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#include <stdio.h>

#include <stdlib.h>

#define MAXCONTEXT 100

#define MAXJOB 100000

#define INT_CTX 1

#define INT_PID 9999

#define PID_NO_DEF -1

#define BACKGROUND 0

#define PERIODICAL 1

#define INTERRUPT  2

struct ctx_exec {

	int ctx;

	unsigned long long dtsc;

	unsigned long long start;

};

struct ctx_to_pid {

	int ctx;

	int pid;

};

struct endcycle {

	int ctx;

	unsigned long long tsc;

};

void Error(int num) {

	printf("Finite-State machine error: %d\n",num);

	exit(2);

}

int context_total = 0,endcycle_total = 0,job_total = 0,exec_total = 0;

struct ctx_exec *exec_list;

struct ctx_to_pid *context_list;

struct endcycle *endcycle_list;

struct ctx_exec *job_list;

unsigned long long log_start_tsc = 0;

unsigned long long log_end_tsc = 0;

int create_lists(char *filename) {

  FILE *input_file;

  int type,par1,par2,k,i,state;

  int current_context = 0;

  int current_exec = 0;

  int current_endcycle = 0;

  unsigned long long last_tsc, tsc;

  input_file = fopen(filename,"r");

  /* Memory alloc */

  exec_list = malloc(sizeof(struct ctx_exec) * MAXJOB);

  context_list = malloc(sizeof(struct ctx_to_pid) * MAXCONTEXT);

  endcycle_list = malloc(sizeof(struct endcycle) * MAXJOB);

  /* Finite-State machine

   *

   * FS-Machine states:

        1 - Context running

        2 - Interrupt running

        10 - End

   */

  for(i=0;i<MAXCONTEXT;i++) {

    context_list[i].ctx = 0;

    context_list[i].pid = PID_NO_DEF;

  }

  /* The start context + interrupt context */

  context_total = 2;

  current_context = 0;

  last_tsc = 0;

  context_list[0].ctx = 0;

  context_list[0].pid = PID_NO_DEF;

  context_list[1].ctx = INT_CTX;

  context_list[1].pid = INT_PID;

  state = 0;

  k = 0;

  while(!feof(input_file)) {

    fscanf(input_file,"%d %llu",&type,&tsc);

    k++;

    switch (type) {

	case 0:

	case 1:

		/* No par */

		break;

	case 2:

	case 3:

	case 4:

	case 6:

	case 7:

	case 8:

		/* 1 par */

		fscanf(input_file,"%d",&par1);

		break;

	case 5:

		/* 2 par */

		fscanf(input_file,"%d %d",&par1,&par2);

		break;

    }

    switch (type) {

	case 0:

		if (state != 0) Error(1);

		printf("EVT:Log starts at [%12llu]\n",tsc);

		last_tsc = tsc;

		log_start_tsc = tsc;

		exec_list[current_exec].start = tsc;

		state = 1;

		break;

	case 1:

		printf("EVT:Log   ends at [%12llu]\n",tsc);

		exec_list[current_exec].dtsc = tsc - last_tsc;

                exec_list[current_exec].ctx = current_context;

                current_exec++;

		last_tsc = tsc;

		log_end_tsc = tsc;

		state = 10;

		break;

	/* Int start */

	case 2:

		if (state == 0) Error(2);

		exec_list[current_exec].dtsc = tsc - last_tsc;

		exec_list[current_exec].ctx = current_context;

		current_exec++;

		last_tsc = tsc;

		current_context = INT_CTX;

		exec_list[current_exec].start = tsc;

		state = 2;

		break;

	/* Int end */

	case 3:

		if (state != 2) Error(3);

		exec_list[current_exec].dtsc = tsc - last_tsc;

		exec_list[current_exec].ctx = current_context;

		current_exec++;

		last_tsc = tsc;

		current_context = par1;

		for (i=0;i<context_total;i++)

			if (par1 == context_list[i].ctx) break;

		if (i == context_total) {

			context_list[context_total].ctx = par1;

			context_total++;

		}

		exec_list[current_exec].start = tsc;

		state = 1;

		break;

	/* Change ctx */

	case 4:

		exec_list[current_exec].dtsc = tsc - last_tsc;

		exec_list[current_exec].ctx = current_context;

		current_exec++;

		last_tsc = tsc;

		current_context = par1;

                for (i=0;i<context_total;i++)

                        if (par1 == context_list[i].ctx) break;

                if (i == context_total) {

                        context_list[context_total].ctx = par1;

                        context_total++;

