Running average
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d16c42d9f5
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59100a471f
26
src/main.c
26
src/main.c
@ -25,6 +25,7 @@ typedef struct nstrophy_parameters {
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double delta;
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double L;
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unsigned int print_freq;
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unsigned int avg_window;
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int seed;
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unsigned int starting_time;
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} nstrophy_parameters;
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@ -37,7 +38,7 @@ int print_params(nstrophy_parameters parameters, unsigned int driving, unsigned
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// read command line arguments
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int read_args(int argc, const char* argv[], char** params, unsigned int* driving_force, unsigned int* command, unsigned int* init, unsigned int* nthreads, char** savefile_str, char** initfile_str);
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int read_params(char* param_str, nstrophy_parameters* parameters);
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int set_parameter(char* lhs, char* rhs, nstrophy_parameters* parameters, bool* setN1, bool* setN2);
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int set_parameter(char* lhs, char* rhs, nstrophy_parameters* parameters, bool* setN1, bool* setN2, bool* setavg_window);
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// set driving force
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_Complex double* set_driving(unsigned int driving, nstrophy_parameters parameters);
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@ -125,7 +126,7 @@ int main (
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uk(parameters.K1, parameters.K2, parameters.N1, parameters.N2, parameters.nsteps, parameters.nu, parameters.delta, parameters.L, u0, g, parameters.irreversible, parameters.print_freq, parameters.starting_time, nthreads, savefile);
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}
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else if(command==COMMAND_EEA){
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eea(parameters.K1, parameters.K2, parameters.N1, parameters.N2, parameters.nsteps, parameters.nu, parameters.delta, parameters.L, u0, g, parameters.irreversible, parameters.print_freq, parameters.starting_time, nthreads, savefile);
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eea(parameters.K1, parameters.K2, parameters.N1, parameters.N2, parameters.nsteps, parameters.nu, parameters.delta, parameters.L, u0, g, parameters.irreversible, parameters.print_freq, parameters.avg_window, parameters.starting_time, nthreads, savefile);
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}
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else if(command==COMMAND_QUIET){
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quiet(parameters.K1, parameters.K2, parameters.N1, parameters.N2, parameters.nsteps, parameters.nu, parameters.delta, parameters.L, u0, g, parameters.irreversible, nthreads, savefile);
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@ -343,6 +344,8 @@ int read_params(
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// whether N was set explicitly
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bool setN1=false;
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bool setN2=false;
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// whether avg_window was set explicitly
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bool setavg_window=false;
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// whether lhs (false is rhs)
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bool lhs=true;
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@ -380,7 +383,7 @@ int read_params(
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break;
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case ';':
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//set parameter
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ret=set_parameter(buffer_lhs, buffer_rhs, parameters, &setN1, &setN2);
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ret=set_parameter(buffer_lhs, buffer_rhs, parameters, &setN1, &setN2, &setavg_window);
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if(ret<0){
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return ret;
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}
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@ -407,7 +410,7 @@ int read_params(
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// set last param
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if (*param_str!='\0'){
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ret=set_parameter(buffer_lhs, buffer_rhs, parameters, &setN1, &setN2);
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ret=set_parameter(buffer_lhs, buffer_rhs, parameters, &setN1, &setN2, &setavg_window);
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if(ret<0){
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return ret;
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}
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@ -425,6 +428,10 @@ int read_params(
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if (!setN2){
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parameters->N2=smallest_pow2(3*(parameters->K2));
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}
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// if avg_window is not set explicitly, set it to print_freq
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if (!setavg_window){
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parameters->avg_window=parameters->print_freq;
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}
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return(0);
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}
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@ -436,7 +443,8 @@ int set_parameter(
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char* rhs,
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nstrophy_parameters* parameters,
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bool* setN1,
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bool* setN2
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bool* setN2,
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bool* setavg_window
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){
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int ret;
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@ -542,6 +550,14 @@ int set_parameter(
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return(-1);
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}
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}
