Michael Chuah / Mbed 2 deprecated Benchmark

Benchmarking test code for various operations

Dependencies:   mbed

Fork of benchmark by Igor Martinovski

Benchmarking the performance of various mbed boards that I have

Using the excellent code by Igor, I have benchmarked the performance of the following platforms:

The data can be found in this link: https://docs.google.com/spreadsheets/d/1d5BcNvC341xvktRJ6DC3wdlI6wuv0FjCvCqHAnfINmQ/pubhtml

For the hyperbolic tan (tanh) function, I made a graph showing how the clock speed of various ARM Cortex-M4 boards with FPU affects the computation time in microseconds. Computation Time - tanh

Diff: main.cpp

Revision:
2:fc68d524dd7d
Parent:
1:f91e7bc0e244
Child:
3:ec2e20a9bd03
--- a/main.cpp	Mon Aug 17 20:14:39 2015 +0000
+++ b/main.cpp	Thu Nov 19 21:41:58 2015 +0000
@@ -13,13 +13,13 @@
 */
 
 #define ITERATIONS 1000000    // Number of calculations.
-#define CLOCK 100              // Clock freqency in MHz
+#define CLOCK 48              // Clock freqency in MHz
 Timer timer;                       // Timer..
 
 Serial pc(USBTX, USBRX);
 float number_of_cycles, single_operation_time;
-//volatile int a, b, c;              // Int operands and result. Must be volatile!
-volatile float a, b, c;            // Float operands and result. Must be volatile!
+volatile int a, b, c;              // Int operands and result. Must be volatile!
+//volatile float a, b, c;            // Float operands and result. Must be volatile!
 //volatile double a, b, c;            // Float operands and result. Must be volatile!
 
 int main() {
@@ -44,7 +44,7 @@
     this for loop. */
     for (i=0; i<ITERATIONS; i++){
         
-//        a = b;
+        a = b;
 //        c = a+b;
 //        c = a*b;
 //        c = a/b;