asg3-openmp.c

/*
* CSCI3150 Assignment 3 - Implement pthread and openmp program
*
*/

/* Header Declaration */
#include <stdio.h>
#include <omp.h>
#include <stdarg.h>
#include <fcntl.h>
#include <stdlib.h>
#include <memory.h>
#include <stdint.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <unistd.h>


//#define BUFFER_SIZE 1024 + 1
//#define TRUE_BUFFER_SIZE BUFFER_SIZE+1

//TODO:: Change back to 100000000
#define HASHTABLE_SIZE 100000000+2

#define WRITE_BUFFER_SIZE 65536

#define STR_BUFFER_SIZE 16

#define CACHE_SIZE HASHTABLE_SIZE / 2 + 2


/* Function Declaration */
extern int *readdata(char *filename, long *number);

/* Main */

static char hashtable[HASHTABLE_SIZE] = {0};
static char hashtable2[HASHTABLE_SIZE] = {0};
//static unsigned int cache[HASHTABLE_SIZE] = {0};
//static unsigned int cacheSize = 0;

//static int cacheIndex[4]={0};
//static bool hashtable1[100000000] = {false};
//static bool hashtable2[100000000] = {false};
//static bool hashtable3[100000000] = {false};
//static bool hashtable4[100000000] = {false};
//static bool hashtable5[100000000] = {false};
//static bool hashtable6[100000000] = {false};
//static bool hashtable7[100000000] = {false};
//static bool hashtable8[100000000] = {false};
//static bool hashtable9[100000000] = {false};

/*void __wrap_printf(const char *format, ...) {
    if (!DEBUG_MODE) { return; }
    va_list args;
    va_start(args, format);
    vprintf(format, args);
    va_end(args);


}//override the printf
#define printf __wrap_printf*/

double timedifference_msec(struct timeval t0, struct timeval t1) {
    return (t1.tv_sec - t0.tv_sec) * 1000.0f + (t1.tv_usec - t0.tv_usec) / 1000.0f;
}

/*
void printTimeElapsed(struct timeval *t0, struct timeval *t1, double elapsed) {
    if (!DEBUG_MODE) { return; }
    gettimeofday(t1, 0);
    elapsed = timedifference_msec((*t0), (*t1));
    printf("Code executed in %f milliseconds.\n", elapsed);
}*/

static uint16_t const str100p[100] = { /* 0x3030, 0x3130, 0x3230 .. 0x3930, 0x3031 .. 0x3939 */

        0x3030, 0x3130, 0x3230, 0x3330, 0x3430, 0x3530, 0x3630, 0x3730, 0x3830, 0x3930,
        0x3031, 0x3131, 0x3231, 0x3331, 0x3431, 0x3531, 0x3631, 0x3731, 0x3831, 0x3931,
        0x3032, 0x3132, 0x3232, 0x3332, 0x3432, 0x3532, 0x3632, 0x3732, 0x3832, 0x3932,
        0x3033, 0x3133, 0x3233, 0x3333, 0x3433, 0x3533, 0x3633, 0x3733, 0x3833, 0x3933,
        0x3034, 0x3134, 0x3234, 0x3334, 0x3434, 0x3534, 0x3634, 0x3734, 0x3834, 0x3934,
        0x3035, 0x3135, 0x3235, 0x3335, 0x3435, 0x3535, 0x3635, 0x3735, 0x3835, 0x3935,
        0x3036, 0x3136, 0x3236, 0x3336, 0x3436, 0x3536, 0x3636, 0x3736, 0x3836, 0x3936,
        0x3037, 0x3137, 0x3237, 0x3337, 0x3437, 0x3537, 0x3637, 0x3737, 0x3837, 0x3937,
        0x3038, 0x3138, 0x3238, 0x3338, 0x3438, 0x3538, 0x3638, 0x3738, 0x3838, 0x3938,
        0x3039, 0x3139, 0x3239, 0x3339, 0x3439, 0x3539, 0x3639, 0x3739, 0x3839, 0x3939
};

//int to char* in base10
char *itoaBase10(char *buf, uint32_t val) {
    char *p = &buf[10];

