Finished

F74086713/lab_12_time/G_1.md

@@ -0,0 +1,20 @@
+clock rate:
+CPU MHz:             2208.000
+// **Configuration**
+#define ROUNDS 1
+#define D_RDTSC 0
+#define D_GETTIME 1
+// **Configuration**
+
+| Trials | pi | Cycle/CPU rate (s) | Get time (s) | time command (s) |
+|-:|-:|-:|-:|-:|
+| trial 0 |  3.138316 | 0.000000 | 0.042528 | 0.045 |
+| trial 1 |  3.138316 | 0.000000 | 0.041640 | 0.044 |
+| trial 2 |  3.138316 | 0.000000 | 0.041792 | 0.044 |
+| trial 3 |  3.138316 | 0.000000 | 0.042085 | 0.045 |
+| trial 4 |  3.138316 | 0.000000 | 0.041971 | 0.045 |
+| trial 5 |  3.138316 | 0.000000 | 0.041302 | 0.044 |
+| trial 6 |  3.138316 | 0.000000 | 0.042573 | 0.054 |
+| trial 7 |  3.138316 | 0.000000 | 0.042770 | 0.045 |
+| trial 8 |  3.138316 | 0.000000 | 0.041754 | 0.045 |
+| trial 9 |  3.138316 | 0.000000 | 0.042302 | 0.045 |

F74086713/lab_12_time/G_10.md

@@ -0,0 +1,20 @@
+clock rate:
+CPU MHz:             2208.000
+// **Configuration**
+#define ROUNDS 10
+#define D_RDTSC 0
+#define D_GETTIME 1
+// **Configuration**
+
+| Trials | pi | Cycle/CPU rate (s) | Get time (s) | time command (s) |
+|-:|-:|-:|-:|-:|
+| trial 0 |  3.138354 | 0.000000 | 0.041841 | 0.421 |
+| trial 1 |  3.139321 | 0.000000 | 0.043010 | 0.433 |
+| trial 2 |  3.139321 | 0.000000 | 0.043449 | 0.437 |
+| trial 3 |  3.139321 | 0.000000 | 0.041818 | 0.421 |
+| trial 4 |  3.139631 | 0.000000 | 0.042357 | 0.427 |
+| trial 5 |  3.139631 | 0.000000 | 0.042768 | 0.430 |
+| trial 6 |  3.139374 | 0.000000 | 0.041555 | 0.419 |
+| trial 7 |  3.139374 | 0.000000 | 0.042045 | 0.424 |
+| trial 8 |  3.139143 | 0.000000 | 0.042304 | 0.426 |
+| trial 9 |  3.139143 | 0.000000 | 0.042771 | 0.432 |

F74086713/lab_12_time/G_100.md

@@ -0,0 +1,20 @@
+clock rate:
+CPU MHz:             2208.000
+// **Configuration**
+#define ROUNDS 100
+#define D_RDTSC 0
+#define D_GETTIME 1
+// **Configuration**
+
+| Trials | pi | Cycle/CPU rate (s) | Get time (s) | time command (s) |
+|-:|-:|-:|-:|-:|
+| trial 0 |  3.139117 | 0.000000 | 0.042178 | 4.221 |
+| trial 1 |  3.139488 | 0.000000 | 0.043114 | 4.314 |
+| trial 2 |  3.139476 | 0.000000 | 0.043685 | 4.371 |
+| trial 3 |  3.139584 | 0.000000 | 0.042400 | 4.243 |
+| trial 4 |  3.139554 | 0.000000 | 0.041878 | 4.190 |
+| trial 5 |  3.139197 | 0.000000 | 0.042060 | 4.209 |
+| trial 6 |  3.139181 | 0.000000 | 0.042515 | 4.254 |
+| trial 7 |  3.139216 | 0.000000 | 0.041951 | 4.199 |
+| trial 8 |  3.139116 | 0.000000 | 0.043369 | 4.341 |
+| trial 9 |  3.139523 | 0.000000 | 0.042715 | 4.274 |