                }

		exec_list[current_exec].start = tsc;

		state = 1;

		break;

	/* Task create */

	case 5:

		for (i=0;i<context_total;i++)

                        if (par1 == context_list[i].ctx) break;

                if (i == context_total) {

                        context_list[context_total].ctx = par1;

			context_list[context_total].pid = par2;

                        context_total++;

                }

		break;

	/* Task endcycle */

	case 8:

		for (i=0;i<context_total;i++)

			if (par1 == context_list[i].ctx) break;

		if (i == context_total) Error(4);

		endcycle_list[current_endcycle].ctx = par1;

		endcycle_list[current_endcycle].tsc = tsc;

		current_endcycle++;

		break;

    }

    if (current_exec == MAXJOB-1) {

	printf("Too many execs...\n");

	exit(3);

    }

    if (current_endcycle == MAXJOB-1) {

        printf("Too many endcycle...\n");

        exit(4);

    }

    if (state == 10) break;

  }

  endcycle_total = current_endcycle;

  exec_total = current_exec;

  return k;

}

int create_job_list() {

  int current_job = 0, h, i, k;

  int temp_ctx;

  unsigned long long temp_tsc, endcycle_start_tsc;

  unsigned long long endcycle_end_tsc;

  job_list = malloc(sizeof(struct ctx_exec) * MAXJOB);

  for (k=0;k<context_total;k++) {

    temp_ctx = context_list[k].ctx;

    endcycle_start_tsc = 0;

    for (h=0;h<endcycle_total;h++) {

      if (endcycle_list[h].ctx == temp_ctx) {

	if (endcycle_start_tsc == 0)

	  endcycle_start_tsc = log_start_tsc;

	endcycle_end_tsc = endcycle_list[h].tsc;

	temp_tsc = 0;

  	job_list[current_job].start = 0;

	for(i=0;i<exec_total;i++)

		if (exec_list[i].ctx == temp_ctx) {

			if (exec_list[i].start < endcycle_end_tsc &&

				exec_list[i].start >= endcycle_start_tsc) {

				if (job_list[current_job].start == 0)

				  job_list[current_job].start = exec_list[i].start;

				temp_tsc += exec_list[i].dtsc;

			}

		}

	job_list[current_job].dtsc = temp_tsc;

	job_list[current_job].ctx = temp_ctx;

	current_job++;

	endcycle_start_tsc = endcycle_end_tsc;

      }

    }

  }

  job_total = current_job;

  return 0;

}

int elaborate_statistics(int num, int task_type) {

  int i,k;

  char pidstr[10];

  unsigned long long temp_tsc,max_tsc;

  unsigned long long last_start, delta_start;

  switch (context_list[num].pid) {

      case PID_NO_DEF:

        sprintf(pidstr,"NODEF");

        break;

      case INT_PID:

        sprintf(pidstr,"  INT");

        break;

      default:

        sprintf(pidstr,"%5d",context_list[num].pid);

        break;

  }

  if (task_type == BACKGROUND) {

    printf("Background Task CTX [%5d] PID [%s]\n",context_list[num].ctx,pidstr);

    temp_tsc = 0;

    max_tsc = 0;

    k = 0;

    for (i=0;i<exec_total;i++)

      if (exec_list[i].ctx == context_list[num].ctx) {

        if (exec_list[i].dtsc > max_tsc) max_tsc = exec_list[i].dtsc;

        temp_tsc += exec_list[i].dtsc;

        k++;

      }

    printf("  Total Execution dTSC [%12llu]\n",temp_tsc);

    printf("  Execs Number         [%12d]\n",k);

    printf("  Mean Exec       dTSC [%12llu]\n",temp_tsc / k);

    printf("  Max  Exec       dTSC [%12llu]\n\n",max_tsc);

  }

  if (task_type == INTERRUPT) {

    printf("Interrupts\n");

    temp_tsc = 0;

    max_tsc = 0;

    k = 0;

    for (i=0;i<exec_total;i++)

      if (exec_list[i].ctx == context_list[num].ctx) {

	if (exec_list[i].dtsc > max_tsc) max_tsc = exec_list[i].dtsc;

	temp_tsc += exec_list[i].dtsc;

	k++;

      }

    printf("  Total Execution dTSC [%12llu]\n",temp_tsc);

    printf("  Interrupts Number    [%12d]\n",k);

    printf("  Mean Interrupt  dTSC [%12llu]\n",temp_tsc / k);

    printf("  Max  Interrupt  dTSC [%12llu]\n\n",max_tsc);

    last_start = 0;

    temp_tsc = 0;

    max_tsc = 0;

    k = 0;

    for (i=0;i<exec_total;i++)

      if (exec_list[i].ctx == context_list[num].ctx) {

	if (last_start == 0) {

		last_start = exec_list[i].start;

