Commit c3a41aa3 authored by Neil Gershenfeld's avatar Neil Gershenfeld

wip

parent 15ed36d7
Pipeline #2740 passed with stage
in 1 second
<html>
<body>
<script src=tf.min.js></script>
<script>
//
// tf4pi.html
// Neil Gershenfeld 11/18/18
// Ann Yuan 12/4/18
// TensorFlow.js pi calculation benchmark
// pi = 3.14159265358979323846
//
const points = 1e10;
const a = tf.scalar(0.5)
const b = tf.scalar(0.75)
const c = tf.scalar(0.25)
const indicesPerTexel = 1000;
const outputSize = points / indicesPerTexel;
const divMulIndexSubProgram = {
variableNames: ['X', 'Y', 'Z'],
outputShape: [outputSize],
userCode: `
float compute(float i) {
return 0.5 / ((i - 0.75) * (i - 0.25));
}
void main() {
float i = float(getOutputCoords());
float sum = 0.;
for(int index=0; index<${indicesPerTexel}; index++) {
sum += compute(float(i * ${indicesPerTexel}. + float(index)));
}
setOutput(sum);
}
`
}
function divMulIndexSub(x, y, z) {
return tf.ENV.backend.compileAndRun(divMulIndexSubProgram, [x, y, z]);
}
function f() {
const product = divMulIndexSub(b, c, a);
return tf.sum(product).dataSync();
}
// Warmup
f();
const tstart = performance.now() / 1000
const sum = f();
const tend = performance.now() / 1000
const mflops = outputSize * 5.0 * indicesPerTexel * 1e-6 / (tend - tstart);
document.write('pi: ' + sum.toString())
document.write('<br>')
document.write('time: ' + (tend - tstart) + 's')
document.write('<br>')
document.write('estimated MFlops: ' + mflops)
</script>
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