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else if (strcmp(lhs,"avg_window")==0){
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ret=sscanf(rhs,"%u",&(parameters->avg_window));
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if(ret!=1){
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fprintf(stderr, "error: parameter 'avg_window' should be an integer\n got '%s'\n",rhs);
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return(-1);
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}
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*setavg_window=true;
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}
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else if (strcmp(lhs,"random_seed")==0){
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ret=sscanf(rhs,"%d",&(parameters->seed));
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if(ret!=1){
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@ -90,6 +90,7 @@ int eea(
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_Complex double* g,
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bool irreversible,
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unsigned int print_freq,
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unsigned int running_avg_window,
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unsigned int starting_time,
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unsigned int nthreads,
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FILE* savefile
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@ -100,6 +101,11 @@ int eea(
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_Complex double* tmp3;
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double alpha, energy, enstrophy;
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double avg_e,avg_a,avg_en;
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// quantities needed to compute averages
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double *save_print_e, *save_print_a, *save_print_en;
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double *save_print_short_e, *save_print_short_a, *save_print_short_en;
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// index
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unsigned int i;
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unsigned int t;
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fft_vect fft1;
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fft_vect fft2;
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@ -115,6 +121,28 @@ int eea(
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avg_a=0;
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avg_en=0;
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// need this for running average
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unsigned int short_len=running_avg_window % print_freq;
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// number of full print intervals in running average window
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unsigned int nr_print_in_window = (running_avg_window-short_len)/print_freq;
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double avg_print_e=0;
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double avg_print_a=0;
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double avg_print_en=0;
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double avg_print_short_e=0;
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double avg_print_short_a=0;
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double avg_print_short_en=0;
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// save e a en for running average
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// only need to save if window is non zero
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if(running_avg_window!=0){
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save_print_e=calloc(sizeof(double), nr_print_in_window);
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save_print_a=calloc(sizeof(double), nr_print_in_window);
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save_print_en=calloc(sizeof(double), nr_print_in_window);
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save_print_short_e=calloc(sizeof(double), nr_print_in_window+1);
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save_print_short_a=calloc(sizeof(double), nr_print_in_window+1);
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save_print_short_en=calloc(sizeof(double), nr_print_in_window+1);
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}
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// iterate
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for(t=starting_time;t<starting_time+nsteps;t++){
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ns_step(u, K1, K2, N1, N2, nu, delta, L, g, fft1, fft2, ifft, tmp1, tmp2, tmp3, irreversible);
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@ -127,18 +155,92 @@ int eea(
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enstrophy=compute_enstrophy(u, K1, K2, L);
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// running average
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if(t>0){
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avg_e=avg_e-(avg_e-energy)/t;
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avg_a=avg_a-(avg_a-alpha)/t;
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avg_en=avg_en-(avg_en-enstrophy)/t;
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// if window=0, then take average over all times
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if(running_avg_window==0){
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if(t!=0){
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avg_e=avg_e-(avg_e-energy)/t;
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avg_a=avg_a-(avg_a-alpha)/t;
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avg_en=avg_en-(avg_en-enstrophy)/t;
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}
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}
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else{
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// reset print interval averages
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if(t % print_freq == 1){
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avg_print_e=0;
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avg_print_a=0;
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avg_print_en=0;
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avg_print_short_e=0;
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avg_print_short_a=0;
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avg_print_short_en=0;
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}
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// compute average over print interval
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avg_print_e=avg_print_e+energy/print_freq;
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avg_print_a=avg_print_a+alpha/print_freq;