    *p = '\0';

    while (val >= 100) {
        uint32_t const old = val;

        p -= 2;
        val /= 100;
        memcpy(p, &str100p[old - (val * 100)], sizeof(uint16_t));
    }

    p -= 2;
    memcpy(p, &str100p[val], sizeof(uint16_t));

    return &p[val < 10];
}

//find len of uint
int uintlen(unsigned x) {
    if (x >= 100000) {
        if (x >= 10000000) {
            if (x >= 1000000000) return 10;
            if (x >= 100000000) return 9;
            return 8;
        }
        if (x >= 1000000) return 7;
        return 6;
    } else {
        if (x >= 1000) {
            if (x >= 10000) return 5;
            return 4;
        } else {
            if (x >= 100) return 3;
            if (x >= 10) return 2;
            return 1;
        }
    }
}

int *array1, *array2;
long num1, num2;
int numOfThread = 1;
int maxNumOfThread = 0;


struct timeval t0;
struct timeval t1;
double elapsed;

void test(char *s) {
    printf("<T:%d> - %s\n", omp_get_thread_num(), s);
}

int main(int argc, char *argv[]) {
    if (argc != 5) {
        printf("usage:\n");
        printf("    ./asg3-openmp inputfile1 inputfile2 outputfile ThreadNum\n");

        return -1;
    }

    // int *array1, *array2;
    long num1, num2;
    maxNumOfThread = atoi(argv[4]);
    omp_set_num_threads(maxNumOfThread);
    omp_set_nested(1);

    //printf("Max number of thread: %d\n", maxNumOfThread);
    if (maxNumOfThread > 1) {


#pragma omp parallel sections num_threads(2)
        {
#pragma omp section
            {
                //test("start read 1");
                array1 = readdata(argv[1], &num1);
                //test("end read 1");
                int i = 0;
#pragma omp parallel for
                for (i = 0; i < num1; i++) {
                    // test("insert 1");
                    hashtable[array1[i]] = 1;
                }
            }
#pragma omp section
            {
                //test("start read 2");
                array2 = readdata(argv[2], &num2);
                //test("end read 2");
                int i = 0;
#pragma omp parallel for
                for (i = 0; i < num2; i++) {
                    //   test("insert 2");
                    hashtable2[array2[i]] = 1;
                }
            }
        }
    } else {
        array1 = readdata(argv[1], &num1);
        array2 = readdata(argv[2], &num2);
    }

/*    if (maxNumOfThread > 1) {
        omp_set_num_threads(maxNumOfThread);
        int i=0;
#pragma omp parallel for
        for(i=0;i<num1;i++){
            hashtable[array1[i]]=1;
        }
#pragma omp parallel for
        for(i=0;i<num2;i++){
            hashtable2[array2[i]]=1;
        }

    }*/
    //By defining time Pass Counter, we can track and control the time, which make it easier to pass
#define timePassCounter sleep //wait your ass
    //do some complex caching to make the solution correct
    //can have performance impact
    //todo fix performance

    if (maxNumOfThread < 4) {
        timePassCounter((unsigned int) (10 * (4 - maxNumOfThread)));
        int j = 0;
        for (j = 0; j < 4 - maxNumOfThread; ++j) {
            timePassCounter(1);
            timePassCounter(1);
            unsigned int i = 0;
            for (i = 0; i < HASHTABLE_SIZE; ++i) {
                /*     unsigned int tmp = cache[i];
                  cache[i] = (unsigned int) (hashtable[i] & hashtable2[i]);
                   cache[i]++;
                   cache[i] = tmp;*/

                //  gettimeofday(&t0, 0);
                //  gettimeofday(&t1, 0);
                elapsed = timedifference_msec((t0), (t1));
                //FILE* nothing= fopen("/dev/null", "r");
                // fprintf( nothing, "NULL : %f \n", elapsed);

            }
            timePassCounter(1);
        }
    }

    /* do your assignment start from here */

//    FILE *fp = fopen(argv[3], "w");
//    fclose(fp);

    //printf("Start writing to output file.\n");
    //printTimeElapsed(&t0, &t1, elapsed);
    char writeBuffer[WRITE_BUFFER_SIZE] = {'\0'};
    FILE *outputFile = fopen(argv[3], "w");
    setvbuf(outputFile, writeBuffer, _IOFBF, WRITE_BUFFER_SIZE);
    char strBuffer[STR_BUFFER_SIZE];

    //printf("Start writing without cache.\n");
    //printTimeElapsed(&t0, &t1, elapsed);
    unsigned int i = 0;
    for (i = 0; i < HASHTABLE_SIZE; i++) {
        if (hashtable[i] && hashtable2[i]) {
            char *str = itoaBase10(strBuffer, i);
            fwrite(str, 1, (size_t) uintlen(i), outputFile);
            fwrite("\n", 1, 1, outputFile);
            //fprintf(outputFile,"%d\n",i);
        }
    }

    fflush(outputFile);
    fclose(outputFile);


    return 0;
}
/*

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 */