	} else {

		delta_start = exec_list[i].start - last_start;

        	if (delta_start > max_tsc) max_tsc = delta_start;

        	temp_tsc += delta_start;

        	k++;

		last_start = exec_list[i].start;

	}

      }

    printf("  Mean Arr. Delta dTSC [%12llu]\n",temp_tsc / k);

    printf("  Max  Arr. Delta dTSC [%12llu]\n\n",max_tsc);

  }

  if (task_type == PERIODICAL) {

    printf("Periodical Task CTX [%5d] PID [%s]\n",context_list[num].ctx,pidstr);

    temp_tsc = 0;

    max_tsc = 0;

    k = 0;

    for (i=0;i<exec_total;i++)

      if (exec_list[i].ctx == context_list[num].ctx) {

        if (exec_list[i].dtsc > max_tsc) max_tsc = exec_list[i].dtsc;

        temp_tsc += exec_list[i].dtsc;

        k++;

      }

    printf("  Total Execution dTSC [%12llu]\n",temp_tsc);

    printf("  Execs Number         [%12d]\n",k);

    printf("  Mean Exec       dTSC [%12llu]\n",temp_tsc / k);

    printf("  Max  Exec       dTSC [%12llu]\n\n",max_tsc);

    temp_tsc = 0;

    max_tsc = 0;

    k = 0;

    for (i=0;i<job_total;i++)

      if (job_list[i].ctx == context_list[num].ctx) {

        if (job_list[i].dtsc > max_tsc) max_tsc = job_list[i].dtsc;

        temp_tsc += job_list[i].dtsc;

        k++;

      }

    printf("  Total Job Exec  dTSC [%12llu]\n",temp_tsc);

    printf("  Jobs Number          [%12d]\n",k);

    printf("  Mean Job        dTSC [%12llu]\n",temp_tsc / k);

    printf("  Max  Job        dTSC [%12llu]\n\n",max_tsc);

    last_start = 0;

    temp_tsc = 0;

    max_tsc = 0;

    k = 0;

    for (i=0;i<job_total;i++)

      if (job_list[i].ctx == context_list[num].ctx) {

        if (last_start == 0) {

                last_start = job_list[i].start;

        } else {

                delta_start = job_list[i].start - last_start;

                if (delta_start > max_tsc) max_tsc = delta_start;

                temp_tsc += delta_start;

                k++;

                last_start = job_list[i].start;

        }

      }

    printf("  Mean Arr. Delta dTSC [%12llu]\n",temp_tsc / k);

    printf("  Max  Arr. Delta dTSC [%12llu]\n\n",max_tsc);

  }

  return 0;

}

int main(int argc, char *argv[]) {

  int events_total,k,i;

  int task_type;

  unsigned long long total_tsc;

  if (argc < 2) {

    printf("%s: Enter the input file name [%s filename]\n",argv[0],argv[0]);

    exit(1);

  }

  printf("\n");

  events_total = create_lists(argv[1]);

  printf("\nDelta TSC = %llu\n",log_end_tsc - log_start_tsc);

  printf("Events    [%8d]\n",events_total);

  printf("Execs     [%8d]\n",exec_total);

  printf("EndCycles [%8d]\n",endcycle_total);

  total_tsc = 0;

  for (i=0;i<exec_total;i++)

	total_tsc += exec_list[i].dtsc;

  /* Exec total execution check */

  printf("\nExec TSC sum = %llu (%2.2f)\n",total_tsc,(float)total_tsc/((float)(log_end_tsc - log_start_tsc))*100.0);

  printf("\nPreemption Removing.... \n");

  /* Remove preemption from the computation time */

  create_job_list();

  for (k=0;k<job_total;k++)

	printf("Job CTX [%5d] Start [%12llu] dTSC [%12llu]\n",

		job_list[k].ctx,job_list[k].start,job_list[k].dtsc);

  printf("\nCompute Task Statistics.... \n\n");

  for (i=0;i<context_total;i++) {

	task_type = BACKGROUND;

	if (context_list[i].ctx == INT_CTX) task_type = INTERRUPT;

	for (k=0;k<job_total;k++)

		if (job_list[k].ctx == context_list[i].ctx) {

		  task_type = PERIODICAL;

		  break;

		}

	elaborate_statistics(i,task_type);

  }

  return 0;

}