F74086713/lab_12_time/R_1.md

@@ -0,0 +1,20 @@
+clock rate:
+CPU MHz:             2208.000
+// **Configuration**
+#define ROUNDS 1
+#define D_RDTSC 1
+#define D_GETTIME 0
+// **Configuration**
+
+| Trials | pi | Cycle/CPU rate (s) | Get time (s) | time command (s) |
+|-:|-:|-:|-:|-:|
+| trial 0 |  3.143032 | 0.042294 | 0.000000 | 0.045 |
+| trial 1 |  3.143032 | 0.041880 | 0.000000 | 0.045 |
+| trial 2 |  3.143032 | 0.042306 | 0.000000 | 0.045 |
+| trial 3 |  3.143032 | 0.042010 | 0.000000 | 0.045 |
+| trial 4 |  3.143032 | 0.043833 | 0.000000 | 0.046 |
+| trial 5 |  3.143032 | 0.041769 | 0.000000 | 0.045 |
+| trial 6 |  3.143032 | 0.041953 | 0.000000 | 0.046 |
+| trial 7 |  3.143032 | 0.042780 | 0.000000 | 0.046 |
+| trial 8 |  3.136320 | 0.041813 | 0.000000 | 0.044 |
+| trial 9 |  3.136320 | 0.045151 | 0.000000 | 0.048 |

F74086713/lab_12_time/R_10.md

@@ -0,0 +1,20 @@
+clock rate:
+CPU MHz:             2208.000
+// **Configuration**
+#define ROUNDS 10
+#define D_RDTSC 1
+#define D_GETTIME 0
+// **Configuration**
+
+| Trials | pi | Cycle/CPU rate (s) | Get time (s) | time command (s) |
+|-:|-:|-:|-:|-:|
+| trial 0 |  3.138462 | 0.041565 | 0.000000 | 0.418 |
+| trial 1 |  3.138462 | 0.043313 | 0.000000 | 0.438 |
+| trial 2 |  3.140276 | 0.044828 | 0.000000 | 0.451 |
+| trial 3 |  3.140276 | 0.042138 | 0.000000 | 0.424 |
+| trial 4 |  3.138439 | 0.042947 | 0.000000 | 0.432 |
+| trial 5 |  3.138439 | 0.041612 | 0.000000 | 0.420 |
+| trial 6 |  3.140058 | 0.041777 | 0.000000 | 0.420 |
+| trial 7 |  3.140058 | 0.041936 | 0.000000 | 0.422 |
+| trial 8 |  3.140058 | 0.041743 | 0.000000 | 0.420 |
+| trial 9 |  3.140721 | 0.042269 | 0.000000 | 0.426 |

F74086713/lab_12_time/R_100.md

@@ -0,0 +1,20 @@
+clock rate:
+CPU MHz:             2208.000
+// **Configuration**
+#define ROUNDS 100
+#define D_RDTSC 1
+#define D_GETTIME 0
+// **Configuration**
+
+| Trials | pi | Cycle/CPU rate (s) | Get time (s) | time command (s) |
+|-:|-:|-:|-:|-:|
+| trial 0 |  3.139732 | 0.042229 | 0.000000 | 4.226 |
+| trial 1 |  3.139171 | 0.041970 | 0.000000 | 4.200 |
+| trial 2 |  3.139514 | 0.043300 | 0.000000 | 4.333 |
+| trial 3 |  3.139461 | 0.042658 | 0.000000 | 4.269 |
+| trial 4 |  3.139330 | 0.042689 | 0.000000 | 4.272 |
+| trial 5 |  3.139469 | 0.043230 | 0.000000 | 4.326 |
+| trial 6 |  3.139297 | 0.042185 | 0.000000 | 4.221 |
+| trial 7 |  3.139116 | 0.042656 | 0.000000 | 4.268 |
+| trial 8 |  3.139279 | 0.043051 | 0.000000 | 4.308 |
+| trial 9 |  3.139201 | 0.042019 | 0.000000 | 4.205 |