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avg_print_en=avg_print_en+enstrophy/print_freq;
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// compute average over the last short_len elements of a print interval
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if (short_len != 0 && (t % print_freq > print_freq-short_len || t % print_freq == 0)){
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avg_print_short_e+=energy/short_len;
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avg_print_short_a+=alpha/short_len;
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avg_print_short_en+=enstrophy/short_len;
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}
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if(t % print_freq ==0 && t>0){
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// compute averages
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if (t > running_avg_window) {
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avg_e=save_print_short_e[nr_print_in_window]*((double)short_len/running_avg_window);
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avg_a=save_print_short_a[nr_print_in_window]*((double)short_len/running_avg_window);
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avg_en=save_print_short_en[nr_print_in_window]*((double)short_len/running_avg_window);
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for(i=0;i<nr_print_in_window;i++){
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// prevent warnings: these will be initialized as long as t > running_avg_window
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
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avg_e+=save_print_e[i]*((double)print_freq/running_avg_window);
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avg_a+=save_print_a[i]*((double)print_freq/running_avg_window);
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avg_en+=save_print_en[i]*((double)print_freq/running_avg_window);
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#pragma GCC diagnostic pop
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}
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}
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// memorize averages for future use
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// need to keep track of case ==0, otherwise nr_print_in_window-1 is not an unsigned int
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if(nr_print_in_window>0){
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for(i=0;i<nr_print_in_window-1;i++){
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save_print_e[i+1]=save_print_e[i];
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save_print_a[i+1]=save_print_a[i];
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save_print_en[i+1]=save_print_en[i];
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}
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}
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for(i=0;i<nr_print_in_window;i++){
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save_print_short_e[i+1]=save_print_short_e[i];
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save_print_short_a[i+1]=save_print_short_a[i];
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save_print_short_en[i+1]=save_print_short_en[i];
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}
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save_print_e[0]=avg_print_e;
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save_print_a[0]=avg_print_a;
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save_print_en[0]=avg_print_en;
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save_print_short_e[0]=avg_print_short_e;
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save_print_short_a[0]=avg_print_short_a;
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save_print_short_en[0]=avg_print_short_en;
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}
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}
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if(t>0 && t%print_freq==0){
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if(t>running_avg_window && t%print_freq==0){
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fprintf(stderr,"%d % .8e % .8e % .8e % .8e % .8e % .8e % .8e\n",t,t*delta, avg_a, avg_e, avg_en, alpha, energy, enstrophy);
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printf("%8d % .15e % .15e % .15e % .15e % .15e % .15e % .15e\n",t,t*delta, avg_a, avg_e, avg_en, alpha, energy, enstrophy);
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}
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}
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if(running_avg_window!=0){
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free(save_print_e);
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free(save_print_a);
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free(save_print_en);
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free(save_print_short_e);
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free(save_print_short_a);
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free(save_print_short_en);
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}
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// save final entry to savefile
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write_u(u, K1, K2, savefile);
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@ -17,7 +17,7 @@ typedef struct fft_vects {
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int uk( int K1, int K2, int N1, int N2, unsigned int nsteps, double nu, double delta, double L, _Complex double* u0, _Complex double* g, bool irreversible, unsigned int print_freq, unsigned int starting_time, unsigned int nthreadsl, FILE* savefile);
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// compute energy, enstrophy and alpha
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int eea( int K1, int K2, int N1, int N2, unsigned int nsteps, double nu, double delta, double L, _Complex double* u0, _Complex double* g, bool irreversible, unsigned int print_freq, unsigned int starting_time, unsigned int nthreads, FILE* savefile);
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int eea( int K1, int K2, int N1, int N2, unsigned int nsteps, double nu, double delta, double L, _Complex double* u0, _Complex double* g, bool irreversible, unsigned int print_freq, unsigned int running_avg_window, unsigned int starting_time, unsigned int nthreads, FILE* savefile);
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// compute solution as a function of time, but do not print anything (useful for debugging)
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int quiet( int K1, int K2, int N1, int N2, unsigned int nsteps, double nu, double delta, double L, _Complex double* u0, _Complex double* g, bool irreversible, unsigned int nthreads, FILE* savefile);
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