[i][1])
{
case 'r':
if (++i >= nargs)
PrintUsage(args[0]);
reps = atoi(args[i]);
break;
case 'W':
if (++i >= nargs)
PrintUsage(args[0]);
*which = atoi(args[i]);
break;
default:
PrintUsage(args[0]);
}
}
return(reps);
}
int main(int nargs, char **args)
{
int i, k, nreps = 200, opstride, which;
double t0, tlin, tlg2, tdyn, trnk;
ATL_TUNE_T ta[ATL_NTHREADS];
volatile int done[ATL_NTHREADS];
tlg2 = tdyn = tlin = 0.0;
nreps = GetFlags(nargs, args, &which);
for (i=0; i < ATL_NTHREADS; i++)
{
ta[i].rank = i;
ta[i].nthr = ATL_NTHREADS;
ta[i].donearr = done;
}
opstride = (int) ( ((char*)(ta+1)) - (char*)(ta) );
printf("FINDING SPEED OF CREATE/BARRIER/JOIN USING %d REPITITIONS:\n",
nreps);
if (which & 1)
{
t0 = ATL_walltime();
for (k=0; k < nreps; k++)
{
for (i=0; i < ATL_NTHREADS; i++) done[i] = 0;
ATL_goparallel_dyn(ATL_NTHREADS, TuneDoWork, ta, NULL);
}
tdyn = ATL_walltime() - t0;
printf(" dyn time = %e\n", (float)tdyn);
}
if (which & 2)
{
t0 = ATL_walltime();
for (k=0; k < nreps; k++)
{
for (i=0; i < ATL_NTHREADS; i++) done[i] = 0;
ATL_goparallel_log2(ATL_NTHREADS, TuneDoWork, ta, NULL);
}
tlg2 = ATL_walltime() - t0;
printf(" lg2 time = %e\n", (float)tlg2);
}
if (which & 4)
{
t0 = ATL_walltime();
for (k=0; k < nreps; k++)
{
for (i=0; i < ATL_NTHREADS; i++) done[i] = 0;
ATL_goparallel_lin(ATL_NTHREADS, TuneDoWork, ta, NULL);
}
tlin = ATL_walltime() - t0;
printf(" lin time = %e\n", (float)tlin);
}
if (which & 8)
{
t0 = ATL_walltime();
for (k=0; k < nreps; k++)
{
for (i=0; i < ATL_NTHREADS; i++) done[i] = 0;
ATL_goparallel_prank(ATL_NTHREADS, TuneDoWork_gp, ta, NULL);
}
trnk = ATL_walltime() - t0;
printf(" rnk time = %e\n", (float)trnk);
}
if ((which | 7) == which)
printf("DYNAMIC is %.2f%% of LINEAR and %.2f%% of LOG2 SPEED.\n",
(tdyn/tlin)*100.0, (tdyn/tlg2)*100.0);
if ((which & 1) && (which & 8))
printf("rank dynamic is %.2f%% of affinity dynamic\n", (trnk/tdyn)*100.0);
return(0);
}
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