F74086713/lab_12_time/T_1.md

@@ -0,0 +1,20 @@
+clock rate:
+CPU MHz:             2208.000
+// **Configuration**
+#define ROUNDS 1
+#define D_RDTSC 0
+#define D_GETTIME 0
+// **Configuration**
+
+| Trials | pi | Cycle/CPU rate (s) | Get time (s) | time command (s) |
+|-:|-:|-:|-:|-:|
+| trial 0 |  3.140140 | 0.000000 | 0.000000 | 0.045 |
+| trial 1 |  3.140140 | 0.000000 | 0.000000 | 0.045 |
+| trial 2 |  3.140140 | 0.000000 | 0.000000 | 0.046 |
+| trial 3 |  3.140140 | 0.000000 | 0.000000 | 0.045 |
+| trial 4 |  3.140140 | 0.000000 | 0.000000 | 0.046 |
+| trial 5 |  3.140140 | 0.000000 | 0.000000 | 0.045 |
+| trial 6 |  3.140140 | 0.000000 | 0.000000 | 0.045 |
+| trial 7 |  3.140140 | 0.000000 | 0.000000 | 0.045 |
+| trial 8 |  3.140140 | 0.000000 | 0.000000 | 0.044 |
+| trial 9 |  3.140140 | 0.000000 | 0.000000 | 0.045 |

F74086713/lab_12_time/T_10.md

@@ -0,0 +1,20 @@
+clock rate:
+CPU MHz:             2208.000
+// **Configuration**
+#define ROUNDS 10
+#define D_RDTSC 0
+#define D_GETTIME 0
+// **Configuration**
+
+| Trials | pi | Cycle/CPU rate (s) | Get time (s) | time command (s) |
+|-:|-:|-:|-:|-:|
+| trial 0 |  3.139791 | 0.000000 | 0.000000 | 0.419 |
+| trial 1 |  3.139791 | 0.000000 | 0.000000 | 0.424 |
+| trial 2 |  3.139791 | 0.000000 | 0.000000 | 0.429 |
+| trial 3 |  3.139097 | 0.000000 | 0.000000 | 0.450 |
+| trial 4 |  3.139097 | 0.000000 | 0.000000 | 0.425 |
+| trial 5 |  3.137966 | 0.000000 | 0.000000 | 0.423 |
+| trial 6 |  3.137966 | 0.000000 | 0.000000 | 0.429 |
+| trial 7 |  3.139175 | 0.000000 | 0.000000 | 0.424 |
+| trial 8 |  3.139175 | 0.000000 | 0.000000 | 0.422 |
+| trial 9 |  3.139175 | 0.000000 | 0.000000 | 0.421 |

F74086713/lab_12_time/T_100.md

@@ -0,0 +1,20 @@
+clock rate:
+CPU MHz:             2208.000
+// **Configuration**
+#define ROUNDS 100
+#define D_RDTSC 0
+#define D_GETTIME 0
+// **Configuration**
+
+| Trials | pi | Cycle/CPU rate (s) | Get time (s) | time command (s) |
+|-:|-:|-:|-:|-:|
+| trial 0 |  3.139144 | 0.000000 | 0.000000 | 4.348 |
+| trial 1 |  3.139513 | 0.000000 | 0.000000 | 4.255 |
+| trial 2 |  3.139295 | 0.000000 | 0.000000 | 4.233 |
+| trial 3 |  3.139682 | 0.000000 | 0.000000 | 4.237 |
+| trial 4 |  3.139141 | 0.000000 | 0.000000 | 4.219 |
+| trial 5 |  3.139394 | 0.000000 | 0.000000 | 4.233 |
+| trial 6 |  3.139376 | 0.000000 | 0.000000 | 4.259 |
+| trial 7 |  3.139133 | 0.000000 | 0.000000 | 4.251 |
+| trial 8 |  3.139272 | 0.000000 | 0.000000 | 4.247 |
+| trial 9 |  3.139551 | 0.000000 | 0.000000 | 4.185 |

F74086713/lab_12_time/pi.c

@@ -0,0 +1,184 @@
+// **Configuration**
+#define ROUNDS 100
+#define D_RDTSC 0
+#define D_GETTIME 1
+// **Configuration**
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <time.h>
+
+double get_cpu_rate() {
+
+    // Ref: https://stackoverflow.com/a/646254/6734174
+
+    FILE *fp;
+
+    char buffer[20];
+
+    double ret = 0;
+
+    const char* cmd = "lscpu | grep -oP \'MHz:\\s+\\K.*\' | head -n 1";
+
+    fp = popen(cmd, "r");
+
+    if (fp == NULL) {
+
+        printf("Failed to run command\n" );
+
+        exit(1);
+
+    }
+
+    while (fgets(buffer, sizeof(buffer), fp) != NULL) {
+
+        ret = atof(buffer);
+
+    }
+
+    pclose(fp);
+
+    return ret;
+
+}
+
+
+
+#if D_RDTSC
+
+/* assembly code to read the TSC */
+
+static inline uint64_t RDTSC() {
+
+    unsigned int hi, lo;
+
+    __asm__ volatile("rdtsc" : "=a" (lo), "=d" (hi));
+
+    return ((uint64_t)hi << 32) | lo;
+
+}
+
+#endif
+
+
+
+#if D_GETTIME
+
+double GETTIME() {
+
+    struct timespec ts;
+
+    double sec;
+
+    clock_gettime(CLOCK_REALTIME, &ts);
+
+    sec = ts.tv_nsec;
+
+    sec /= 1e9;
+
+    sec += ts.tv_sec;
+
+    return sec;
+
+}
+
+#endif
+
+
+
+int main(int argc, char** argv)
+
+{
+
+    const uint64_t interval = 1000;
+
+    double rand_x, rand_y, origin_dist;
+
+    uint64_t circle_points = 0, square_points = 0;
+
+    uint64_t measure_rdtsc = 0;
+
+    double measure_gettime = 0;
+
+    double arr_pi[ROUNDS] = {};
+
+    srand(time(NULL));
+
+
+
+#if D_RDTSC
+
+    uint64_t c1 = RDTSC();
+
+#endif
+
+#if D_GETTIME
+
+    double t1 = GETTIME();
+
+#endif
+
+
+
+    for (int r = 0; r < ROUNDS; r++) {
+
+        for (uint64_t i = 0; i < (interval * interval); i++) {
+
+            rand_x = (double)(rand() % (interval + 1)) / interval;
+
+            rand_y = (double)(rand() % (interval + 1)) / interval;
+
+            origin_dist = rand_x * rand_x + rand_y * rand_y;
+
+            if (origin_dist <= 1.0)
+
+                circle_points++;
+
+            square_points++;
+
+        }
+
+        arr_pi[r] = (double)(4 * circle_points) / square_points;
+
+    }
+
+
+
+#if D_RDTSC
+
+    uint64_t cycle = RDTSC()-c1;
+
+    measure_rdtsc = cycle;
+
+#endif
+
+#if D_GETTIME
+
+    double time_s = GETTIME()-t1;
+
+    measure_gettime = time_s;
+
+#endif
+
+
+
+    double sum_pi = 0;
+
+    for(int i = 0; i < ROUNDS; i++) {
+
+        sum_pi += arr_pi[i];
+
+    }
+
+    double cpu_rate = get_cpu_rate();
+
+    printf(" %.6lf |", (double)sum_pi/ROUNDS);
+
+    printf(" %.6lf |", (double)measure_rdtsc/ROUNDS/(cpu_rate*1000000));
+
+    printf(" %.6lf | ", (double)measure_gettime/ROUNDS);
+
+    return 0;
+
+}